23 October

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

• 19:14
  Videos which don't play in Firefox: How to detect and how to fix? - Max Williams Newest 'ffmpeg' Questions - Stack Overflow
  I have, as test cases, two mp4 videos: they seem to be encoded the same, but one works in Firefox and one doesn't: bad.mp4 (doesn't work) view download good.mp4 (does work) view download (NOTE - I thought that the "view" links above would open them using the browser's built-in player, but it looks like they use Dropbox's video player, which DOES work in firefox. So, to see it in firefox, download it and then drag it into Firefox or right click and choose Firefox from "open with" - thanks!) They both play in Chrome. There is a long discussion on the Mozilla bug tracking site about a (...) -- view, download, view, download, https://bugzilla.mozilla.org/show_bug.cgi?id=1130450
• 18:12
  Transparency is gone while resizing (scaling) gif using ffmpeg - user3269550 Newest 'ffmpeg' Questions - Stack Overflow
  I am re-sizing gif images using ffmpeg. My problem is that the transparency of image is not coming while re-sizing. How can I achieve transparency while re-sizing it? My ffmpeg command is: ffmpeg -i input.gif-vf scale=320:240 output_converted_gif.gif
• 16:29
  How to concatenate two or more videos with same width and different height in FFMpeg and to maintain the same aspect ratio? - Aarwil Newest 'ffmpeg' Questions - Stack Overflow
  I have five video parts to concat all. Each five videos are in the same width and height. The second part is the hstack of another 2 videos and the third part is the hstack and vstack of another 3 videos. While concat all the five video parts the aspect ratio is not maintaining in the final video. Since I am new to ffmpeg help me to sort out the problem I have tried with the command in my final with filter complex and to reduce the size I used frame per second. "ffmpeg -i final.mp4 -vf scale=1280:480 -filter:v fps=fps=30 finalNew.mp4" but nothing worked. Also help me to use hstack with (...) -- second part, third part, videochunks
• 14:13
  FFMPEG generates an empty master playlist - Сергей Барахтенко Newest 'ffmpeg' Questions - Stack Overflow
  I use the following FFMPEG command to generate playlists and a master-playlist for later insertion into a player with HLS support: ffmpeg/ffmpeg.exe -i input/test.mp4 -preset fast -g 150 -sc_threshold 0 -threads 4 -map 0:v:0 -map 0:a:0 -map 0:v:0 -map 0:a:0 -map 0:v:0 -map 0:a:0 -map 0:v:0 -map 0:a:0 -filter:v:0 scale=h=240:w=-2 -minrate:v:0 75k -maxrate:v:0 218k -bufsize:v:0 300k -b:v:0 150k -filter:v:1 scale=h=360:w=-2 -minrate:v:1 138k -maxrate:v:1 400k -bufsize:v:1 552k -b:v:1 276k -filter:v:2 scale=h=480:w=-2 -minrate:v:2 375k -maxrate:v:2 1088k -bufsize:v:2 1500k -b:v:2 750k (...)
• 13:31
  How to concatenate two or more videos with different width in FFMpeg and to maintain the same aspect ratio? - Aarwil Newest 'ffmpeg' Questions - Stack Overflow
  I have five video parts to concat all. Each five videos are in the same width and height. The second part is the hstack of another 2 videos and the third part is the hstack and vstack of another 3 videos. While concat all the five video parts the aspect ratio is not maintaining in the final video. Since I am new to ffmpeg help me to sort out the problem I have tried with the command with filter complex and to reduce the size I used frame per second. "ffmpeg -i RM356ce8c15f47cb07b7af885fd718a39f/final/RM356ce8c15f47cb07b7af885fd718a39f.mp4 -vf scale=1280:480 -filter:v fps=fps=30 (...)
• 12:30
  What different video formats RTMP streaming support? - Padfoot Newest 'ffmpeg' Questions - Stack Overflow
  In almost all the online references related to FFMPEG and RTMP, I am getting -f as flv. Is there any other formats. (I have tried avi, mpeg and h264, but no success.) Currently, I am running following command - ffmpeg -re -i video.mp4 -f s16le -ar 48000 -ac 2 -i audio.wav -c copy -f flv rtmp://192.168.0.1:1935/myapp/stream The issues with -f flv in my case are - It doesn't support 48k sample rate. None of my input videos are in flv format (I have to convert it to flv externally). P.S. - I am using VLC as RTMP player. EDIT - I am getting following error with 48k audio file - [flv ⓐ (...)
