23 January

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

• 05:56
  How do I add a custom thumbnail to a .mp4 file using ffmpeg? - cooder_one Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to find the proper ffmpeg command to add a .png or .jpg image to a .mp4 video as a thumbnail. The command will eventually automatically be executed by a C# program. This is what I have so far: # This does not work. It only removes the default thumbnail. ffmpeg -i video.mp4 -i image.png -acodec copy -vcodec copy -map 0 -map 1:0 OUTPUT.mp4 Is what I want possible with ffmpeg? If so, please guide me in the right direction.
• 05:40
  How do I add a cover image to a MP4 file with ffmpeg? [duplicate] - IremadzeArchil19910311 Newest 'ffmpeg' Questions - Stack Overflow
  In Windows Explorer, when in the "Large icons" or "Extra large icons" layout, a MP4 file appears as a thumbnail. By default, the thumbnail image is taken from some frame in the middle of the video. How do I replace this automatically generated thumbnail with a specific cover image? What ffmpeg commands will add a cover image to a MP4 video file?
• 02:41
  FFMpeg giving invalid argument error with python subprocess - Emre Erol Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to convert a file or microphone stream to 22050 sample rate and change tempo to double. I can do it using terminal with below code; #ffmpeg -i test.mp3 -af asetrate=44100*0.5,aresample=44100,atempo=2 output.mp3 But i can not run this terminal code with python subprocess. I try many things but every time fail. Generaly i am taking Requested output format 'asetrate' or 'aresample' or 'atempo' is not suitable output format errors. Invalid argument. How can i run it and take a stream with pipe? song = subprocess.Popen(["ffmpeg.exe", "-i", sys.argv[1], "-f", "asetrate", "22050", (...)

22 January

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

• 23:51
  How do I attach multiple GIFs and adjust the FPS? - Olramde Newest 'ffmpeg' Questions - Stack Overflow
  I want to attach several GIFs and then change the FPS to 10. ffmpeg -f concat -safe 0 -i 1.txt -filter:v fps=fps=1 -c copy output.gif Executing the above command will result in the following error: Filtergraph 'fps=fps=10' was defined for video output stream 0:0 but codec copy was selected. Filtering and streamcopy cannot be used together. Except for filter options to adjust the FPS, the following error will not occur, but another problem will (...)
• 23:28
  Android FFMPEG do nothing - Anton A. Newest 'ffmpeg' Questions - Stack Overflow
  I try to scale down video on Android device using FFMPEG. OnCreate of Activity where I call scaleVideo(), also initialization of FFMPEG and binaries load. private void scaleVideo(String path) throws FFmpegCommandAlreadyRunningException, IOException File copy = new File(DESTINATION_PATH + FilenameUtils.getBaseName(path) + "_scaled." + FilenameUtils.getExtension(path)); if (!copy.exists()) copy.createNewFile(); String cmd = "-i " + path + " -vf scale=320:-1 " + copy.getPath(); String[] command = cmd.split(" "); fFmpeg.execute(command, new FFmpegExecuteResponseHandler() ⓐOverride public (...)
• 19:06
  Merge Audiotracks on in Videofile to one with ffmpeg [duplicate] - masiboss Newest 'ffmpeg' Questions - Stack Overflow
  I have many video files from shadowplay with 2 separate tracks for desktop and microphone audio. How would i go about merging these 2 audio tracks included with the .mp4 video into one?

git.videolan.org Git - ffmpeg.git/rss log http://git.videolan.org/?p=ffmpeg.git;a=summary

• 22:21
  avfilter/vf_v360: add tetrahedron format - Paul B Mahol git.videolan.org Git - ffmpeg.git/rss log
  avfilter/vf_v360: add tetrahedron format [DH] doc/filters.texi [DH] libavfilter/v360.h [DH] libavfilter/vf_v360.c

Revisions : SPIP http://core.spip.org/projects/spip/activity

• 22:23
  Anomalie #4424 (Résolu): Une rubrique est considérée comme publiée si elle a un logo - nicod _ Revisions : SPIP
  C'est commité et pushé.
• 22:20
  Révision 24480: Ne pas considérer une rubrique comme publiée quand on lui ajoute un logo. - nicodⓐlerebooteux.fr Revisions : SPIP
  https://core.spip.net/issues/4424

