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• Unknown V4L2 pixel format equivalent for yuvj420p

  23 mars 2020, par c10ud

  I am trying to pipe a mp4 video located in Videos/video.mp4 to a virtual webcam device located at /dev/video0.

  I tried running :
  ffmpeg -re -i Videos/video.mp4 -map 0:v -f v4l2 /dev/video0
  and I keep getting the following error :

  [video4linux2,v4l2 @ 0x5580cf270100] Unknown V4L2 pixel format equivalent for yuvj420p
  
  Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
  
  Error initializing output stream 0:0 -- 
  
  Conversion failed!

  Full log :

  ffmpeg version 4.2.2-1+b1 Copyright (c) 2000-2019 the FFmpeg developers
  
    built with gcc 9 (Debian 9.2.1-28)
  
    configuration: --prefix=/usr --extra-version=1+b1 --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 --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  
    libavutil      56. 31.100 / 56. 31.100
  
    libavcodec     58. 54.100 / 58. 54.100
  
    libavformat    58. 29.100 / 58. 29.100
  
    libavdevice    58.  8.100 / 58.  8.100
  
    libavfilter     7. 57.100 /  7. 57.100
  
    libavresample   4.  0.  0 /  4.  0.  0
  
    libswscale      5.  5.100 /  5.  5.100
  
    libswresample   3.  5.100 /  3.  5.100
  
    libpostproc    55.  5.100 / 55.  5.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Videos/video.mp4':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: isommp42
  
      creation_time   : 2020-03-23T04:24:01.000000Z
  
      com.android.version: 8.1.0
  
    Duration: 00:01:00.14, start: 0.000000, bitrate: 20048 kb/s
  
      Stream #0:0(eng): Video: h264 (Baseline) (avc1 / 0x31637661), yuvj420p(pc, smpte170m), 1920x1080, 19898 kb/s, SAR 1:1 DAR 16:9, 29.43 fps, 29.58 tbr, 90k tbn, 180k tbc (default)
  
      Metadata:
  
        rotate          : 270
  
        creation_time   : 2020-03-23T04:24:01.000000Z
  
        handler_name    : VideoHandle
  
      Side data:
  
        displaymatrix: rotation of 90.00 degrees
  
      Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 96 kb/s (default)
  
      Metadata:
  
        creation_time   : 2020-03-23T04:24:01.000000Z
  
        handler_name    : SoundHandle
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> rawvideo (native))
  
  Press [q] to stop, [?] for help
  
  [video4linux2,v4l2 @ 0x5580cf270100] Unknown V4L2 pixel format equivalent for yuvj420p
  
  Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
  
  Error initializing output stream 0:0 -- 
  
  Conversion failed!

  The desired result is that the mp4 video is seen by apps that try to view the webcam. I am running this on a desktop without a webcam or video interface, which is why I am using /dev/video0

• SVT-AV1 Vertical 4k video

  14 avril 2020, par Dmitry Maksakov

  I have a vertical 4k video captured on my phone with the following parameters (ffprobe) :

  



  Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709/bt709/smpte170m), 3840x2160, 71980 kb/s, SAR 1:1 DAR 16:9, 59.96 fps, 60 tbr, 90k tbn, 180k tbc (default)
Metadata:
  rotate          : 90
  creation_time   : 2020-04-03T17:17:11.000000Z
  handler_name    : VideoHandle
Side data:
  displaymatrix: rotation of -90.00 degrees


  



  When I try to transcode it to av1 with svt_av1

  



  ffmpeg -i video.mp4 -c:v libsvt_av1 -y output.webm


  



  I am getting

  



  Error instance 1: Source Height must be less than 2160
[libsvt_av1 @ 0x5614a858c400] Error setting encoder parameters: bad parameter (0x80001005)
Segmentation fault


  



  How could I encode such videos ?

  


• laravel-ffmpeg - fopen(/tmp/laravel-ffmpegi340VY.mkv) : failed to open stream : No such file or directory

  26 janvier 2020, par jyoti gautam

  Using the laravel-ffmpeg librabry to convert video file from .webm to mp4 aws s3 bucket url and using following code.

  $videoFile = '/courses/images/1579626678msr-2020-01-21T17-11-18-771Z.webm';  //= upload/video1.mp4
  
     FFMpeg::fromDisk('s3')
  
      ->open($videoFile)
  
      ->getFrameFromSeconds(10)
  
      ->export()
  
      ->toDisk('s3')
  
      ->inFormat(new \FFMpeg\Format\Video\X264)
  
      ->save('small_steve.mp4');

  How can access file from s3 bucket and convert ?