• 12:01
  How to specify Input video device when I use ffmpeg - n179911 Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to use ffmpeg to record video in command line. I tried: .\\ffmpeg.exe -f vfwcap -i 0 c:\\test.mp4 And it pops up a window asking for "Video Source", Select a Video Device: "Integrated Camera". So I tried: .\\ffmpeg.exe -f vfwcap -i "Integrated Camera" c:\\test.mp4 But it still pops up the same window. How I can specify the 'Integrated Camera' as my input device to ffmpeg?
• 09:18
  nodejs FFMPEG add multiple inputs not working - HUNG Newest 'ffmpeg' Questions - Stack Overflow
  var ffmpeg = require('fluent-ffmpeg'); var proc = ffmpeg() .input('./_animation/overlay1_%04d.png') .inputFPS(20) .input('./_animation/overlay2_%04d.png') .inputFPS(20) .input('./_animation/static1.png').inputFPS(1) .input('./_animation/static2.png').inputFPS(1) .outputFPS(20) .save('./public/_ugc/' + new Date() + '.mp4'); I would like to create a video which combining from 4 sources, i.e. overlay1 sequences, overlay2 sequences and two static images. However, it is now always shows only one of the sources only. How to combine them in each of the frame? And since the sources are not in (...)
• 09:18
  Getting RTSP stream with Opencv and python - magicleon94 Newest 'ffmpeg' Questions - Stack Overflow
  I know this could be the 100th question of this kind, but I dug up google and everything, and I could not find anything working. I need to get an RTSP stream with opencv in python, and I'm out of ideas. Here's what I tried so far: Tried to stream with ffserver and ffmpeg but even when I got it working, I could see the stream only in the browser with very high latency, and not working in opencv Tried to stream directly to udp with ffmpeg but again, no luck Tried this script, but all I got was corrupted and unusable images. Any ideas? I'm running on Mac OSX Sierra, I have compiled OpenCV (...) -- this
• 09:18
  using ffmpeg in XCode: Operation not permitted - NCrusher Newest 'ffmpeg' Questions - Stack Overflow
  In an effort to try to get to the bottom of the problem I discussed here, I decided to try to get what I was doing closer to the example I borrowed from when writing my code, which is described here. So instead of formatting my filters in another methods, I tried to code them directly into the method to run the conversion. Unfortunately this results in a very repetitive method, because I have to handle the switch statement for the different conversion choices here as well. So this is what my method looks like now: func ffmpegConvert() guard let launchPath = (...)
• 08:52
  libswscale/swscale.h: No such file or directory - Aman Newest 'ffmpeg' Questions - Stack Overflow
  When installing Sumo-0.30.0 on Ubuntu 16.04, make resulted in the following error: make[4]: Entering directory '/home//sumo-0.30.0/src/gui' g++ -DHAVE_CONFIG_H -I. -I../../src -I/home//sumo-0.30.0/./src -I/usr/include/ffmpeg -I/usr/local/include -I/usr/include/fox-1.6 -I/usr/include/gdal -I/usr/local/include -I/usr/include -msse2 -mfpmath=sse -O2 -DNDEBUG -MT GUIViewTraffic.o -MD -MP -MF .deps/GUIViewTraffic.Tpo -c -o GUIViewTraffic.o GUIViewTraffic.cpp In file included from GUIViewTraffic.cpp:36:0: ../../src/utils/gui/div/GUIVideoEncoder.h:58:32: fatal error: libswscale/swscale.h: No (...) -- Installing/Linux Build Libraries, installation guide, here
• 00:37
  loop overlay input video WITH SOUND ffmpeg - Роман Дэффи Newest 'ffmpeg' Questions - Stack Overflow
  I am attempting to overlay two videos using the following call to ffmpeg: ffmpeg -i video.mp4 -i los.mov -filter_complex \\ "[0:v]setpts=PTS-STARTPTS, scale=1280x720[top], [1:v]loop=-1:size=750, setpts=N/FRAME_RATE/TB, scale=1280x720, format=yuva420p, colorchannelmixer=aa=1[bottom],[top][bottom]overlay=shortest=1, format=yuv420p[out]"\\ -map "[out]" -map 1:a -b:v 2000k -r 29.97 out.mp4 I want the videos to be overlaid and for the sound of both videos to play but with the above only audio from one of the videos can be (...)