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

• 20:32
  ffmpeg vertically center align multiple lines of text using drawtext and subtitle both filters independent of font size - Rehan Newest 'ffmpeg' Questions - Stack Overflow
  I want to vertically center align the text on video no matter what the font size is. And possibly if it could be done using drawtext filter and subtitles filter as well for subtitles filter if anyone can guide how to move the lines few columns up. I tried multiple [in]drawtext=...,drawtext=...[out] filter but when change the font size alignment goes wrong curious to know if there is some calculated formula to do this accurately.
• 19:57
  Using an IF-Statement inside a drawtext (FFMPEG) - MonsterDruide1 Newest 'ffmpeg' Questions - Stack Overflow
  I'm currently trying to implement a timer on a video with FFMPEG, so it should start at 00.00 and start timing after a number of frames and stop timing again after a set amount of frames. So the timer should work like this: 00:00 00:00 00.00 (start timing) 00.01 00.02 [...] 05.88 05.89 (stop timing) 05.89 05.89 05.89 So far I've got the following as (minimal) command: ffmpeg -i input.mp4 -filter_complex "[0:v]drawtext=fontfile='C\\\\:font.ttf': text='%eif\\\\:n/30\\\\:d\\\\:2\\\\:%eif\\\\:((mod(n,30))/30)*100\\\\:d\\\\:2': (...)
• 19:16
  ffmpeg creates an mp4 stream which results error in Firefox - Daniel Newest 'ffmpeg' Questions - Stack Overflow
  I'm about to play an fmp4 in HTML5 video element. I was successfully created a websocket to pass ffmpeg's output into MSE. However when I try to open the page in Firefox (72.0.1, 64bit, under Ubuntu 18.04LTS), it always results an error: Media resource blob:http://localhost/XXXX could not be decoded, error: Error Code: NS_ERROR_FAILURE (0x80004005) Details: virtual mozilla::MediaResult mozilla::MP4ContainerParser::IsInitSegmentPresent(const mozilla::MediaSpan &): Invalid Top-Level Box:f" This is my FFMPEG's line: ffmpeg -r 5 -i rtsp://IPCAMERA -c:v copy -an -movflags (...) -- repo, https://pastebin.com/Gjq2vxeT
• 19:09
  ffmpeg extract frame and get timestamp based on creation time for each extracted frame in exif or txt - Scaling Newest 'ffmpeg' Questions - Stack Overflow
  I try to extract frames from a underwater survey video using ffmpeg. the extracted frames should be merged with a gps position based on a timestamp later in the process. the code i use to extract the frames is: ffmpeg -i GOPR0173.MP4 -qscale:v 2 -r 1 frames/%4d.jpg. I need a solution to get the real timestamp of the frame based on the survey datetime, so that the timestamp of the frame equals the real time when the video was created. Ideally the timestamp is saved in the images exif or if this is not possible in a seperate textfile and the timestamp is used as name of the files like (...)

git.videolan.org Git - ffmpeg.git/rss log http://git.videolan.org/?p=ffmpeg.git;a=summary

• 19:11
  avfilter/vf_stack: add fill option for xstack - Paul B Mahol git.videolan.org Git - ffmpeg.git/rss log
  avfilter/vf_stack: add fill option for xstack [DH] doc/filters.texi [DH] libavfilter/vf_stack.c

