25 June

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 04:01
  RTSP Client for H264 Audio/Video Stream - Jean-Philippe Encausse Newest 'ffmpeg' Questions - Stack Overflow
  I'm looking for a simple way to get data of an IP Camera RTSP Stream (using H264 Audio/Video) and get on the other side a frame by frame byte[] a stream of the audio After many research EmguCV Capture seems hanging forever (no answer from forum) There is many (too big) RTSP Server few decode H264 There is "slow" ffmpeg wrapper There is some managed DirectShow wrapper So I don't know where to go ? And how to do this ? It seems iSpyCamera is doing the job but it's a big project not a little (...) -- RTSP Server
• 01:49
  Issues in python based ffmpeg operation - Adideva98 Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to write a script that would automatically take duration values and chop an audio file into smaller splits. To do this I have saved all my start times and durations in a list. And this is the code I am trying to run. for k in range(0,len(start_time)): s=start_time[k] e=Duration[k] filename = "output%d.mp3" % (k) !ffmpeg -i Audio.mp3 -ss s -t e -acodec copy filename k=k+1 On running this I get the following error Invalid duration specification for ss: s I suspect that this error arises because of the fact that since I am using (...)
• 00:18
  Convert a video with content type video/quicktime to video/mp4 using ffmpeg - schub Newest 'ffmpeg' Questions - Stack Overflow
  I have a strange problem. I start with a video file recored with an iPhone. The output is video.mov. I convert this to mp4 using ffmpeg: ffmpeg -i video.mov -vcodec h264 -acodec aac video.mp4 If I use a tool like exiftool to show the metadata the output for content-type is video/mp4 all seems to be correct. But my backend, which receives the video, uses a library called Apache Tika to extract the content type and the result here is: video/quicktime. Scala code to retrieve the content type from the file: // byteArray: Array[Byte] val tika = new (...)
• 00:13
  Can you call out to FFMPEG in a Firebase Cloud Function - Dave Parks Newest 'ffmpeg' Questions - Stack Overflow
  Per the Firebase Cloud Functions documentation, you can leverage ImageMagick from within a cloud function: https://firebase.google.com/docs/functions/use-cases Is it possible do something similar but call out to FFMPEG instead of ImageMagick? While thumbnailing images is great, I'd also like the capability to append incoming images to a video file stored out on Firebase Storage. -- https://firebase.google.com/docs/functions/use-cases

24 June

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 21:45
  How can I CORS enable with callback function using golang? [closed] - mr jony Newest 'ffmpeg' Questions - Stack Overflow
  How can I CORS enable remote server that means video streaming from remote server or IP address? I want to CORS enable using callback function using GOLANG.
• 22:58
  FFmpeg problems: encode/normalize then concat multiples videos - BDR Newest 'ffmpeg' Questions - Stack Overflow
  I want to: encode a lot of videos to add text concat them into one final video (preferably with re-encoding) I need the operations to be done in distinct 2 steps. I read a lot of posts but don't manage to find the correct solution. The videos comes from different source, and so have different encoding settings. To encode the videos I use the following command: ffmpeg -i input.1.mp4 -vcodec libx264 -acodec aac -pix_fmt yuv420p-vf scale=1920:-2, drawtext=fontfile=./roboto.ttf: fontsize=40: text='ABC': x=(w-text_w)-w/20: y=(h-text_h)-h/20 (...)
• 21:57
  How to manipulate audio volume in ffmpeg - JohnTerry Newest 'ffmpeg' Questions - Stack Overflow
  I am working on a ffmpeg command to overlay background music to a video which already has audio. below is the command - ffmpeg -i video_with_audio.webm -stream_loop -1 -i overlay_music.mp3 -vcodec copy -filter_complex amix -acodec libopus -mapping_family 0 -b:a 96k -shortest -map 0:v:0 -map 1:a:0 output_video.webm the above command is working fine but i also want to control the volume of the both audios. so for this purpose i am using the command- cmd = "ffmpeg -i -filter_complex (...)
• 20:10
  Why are there multiple timescale specified in a MP4/AVC container file? - Lexx32117 Newest 'ffmpeg' Questions - Stack Overflow
  I am currently parsing a MPEG-DASH stream initialization segment (generated by FFMPEG) and I noticed that the timescale is specified at multiple different places in my file: In the movie header box (mvhd): 1000 In the media header box of my video track (mdhd): 15360 In the AVC Configuration box (avcC) more precisely in the VUI section of the sequence parameter set NAL unit: 60 Why is it specified in so many different places? Why do they have different values? Is there a hierarchy in these value? For example does 60 overrides 15360 and 15360 overrides 1000?  (...)
• 07:13
  Extract thumbnail from video in amazon s3 and store it in amazon s3 [closed] - Kanav Raina Newest 'ffmpeg' Questions - Stack Overflow
  I want to extract thumbnail from video and store it on s3. import ffmpeg url="https://link_to_s3_video.mp4" ( ffmpeg .input(url, ss='00:00:03') .output("frame.png", pix_fmt='rgb24', frames='1') .overwrite_output() .run() ) I am able to extract image but now how should I pass this image to file_upload function and store it on s3 def file_upload(file, filename): link = f"https://PUBLIC_BUCKET_NAME.s3.us-east-2.amazonaws.com/images/filename" try: s3.Object(PUBLIC_BUCKET_NAME, (...)
• 18:32
  youtube_dl - Overwritting metadata - TipeneField Newest 'ffmpeg' Questions - Stack Overflow
  I have managed to extract the title and artist using the --metadata-from-title option, but it seems that it does not overwrite if those metadata items already exist in the video file. I'm am using: py -3 -m youtube_dl -o "%(title)s.%(ext)s" -x --audio-format mp3 --audio-quality 320K --embed-thumbnail --add-metadata --metadata-from-title "%(artist)s ~ %(title)s" oLNMnOYEMAA Is this is a bug? If not then is it possible to overwrite the existing values? I know that you can do it using the postprocessor-args command, but do not know if it is (...)
• 18:05
  FFmpeg problems: encode then concat multiples videos - BDR Newest 'ffmpeg' Questions - Stack Overflow
  I want to: encode a lot of videos to add text concat them into one final video (preferably with re-encoding) I need the operations to be done in distinct 2 steps. I read a lot of posts but don't manage to find the correct solution. The videos comes from different source, and so have different encoding settings. To encode the videos I use the following command: ffmpeg -i input.1.mp4 -vcodec libx264 -acodec aac -pix_fmt yuv420p-vf scale=1920:-2, drawtext=fontfile=./roboto.ttf: fontsize=40: text='ABC': x=(w-text_w)-w/20: y=(h-text_h)-h/20 (...)
• 18:44
  ffmpeg mp4 to webm through icecast server livestream - Aporie Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to stream huge MP4 videos (2.5Go) on an icecast server. After playing a lot with ffmpeg options to get the best quality/speed encoding settings, I'm facing a strange issue. If I launch my ffmpeg streaming and load the video in the browser I can see it, but if I try to join it after 30s, I just get a black screen with the bottom video player bar. Is there somewhere we can see errors ? And where ? I don't really get if the error is coming from ffmpeg / icecast / my web browser ... If somebody can give me a clue. Here is my (...)
• 17:12
  FFMPEG Recording Audio from Adafruit I2S MEMS Microphone Having Issues - Turkey Newest 'ffmpeg' Questions - Stack Overflow
  I am attempting to use FFMPEG to record and stream video off a Raspberry Pi Zero using the pi camera and the Adafruit I2S MEMS Microphone. I have successfully gotten video recording, but I am having trouble getting the audio correctly added on. I followed the directions at https://learn.adafruit.com/adafruit-i2s-mems-microphone-breakout/raspberry-pi-wiring-test and using their command of arecord -D dmic_sv -c2 -r 44100 -f S32_LE -t wav -V mono -v file.wav I do get a correct audio recording with no issues. However with my FFMPEG command of ffmpeg -f alsa -ar 44100 -ac 2 -c:a (...) -- https://learn.adafruit.com/adafruit-i2s-mems-microphone-breakout/raspberry-pi-wiring-test, Working arecord audio, Recorded Audio Issues Example, Stream Audio Issues Example
• 16:15
  Error : undefined reference to `x264_encoder_open_155' - Shankar Newest 'ffmpeg' Questions - Stack Overflow
  I had done sudo apt-get update sudo apt-get upgrade after that i am getting this error while compiling project: ffmpeg/libavcodec/libx264.c:948: undefined reference to `x264_encoder_open_155' Even i tried to build ffmpeg, i still got same error. Is there any solution or suggestions for this error?
• 15:59
  Why can't receive the rtp stream from another pc in the same network? - Oğuzhan Karahan Newest 'ffmpeg' Questions - Stack Overflow
  I am streaming the desktop over rtp using ffmpeg from computer A. Here is my ffmpeg code: ffmpeg -f x11grab -framerate 25 -video_size 1920x1080 -i :1.0 -c:v libx264 -preset fast -pix_fmt bgr0 -b:v 3M -g 25 -an -f rtp_mpegts rtp://230.0.0.1:5005 I can play the live stream in vlc in the computer A in "rtp://ⓐ230.0.0.1:5005". But I can't play the stream from computer B that is in the same network with computer A. If I stream an mp4 file over http, than computer B is able to play it. What am I doing wrong (...)
• 14:57
  ffmpeg width not divided by 2 (2247x1500) [duplicate] - Ruiqing Wu Newest 'ffmpeg' Questions - Stack Overflow
