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• 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%


  


• syncing a video file with audio using ffmpeg is returning a video without audio

  31 juillet 2019, par abbood

  When I attempt to sync a .mov video with an .m4a audio file using ffmpeg like so

  ffmpeg -ss 00:00:2 -i test.m4a  -i test.mov -c:v copy -c:a aac -strict experimental output.mp4

  it works like a charm. But right now I’ve recorded a usability test video using adobe XD, and it returned an .mp4 (MPEG-4) video and I manually recorded the audio using quicktimre returning a .m4a audio file.

  Trying to merge them using ffmpeg is returning a video without any audio :

  ffmpeg -i video.mp4  -i audio.m4a -c:v copy -c:a aac -strict experimental output.mp4
  
  ffmpeg version 4.1 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with Apple LLVM version 10.0.0 (clang-1000.11.45.5)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/4.1_1 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gpl --enable-libmp3lame --enable-libopus --enable-libsnappy --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-opencl --enable-videotoolbox
  
    libavutil      56. 22.100 / 56. 22.100
  
    libavcodec     58. 35.100 / 58. 35.100
  
    libavformat    58. 20.100 / 58. 20.100
  
    libavdevice    58.  5.100 / 58.  5.100
  
    libavfilter     7. 40.101 /  7. 40.101
  
    libavresample   4.  0.  0 /  4.  0.  0
  
    libswscale      5.  3.100 /  5.  3.100
  
    libswresample   3.  3.100 /  3.  3.100
  
    libpostproc    55.  3.100 / 55.  3.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'video.mp4':
  
    Metadata:
  
      major_brand     : qt
  
      minor_version   : 0
  
      compatible_brands: qt
  
      creation_time   : 2019-07-31T14:43:18.000000Z
  
      com.apple.quicktime.make: Apple
  
      com.apple.quicktime.model: MacBookPro15,1
  
      com.apple.quicktime.software: Mac OS X 10.14.5 (18F203)
  
      com.apple.quicktime.creationdate: 2019-07-31T17:43:17+0300
  
    Duration: 00:03:46.05, start: 0.000000, bitrate: 498 kb/s
  
      Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 374x812 [SAR 1:1 DAR 187:406], 390 kb/s, 60 fps, 60 tbr, 6k tbn, 12k tbc (default)
  
      Metadata:
  
        creation_time   : 2019-07-31T14:43:18.000000Z
  
        handler_name    : Core Media Video
  
        encoder         : H.264
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 8000 Hz, stereo, fltp, 0 kb/s (default)
  
      Metadata:
  
        creation_time   : 2019-07-31T14:43:18.000000Z
  
        handler_name    : Core Media Audio
  
  Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'audio.m4a':
  
    Metadata:
  
      major_brand     : M4A
  
      minor_version   : 0
  
      compatible_brands: M4A mp42isom
  
      creation_time   : 2019-07-31T14:47:26.000000Z
  
      iTunSMPB        :  00000000 00000840 00000000 00000000009DFBC0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
  
    Duration: 00:03:54.78, start: 0.047891, bitrate: 225 kb/s
  
      Stream #1:0(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 224 kb/s (default)
  
      Metadata:
  
        creation_time   : 2019-07-31T14:47:26.000000Z
  
        handler_name    : Core Media Audio
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
    Stream #0:1 -> #0:1 (aac (native) -> aac (native))
  
  Press [q] to stop, [?] for help
  
  [aac @ 0x7fb5a4806a00] Too many bits 16384.000000 > 12288 per frame requested, clamping to max
  
  Output #0, mp4, to 'output.mp4':
  
    Metadata:
  
      major_brand     : qt
  
      minor_version   : 0
  
      compatible_brands: qt
  
      com.apple.quicktime.creationdate: 2019-07-31T17:43:17+0300
  
      com.apple.quicktime.make: Apple
  
      com.apple.quicktime.model: MacBookPro15,1
  
      com.apple.quicktime.software: Mac OS X 10.14.5 (18F203)
  
      encoder         : Lavf58.20.100
  
      Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 374x812 [SAR 1:1 DAR 187:406], q=2-31, 390 kb/s, 60 fps, 60 tbr, 12k tbn, 6k tbc (default)
  
      Metadata:
  
        creation_time   : 2019-07-31T14:43:18.000000Z
  
        handler_name    : Core Media Video
  
        encoder         : H.264
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 8000 Hz, stereo, fltp, 96 kb/s (default)
  
      Metadata:
  
        creation_time   : 2019-07-31T14:43:18.000000Z
  
        handler_name    : Core Media Audio
  
        encoder         : Lavc58.35.100 aac
  
  frame=13563 fps=0.0 q=-1.0 Lsize=   10903kB time=00:03:46.08 bitrate= 395.1kbits/s speed= 916x
  
  video:10699kB audio:10kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.805767%

  How can I get around this limitation ?

• How to enable hardware support for H.264 encoding on raspberry Pi 4B

  24 mars 2021, par MSD Paul

  I am trying to enable the hardware support for H264 encoding on raspberry pi 4B model. Compiling FFmpeg source enabling the configurations

  



  sudo ./configure --arch=armel --target-os=linux --enable-gpl --enable-omx --enable-omx-rpi --enable-nonfree


  



  following the link, https://github.com/legotheboss/YouTube-files/wiki/(RPi)-Compile-FFmpeg-with-the-OpenMAX-H.264-GPU-acceleration

  



  but while executing the encoding command after building and installing the ffmpeg with those configuration properly, I am getting the following error

  



  [h264_omx @ 0x156b6e0] Using OMX.broadcom.video_encode
[h264_omx @ 0x156b6e0] OMX error 80001000
[h264_omx @ 0x156b6e0] err 80001018 (-2147479528) on line 561
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!


  



  command used :

  



  ffmpeg -i /media/pi/pic_1_org.png -c:v h264_omx -c:a copy -b:v 1500k outputfile.mp4


  



  I just want to encode a single 4K image into a .mp4 file using H.264 encoder. 
Please let me know how to resolve this issue ?