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

• 18:46
  Use WebRTC/GetUserMedia stream as input for FFMPEG - ApplowPi Newest 'ffmpeg' Questions - Stack Overflow
  I'm recording my screen with gerUserMedia and get my video & audio stream. I'm then using WebRTC to send/receive this stream on another device. Is there any way I can then use this incoming webrtc stream as an input for ffmpeg by converting it somehow? Everything I'm working with is in javascript. Thanks in advance.
• 18:06
  Libav/ffmpeg api duplicates first frame of mp4 video and makes it second frame - Optic_Ray Newest 'ffmpeg' Questions - Stack Overflow
  I am making video mp4 file from couple of jpg image files with different sizes present as sample.jpg (sample1.jpg, sample2.jpg, etc) in a folder. I modified ffmpeg muxing.c example to make it create mp4 file from these set of jpg images(for frames) and also modified it to create only video stream(no audio stream). It is able to create mp4 file with n video frames from n different jpg image files, but mp4 file it outputs when n=2 isn't as expected. I have tried from n=1 to n=7 so far. When n=2 mp4 file is created but I could see only first jpg image as frame in the entire video. It appears (...) -- muxing.c
• 16:03
  Is their any way to split video into multiple segment using ffmpeg in android? - Ayaz Qureshi Newest 'ffmpeg' Questions - Stack Overflow
  I want to trim video into 30 seconds multiple segments in android studio.I have used the following command to trim video into 30 seconds but this is not the way i want,its just trimming video into 30 sec.Is there any FFmpeg command available to split video into multiple segments in android studio of specific duration like 30 secs?

Revisions : SPIP http://core.spip.org/projects/spip/activity

• 14:52
  Révision 24478: Fix : utiliser propre sur les nom de plugin est dangereux, car certains plugins p... - cedricⓐyterium.com Revisions : SPIP
• 14:55
  Révision 24479: Fix : utiliser propre sur les nom de plugin est dangereux, car certains plugins p... - cedricⓐyterium.com Revisions : SPIP

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

• 15:04
  record video from website using puppeteer + ffmpeg - rudolfninja Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to record video from website using the way similar to puppeteer-recorder, but I want to stop recording by myself and then save it to file (after I stopped it). I wrote simple web service for this purpose: var express = require('express'); var app = express(); const spawn = require('child_process'); const puppeteer = require('puppeteer'); var record = true; app.get('/startRecord', function (req, res) const frun_record = async () => console.log("Start recording"); const browser = await puppeteer.launch(); const page = await browser.newPage(); await (...) -- puppeteer-recorder
• 14:40
  FFMPEG CPU encoding speed - natloz Newest 'ffmpeg' Questions - Stack Overflow
  I would like to increase the speed of encoding videos. Thou having issue with it... This is my CPU: Intel(R) Xeon(R) CPU E5-2603 v4 ⓐ 1.70GHz OS: Windows 10 PRO 64bit I don't have a graphics card. This is the script I'm using for current video encoding: ffmpeg -y -re -i o.mov -vf subtitles=SUBS.srt -s 1920x1080 -r 25 -pixel_format yuv420p -aspect 16:9 -top 1 -qp 0 -c:v libx264 -b:v 600000 -minrate 600000 -maxrate 600000 -x264opts bitrate=6000:vbv-maxrate=6000:vbv-bufsize=400:ratetol=400:bitrate=6000:vbv-init=800:force-cfr=1 -g 33 -bf 3 -muxrate 6.5M -flags cgop+ilme+ildct -c:a mp2 -ac (...)
• 13:47
  H.264 to DNxHR 444 issue. Colors are not transcoded correctly (HDR project). Note: issue not solved yet - Raulo1985 Newest 'ffmpeg' Questions - Stack Overflow
  I'm having an issue transcoding a H.264 UHD HDR file to a DNxHR file in a mxf container with FFmpeg. The issue is that both files don't look the same at all, the colors look washed out on the DNxHR video, and I tried to make the transcoding as lossless as possible (DNxHR 444 flavor). The original file is a movie I ripped a while ago, H.264, UHD, HDR, in a mkv container. My goal: to create an almost lossless DNxHR file to use it as source file in Adobe Premiere Pro, and use another DNxHR file with less quality as proxy for editing. I wanted to do it that way and not use the original H.264 (...)
• 13:43
  ffmpeg build on mac with videotoolbox enabled becomes unportable - Alexander Novikov Newest 'ffmpeg' Questions - Stack Overflow
  If i configure ffmpeg this way: ./configure --disable-everything --enable-static --disable-shared \\ --enable-gpl --enable-nonfree --enable-encoder=h264_videotoolbox,aac \\ --enable-muxer=mp4 --enable-protocol=file --enable-libfdk-aac --enable-videotoolbox --disable-autodetect it works for my purposes (allows to encode h264 video with aac audio on Mac's videotoolbox - an Apple QSV toolkit), but if i send it to any other computer except the one it was built on, it fails with something like this: dyld: Symbol not found: _kCVImageBufferTransferFunction_ITU_R_2100_HLG Referenced from: (...)