  [libx264 ⓐ 0000021db7838c80] width not divisible by 2 (2247x1500) Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height Conversion failed! My code was: ffmpeg -y -framerate 10 -start_number 0 -i "a__%08d.jpg" -c:v libx264 -vf scale=-1:1500 -pix_fmt yuv420p d:\\lustars1.mp4 Is there a way to bypass this?
• 14:59
  FFMpegCore C# read bytes from file - Konrad Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to read byte array or stream from mp4/h264 file using "FFMpegCore" library. I am trying to read file and store it into fileStreamOnlyWithMedia but I have error Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument" var fileStreamOnlyWithMedia = new MemoryStream(); FFMpegArguments .FromFileInput(filePath) .OutputToPipe(new StreamPipeSink(fileStreamOnlyWithMedia), options => options  (...)
• 14:46
  How to flip a video horizontally or vertically on command-line terminal with ffmpeg? - Abhi25t Newest 'ffmpeg' Questions - Stack Overflow
  Python solution is here. But how to do it on command-line in terminal (without python dependency)?
• 13:54
  FFmpeg Overlay Filter Changes Source FPS - user4134414 Newest 'ffmpeg' Questions - Stack Overflow
  I want to overlay a video on top of another slow-motion video. Surprisingly, the overlay becomes also slow-motion. I'm applying the following command: ffmpeg -to 00:00:01.000 -i camera1.mp4 // original video -ss 00:00:02.000 -to 00:00:09.000 -i confeti.mov // overlay video -filter_complex '[0]setpts=3.333*PTS[s0]; [s0][1]overlay' // change FPS of original video and overlay -r 24 out.mp4 The output can be seen here: out.mp4 As you can see, the "confetti" overlay is slow while the original video is playing and go back to normal (...) -- out.mp4
• 13:47
  FFmpeg api generating distorted image when using 422 or 420 chroma subsampling and SD resoltuion - faboudib Newest 'ffmpeg' Questions - Stack Overflow
  I created an application based on FFmpeg api. The application reads video frames, does some processing, then writes the processed video frames to a new file. The application is working perfectly fine in most circumstances. However, I'm facing weird output when the application is configured to use 420 or 422 chroma subsampling with SD resolution (720x480). When using 420 or 422 chroma subsampling with HD resolution (1920x1080), the output turns out fine. With the distorted output I can see the problem is with the subsampled channels. The Y channel looks good, but Cr and Cb seem to be (...) -- Original input video, Correct output video (HD), Distorted output video (SD)
• 13:19
  Unable to convert dual fisheye image to equirectangular image using ffmpeg package - Soumyarian Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to convert dual fisheye image captured in an insta360 camera to equirectangular format using the ffmpeg package but I am unable to get the correct result. I used the following code, ffmpeg -i input.jpg -vf v360=dfisheye:equirect:ih_fov=360:iv_fov=360 output.jpg the input image,input_image the output image, output_image thank you in advance. -- input_image, output_image
• 13:03
  Create tile image with background using ffmpeg - Abhay Koradiya Newest 'ffmpeg' Questions - Stack Overflow
  I need to export tile image with background image. without background I can generate it with following command ffmpeg -loop 1 -t 2.56 -i flower.jpg -filter_complex tile=8x4:margin=32:padding=32 output_0.png Here is flower image Output Without background But when I am trying with following command for adding background to tile, no success. can anyone correct my command? ffmpeg -loop 1 -t 2.56 -i bg.jpg -i flower.jpg -filter_complex '[0:v]scale=1280:720,setsar=1[in1],[1:v]tile=8x4:margin=32:padding=32[in2];[in1][in2]' -map '[in1]' -map (...) -- flower image, Output Without background
• 12:56
  OCI runtime exec failed: exec failed: (...) executable file not found in $PATH": unknown - Uğur Kaya Newest 'ffmpeg' Questions - Stack Overflow
  I have dockerized an app which has ffmpeg installed in it via libav-tools. The app launches without problem, yet the problem occured when fluent-ffmpeg npm module tried to execute ffmpeg command, which was not found. When I wanted to check the version of the ffmpeg and the linux distro set up in the image, I used sudo docker exec -it c44f29d30753 "lsb_release -a" command, but it gave the following error: OCI runtime exec failed: exec failed: container_linux.go:296: starting container process caused "exec: \\"lsb_release -a\\": executable file not found in $PATH": unknown Then I (...)
• 12:42
  Overlay and scalling issue in while creating video using mobile-ffmpeg android? - najam ulhassan Newest 'ffmpeg' Questions - Stack Overflow
  I am using command below to create a video including gif, images and an audio file, my output is merging all the inputs but there is a problem in scaling and overlaying images. My frame size is 600:900 and every image overlaying factors are with in frame but every image having more then 200 approx overlay in height or width is going out of frame, behind it is scalling more as I required even with these small scales... E/ffCOMMAND: -y -ignore_loop 0 -t 30 -i 'Gif name.gif' -loop 1 -i 'image_0.png' -loop 1 -i 'image_1.png' -loop (...)
• 11:58
  Output a video file from ffmpeg directly to google cloud storage - Anup Sedhain Newest 'ffmpeg' Questions - Stack Overflow
  Background on the problem We are trying to compress a video using FFmpeg in our server that is hosted in the Google App Engine (GAE). The input file is in Google Cloud Storage (GCS) which can be easily passed as an input to FFmpeg and the processing is done, however, I wanted to output the file directly to GCS. I have referred to the documentation here https://ffmpeg.org/ffmpeg-protocols.html#http that they provided and used the correct headers and method to upload the file using a signed URL, but it doesn't seem to work. As of now, I am not even sure whether this is (...) -- https://ffmpeg.org/ffmpeg-protocols.html#http
• 11:43
  laravel ffmpeg setAdditionalParameters not adding filters when using exportForHLS - Warren Visser Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to add additional filters using the setAdditionalParameters method to the bitrate using Laravel Ffmpeg. When I add the additional filters it does not show when used in combination with exportForHLS. It does however work when using the export method. When using exportForHLS the addFilter method adds a complex filter and not a simple filter. Any idea how to achieve this or is this a bug inside the package. public function convert(File $file, Movie $movie) try $additionalParameters = ['-preset:v', 'ultrafast']; // convert (...)
• 11:38
  how to set frame delay when use ffmpeg to convert images to gif - yang Newest 'ffmpeg' Questions - Stack Overflow
  I want to convert image sequence to gif and I want each frame to last for a certain amount of time, but I couldn't find an example of how to do this. I know this basic command works ffmpeg -y -i %0d_Frame.jpg output.gif but how can I let each frame stay for 1 second?
• 10:53
  Cross device h264 compatible html5 video - mikkelam Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to serve a large video of timelapses generated from a series of images, I have encoded the video as an h264 mp4. I'm running into compatibility issues where the videos are not playable on iOS (safari) as well as on Windows (all browsers except chrome). Where i'm getting the following error: Error Code: NS_ERROR_DOM_MEDIA_FATAL_ERR (0x806e0005) Details: mozilla::MediaResult __cdecl mozilla::WMFVideoMFTManager::ValidateVideoInfo(void): Can't decode H.264 stream because its resolution is out of the maximum limitation I'm just looking for (...)
• 10:30
  How to convert the frames of an ipcam read using opencv to a hls stream - avaj Newest 'ffmpeg' Questions - Stack Overflow
  I have a code where i read frames from a rtsp url, perform some processing and write the results. I want to display the processed frames as a hls stream. I found i can use ffmpeg for the same, but i have not been able to find any good source on how to do this. Any suggestions?
• 04:20
  does ffmpeg allocate memory and will not release immediately when encoding and decoding? - Tangtoo Newest 'ffmpeg' Questions - Stack Overflow
  i want to transform videos to jpeg and wav as output. I wrote the programm by myself with FFmpeg-api. The video(.webm e.g.) is decoded and video and audio frames are encoded to jpeg and wav. With running of the program, more and more videos are converted but more and more rss are used(top cmd in linux). I have also used valgrind to test if there is memory leak. And there is None. The rss increases not linear and like follows(just example): 1 video: 30m 2 video: 150m 3 video: 200m 4 video: 220m 5 video: 220m 6 video: 230m The programm run in docker (...)
• 02:23
  Audio decoders/encoders and different sample per frame rate - Salmond Newest 'ffmpeg' Questions - Stack Overflow
  How to convert audio frame with different samples per frame rate to desired target rate using ffmpeg C libraries? And what is the algorithm for that operation. I have a source MP3 file with 44100 sample rate and 1152 samples per frame. I want to encode it to AAC with the same sample rate but it expects 1024 samples per frame. As I understand, the algorithm for this operation would be to write 1024 samples from source, and then cache remaining 128 samples in a buffer, then on next packet read from this buffer and etc. Am I correct with that assumption or it is something (...)

