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• lavf/qsv_vpp : add frame format option

  31 mai 2019, par Zhong Li

  lavf/qsv_vpp : add frame format option
  1. Currently output format is hard-coded as NV12, thus means
  
     CSC is always done for not NV12 input such as P010.
  
     Follow original input format as default output.
  
  2. Add an option to specify output format.
  Signed-off-by : Zhong Li <zhong.li@intel.com>
  

  • [DH] libavfilter/vf_vpp_qsv.c

• FFMPEG - format not available ?

  26 octobre 2020, par Julien Greard

  I'm converting some code from FFMPEG 0.8 to FFMPEG 1.2. I have an error during the call to the method avcodec_open2() :

  


  Specified pixel format %s is invalid or not supported


  


  The format I use is : AV_PIX_FMT_RGB24. It should be enabled by default, right ?

  


  Below is my code :

  


  av_register_all();

codec = avcodec_find_encoder(AV_CODEC_ID_MPEG2VIDEO);

if(!codec)
{
    throw SystemException("codec not found");
}

codecContext = avcodec_alloc_context3(codec);

codecContext->bit_rate = 200000;
codecContext->time_base.den = 1;
codecContext->time_base.num = 90000;
codecContext->gop_size = 8;
codecContext->pix_fmt = AV_PIX_FMT_RGB24;

_codecContext->width = 320
_codecContext->height = 240

if(avcodec_open2(_codecContext, _codec, NULL) < 0)
{
    throw SystemException("Unable to open codec");
}


  


• How to fix "Unable to find a suitable output format for '/'" error in ffmpeg running with PHP [on hold]

  4 avril 2019, par C.Pietro

  I want to compress video on the server after the upload.
  I installed correctly ffmpeg and when i run from the command line

   ffmpeg -i input.mp4 -vcodec libx265 -crf 28 -vcodec h264 -acodec aac -strict -2 output.mp4

  it works !

  But if i run the same command from PHP with exec,

  class VideoCompress {
  
      function compress($path, $name){
  
          if (`which ffmpeg`) {
  
              exec("cd \"$path\";ffmpeg -i \"$name\" -vcodec libx265 -crf 28 -vcodec h264 -acodec aac -strict -2 \"bk_$name\" / 2>&1", $o);
  
              print_r8($o);
  
          }
  
      }
  
  }

  it fails and return this error

  Array
  
  (
  
      [0] => ffmpeg version N-48518-g27c94c57dc-static https://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2019 the FFmpeg developers
  
      [1] =>   built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
  
      [2] =>   configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc-6 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp --enable-gray --enable-libaom --enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libdav1d --enable-libxvid --enable-libzvbi --enable-libzimg
  
      [3] =>   libavutil      56. 26.100 / 56. 26.100
  
      [4] =>   libavcodec     58. 48.100 / 58. 48.100
  
      [5] =>   libavformat    58. 26.101 / 58. 26.101
  
      [6] =>   libavdevice    58.  7.100 / 58.  7.100
  
      [7] =>   libavfilter     7. 48.100 /  7. 48.100
  
      [8] =>   libswscale      5.  4.100 /  5.  4.100
  
      [9] =>   libswresample   3.  4.100 /  3.  4.100
  
      [10] =>   libpostproc    55.  4.100 / 55.  4.100
  
      [11] => Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'WebHD_720p.mp4':
  
      [12] =>   Metadata:
  
      [13] =>     major_brand     : isom
  
      [14] =>     minor_version   : 512
  
      [15] =>     compatible_brands: isomiso2avc1mp41
  
      [16] =>     encoder         : Lavf57.71.100
  
      [17] =>   Duration: 00:03:23.22, start: 0.000000, bitrate: 1890 kb/s
  
      [18] =>     Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 9:10 DAR 8:5], 1754 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
  
      [19] =>     Metadata:
  
      [20] =>       handler_name    : VideoHandler
  
      [21] =>     Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
  
      [22] =>     Metadata:
  
      [23] =>       handler_name    : SoundHandler
  
      [24] => [NULL @ 0x59fb100] Unable to find a suitable output format for '/'
  
      [25] => /: Invalid argument
  
  )

  Any idea on how can i fix it ?