git.videolan.org Git - ffmpeg.git/rss log http://git.videolan.org/?p=ffmpeg.git;a=summary

• 12:23
  avfilter/vf_v360: improve fisheye input format - Paul B Mahol git.videolan.org Git - ffmpeg.git/rss log
  avfilter/vf_v360: improve fisheye input format [DH] libavfilter/vf_v360.c

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

• 12:44
  Fluent-ffmpeg: how to record a video with images coming from a websocket stream? - Igino Boffa Newest 'ffmpeg' Questions - Stack Overflow
  Let's say I'm trying to record a video with images coming from a webpage canvas, sent to an express server through a socket.io connection: //within requestAnimationFrame callback io.emit('video-stream',canvas.toDataURL('image/webp')); //within "stop recording" button onclick io.emit('video-stream-end'); the Express server receives the event... const app = require('express')(); const server = require('http').createServer(app); const io = require('socket.io')(server); const ffmpeg = require('fluent-ffmpeg') io.on('video-stream', (image) => /* ffmpeg stuff to record the video*/ ); (...)

Revisions : multilang http://zone.spip.org/trac/spip-zone/log/_plugins_/multilang

• 10:34
  Revision 119898: utiliser produire_fond_statique() c'est plus efficace et avec un ... - cedricⓐ… Revisions : multilang
  utiliser produire_fond_statique() c'est plus efficace et avec un timestamp dessus ca eviter les problemes de cache lies a la config -- Log
• 10:33
  Revision 119897: PHPDoc - cedricⓐ… Revisions : multilang
  PHPDoc -- Log

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

• 10:59
  How to replace avcodec_encode_audio2()/avcodec_encode_video2() with avcodec_send_frame() and avcodec_receive_packet()? - Optic_Ray Newest 'ffmpeg' Questions - Stack Overflow
  In muxing example in link am attempting to use avcodec_send_frame() and avcodec_receive_packet instead of avcodec_encode_audio2/avcodec_encode_video2 as they are deprecated. In 352 ret = avcodec_encode_audio2(c, &pkt, frame, &got_packet); 353 if (ret time_base, ost->st, &pkt); 360 if (ret and in 522 ret = avcodec_encode_video2(c, &pkt, frame, &got_packet); 523 if (ret time_base, ost->st, &pkt); 530 else 531 ret = 0; 532 533 534 if (ret What to assign got_packet variable with when using avcodec_send_frame() and avcodec_receive_packet() functions and how to (...) -- link
• 10:39
  FFMpeg amix filter volume changes. Explanation request - klodoma Newest 'ffmpeg' Questions - Stack Overflow
  First, the question: IS THERE somewhere documented or explained how ffmpeg amix filter changes the volume in the mixed audio files? I couldn't find any good reference. There are several threads regarding this "issue" that the amix filter changes the volume of the input files. I played around with these and I just cannot explain what is going on. It makes a difference if you "mix" files like concatenate them at specific times or you overlap audio tracks and volume changes just doesn't make any sense. Firstly, I don't understand WHY the volumes need to be changed. Some related refs: (...)

git.videolan.org Git - ffmpeg.git/rss log http://git.videolan.org/?p=ffmpeg.git;a=summary

• 10:42
  avcodec/exr: fix some small cosmetics nits - Paul B Mahol git.videolan.org Git - ffmpeg.git/rss log
  avcodec/exr: fix some small cosmetics nits [DH] libavcodec/exr.c