23 June

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 21:29
  How to execute ffmpeg commands synchronously? - banshee Newest 'ffmpeg' Questions - Stack Overflow
  I have a video processing API and I want to run ffmpeg commands synchronously otherwise processed files are getting corrupted. So far I tried the steps below: var execute = (command) => const ffmpeg = spawn("./bin/ffmpeg/ffmpeg", command); ffmpeg.stderr.on("data", (data) => debug(data.toString()); ); ffmpeg.on("close", () => console.log('DONE'); ); ; var sourceFilePath = '/tmp/test.mp4'; var outputPath = '/tmp/test_processed.mp4'; var ss = 5; var t = 10; execute([  (...)
• 23:12
  How speedup embedded subtitles with ffmpeg? [closed] - Кармашек Newest 'ffmpeg' Questions - Stack Overflow
  I am converting bunch of videos with embedded subtitles and speed them up, but subtitles won`t change and plays as original speed. How can i use Subtitles stream in filter complex and change its speed? for %%i in (*.mkv) do ( ffmpeg -i "%%i" -filter_complex "[0:v]setpts=(1/1.15)*PTS[v];[0:a]atempo=1.15[a]" -map "[v]" -map "[a]" "edited/%%~ni_x1.15.mp4"
• 23:44
  Using FFMPEG to stream from one computer to another on the same network - Andy B Newest 'ffmpeg' Questions - Stack Overflow
  My problem I have a device with cameras, and I can access the video from those cameras via RTP over RTSP. I have an Ethernet cord going from the device to my computer, and I can see/record the video from the device using FFMPEG or VLC. I just use rtsp:///path/of/stuff.extension?camera= like the user's manual says. This works great, but ultimately, I want to stream this video to another computer on the same network. I have tried many different things, but nothing seems to work. Theoretically, this FFMPEG command should work, but I'm messing up somewhere and I (...)
• 22:41
  How can several .ts files be converted to one (non-fragmented) .mp4 file using ffmpeg? - verified_tinker Newest 'ffmpeg' Questions - Stack Overflow
  Problem Description The video player I'm using doesn't support .ts files, but it does play .mp4 files, so I'd like to use ffmpeg to convert my .ts files to .mp4 files. Goal Solution Use ffmpeg to download several .ts segments and transcode them into an .mp4 file that I'd load into my video player. Rinse and repeat. It'd add a delay of 10-20 seconds, but that's fine. The trick is to do the transcoding fast enough so, by the time one .mp4 file is finished playing, the next one is available; in other words, the transcoding should take less (...) -- ffmpeg-wasm, https://pastebin.com/FqvPQ1DZ
• 21:48
  Overlay Intro Titles/Video in FFMPEG and fix missing keyframes in one step - Digicrat Newest 'ffmpeg' Questions - Stack Overflow
  How can I optimally apply an intro video (replacing the few seconds of video with a potentially missing keyframe, but keep the original audio) in one step? I have a batch of input videos and a batch of associated (auto-generated) 'intro' videos to overlay on top of them (in this case, replacing the first 3 seconds of video). This is complicated by the fact that some of the input videos were cut in such a way that the first key frame is missing/corrupted in order to achieve the desired audio start point. My current working (but slow) two-step process (...)
• 20:19
  Remove formatting from sub when converting ass to srt with ffmpeg - k-on fan Newest 'ffmpeg' Questions - Stack Overflow
  ass files tend to have alot of extra formatting info if you convert a sub to srt from ass it will retain that info even if it doesn't work well is there a way to convert a sub from ass while removing formatting formatting information e.g from this \\an3waits impatiently for the wind. to this waits impatiently for the wind.
• 18:12
  Flutter | Retrieve ffprobe data - YourLogarithm Newest 'ffmpeg' Questions - Stack Overflow
  I'm using flutter_ffmpeg package, specifically I'm trying to retrieve information regarding the chapter marks from a .m4b file which is an audiobook. By using this method: _flutterFFmpeg.executeWithArguments(['-i', widget.book.path, '-print_format', 'json', '-show_chapters', '-loglevel', 'error']); I was able to output this data as a JSON map in the console. The thing is, I need to use this data inside my application, is there a way to get access to those chapters as a variable using another approach, or (...)
• 17:07
  Running Background Process using FFMPEG on Google Cloud Run stopping in middle - pashaplus Newest 'ffmpeg' Questions - Stack Overflow
  I have an external bash script that transcodes audio files using FFmpeg and then uploads the files to google cloud storage. I am using the google cloud run platform for this process but the process is stopping in the middle and not getting any clue from the logs. I am using the node js spawn command to execute the bash script const createHLSVOD = spawn('/bin/bash', [script, file.path, file.destination, contentId, EPPO_MUSIC_HSL_URL, 'Content', speed]); createHLSVOD.stdout.on('data', d => console.log(`stdout info: $d`));  (...) --
• 17:01
  cut fragment of mp3 from, to and apply fade in, fade out - Mevia Newest 'ffmpeg' Questions - Stack Overflow
  I am in need of a tool that will complete following tasks provide source mp3 provide data of fragment to cut (start time, end time) start cutting from source where start is end cutting from source where end is apply X seconds fade in beginning of start time apply Y seconds fade out beginning Y seconds subtracted from end By fade i mean increase / decrease volume between 0 - 100% / 100% - 0 I already have an interface that allows to prepare data. On the backend side, I am working with node.js. After some research i found a tool FFmpeg (...) -- FFmpeg
• 15:40
  add watermark to video with FFMPEG and convert to HLS for all resolution - sina Newest 'ffmpeg' Questions - Stack Overflow
  im using this package : aminyazdanpanah/PHP-FFmpeg-video-streaming and i try to add a watermark to a video and i am using "hls" after adding a watermark method ,the problem is the watermark is apply just for one resolutionand the other representations not works . for example i use this method : $video ->filters() ->watermark('sample.png', [ 'position' => 'relative', 'bottom' => 50, 'right' => 50, ]); $video->hls() ->setFormat($format) ->autoGenerateRepresentations([144,360,480]) (...)
• 14:56
  FFmpeg corrupted output from concatenation - Manumit Newest 'ffmpeg' Questions - Stack Overflow
  I used to be able to open CMD, type CD C:\\Users\\... and then ffmpeg -f concat -safe 0 -i xmylist.txt -crf 22 -c copy x1.mp4 The recording are from same phone, some from front cam, some from back cam. I understand this could cause non-identical problems? but it worked fine until recently. Now the output is corrupted with this log: The individual video files play just fine, so does most of the concatted output, but some sections become like this and freeze: (...) -- , , ,
• 14:36
  ffmpeg Disable default subtitle - Marco999 Newest 'ffmpeg' Questions - Stack Overflow
  I have many mkv files where I need to choose the audio / subtitle streams and set the favorite as default: ffmpeg.exe -y -i originale_ridotto.mkv -map 0:0 -map 0:1 -map 0:2 -map 0:5 -disposition:a:1 -default-forced -disposition:a:0 +default+forced -disposition:s -default -c copy prova.mkv With this command I can choose the audio track that I like and make the first audio as default and work for audio but not work for subtitles I have tried: -disposition:s -default -disposition:s:0 -default -default_mode infer_no_subs but in all case the (...)
• 13:26
  Download TS files from video stream - Nicky Smits Newest 'ffmpeg' Questions - Stack Overflow
  Videos on most sites make use of progressive downloading, which means that the video is downloaded to my computer, and easy to trace. There are lots of extensions out there to do this, and even in the dev-tools this is easily done. On certain websites videos are streamed. which means that we do no just download 1 file, we download lots of small packages. In the dev-tools these packages can be traced. The website I'm interested in is: http://www.rtlxl.nl/#!/goede-tijden-slechte-tijden-10821/c8e2bff7-5a5c-45cb-be2b-4b3b3e866ffb. The packages have a .TS (...) -- http://www.rtlxl.nl/#!/goede-tijden-slechte-tijden-10821/c8e2bff7-5a5c-45cb-be2b-4b3b3e866ffb
• 11:48
  Android ffmpeg video cut - Raupp Newest 'ffmpeg' Questions - Stack Overflow
  I´m trying to edit some videos in my Android app using FFmpeg, but I´m facing some problems when I tried to take just a part of the video. I´m using this ffmpeg compilation/lib https://github.com/WritingMinds/ffmpeg-android-java I tried to use this command to trim/cut the video "-y -i input.mp4 -ss 00:00:01.00 -t 00:00:15.000 -c copy output.mp4" But with some videos I´m getting a black screen or the video just freezes. The sound works fine in all my tests. With this command "-y -i input.mp4 -ss 00:00:01.000 (...) -- https://github.com/WritingMinds/ffmpeg-android-java, https://drive.google.com/file/d/0BzqJL_nNetbRYmxvcTljanJwR00/view?usp=sharing][1]
• 11:11
  FFmpeg is not working with the media file path containing whitespace in name - Kamran Ashiq Newest 'ffmpeg' Questions - Stack Overflow
  I am using react-native-ffmpeg with react native for basic video editing, however I am facing this issue if a media file uri contain whitespace then ffmpeg task failed with error message "No such file or directory". I have tried: RNFmeg.executeWithArguments but app crashes without any error message. Here is my command array. RNFFmpeg.executeWithArguments(["-i", videoPath, "-i", songPath, "-c:v", "copy", "-c:a", "aac", "-map", "0:v:0", "-map", "1:a:0", "-t", duration, $path$timeStamp.mp4]) One other solution I do'nt want to go with is to copy the media (...)
• 10:22
  Restreaming HLS video source to RTMP using ffmpeg.autogen - Andrew Wilcockson Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to write a C# restreaming class that will take HLS/m3u8 H264 encoded video streams and restream them as RTMP H264 encoded video. I started with the simple transport stream recorder sample and was able to make it work in the following scenarios: UDP restreamed to UDP (mpegts) UDP restreamed to RTMP (flv) HLS restreamed to UDP (mpegts) But cannot for the life of me get it to work with HLS to RTMP. I get a failure return code of -22 on my call to avformat_write_header Note that I can make this work perfectly from the command line version of ffmpeg with (...)
• 11:42
  Using ffmpeg to merge two audio file and one video file with control volume? - mdtuyen Newest 'ffmpeg' Questions - Stack Overflow
  I want to use ffmpeg to merge 2 audio files with one video file to create one video file, but in audio file I want to control the volume level of each file. What should I do ? ffmpeg -i video.mp4 -i input1.mp3 -i input2.mp3 -filter_complex "[1]volume=0.5,pan=2c[a];[2]volume=0.7,pan=2c[b];[a][b]amix=duration=shortest" -ac 2 -c:a libmp3lame -q:v 0 output.mp4
• 08:35
  before avio_open() function is executed, it has no connection with RTMP server - guoyanzhang Newest 'ffmpeg' Questions - Stack Overflow
  I'm a beginner of ffmpeg API. I think the function connecting to RTMP server is avio_open() function. In my code, before avio_open() function is executed, it has no connection with RTMP server. Whether I understand correctly. I have a problem at this time : the RTMP server does not find the key frame within 5 seconds after the client connects to the RTMP server, the server will close the connection. However, according to my understanding, the client has found the key frame before connecting to the server, so the server should also find the key frame. Why can't the key (...)
• 08:30
  Ffmpeg push video is successful, but why is there a mistake at the beginning? - guoyanzhang Newest 'ffmpeg' Questions - Stack Overflow
  I'm a beginner of ffmpeg. Now I use ffmpeg to push video stream to RTMP server, which can push successfully. But at the beginning, there were some errors. I don't know what caused them. This error happens every time. My read_ packet() callback function, the read data is READ_BUF_LEN = 1024 * 12 = 12288 bytes, it seems that it can't find the key frame in 12288 bytes, because READ_BUF_LEN is too small? #include "/usr/local/include/libavcodec/avcodec.h" #include "/usr/local/include/libavformat/avformat.h" #include (...)
• 08:12
  ffmpeg api : av_interleaved_write_frame return error broken pipe under linux - guoyanzhang Newest 'ffmpeg' Questions - Stack Overflow
  I just came into contact with the ffmpeg function, and I encountered a problem, av_interleaved_write_frame function fails and returns broken pipe. I don't know what the problem is? Someone on the Internet said there was a disconnect in the client or server，but what causes the disconnection? Please help me, thank you #include "/usr/local/include/libavcodec/avcodec.h" #include "/usr/local/include/libavformat/avformat.h" #include "/usr/local/include/libavfilter/avfilter.h" #include "/usr/local/include/libavutil/mathematics.h" #include (...)
• 08:07
  Can't load libavcodec.so in android - Tracy Wang Newest 'ffmpeg' Questions - Stack Overflow
  I can't load libavcodec.so in the android project, the log says dlopen failed: cannot locate symbol "ff_vp9_copy32_aarch64" referenced by "/data/app/com..-1/lib/arm64/libavcodec.so"..., the ffmpeg version is 4.2.4.
• 07:45
  FFmpeg Question: Proper Format to use when no transition is being used? - HHH-Messenger Newest 'ffmpeg' Questions - Stack Overflow
  I can NOT fine any examples so can someone point me in the right direction please. I have many images with to short duration time to add transitions, and would like to know what the proper syntax and format is, for a text file? Would only the images with transitions be indexed, or all of them? Also if my files are located in the directory C:\\temp\\ what does the text file look like below? $ ffmpeg \\ -loop 1 -t 1.4 -i 001.jpg \\ (no fade in or out) -loop 1 -t 1.65 -i 002.jpg \\ (no fade in or out) -loop 1 -t 1.9 -i 003.jpg \\ (no fade in or out) -loop 1 -t (...)
• 04:18
  i have to list all images,backgrounds, layers etc inside my video as json file using ffmpeg - Awele studio Newest 'ffmpeg' Questions - Stack Overflow
  Please tell me the ffmpeg cammand line code to get information of mp4 file in json format. i want details of video(in mp4) to json format. The details include images, layers , background, audio information etc just as shown in code below.(The output is show below i need input command line code).Thanks in advance "images":[ "name":"img_0.jpg", "w":540, "h":960, "prefix":[ "-i" ], "postfix":[ ] , "name":"img_1.jpg", "w":540, "h":960, "prefix":[ "-i" ], "postfix":[  (...)
• 01:43
  FFmpeg starting manually but not with Systemd on boot - eKrajnak Newest 'ffmpeg' Questions - Stack Overflow
  On Raspberry Pi 4 B 4GB with official Debian 10 image, I have /home/pi/run.sh script with following: #!/bin/bash ffmpeg -nostdin -framerate 15 -video_size 1280x720 -input_format yuyv422 -i /dev/video0 -f alsa -i hw:Device \\ -af acompressor=threshold=-14dB:ratio=9:attack=10:release=1000 -c:a aac -ac 2 -ar 48000 -ab 160k \\ -c:v libx264 -pix_fmt yuv420p -b:v 3M -bf 1 -g 20 -flags +ilme+ildct -preset ultrafast \\ -streamid 0:0x101 -streamid 1:0x100 -mpegts_pmt_start_pid 4096 -mpegts_start_pid 0x259 -metadata:s:a:0 language="" -mpegts_service_id 131 (...)