22 October

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

• 23:34
  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 realized (...)
• 20:53
  How to set custom handler_name metadata for subtitle stream using FFMPEG - AWainb Newest 'ffmpeg' Questions - Stack Overflow
  I'm currently using FFMPEG to embed subtitles into my MP4 files and I am stumped trying to figure out how to custom set the "handler_name" metadata tag on my subtitle stream so I can control the name that is displayed when selecting the subtitle within a player like MPC-HC (Media Player Classic)? My current command to embed the subtitle is: ffmpeg -i "video.mp4" -sub_charenc UTF-8 -i "video.srt" -c:v copy -c:a copy -c:s mov_text -metadata:s:s:0 language=eng -metadata:s:s:0 handler_name="English" -id3v2_version 3 -write_id3v1 1 "subbed_video.mp4" Output: C:\\path\\to>ffmpeg -y -i (...) -- FFMPEG, MPC-HC, MP4BOX, FFMPEG\'s valid metadata tag list, AtomicParsley
• 19:59
  Failed to convert webm audio file to mp4 using FFMPEG - Shijin Newest 'ffmpeg' Questions - Stack Overflow
  I have a webm audio file , I was trying to convert it into mp4 using ffmpeg. But it is failed to create the mp4. The info about the file is as follows. fmpeg -i 54ebe077-96fc-4ace-9a38-f13c58807322.webm -hide_banner Input #0, matroska,webm, from '54ebe077-96fc-4ace-9a38-f13c58807322.webm': Metadata: encoder : Lavf56.40.101 creation_time : 2019-10-22T11:19:12.000000Z Duration: 00:00:24.16, start: 0.000000, bitrate: 41 kb/s Stream #0:0: Video: vp8, yuv420p, 640x480, SAR 1:1 DAR 4:3, 30 fps, 30 tbr, 1k tbn, 1k tbc (default) Stream #0:1: Audio: opus, 48000 Hz, mono, fltp (default) At least (...)
• 18:40
  Generating a waveform of raw audio using ffmpeg not working right (not showing clippings) - Sergey Romanyuk Newest 'ffmpeg' Questions - Stack Overflow
  I generated a waveform of the raw audio with ffmpeg and it looks as perfectly normal audio on the picture. But when I imported it in Audacity, I can see and hear that the audio is clipping. I tried simple command: ffmpeg -f s16le -ar 16000 -ac 1 -i audio.raw -lavfi showwavespic audio.png With this result: waveform image 1 And also tried this solution https://stackoverflow.com/a/32276471/12253501 Looks much prettier, but still can't see that audio actually clipped: waveform image 2. For the second one I made sure to delete "compand=gain=-6" to get the actual audio level. And here's (...) -- waveform image 1, waveform image 2, screenshot from Audacity, raw and wav
• 16:22
  Encoding audio to matroska container using ffmpeg audio encoder adpcm_adx - Narek Aydinyan Newest 'ffmpeg' Questions - Stack Overflow
  Trying to reencode audio file from mp4 container to Matroska(mkv) container using FFmpeg audio encoder adpcm_adx or (aptx, comfortnoise, g726le...) I am getting an error message No wav codec tag found for codec ... I have c++ code which includes thired-party integration of ffmpeg, and I am having the same result using ffmpeg terminal options. ffmpeg -i file.mp4 -c:v copy -c:a adpcm_adx -b:a 44100 output.mkv Instead of getting output file correctly I am getting No wav codec tag found for codec adpcm_adx Could not write header for output file #0 (incorrect codec parameters ?): Invalid (...)
• 16:18
  How to fix corrupt video caused by amix filter - FFMPEG - EJL Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to put text and audio in a video using FFMPEG. It is weird because the output is corrupted and the video timeline stop counting the video time currently playing. And also, some portions of the video are missing and even freezing/hanging. I already tried to search for this including updating my computers OS (Centos 7). Also, updating, upgrading ffmpeg build in my unit but still no luck. I am generating the video using this command: ffmpeg -i input.mp4 \\ -i mouse_click.mp3 \\ -i typing.mp3 \\ -filter_complex (...)
