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• FFMPEG creates an empty gif when the start time (-ss) of the video is over 9 seconds ?

  30 décembre 2020, par blablubla12

  I'm running this command in node.js

  


  function CreateGif() {
    return new Promise((resolve, reject) => {
      const ffmpeg = spawn(ffmpegPath, [
        '-ss',
        '00:00:10.000',
        '-i',
        target,
        '-i',
        overlayTarget,
        '-filter_complex',
        `[0:v]trim=duration=5,setpts=PTS-STARTPTS,scale=450:-1[trimmed];[trimmed]split[trimmed1][trimmed2];[trimmed2]reverse[rev];[trimmed1][rev]concat=n=2:v=1:a=0[v];[v][1:v]overlay=0:0:format=rgb[overlayed];[overlayed]split[a][b];[a]palettegen=stats_mode=diff[palette];[b][palette]paletteuse=bayer:bayer_scale=3.5[out]`,
        '-map',
        '[out]',
        '-y',
        tempPath
      ]);

      ffmpeg.stderr.setEncoding('utf8');
      ffmpeg.stderr.on('data', (data) => {
        console.log(data);
      });

      ffmpeg.on('close', function (code) {
        console.log('closed');
        resolve();
      });

      ffmpeg.on('error', function (err) {
        console.log(err);
        reject();
        throw new Error(err);
      });
    });
  }


  


  If the start time -ss is 00:00:09.000 or anything less than 10 seconds, then it creates the correct gif. However if I put 00:00:10.000 or anything above, it creates an empty gif (0 bytes). The same command works when I run it through cmd. FFMPEG version is ffmpeg version N-55112-g7eb9cf593e-static https://johnvansickle.com/ffmpeg/ Copyright (c) 2000-2020

  


  Note : The video (defined as target in the code) is 1:30 min long and overlayTarget is a png image.

  


• avcodec/frame_thread_encoder : Free AVCodecContext structure on error during init

  14 août 2021, par Michael Niedermayer

  avcodec/frame_thread_encoder : Free AVCodecContext structure on error during init
  Fixes : MemLeak
  
  Fixes : 8281
  
  Fixes : PoC_option158.jpg
  
  Fixes : CVE-2020-22037
  Reviewed-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavcodec/frame_thread_encoder.c
  • [DH] libavcodec/frame_thread_encoder.h

• mp4 created by ffmpeg will not play with IPython.display.Video

  19 novembre 2020, par Austin

  I'm creating a mp4 video from jpegs with ffmpeg, using the following command :

  


  ffmpeg -y -threads 0 -f image2 -i jpegs/%05d.jpg -framerate 10 video.mp4

  


  The resulting video will play fine with VLC, but will not play in a Jupyter notebook via :

  


  from IPython.display import Video
Video('video.mp4')


  


  This notebook video functionality has worked for me in the past, so I assume there's something about the codec/mime type that the Video function can't resolve ?

  


  ---

  


  Requested update

  


  New command I've tried :

  


  ffmpeg -y -framerate 10 -i jpegs/%05d.jpg -vf format=yuv420p -movflags +faststart video.mp4

  


  Video still plays fine in VLC and still does not play in Jupyter. I've looked at the duplicates this is marked as and it does not actually seem to be the same issue..

  


  Here's the output (I've removed the framerate and threads flags to simplify) :

  