22 June

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 23:42
  FFMPEG: How to combine video and image (video template) - clo5ure Newest 'ffmpeg' Questions - Stack Overflow
  Goal I have a video and an image (a template for the video) that I'm trying to combine into one output video (1080w x 1920h - 9:16 aspect ratio). Input video - 1920x1080 Input image - 1080x1920 Output video - 1080x1920 This image shows what I'm trying to accomplish. The two orange sections are the input image - it's a single .png with a transparent section in the middle for the video. As mentioned in the title, I'm trying to accomplish this using FFMPEG. More specifically, I'm using the fluent-ffmpeg npm package. Current (...) -- This image, fluent-ffmpeg
• 22:49
  Can I stream live audio with libav? - szymek349 Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to code simple internet radio streaming app in C using libav/ffmpeg, however the only thing I can do is open the url and download packets. When I send it to alsa soundcard I get noise and statics for a second and then alsa buffer xrun. I was trying to decode the packets into frames and they seemed ok. I had seen https://gavv.github.io/articles/decode-play/ , https://www.ffmpeg.org/doxygen/3.2/group__lavf__encoding.html#details , https://github.com/leandromoreira/ffmpeg-libav-tutorial and many pages on https://ffmpeg.org/doxygen/trunk/index.html but I can't (...) -- https://gavv.github.io/articles/decode-play/, https://www.ffmpeg.org/doxygen/3.2/group__lavf__encoding.html#details, https://github.com/leandromoreira/ffmpeg-libav-tutorial, https://ffmpeg.org/doxygen/trunk/index.html
• 22:13
  Why is my discord bot not able to find the file that is there when I open the folder manually? - Toma Newest 'ffmpeg' Questions - Stack Overflow
  I made a discord bot that should play music using ffmpeg. It's connecting and downloading the youtube webm file after which it should convert and rename it to song.mp3 but it doesn't manage to do so. I check the folder and the error message doesn't match what I see - the file is there and has been renamed. Am I using the replace command correctly to move the file? I'd note that I'm using windows10 and that the folders are all read only and that although I'm the admin I can't change that no matter what I do (I guess it's a win10 (...)
• 21:54
  Problem recording RTP from mediasoup router using ffmpeg - Scramjet Newest 'ffmpeg' Questions - Stack Overflow
  I have a mediasoup server setup where I now need recording feature. To accomplish this I am doing the following - On getting the event to start recording I call this function : async handleStartRecording(peer, router) let transports = [], consumers = [], ffmpegInput = ; for(let entry of peer.producers.entries()) const rtpTransport = await router.createPlainTransport( comedia: false, rtcpMux: false, listenIp: ip: '127.0.0.1', announcedIp: null ); transports.push(rtpTransport); const port = (...)
• 21:22
  Why does my discord bot not able to find the file that is there when I open the folder manually? - Toma Newest 'ffmpeg' Questions - Stack Overflow
  I made a discord bot that should play music using ffmpeg. It's connecting and downloading the youtube webm file after which it should convert and rename it to song.mp3 but it doesn't manage to do so. I check the folder and the error message doesn't match what I see - the file is there and has been renamed. Am I using the replace command correctly to move the file? I'd note that I'm using windows10 and that the folders are all read only and that although I'm the admin I can't change that no matter what I do (I guess it's a win10 (...)
• 21:17
  How FFmpeg multi-threaded download ts segment in m3u8 file? - xichun lin Newest 'ffmpeg' Questions - Stack Overflow
  I am using ffmpeg to download the ts in the m3u8 file and merge them into an mp4 file，Use the following command line： ffmpeg -i -c copy target.mp4 Although it can work, but I found the download speed is very slow, bandwidth utilization is very low, so I would like to know if ffmpeg can be set to multi-threaded download to speed up the download speed?
• 21:00
  Getting issue in command prompt while executing FFmpeg command because of exceeded string limit.(Windows) - John Smith Newest 'ffmpeg' Questions - Stack Overflow
  This is the command that I want to execute but it exceeds the string limit of command in COMMAND PROMPT of WINDOWS. Please help me by correcting my ffmpeg command or suggesting me some solution so that I can compress my ffmpeg command that does not exceed the command string limit. I am setting an overlay of images on video, that is 25 frames/second. Every image overlay changes every 40ms and user see a text animation on video. I have tried other options such as making a gif from sequence of images but when the gif is created then a background colour is added (even though the (...) --
• 19:02
  Pydub wont find ffmpeg/ffprobe on "portable" installation - Lukas Neumann Newest 'ffmpeg' Questions - Stack Overflow
  Basically what im trying to achive is, having a ffprobe/ffmpeg in a static folder that is not in the PATH. What ive tried to do: pydub.AudioSegment.converter = "C:\\\\xxx\\\\ffmpeg.exe" pydub.AudioSegment.ffprobe = "C:\\\\xxx\\\\ffprobe.exe" myfile = Path("C:\\\\xxx\\\\sample.mp3") print(os.path.isfile(myfile)) #True But now, sound = pydub.AudioSegment.from_mp3(myfile) Still outputs: Couldn't find ffprobe or avprobe - defaulting to ffprobe, but may not work FileNotFoundError: [WinError 2] The system cannot find the file specified  (...)
• 15:45
  Codec 'mpeg4' (12) is not supported by the bitstream filter 'h264_mp4toannexb - Karan Newest 'ffmpeg' Questions - Stack Overflow
  rohitⓐrohit:~/Desktop/hyland$ ffmpeg -y -i sample.mov -codec copy -bsf h264_mp4toannexb -map 0 -f segment -segment_time 5 -segment_format mpegts -segment_list "segments/prog_index.m3u8" -segment_list_type m3u8 segments/fileSequence%d.ts ffmpeg version n4.3.1 Copyright (c) 2000-2020 the FFmpeg developers built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04) configuration: --prefix= --prefix=/usr --disable-debug --disable-doc --disable-static --enable-cuda --enable-cuda-sdk --enable-cuvid --enable-libdrm --enable-ffplay --enable-gnutls --enable-gpl --enable-libass --enable-libfdk-aac (...)
• 13:47
  Video compression in react native using ffmpeg - Shahanshah Alam Newest 'ffmpeg' Questions - Stack Overflow
  I trying to compress video in react native using react-native-ffmpeg . I am picking video using react-native-image-picker. I tried using command -y -i $inputVideo -vcodec h264 -acodec mp3 $finalVideo. But it is failing with rc:1. My code:- RNFFmpeg.execute( str_cmd, ).then((result) => if (result.rc === 0) console.log("successfully compressed"); else console.log("error",result); )  (...) -- react-native-ffmpeg, react-native-image-picker
• 12:52
  How to add mp3 inbetween mp3 with ffmpeg [closed] - user2194805 Newest 'ffmpeg' Questions - Stack Overflow
  I've 2 mp3 files. a.mp3 is 1000 seconds long and b.mp3 is 10 seconds long. I'd like to add b.mp3 to a.mp3 starting from 50s seconds. How can I achieve it with FFmpeg? Is there any simple command-line option for that?
• 11:43
  ffmpeg hardcode subtitles, no subtitles but no output error - Rafael Castelo Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to hardcode subtitles on an mp4 files using an external SRT subtitles file. Despite getting a succesful result as output: video:3923kB audio:975kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.344595% [libx264 ⓐ 0x63b08c0] frame I:9 Avg QP:15.65 size: 31298 [libx264 ⓐ 0x63b08c0] frame P:609 Avg QP:20.37 size: 4283 [libx264 ⓐ 0x63b08c0] frame B:1242 Avg QP:23.74 size: 907 [libx264 ⓐ 0x63b08c0] consecutive B-frames: 3.3% 15.4% 23.1% 58.3% [libx264 ⓐ 0x63b08c0] mb I I16..4: 21.5% 54.0% 24.5% [libx264 ⓐ 0x63b08c0] mb P (...)
• 11:19
  cutting video using ffmpeg cannot produce videos with specified length - david Newest 'ffmpeg' Questions - Stack Overflow
  I have some mp4 videos and I want to split them into 2-second videos. my GOP is 2 Sec. for this aim I use the following command: ffmpeg -i input.mp4 -c copy -map 0 -segment_time 00:00:02 -f segment -reset_timestamps 1 output%03d.mp4 but after splitting, my new videos have different duration times. some of them are 4 Sec, one of them is 3.67 Sec. why the duration time is different from the thing I specified in command? my command is wrong? is it possible to split based on frame number? for example each 120 (...)
• 11:02
  ffmpeg / avconv on ubuntu invalid data found when processing input - user3453357 Newest 'ffmpeg' Questions - Stack Overflow
  I have a .mp4 (h264) file on my ubuntu and try to rotate it using avconv (or ffmpeg, the result is the same). Actually, whatever action I'm trying to do with the file I get the "filename: invalid data found when processing input" The interesting thing is when I try to rotate the same file using ffmpeg library on windows, it runs smoothly. Below is the actual command that runs on windows, but doesn't run on ubuntu ffmpeg -i inputFile.mp4 -vf transpose=1 outputFile.mp4 Any help is appreciated, Thank you  (...)
• 10:25
  Why JPEG compressing an uncompressed image differs its original (FFmpeg, NvJPEG, ...) - Fruchtzwerg Newest 'ffmpeg' Questions - Stack Overflow
  I am currently struggling to understand why recompressing an uncompressed JPEG image differs its original. It's clear, that JPEG is a lossy compression, but what if the image to compress is already uncompressed, which means all sampling losses are already included? In other words: Downsampling and DCT should be inversable at this point without loosing data. To make sure losses are not effected by the color space conversion, this step is skipped and YUV images are used. Compress YUV image to JPEG (image.yuv --> image.yuv.jpg) Uncompress JPEG image to YUV (...) -- , Lossless Chroma Subampling, Nvidias jpeg samples, NvJPEGEncoder
• 08:13
  Change Audio Pitch with Audio Speed Ffmpeg - Vivek Thummar Newest 'ffmpeg' Questions - Stack Overflow
  i'm using Ffmpeg to change Audio Pitch and Speed and here's some command i'm trying: ffmpeg -i audioPath -filter:a atempo=audioSpeed,asetrate=audioPitch -ar sampleRate -b:a xValue(k) output.mp3 ffmpeg -i audioPath -filter:a atempo=(audioSpeed / audioPitch),asetrate=(sampleRate * audioPitch),aresample=sampleRate and i tried some more commands also with little bit of changes. (here audioSpeed and audioPitch are in range of 0.5 to 2.0, sampleRate is between 8000 to 48000 and bitRate is between range of 96k to 320k) Now let's (...)
• 00:22
  FFMPEG unexpected behavior inside nodejs Lambda function - Rafael Castelo Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to burn subtitles into a video using FFMPEG. I'm working within a serverless lambda architecture, and we've used FFMPEG with lambda by using layers before and everything worked okay. Now I'm trying to burn subtitles inside a video using the following command: ffmpeg -i https://some-bucket.s3.region.amazonaws.com/my-video.mp4 -f mp4 -vf subtitles=sub.srt subtitled-video.mp4 The issue is, that command works perfectly inside my local machine or any other instance I try. However inside my lambda function, I just get the original video without (...)
• 00:17
  ffmpeg not able to open file. I/O error when attempting command - J. Carpenter Newest 'ffmpeg' Questions - Stack Overflow
  Can't seem to get ffmpeg to generate a video thumbnail! command being used: ffmpeg -i input.mp4 -ss 00:00:01.000 -vframes 1 output.png error: [image2 ⓐ 0000023199ddf440] Could not open file : output.pngN/A speed= 0x av_interleaved_write_frame(): I/O error frame= 1 fps=0.4 q=-0.0 Lsize=N/A time=00:00:00.03 bitrate=N/A speed=0.0119x video:115kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown Conversion (...)