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

• 06:00
  Video watermarking with ffmpeg (output video size too big ) - kartik bansal Newest 'ffmpeg' Questions - Stack Overflow
  i am running ffmpeg on video of size around 2 Mb and after watermarking them size of my video file is around 13-17 Mb. AM i doing something wrong. Please Help My code is ffmpeg -i "C:\\flask\\mobile_form\\Videos\\20191231140058_987654567.mp4" -i "C:\\flask\\mobile_form\\resizeLogo.jpg" -filter_complex "[0:v][1:v]overlay=10:10,drawtext=text=Hello:fontsize=24:x=main_w-200:y=main_h-100,drawtext=text=World:fontsize=24:x=main_w-200:y=main_h-60" "C:\\flask\\mobile_form\\waterMark\\second.mp4" This is my full log, It is not giving any error but i want my output file to be smaller. ffmpeg version (...)
• 05:21
  How do you encode raw pcm_f32le audio to AAC encoded audio with FFmpeg (C/C++)? - Suhail Doshi Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to encode raw audio (pcm_f32le) to AAC encoded audio. One thing I've noticed is that I can accomplish this via the CLI tool: ffmpeg -f f32le -ar 48000 -ac 2 -c:a pcm_f32le -i out.raw out.m4a -y This plays just fine and decodes fine. The steps I've taken: When I am using the C example code: https://ffmpeg.org/doxygen/3.4/encode_audio_8c-example.html and switch the encoder to codec = avcodec_find_encoder(AV_CODEC_ID_AAC); Output the various sample formats associated with AAC, it only provides FLTP. That assumes a planar/interleaved format. This page seems to provide the (...) -- https://ffmpeg.org/doxygen/3.4/encode_audio_8c-example.html, page, libsoundio
• 03:37
  FFmpeg decoding subtitle (delphi) decoding resutl > 0 but values are zero/null - coban Newest 'ffmpeg' Questions - Stack Overflow
  while True do begin if vst.sub_q.size = 0 then Continue; ret := mpl.packet_queue_get(vst.sub_q, pkt, 0); if(pkt.data = mpl.flush_pkt.data) then begin avcodec_flush_buffers(vst.sub_st.codec); continue; end; ret := avcodec_decode_subtitle2(vst.sub_codec_ctx, ⓐsubt, ⓐgot_sub, ⓐpkt); if ret >= 0 then begin if got_sub = 1 then begin for i := 0 to subt.num_rects-1 do begin s := subt.rects[i].text; if (subt.rects[i].text '') or (subt.rects[i].ass '') then raise Exception.Create(s); end; end; end; av_packet_unref(pkt); end; I'm trying to build a video player using ffmpeg + sdl2 with Delphi. I (...)
• 02:32
  Quickest and most reliable way to get clips of h.264 video from VLC saved uncompressed - Stonecraft Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to set up a pipeline to record video clips while I watch movies (usually but not always in h.264) and prepare them for editing in Premier. I usually watch videos using VLC, and the "record" button is perfect. However, in order to edit the video, it needs to be in a format other than h.264. I've had variable luck with transcoding.. it seems that I have to use trial and error to find a codec I can convert to that doesn't result in horrible artifacts. I'm thinking it would be best to decode the video and save in an uncompressed format, then edit, and then encode in the codec of (...)
• 00:50
  ffmpeg-python - Concatenate videos which may or may not contain audio - Paul Newest 'ffmpeg' Questions - Stack Overflow
  At any time, I may have a list of videos, some with audio and some without. For instance: video_files = [ ffmpeg.input('video_w_audio1.mp4'), ffmpeg.input('video_without_audio2.mp4'), ffmpeg.input('video_w_audio3.mp4'), ] I want to concatenate them into one using the below command: ffmpeg .concat( *video_files, v=1, a=1, unsafe=True) .output("output.mp4") .run() If I run the above without the video w/o audio, the video comes out just fine. If I include the video w/o audio, I get this: ValueError: Expected concat input streams to have length multiple of 2 (v=1, a=1); got 3 I am (...)
• 00:24
  How to get an exact audio channel layout info by ffmpeg? - xin xu Newest 'ffmpeg' Questions - Stack Overflow
  How to get a audio channel layout info by ffmpeg? For example,if audio is 5.1 then I want to get info following like FL+FR+FC+LFE+BL+BR