• 14:33
  Getting green screen in ffplay: Streaming desktop (DirectX surface) as H264 video over RTP stream using Live555 - Ram Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to stream the desktop(DirectX surface) as H264 video over RTP stream using Live555 & Windows media foundation's hardware encoder, and expecting it to be rendered by ffplay (ffmpeg 4.2). But only getting a green screen like below, I referred MFWebCamToRTP mediafoundation-sample & Encoding DirectX surface using hardware MFT for implementing live555's FramedSource and changing the input source to DirectX surface instead of webCam. Here is an excerpt of my implementation for Live555's doGetNextFrame callback to feed input samples from directX surface: virtual void (...) -- , , MFWebCamToRTP mediafoundation-sample, Encoding DirectX surface using hardware MFT, Here
• 14:24
  ffmpeg convert cdg/mp3 to mp4 but cdg track is always sped up by a second - Carver S Newest 'ffmpeg' Questions - Stack Overflow
  I've tried this: "C:\\Program Files\\ffmpeg-4.2.1-win64-static\\bin\\ffmpeg" -i %1 -i %2 -b:v 1M -y -speed 2 "%~dpn1.mp4" "C:\\Program Files\\ffmpeg-4.2.1-win64-static\\bin\\ffmpeg" -i %1 -i %2 -pix_fmt yuv420p -vcodec libx264 -async 1 -speed 2 "%~dpn1.mp4" Always same result. The file and quality are great, but obv since its karaoke... the lyrics need to match the timing and the converted files lyrics track is always about a full second or so ahead from when I play the original in a Karaoke program. Any ideas on what settings I could play with to help with this? Both the original and the (...)
• 14:21
  HEVC Encoder (convert from JPG to HEIC) - Võ Anh Kiệt Newest 'ffmpeg' Questions - Stack Overflow
  I have some trouble when converting from JPG to HEIC format (using HEVC Encoding) on Android I'm using Nokia HEIF's library (https://github.com/nokiatech/heif/) for parsing data which I need to put some data includes: Decoder config data (as a byte array) following the name called by Nokia, I think that data can be profile data, header data, ... that store the VPS/PPS, Exif, metadata ... Image data following the name called by Nokia -> This may is a bitstream of HEVC Encoding. So now, I got the image data bitstream (2) based FFMPEG tool by command as bellow: ffmpeg -i oktest.png -crf (...) -- https://github.com/nokiatech/heif/, https://github.com/nokiatech/heif/issues/44
• 12:29
  Audio drift in Premiere (not VFR) - petaire Newest 'ffmpeg' Questions - Stack Overflow
  I'm getting audio drift in Premiere, and it's not related (or is it?) to VFR. I honestly really dont know where this is coming from, but, oh God, Premiere… Obviously, when I read the file in VLC or any other player, it's fine. But in Premiere… Here's my media informations : General Complete name : /Users/petaire/Desktop/LCI-2019-10-16_10-00-00h.mp4 Format : MPEG-4 Format profile : Base Media Codec ID : isom (isom/iso2/avc1/mp41) File size : 831 MiB Duration : 2h 0mn Overall bit rate : 968 Kbps Writing application : Lavf57.83.100 Video ID : 1 Format : AVC Format/Info : Advanced Video Codec (...)
• 10:50
  FFMPEG, the penultimate image from the .txt file doesn't show in the video - ArmKh Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to create a video from the images using ffmeg. Actually, the creating of the video works but there is a small problem. I have a text file with the names of the images (paths) which I'm using in the video. The file looks like this file 'image1.jpg' file 'image2.jpg' file 'image3.jpg' file 'image4.jpg' file 'image5.jpg' And the ffmeg command is following ffmpeg -y -r 1/5 -f concat -safe 0 -i imagenames.txt -i some_audio.mp3 -c:v libx264 -vf fps=30 -pix_fmt yuv420p -t 25 output.mp4 So, this video should keep every image 5 seconds and the problem is the penultimate image ( image4 (...)
• 09:40
  FFMPEG: Generate mastered m3u8 playlist - Сергей Барахтенко Newest 'ffmpeg' Questions - Stack Overflow
  Tell the command line for FFMPEG to generate a playlist of the following format: #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=380000,RESOLUTION=640x360,CODECS="mp4a.40.2,avc1.77.30",CLOSED-CAPTIONS=NONE https://myurl/media/manifest/[input_file_name]-360.m3u8 #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=1510000,RESOLUTION=1920x1080,CODECS="mp4a.40.2,avc1.77.30",CLOSED-CAPTIONS=NONE https://myurl/media/manifest/[input_file_name]-1080.m3u8 #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=890000,RESOLUTION=1280x720,CODECS="mp4a.40.2,avc1.77.30",CLOSED-CAPTIONS=NONE (...)