21 June

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 21:40
  Legal issues in shipping apps based on Electron framework (libffmpeg) - Manmohan Singh Newest 'ffmpeg' Questions - Stack Overflow
  We're in the process of building and deploying a desktop based app on electron v 12.0.7. It'll be a (free) commercial software deployed to ~2-3M users worldwide. Recently our legal team enquired about the proprietary codecs bundled with chromium and I thought the best way to confirm this would be to reach out here. So, here're specific things that I need help with: Are we shipping chromium with proprietary codecs? If yes, what are potentially contentious codecs that come by default in chromium bundled with electron v 12.0.7? Is there any (...) -- https://github.com/electron/electron/releases/download/v12.0.7/ffmpeg-v12.0.7-darwin-arm64.zip
• 21:04
  FMP4 moof box sequence number ordering - Daniel Newest 'ffmpeg' Questions - Stack Overflow
  I wanted to do a basic fragmented mp4 broadcast program with avformat libs and HTML5 video and MSE. This is a live stream and I use avformat to copy h264 data to mp4 fragments. Here is my basic drawing of clients attaching to the stream: So, with words: C1J: First Client joins: avformat process starts ftyp, moov, moof, mdat boxes will be served to Client1 ftyp and moov atoms are both saved for later reuse C2J: Second Client joins (later in time): avformat process is ongoing (because it is (...) --
• 19:06
  ffmpeg 2 pass encoding- understand the statistics in the output .log file - Yaelvi Newest 'ffmpeg' Questions - Stack Overflow
  I am using 2 pass encoder to encode my input video with a target bitrate. I want to get the encoder (x264) statistics from the first pass- these statistics are written to ffmpeg2pass.log the output for each frame looks like that: in:2 out:2 type:B dur:2 cpbdur:2 q:28.41 aq:25.07 tex:4721 mv:2357 misc:2266 imb:24 pmb:527 smb:3049 d:- ref:0 ; How can I found is the meaning of each value? (for example, mv is motion vectors, but what is the meaning of misc, imb, pmb etc.?) ffmpeg command used: ffmpeg -f rawvideo -pix_fmt yuv422p16le -s:v 1280x720 -i "input_file.yuv" (...)
• 17:08
  How to apply zoompan filter on GIF using FFMPEG - Pradeep Kumar Newest 'ffmpeg' Questions - Stack Overflow
  I am creating a video using images with audio length using FFMPEG. In which i have following inputs a background image, a overlay gif, text overlay png file and a watermark png image. I want to add a zoom in out animation effect on overlay.gif file. The animation effect is working fine But the GIF is not working as expected, it is showing as an image. This is working fine with the jpeg/png file. How can i achieve this so GIF is working as expected? I am using below command. This command also change the shape of the GIF. ffmpeg (...)
• 16:19
  Convert HEVC/H.265 video to a more widely supported format using fluent-ffmpeg in Node.js - Daniel Loiterton Newest 'ffmpeg' Questions - Stack Overflow
  My app allows users to upload videos from their phones. However, the latest iPhone default format (HEVC / H.265) does not seem to be supported by Chrome and other browsers, so some users cannot stream the videos. I'm already using fluent-ffmpeg on my Node.js backend to read metadata and extract thumbnails from the uploaded videos. How would I go about converting HEVC videos to something else? What format/options would be appropriate for streaming to browsers? Ideally I'd like to keep files fairly small, and I'm willing to sacrifice some quality to that (...) -- supported
• 16:16
  Libtool library used but `LIBTOOL' is undefined? - Sam Healey Newest 'ffmpeg' Questions - Stack Overflow
  Im trying to install ffmpeg on my server. Im unsing centos 5. When I try to install libfdk_aac I get the following error ` autoreconf: Entering directory `.' autoreconf: configure.ac: not using Gettext autoreconf: running: aclocal --force -I m4 autoreconf: configure.ac: tracing autoreconf: configure.ac: not using Libtool autoreconf: running: /usr/bin/autoconf --force autoreconf: configure.ac: not using Autoheader autoreconf: running: automake --add-missing --copy --force-missing Makefile.am:31: Libtool library used but `LIBTOOL' (...)
• 15:02
  Android Video Slideshow from images doesn't use more then 3 images - Aleksakb24 Newest 'ffmpeg' Questions - Stack Overflow
  There is a problem while creating a Video Slideshow from images on Android. It works good for up to 3 images, but if I select more, it only creates for the first 3. I set the slide duration to be 5 seconds, so if I select 2 images there are 2 slides and 10 second video, if I select 3 images there are 3 slides and 15 second video, but if I select 4 or more images there are once again 3 slides and 15 second video with the first 3 images. This is my code: private fun generateFFmpegCommandForSlideshow(outputFile: File):String val cmd = "-y $getInputImagesCommand()-filter_complex (...) -- https://github.com/tanersener/ffmpeg-kit
• 15:00
  Convert HEVC video to a more widely supported format using fluent-ffmpeg in Node.js - Daniel Loiterton Newest 'ffmpeg' Questions - Stack Overflow
  My app allows users to upload videos from their phones. However, the latest iPhone default format (HEVC / H.265) does not seem to be supported by Chrome and other browsers, so some users cannot stream the videos. I'm already using fluent-ffmpeg on my Node.js backend to read metadata and extract thumbnails from the uploaded videos. How would I go about converting HEVC videos to something else? What format/options would be appropriate for streaming to browsers? Ideally I'd like to keep files fairly small, and I'm willing to sacrifice some quality to that (...)
• 14:47
  Capture & save MJPG CCTV stream to file w. FFMPEG - GBano Newest 'ffmpeg' Questions - Stack Overflow
  I've been trying to record an IP-cam stream (Foscam, mjpg) via http with ffmpeg. Can't get the rtsp stream for some reason, but the http/mjpg works fine (VLC IDed it as mjpg). The stream URL looks like this: http://192.168.1.123:456/videostream.cgi?user=USERNAME&pwd=PWD So I created the string (w.o line wrap): ffmpeg -i -loglevel debug http://192.168.1.123:456/videostream.cgi?user=USERNAME&pwd=PWD /home/user/Videos/camera.mp4 Some examples I saw are using -c copy and map 0 options as well but I left this out since I defined source and (...)
• 14:29
  Concat Demuxer in FFMPEG Autogen - JunaidAmjad Newest 'ffmpeg' Questions - Stack Overflow
  Is there option available for Concat Demuxer in FFMPEG.Autogen library. I tested it in FFMPEG and it works well through the here -- here
• 13:46
  How do you properly mux an mp4 file with FFmpeg 4? - TheNeuronalCoder Newest 'ffmpeg' Questions - Stack Overflow
  How do you properly mux an mp4 file with FFmpeg 4? I have an issue with the time base, I'm pretty sure. Using ffprobe, I found encoding 24 frames for a 24 FPS output video which should theoretically produce a 1-second video, instead produces a 4 millisecond, 142.61 FPS video with a bitrate 157326 kb/s. I have been stuck on this for months. What's the issue? How do I fix this? void Camera::Encode(Frame frame) if (av_frame_make_writable(frame_) data = frame.data; frame_->pts += av_rescale_q(1, context_->time_base, stream_->time_base); if (...)
• 08:14
  ffpmeg loop background music in audio file and add fadeout - Javed Saifi Newest 'ffmpeg' Questions - Stack Overflow
  I have 2 files one is voice.mp3 and the second is background.mp3 currently I'm adding background music in voice.mp3 below is the command. ffmpeg -i voice.mp3 -i background.mp3 -filter_complex "[0]volume=1.0[a],[1]volume=0.5[b];[a][b]amix=duration=shortest" -ac 2 -c:a libmp3lame -q:a 4 output.mp3 -y What I want to achieve is. loop background.mp3 if it is shorter than voice.mp3 duration if background.mp3 duration is greater than voice.mp3 then use duration shortest. fadeout (...)
• 08:01
  Exit FFMPEG when a line freezes - user15966041 Newest 'ffmpeg' Questions - Stack Overflow
  I have a ffmpeg bat file for retrieving streams through rtsp bat file ffmpeg -xerror -loglevel error -stimeout 1111111 -rtsp_transport tcp -v verbose -i "rtsp://admin:admin1234ⓐ10.8.0.14:81/cam/realmonitor?channel=1&subtype=1 " -vf scale=1024:576 -vcodec libx264 -sc_threshold 0 -f hls -hls_flags delete_segments -hls_time 2 -segment_time 2 -hls_list_size 2 C:\\Apache24\\htdocs\\smartmine\\ipcam\\video_1\\stream.m3u8 The problem im facing is that, after ffmpeg had run for a few hours, the speed decreases and the processing of the video stops and stays on that (...) --
• 05:42
  using FFmpeg for cutting the video as the same length as GOP length [closed] - david Newest 'ffmpeg' Questions - Stack Overflow
  I have some mp4 video files and I need to split them into smaller sizes with time length as the same as GOP. my GOP is 2 sec. I encode my videos using the following command: ffmpeg -i input_1080p60.mp4 -c:v libx264 -pix_fmt yuv420p -b:v 8000K -bufsize 8000K -minrate 8000K -maxrate 8000K -x264opts keyint=120:min-keyint=120 -preset veryfast -profile:v high out_1080p.mp4 now I need to split them into some videos with a time length of 2 sec. I used the following command but the length of produced videos is 4 sec or some time 3 sec, although I set the segment time equal 2 (...)
• 05:05
  ffplay v3.4.1: Could not initialize SDL - No available video device - iorih0304 Newest 'ffmpeg' Questions - Stack Overflow
  My linux distribution is Ubuntu 20.04 server, and ffplay is compiled from ffmpeg v3.4.1 source code. I use the command ffplay -f rawvideo -video_size 1920x1080 -i BasketballDrive_1920x1080_50.yuv or Display=:0 ffplay -f rawvideo -video_size 1920x1080 -i BasketballDrive_1920x1080_50.yuv But it displays failed, the message shows: ffplay version 3.4.1 Copyright (c) 2003-2017 the FFmpeg developers built with gcc 9 (Ubuntu 9.3.0-17ubuntu1~20.04) configuration: --enable-shared --enable-nonfree --enable-ffplay libavutil 55. 78.100 / 55. (...)
• 04:49
  ffmpeg hwaccel no decoder surfaces left - desperateLord Newest 'ffmpeg' Questions - Stack Overflow
  Recently I compiled natively the latest version of ffmpeg 4.3 on Windows 10 amd64. Evironment:CUDA11.0, NASM, VS2019, MYSY2 with mingw64. I also used the patch https://trac.ffmpeg.org/attachment/ticket/9019/0001-Patch-for-ticket-9019-CUDA-Compile-Broken-Using-MSVC.patch Compile featrues were: --enable-nonfree --enable-cuda-nvcc --enable-libnpp --enable-gpl --enable-libx264 --enable-cuda-llvm --enable-nvenc --toolchain=msvc --extra-cflags=-I../nv_sdk --extra-ldflags=-libpath:../nv_sdk I tested ffmpeg for cuda acceleration. the CPU is an AMD 3500x. the GPU is (...) -- https://trac.ffmpeg.org/attachment/ticket/9019/0001-Patch-for-ticket-9019-CUDA-Compile-Broken-Using-MSVC.patch
• 02:08
  Repl.it and FFmpeg - user12238231 Newest 'ffmpeg' Questions - Stack Overflow
  Hi I am building a discord bot and would like to use ffmpeg in it but am working on repl.it. How can I use ffmpeg on repl.it if I can? This is for translating a .webm file into an .mp4 file, running on python 3.7.4. I have had a look on the repl.it forums and on Stack Overflow but cannot find any information. Thanks! -- repl.it
• 03:12
  ffmpeg scale not woking as expected it adds weird lines - Jintor Newest 'ffmpeg' Questions - Stack Overflow
  When I encode without scalling, all is ok, but when I add this vf "-2:1080" or -vf "scale=1920:1080:force_original_aspect_ratio=decrease,pad=1920:1080:(ow-iw)/2:(oh-ih)/2,setsar=1" I GET THIS : if I add w3fdif or format rgba like -vf "w3fdif,format=rgba.... i GET THIS why and how to fix this ? I tried with different .mov, .mkv -- , ,
• 00:02
  FFMPEG Commands is not working on Android 10 - Zain Newest 'ffmpeg' Questions - Stack Overflow
  I am working on an android app applying video effects like slow and fast motions. My app is working fine below android 10, but not on android 10 and FFMPEG is not showing any error just blank error message on the onFailure callback method. I did some research and find out that android has introduced scoped permissions and you can temporarily bypass this by adding this line on manifest android:requestLegacyExternalStorage="true" and you get the storage permission. After adding this line rest portation of app is just working fine fetching user videos and etc but FFMPEG is not (...)