  algo-1-poqk5_1  | 2020-11-18 21:19:36 [INFO]: ffmpeg output:
algo-1-poqk5_1  | 2020-11-18 21:19:36 [INFO]: ffmpeg version 4.0 Copyright (c) 2000-2018 the FFmpeg developers
algo-1-poqk5_1  |   built with gcc 7.2.0 (crosstool-NG fa8859cb)
algo-1-poqk5_1  |   configuration: --prefix=/opt/conda --cc=/opt/conda/conda-bld/ffmpeg_1531088893642/_build_env/bin/x86_64-conda_cos6-linux-gnu-cc --disable-doc --enable-shared --enable-static --enable-zlib --enable-pic --enable-gpl --enable-version3 --disable-nonfree --enable-hardcoded-tables --enable-avresample --enable-libfreetype --disable-openssl --disable-gnutls --enable-libvpx --enable-pthreads --enable-libopus --enable-postproc --disable-libx264
algo-1-poqk5_1  |   libavutil      56. 14.100 / 56. 14.100
algo-1-poqk5_1  |   libavcodec     58. 18.100 / 58. 18.100
algo-1-poqk5_1  |   libavformat    58. 12.100 / 58. 12.100
algo-1-poqk5_1  |   libavdevice    58.  3.100 / 58.  3.100
algo-1-poqk5_1  |   libavfilter     7. 16.100 /  7. 16.100
algo-1-poqk5_1  |   libavresample   4.  0.  0 /  4.  0.  0
algo-1-poqk5_1  |   libswscale      5.  1.100 /  5.  1.100
algo-1-poqk5_1  |   libswresample   3.  1.100 /  3.  1.100
algo-1-poqk5_1  |   libpostproc    55.  1.100 / 55.  1.100
algo-1-poqk5_1  | Input #0, image2, from '/opt/ml/model/outputs/01-IR.mp4_1/%05d.jpg':
algo-1-poqk5_1  |   Duration: 00:00:12.00, start: 0.000000, bitrate: N/A
algo-1-poqk5_1  |     Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 25 tbn, 25 tbc
algo-1-poqk5_1  | Stream mapping:
algo-1-poqk5_1  |   Stream #0:0 -> #0:0 (mjpeg (native) -> mpeg4 (native))
algo-1-poqk5_1  | Press [q] to stop, [?] for help
algo-1-poqk5_1  | [swscaler @ 0x55b8cc6fcc40] deprecated pixel format used, make sure you did set range correctly
algo-1-poqk5_1  | Output #0, mp4, to '/opt/ml/model/outputs/01-IR.mp4_1/video.mp4':
algo-1-poqk5_1  |   Metadata:
algo-1-poqk5_1  |     encoder         : Lavf58.12.100
algo-1-poqk5_1  |     Stream #0:0: Video: mpeg4 (mp4v / 0x7634706D), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 25 fps, 12800 tbn, 25 tbc
algo-1-poqk5_1  |     Metadata:
algo-1-poqk5_1  |       encoder         : Lavc58.18.100 mpeg4
algo-1-poqk5_1  |     Side data:
algo-1-poqk5_1  |       cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
algo-1-poqk5_1  | frame=   31 fps=0.0 q=31.0 size=     768kB time=00:00:01.20 bitrate=5242.8kbits/s speed=2.33x    
algo-1-poqk5_1  | frame=   64 fps= 63 q=31.0 size=    1280kB time=00:00:02.52 bitrate=4161.0kbits/s speed=2.48x    
algo-1-poqk5_1  | frame=   98 fps= 64 q=31.0 size=    1792kB time=00:00:03.88 bitrate=3783.5kbits/s speed=2.53x    
algo-1-poqk5_1  | frame=  131 fps= 64 q=31.0 size=    2304kB time=00:00:05.20 bitrate=3629.7kbits/s speed=2.55x    
algo-1-poqk5_1  | frame=  164 fps= 64 q=31.0 size=    2560kB time=00:00:06.52 bitrate=3216.5kbits/s speed=2.56x    
algo-1-poqk5_1  | frame=  198 fps= 65 q=31.0 size=    3072kB time=00:00:07.88 bitrate=3193.6kbits/s speed=2.58x    
algo-1-poqk5_1  | frame=  232 fps= 65 q=31.0 size=    3328kB time=00:00:09.24 bitrate=2950.6kbits/s speed= 2.6x    
algo-1-poqk5_1  | frame=  266 fps= 66 q=31.0 size=    3840kB time=00:00:10.60 bitrate=2967.7kbits/s speed=2.62x    
algo-1-poqk5_1  | frame=  299 fps= 66 q=31.0 size=    4096kB time=00:00:11.92 bitrate=2815.0kbits/s speed=2.62x    
algo-1-poqk5_1  | [mp4 @ 0x55b8cc658900] Starting second pass: moving the moov atom to the beginning of the file
algo-1-poqk5_1  | frame=  300 fps= 65 q=31.0 Lsize=    4202kB time=00:00:11.96 bitrate=2877.9kbits/s speed=2.61x    
algo-1-poqk5_1  | video:4199kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.052020%