• 09:27
  How to properly close a FFmpeg stream and AVFormatContext without leaking memory? - Darkwonder Newest 'ffmpeg' Questions - Stack Overflow
  I have built an app that uses FFmpeg to connect to remote IP cameras in order to receive video and audio frames via RTSP 2.0. The app is built using Xcode 10-11 and Objective-C with a custom FFmpeg build config. The architecture is the following: MyApp Document_0 RTSPContainerObject_0 RTSPObject_0 RTSPContainerObject_1 RTSPObject_1 ... Document_1 ... GOAL: After closing Document_0 no FFmpeg objects should be leaked. The closing process should stop-frame reading and destroy all objects which use FFmpeg. PROBLEM: Somehow Xcode's memory debugger shows two instances of MyApp. FACTS: (...) --
• 08:48
  FFMPEG: animation: Zoom In and zoom Out - Hugo Newest 'ffmpeg' Questions - Stack Overflow
  How can I get the following effect with FFMPEG? I know I have to do it with Zoompan, but the truth is, I've been trying for a while and I can not! --
• 08:46
  Formatting ffmpeg arguments correctly in Swift - NCrusher Newest 'ffmpeg' Questions - Stack Overflow
  I deleted my previous post about this because I've gone through a lot more trial and error on it and I needed to be sure I was giving current and relevant information. I'm trying to create a very simple audio conversion app for MacOS using ffmpeg. Because it's geared at audiobooks, the audio options are pretty basic. func conversionSelection() if inputFileUrl != nil let conversionChoice = conversionOptionsPopup.indexOfSelectedItem switch conversionChoice case 1 : outputExtension = ".mp3" ffmpegFilters = ["-c:a libmp3lame", "-ac 1", "-ar 22050", "-q:a 9"] case 2 : outputExtension = (...)
• 06:13
  Using an array of strings as a function parameter in a function that builds another array - NCrusher Newest 'ffmpeg' Questions - Stack Overflow
  I start with an empty array: var ffmpegFilters = [String]() I have a button that should start an ffmpeg process when I click it: ⓐIBAction func startConversionClicked(_ sender: Any) //buildFfmpegString() ffmpegConvert(inputPath: inputFilePath, filters: ffmpegFilters, outputPath: "outputFilePath") The function with the process looks like this: func ffmpegConvert(inputPath: String, filters: String, outputPath: String) guard let launchPath = Bundle.main.path(forResource: "ffmpeg", ofType: "") else return do let convertTask: Process = Process() convertTask.launchPath = launchPath (...)
• 04:17
  How can I extract some frames of a rtsp using directly python or python-opencv? - John Doe Newest 'ffmpeg' Questions - Stack Overflow
  I want to know if there is any method of Python or probably from python-opencv that allows me to extract frames from a rtsp streaming. I know that such task can be done easily using a ffmpeg library but ffmpeg uses a lot of my CPU.
• 02:44
  FFmpeg how to get the first drawtext's x,y value to the second drawtext, and change the fontsize every frame, how to create a var? - FFmpeg2019 Newest 'ffmpeg' Questions - Stack Overflow
  I have a ffmpeg code: ffmpeg -i input.mp4 -vf drawtext=text=hello:fontsize=18:x=rand(0,640):y=rand(0,480),drawtext=world:fontsize=fontsize+0.1:x=16+?:y=? output.mp4 And have three questions: How to let the "fontsize+0.1" work? The two "?" how to get the first drawtext's x,y values? let the two strings become one string like this: hello world. how to create a var?
• 02:10
  FFmpeg - RTCP BYE packets - DZoki019 Newest 'ffmpeg' Questions - Stack Overflow
  I’m working on some C++ project which depends on Wi-Fi RAK5206 electronic board. I’m using ffmpeg library to obtain video and audio stream and I have issue where I can start and stop stream for four times, but when I want to start for the fifth time I get error. Error description is Invalid data found when processing input and it happens when I call avformat_open_input function and I need to restart the electronic board, reconnect to Wi-Fi etc. I figured out with Wireshark application that VLC is working and it is sending some BYE packets when TEARDOWN is called. I wonder if error depends (...) -- rtpenc.h