20 June

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 15:34
  How to take a picture from m3u8 by using FFmpeg [closed] - Lemove Newest 'ffmpeg' Questions - Stack Overflow
  I want to download the picture from the live video. This live video using m3u8.
• 16:25
  Extract frames with ffmpeg - command [closed] - liran Newest 'ffmpeg' Questions - Stack Overflow
  i try to extract frames from video and i found this command: $"-ss 00:00:01 -t 00:00:06 -i videoPath -r 5.0 resultFolderPath\\\\%4d.jpg" who can explain my this command? If for example I want to extract frames from video length of 30 seconds with 60 fps so the expected result is 1800 frames. how can I use this command on this way?
• 23:28
  FFMPEG encoder:Application provided invalid, non monotonically increasing dts to muxer in stream - Michael IV Newest 'ffmpeg' Questions - Stack Overflow
  I am encoding video with h264 codec and mp4 container. The source is a sequence of images I load from memory. The encoding seems to be working good. I am able to verify the exact amount of frames encoded, but what bugs me is the following warning/error I am getting at the end of the session from the muxer in terminal: Application provided invalid, non monotonically increasing dts to muxer in stream 0: I tried different techniques to calculate pts/dts and it is the same. I did notice though, that avcodec_receive_packet() sometimes returns packets out of order,so may (...)
• 21:20
  how to use ffmpeg with gpu support on macos - Soroush Tayyebi Newest 'ffmpeg' Questions - Stack Overflow
  when i exec ffmpeg command, it use my cpu to render videos, it take long time to do this job, how i can force ffmpeg use my gpu to render? i have a mac os with AMD Radeon R9 M370X 2048 MB Graphic card. what i must install and what command i must use for this work? i use this commands when my script run: $source_decoder = "ffmpeg -i $film_aval_source -vf drawtext=\\"text_shaping=1:fontfile=$font_source: text='$esme_film': fontcolor=black: fontsize=$font_size: box=1: boxcolor=blackⓐ0: boxborderw=0: x=(w-text_w)/2: y=(h-text_h)/2 (...)
• 20:53
  How to create gstreamer plugin for identifying private stream in mpeg2ts? - kumar Newest 'ffmpeg' Questions - Stack Overflow
  I am sending some vendor-specific information in the PES packet with a private stream type of 0xBD. I am packetizing this into a new TS Packet PID. How can I demux this packet and use that data on the GStreamer decoding side?
• 20:23
  Inconsistent libx264 I-frame interval. Why? - Alexander Newest 'ffmpeg' Questions - Stack Overflow
  Why is the I-frame interval in some cases inconsistent despite of defyning it as a fixed value? I'm using ffmpeg and the below command, while the I-frame coded_picture_number goes as follows: 0 10 20 30 38 47 57 ... 196 206 215 225 235 245 255 ffmpeg -i football.y4m -c:v libx264 -bf 0 -g 10 football.mp4 The video data in question is footbal (b) at xiph.org -- footbal (b) at xiph.org
• 19:45
  Does file size of an encoded video scales proportionally with FPS if a video is encoded in H265? - user482594 Newest 'ffmpeg' Questions - Stack Overflow
  If I encode a raw 60fps video with an H.265 encoder, one with 30 fps and the other with 60fps, would the file size of a 60fps encoded video be as twice as big as 30fps H.265 video? (assuming all other parameters are the same. e.g. Same CRF/twopass parameters) In other words, if I happen to encode the same source video with 10 fps, would the outcome encoded video has about 1/6 the file size of 60 fps encoded video?
• 16:42
  ffmpeg - less frames getting extracted than expected - Vrajesh Doshi Newest 'ffmpeg' Questions - Stack Overflow
  ffmpeg -i instagram.mp4 -vf fps=29.97 thumb%06d.jpg -hide_banner Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'instagram.mp4': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 encoder : Lavf55.19.104 Duration: 00:00:13.61, start: 0.000000, bitrate: 1163 kb/s Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x640 [SAR 1:1 DAR 1:1], 1099 kb/s, 29.97 fps, 29.97 tbr, 11988 tbn, 59.94 tbc (default) Metadata: handler_name : VideoHandler Stream #0:1(und): (...)
• 05:11
  How to render AVSubtitle with libavfilter [closed] - ho229 Newest 'ffmpeg' Questions - Stack Overflow
  I want to render AVSubtitle(Bitmap) on AVFrame(YUV420) and I want to use avfilter to render, how to do it
• 14:08
  How to specify MPEG-DASH adaptation sets in FFmpeg, when using optional output audio and subtitle streams? - Sebsii Newest 'ffmpeg' Questions - Stack Overflow
  I am using the script below to transform videos to MPEG-DASH compliant ones. I want also to be able to process video that have no audio and/or no subtitles. Because of that I marked the streams for audio and subtitles with a ? at the end of the stream specifier, f.e. -map a:0?. Now when I want to specify the adaptation sets I can set it for the video and audio streams with id=0,streams=v and id=1,streams=a, but I can not select the subtitle streams, like I would want to with id=2,streams=s, as it is stated in the docs ("To map all video (or audio) streams to an AdaptationSet, "v" (or (...) -- docs
• 14:06
  Python script and equivalent command do not run the same - user32882 Newest 'ffmpeg' Questions - Stack Overflow
  I would like to use youtubedl to download the audio from a YouTube video into an mp3 file. I came up with the following command to do so: youtube-dl -x --audio-format mp3 https://www.youtube.com/watch?v=SF8DGbfOFig&ab_channel=derang When I run the above command through my command line, it seems that I successfully manage to download the file in mp3 format: [youtube] SF8DGbfOFig: Downloading webpage [download] Destination: Total Science & S.P.Y - Piano Funk (Ft. Riya & DāM FunK) [320k]-SF8DGbfOFig.webm [download] 100% of 5.57MiB in 00:03 [ffmpeg] (...)
• 13:07
  app file results error while executable runs alright on macos - newpy Newest 'ffmpeg' Questions - Stack Overflow
  I made a python/kivy app in which I use subprocess running a ffmpeg command, then built it by pyinstaller successfully. Environment: MacOS 11.3.1, python 3.9.5, kivy 2.0, ffmpeg 4.4 However, there are some running scenarios as follows: Start by double click executable file --> OK Start from terminal by: open myapp.app --> OK Start by double click myapp.app (or via Launchpad) --> ERROR About the error, I am pretty sure the error comes from the statement: process = subprocess.run(['ffmpeg', '-i', self.sound_file_path, (...)
• 11:05
  FFmpeg - video frame cropped after rotating video? - Md Yeamin Newest 'ffmpeg' Questions - Stack Overflow
  I am using following command to rotate video: ffmpeg -i input.mp4 -c:v h264 -vf rotate=PI/2 -c:a copy output.mp4 After processing the video, the frame get cropped. Please see the attached screenshot of the video for reference. Screenshot of original video Screenshot of rotated video -- ,
• 10:46
  ffmpeg RTSP Streaming record error (concealing error) - Sanggun Newest 'ffmpeg' Questions - Stack Overflow
  i already use below command to record my rtsp video ffmpeg -i rtsp:my_address -vcodec copy -r 60 -t 30 -y ch1.mp4 i hope to record my rtsp video every 1 hour. So i tried below code import os import datetime file_name = str(datetime.datetime.now())[:-10] +".mp4" while(1): os.system("ffmpeg -i rtsp:my_address:554/ch1/stream1 -vcodec copy -r 60 -t 30 -y "+file_name) print("done") To stop that program, i used ctrl+c. But that process was not stop. So i just turn off that terminal. after that, when i try same (...)
• 09:48
  ffmpeg can't record Webview Edge in window form - Sôn Gô Ku Newest 'ffmpeg' Questions - Stack Overflow
  I have a window form application with browser control is Webview Edge as link bellow: https://docs.microsoft.com/en-us/microsoft-edge/webview2/get-started/winforms This command use for record tab: ffmpeg -f gdigrab -framerate 60 -i title="xo" -y -b:v 10M a.mp4 p\\s: "xo" is window form title But after record, video doesn't have webview control Please see attached image Please help me this case. Thank you so much! -- https://docs.microsoft.com/en-us/microsoft-edge/webview2/get-started/winforms, Please see attached image
• 04:09
  ffmpeg command executes via command line, but not via PHP script - Mihail Minkov Newest 'ffmpeg' Questions - Stack Overflow
  I am working on a simple video upload and compression system and I am currently using the following process. First Step I use a multipart/form-data to upload the original video file, which I store in /var/www/site/videos_pre/video.mp4. My public folder is var/www/site/public_html/. I store an entry in my database with the video information. Second step I have a converter process which is very basic, but does the job (at least in CLI). It has the following code: public function converter($content_id) $content = (...)
• 02:59
  libav live transcode to SFML SoundStream, garbled and noise - William Lohan Newest 'ffmpeg' Questions - Stack Overflow
  I'm so close to have this working but playing with the output sample format or codec context doesn't seem to solve and don't know where to go from here. #include #include #include "MyAudioStream.h" extern "C" #include #include #include #include #include #include void setupInput(AVFormatContext *input_format_context, AVCodecContext **input_codec_context, const char *streamURL) // av_find_input_format("mp3"); avformat_open_input(&input_format_context, streamURL, NULL, NULL);  (...)
• 02:36
  Discord.py music_cog, bot joins channel but plays no sound - Ozzy Newest 'ffmpeg' Questions - Stack Overflow
  I have started using python a week ago or so. I have watched all the related videos on YT and checked google pages etc. But still no luck. My bot perfectly joins to the voice channel and when i use play it downloads and presumebly starts the play function but there is no sound or anything, it just joins and waits 1-2 mins then leaves with timeout error. from discord.ext import commands import logging from youtube_dl import YoutubeDL logging.basicConfig(level=logging.INFO) class music_cog(commands.Cog): def __init__(self, bot): self.bot = (...)

19 June

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 22:01
  Add audio (with an offset) to video with FFMPEG - slotishtype Newest 'ffmpeg' Questions - Stack Overflow
  I have a 10 minute video and a 50 minute audio mp3. The video starts at 500 seconds into the audio. Using FFMPEG, how can I add the the audio to the video but specify a 500 seconds audio offset (So that they sync up)? EDIT: Down the bottom of this page it suggests how to specify an offset. $ ffmpeg -i video_source -itsoffet delay -i audio_source -map 0:x -map 1:y ....... However, when I apply this, it still starts the audio from the (...) -- page
• 21:11
  Converting an AVFrame to QImage with conversion of pixel format - Théophane Newest 'ffmpeg' Questions - Stack Overflow
  I need to extract frames of videos to images in my QT application. I don't know in advance the pixel format of the source videos/frames (yuv, rgb...), But I need to obtain a reliable image pixel format such that I can consistently handle the images later. I'm using the ffmpeg libraries to get the frames, which are already decoded. I'm trying to avoid using deprecated functions, and I need to optimize for speed. I tried implementing this example: https://stackoverflow.com/a/42615610/7360943 which Converts the original frame to a rgb frame Creates (...) -- ,
• 20:43
  Creating a video from image files with ffmpeg without delay - Gal Newest 'ffmpeg' Questions - Stack Overflow
  How to create a video from images using ffmpeg without any time delay between frames? The command I use is: ffmpeg.exe -r .1 -f concat -i images.txt -c:v libx264 -pix_fmt yuv420p -r 30 NewVideo.mp4 -y I get a time delay of 10 seconds between each frame. Input Frame Rate - 0.1 frames per second = 1 image per 10 seconds and Output Video Frame Rate - 30fps. I want the video to play continuously with no delay at all, what command should I (...)
• 18:47
  A pragmatic strategy to merge multiple video files - saurav Newest 'ffmpeg' Questions - Stack Overflow
  I currently am working on recording a multiparty video conference which supports up to 6 participants. I am recording the conference using a media server and storing audio/video streams individually for every participant. Next, I need to merge those individual recordings into a single video file and upload it to a cloud storage like aws s3. For this I am considering 2 options, either Gstreamer or FFMPEG. I am leaning towards FFMPEG as I have used FFMPEG previously. I currently am playing with FFMPEG things like the hstack and vstack filters etc. Here is the FFMPEG command I (...) -- the full log link
• 14:43
  VLC/ffplay can't read some audiotracks created by ffmpeg - skanarr Newest 'ffmpeg' Questions - Stack Overflow
  I have two different .mkv files of the same movie. One contains the English, German, Italian, Spanish and French audio and subtitle tracks, the other contains Japanese Audio and Subtitle tracks. Since I want to have all tracks in one file I tried to 'merge' them using: $ ffmpeg -i "Assassin's Creed (2016).mkv" -i "./Other/Assassin's Creed_t13.mkv" -map 0:v -map 0:a -map 1:a:2 -map 0:s -map 1:s:1 -map 1:s:2 -map 1:s:3 -c:v copy -c:s copy -c:a copy tmp2.mkv Full Command Output from ffmpeg However playing it in VLC none of the Tracks from (...) -- Full Command Output from ffmpeg, All Message from VLC
• 09:33
  pyav / ffmpeg / libav access side data without decoding the video - user1315621 Newest 'ffmpeg' Questions - Stack Overflow
  Right now I am accessing the motion vectors in the following way: container = av.open( rtsp_url, 'r', options= 'rtsp_transport': 'tcp', 'stimeout': '5000000', 'max_delay': '5000000', ) stream = container.streams.video[0] codec_context = stream.codec_context codec_context.export_mvs = True for packet in container.demux(video=0): for video_frame in packet.decode(): motion_vectors_raw = (...)
• 07:32
  libav live transcode to SFML SoundStream, grabbled and noise - William Lohan Newest 'ffmpeg' Questions - Stack Overflow
  I'm so close to have this working but playing with the output sample format or codec context doesn't seem to solve and don't know where to go from here. #include #include #include "MyAudioStream.h" extern "C" #include #include #include #include #include #include void setupInput(AVFormatContext *input_format_context, AVCodecContext **input_codec_context, const char *streamURL) // av_find_input_format("mp3"); avformat_open_input(&input_format_context, streamURL, NULL, NULL);  (...)
• 06:47
  avformat_seek_file timestamps not using the correct time base - Charlie Newest 'ffmpeg' Questions - Stack Overflow
  I am in the process of creating a memory loader for ffmpeg to add more functionality. I have audio playing and working, but am having an issue with avformat_seek_file timestamps using the wrong format. avformat.avformat_seek_file(file.context, -1, 0, timestamp, timestamp, 0) From looking at the docs it says if the stream index is -1 that the time should be based on AV_TIME_BASE. When I load the file through avformat_open_input with a null AVFormatContext and a filename, this works as expected. However when I create my own AVIOContext and AVFormatContext through (...)

18 June

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 23:36
  Building ffmpeg libraries on windows - MisterSincere Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to compile ffmpeg library files (static preferred) for windows. I tried to use the msvc toolchain from within msys2, but configure always came back with an error related to cl.exe not being able to compile a test program. The most progress I made by using msys2 with mingw-w64-gcc, but from here on I've only generated executables, but no library files. I tried different configure options (i always use --enable-cross-compile). First I read that static is default and not shared, but the result of make was no lib file at all, just again the executable. So I additionally (...) -- here
• 23:31
  Legal issues regarding proprietary_codecs in Electron framework (libffmpeg) - Manmohan Singh Newest 'ffmpeg' Questions - Stack Overflow
  We're in the process of building and deploying a desktop based app on electron v 12.0.7. It'll be a (free) commercial software deployed to ~2-3M users worldwide. Recently our legal team enquired about the proprietary codecs bundled with chromium and I thought the best way to confirm this would be to reach out here. So, here're specific things that I need help with: Are we shipping chromium with proprietary codecs? If yes, what are potentially contentious codecs that come by default in chromium bundled with electron v 12.0.7? Is there any (...) -- https://github.com/electron/electron/releases/download/v12.0.7/ffmpeg-v12.0.7-darwin-arm64.zip
• 21:40
  Streaming to facebook rtmps gives TLS connection error - jdramer Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to stream to Facebook with ffmpeg. As of late 2019 the connection requirement is rtmps. Using the stock Debian Buster ffmpeg the TLS connection fails. FFMPEG Version ffmpeg version 4.1.6-1~deb10u1 Copyright (c) 2000-2020 the FFmpeg developers built with gcc 8 (Debian 8.3.0-6) configuration: --prefix=/usr --extra-version='1~deb10u1' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls (...)
• 20:27
  VLC cant read some audiotracks created by ffmpeg - skanarr Newest 'ffmpeg' Questions - Stack Overflow
  I have two different .mkv files of the same movie. One contains the English, German, Italian, Spanish and French audio and subtitle tracks, the other contains Japanese Audio and Subtitle tracks. Since I want to have all tracks in one file I tried to 'merge' them using ffmpeg. $ ffmpeg -i Movie.mkv -i Movie_jp.mkv -map 0:v -map 0:a -map 1:a:2 -map 0:s map 1:s:1 -map 1:s:2 -map 1:s:3 -c:v copy -c:a copy -c:s copy tmp.mkv Full Command Output from ffmpeg That is the command I used and even though it took a while, I got my tmp.mkv. However Playing it in VLC none (...) -- Full Command Output from ffmpeg, All Message from VLC
• 22:57
  ffmpeg code error in creating timelapse video from images - Ruiqing Wu Newest 'ffmpeg' Questions - Stack Overflow
  My codes below used to work: ffmpeg -y -framerate 25 -start_number 0 -i "a_%08d.jpg" -c:v libx264 -vf scale=-1:1500 -pix_fmt yuv420p d:\\mystars.mp4 But it now shows error in my new computer with error: [image2 ⓐ 000001ae31e2e600] Could find no file with path 'a_%08d.jpg' and index in the range 0-4 a_%08d.jpg: No such file or directory My images are under D:\\mystars. All are jpg files named from a__00000000.jpg to a__00000099.jpg. May I have some advice (...)
• 20:28
  make ffmpeg chose Nvidia CUDA over Intel QSV (Windows 10 with two video adapters) - Bart Lederman Newest 'ffmpeg' Questions - Stack Overflow
  I just set up a 'new' PC with built-in Intel video and an Nvida card: mostly to speed up video processing with ffmpeg and other programs. At first the built-in Intel was disabled, running only the Nvidia card. ffmpeg worked as expected, the CPU could be used for decoding and encoding. However: VirtualDub, a program I use frequently, has a problem with Nvidia cards (at least on Windows 10). The display gets screwed up, previews don't work, and all sorts of other problems occur. I tried all of the various discussion boards, and nobody has a good solution. (The problem is (...) -- https://github.com/FFmpeg/FFmpeg/commit/527a1e213167123d24d014bc0b956ef43d9d6542, https://docs.nvidia.com/video-technologies/video-codec-sdk/ffmpeg-with-nvidia-gpu/
• 17:52
  Generating silent audio using ffmpeg - Shikhar Jaiswal Newest 'ffmpeg' Questions - Stack Overflow
  Generating silent audio. Not adding silence, but to generate new audio with 1 second length with nothing but silence in it. I was using ffmpeg to perform the task, but it is not working. ffmpeg code- ffmpeg -f lafvi -i anullsrc=r=11025:cl=mono -t 1 -acodec aac out.mp3 The above command is not generating new silent mp3 file. Any suggestions? Thanks.
• 15:46
  using ffmpeg to convert a mkv or mp4 suitable for a DVD player that supports MPEG-4 / DivX - Neil Telford Newest 'ffmpeg' Questions - Stack Overflow
  I got a DVD Player with USB support. It is a recent player (DVD-225), but the documentation is sparse, but it does claim MPEG-4 and DivX support. Now, I have got certain AVI files to play via USB, but everything else fails. I looked at the metadata of an AVI file that worked via ffprobe, and got the following: Metadata: encoder : Lavf58.17.101 Duration: 00:58:30.94, start: 0.000000, bitrate: 1336 kb/s Stream #0:0: Video: mpeg4 (Simple Profile) (xvid / 0x64697678), yuv420p, 640x290 [SAR 1:1 DAR 64:29], 1196 kb/s, 23.98 fps, 23.98 tbr, 23.98 tbn, 23.98 tbc Stream (...)
• 11:56
  How to use FLUENT-FFMPEG uninterrupted push stream, continuous input, output - GiantKs Newest 'ffmpeg' Questions - Stack Overflow
  I want to try using various types of resource files, mp4,webm,stream, etc; For example, if I input VideoA, how to add a new video after the VideoA output is finished? I don't want any stalling at the viewing end, what do I do... code↓ let command = ffmpeg(); command.keepDAR() .input(bufferStream) .addOption('-vcodec', 'libx264') .addOption('-acodec', 'libmp3lame') .addOption('-aspect', '1280:720') .addOption('-f', 'flv') .on('end',()=>  (...)
• 11:42
  Getting "TypeError: must be real number, not NoneType" whenever trying to run write_videofile to a clip in moviepy - Sato Newest 'ffmpeg' Questions - Stack Overflow
  Example code: from moviepy.editor import * clip = VideoFileClip('video.mp4') clip.write_videofile('video2.mp4', fps=30) After showing the following messages, showing that the video is being built and written, Moviepy - Building video video2.mp4. Moviepy - Writing video video2.mp4 The following error message occurs: Traceback (most recent call last): File "", line 1, in File "C:\\Users\\User\\Anaconda3\\lib\\site-packages\\decorator.py", line 232, in fun return caller(func, *(extras + args), **kw) File (...)
• 11:00
  FFMPEG - bufsize formula - Data Newest 'ffmpeg' Questions - Stack Overflow
  Does anyone know what the formula is for bufsize along with the rate it checks in FFMPEG? I can't seem to find any concrete answer to this. Is it: bufsize = bitrate / rate ? And should it be using maxrate as opposed to bitrate in the calculation? Example on working out the rate at which the checks are done: bitrate: 700Kbps maxrate: 700Kbps bufsize: 70Kb 700Kbps/70Kb = 10 sec Is that right? To me that doesn't sound right because a smaller bufsize should be running the check at a higher rate and 10 seconds seems too (...)
• 12:42
  Regarding h264_nvenc encoding performance in ffmpeg - TONY Newest 'ffmpeg' Questions - Stack Overflow
  I use h264_nvenc in ffmpeg to transcode 1920*1080 60fps video to h264. My settings is like as below: m_h264Ctx->max_b_frames = 0; m_h264Ctx->has_b_frames = false; m_h264Ctx->gop_size = 2500; m_h264Ctx->bit_rate = 1024*1024*5; m_h264Ctx->rc_buffer_size = 1024*1024*80; m_h264Ctx->rc_max_rate = 1024*1024*10; av_dict_set(&param, "level", "auto", 0); av_dict_set(&param, "profile", "baseline", 0); av_dict_set(&param, "cbr", "0", 0); av_dict_set(&param, "rc", "vbr", 0); av_dict_set(&param, "preset", "llhp", (...)
• 09:55
  How to get native frame rate of vide with FFmpex? - Flame_Phoenix Newest 'ffmpeg' Questions - Stack Overflow
  Background I have an .mp4 video and I need to get the video's frame rate. Using ffmepg (in Linux) I know I can get this information via the following command: ffprobe -v 0 -of compact=p=0 -select_streams 0 -show_entries stream=r_frame_rate 'MyVideoFIle.mp4' Which returns: r_frame_rate=24000/1001 FFmpex Doing this in bash is fine, but what I really want is to use it in my Elixir application. To this end I found out about ffmpex. First I tried using FFprobe: > FFprobe.format("Devil May Cry 5 Bury the Light LITTLE V (...) -- ffmpex
• 08:57
  Input/output error sending RTMP to ffmpeg - greg Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to use the "re-stream" feature of Vimeo (i.e. Vimeo send an rtmp stream to me). When it tries to connect, I have this: Proto = rtmp, path = /src/live, app = src, fname = live Window acknowledgement size = 2500000 Deleting stream... Input/output error I cannot figure out what's wrong here... Any idea? Thanks in advance
• 07:18
  Automated Concatenate with FFMPEG Using Re-Encode - Sam OT Newest 'ffmpeg' Questions - Stack Overflow
  I would like to concaternate a fairly large list of videos using FFMPEG. The following answer from another question is highly relevant: https://stackoverflow.com/a/11175851/5065462. I explain below why it isn't sufficient for me. I'm using MP4 files. I am using Windows 10. I'd like to write a bat file with arguments. I'll then call this from either Command Prompt or PowerShell. I want to automate Option 1 https://stackoverflow.com/a/11175851/5065462 to take as input a txt (or similar) file containing the filepaths for the videos to (...)
• 06:55
  Using fluen-ffmpeg to overlay video on a video (at top left or right) - Ruthwik Reddy Newest 'ffmpeg' Questions - Stack Overflow
  So the title should make sense I want to overlay one video on another. It's getting confused at so many places with concatenating video it's not that, I want to do something like this : I am able to do this in normal ffmpeg using this command ffmpeg -i VideoB.mp4 -i VideoA.mp4 -map 0:0 -map 1:1 -vf "movie=VideoA.mp4, scale=400:-1 [inner]; [in][inner] overlay=0:0 [out]" VideoAinsideVideoBsoundA.mp4 I'm having trouble writing this in fluent-ffmpeg going through StackOverflow I found something like this but the issue here is it's treating (...) --
• 08:21
  How can one use ffmpeg to position a video exactly at a specific pixel position in jpeg? - Krishna Chebrolu Newest 'ffmpeg' Questions - Stack Overflow
  For example, there is a jpeg with dimensions 1900x1000 and it has a frame (a rectangle) with pixel coordinates 490x100 and 1400x500 a video with resolution 720p needs to be placed within this rectangle Could you pls share the ffmpeg command to concatenate the jpeg and video? I tried -hstack and -xstack filters. But, couldn't get the video inside the rectangle. TIA
• 08:10
  In python cv2, trying to use VideoCapture with a video that starts on a negative timestamp, won't fetch frames at the negative timestamp? - Anton Newest 'ffmpeg' Questions - Stack Overflow
  In python, if i get a video (that was clipped in way that shows a negative timestamp in a video player) (see example of problem here ffmpeg start_time is negative) when trying to read that video through python opencv, I don't know how to get the frames starting from the negative timestamp. Instead what happens is first frame is the one at 0:00 timestamp, and when a video is read, a couple of frames get skipped at the beginning. Code sample: cap = cv2.VideoCapture("video_with_negative_timestamp.mp4") print(int(cap.get(cv2.CAP_PROP_POS_FRAMES))) # == (...)
• 03:59
  Getting FFProbe Information With Python - Robin Hood Newest 'ffmpeg' Questions - Stack Overflow
  I've been attempting to figure this out for forever now (I'm new to programming) and I can't figure it out. I'm attempting to build a script that will test the file, and give me output from which I can get information like "Audio Format" that I can then put into the filename. However, I can't even get the script to return any file info. I've hit a wall at inserting an input file... So at this point I just need help getting it to spit out info based on the argvs I've thrown in. Hopefully I'll be able to figure out how to parse the (...)