Excerpt of my try to use libavformat to pack (mov) movie containers with external CFHD frame encoding

cfencode_libav.cpp

std::string      filename;
AVFormatContext* format_context = NULL;

int32_t          out_height     = 1080;
int32_t          out_width      = 1920;
int32_t          out_framerate  = 24;
AVOutputFormat*  out_format     = nullptr;
AVStream*        out_avstream   = nullptr;


int error;


error = avformat_alloc_output_context2(&format_context, NULL, NULL, filename.c_str());
if (error != 0)
{
    std::cerr << "Unable to create output context" << std::endl;
    std::exit(1);
}
out_format              = clip->_format_context->oformat;
out_format->video_codec = AV_CODEC_ID_CFHD;
num_frames              = 0;

out_avstream = avformat_new_stream(format_context, NULL);
if (clip->_out_avstream == NULL)
{
    std::cerr << "Unable to create output video stream" << std::endl;
    std::exit(1);
}

out_avstream->time_base      = (AVRational){1, 24};
out_avstream->avg_frame_rate = (AVRational){24, 1};
// clip->_out_avstream->time_base.num = 1;
// clip->_out_avstream->time_base.den = 12288;

// clip->_out_avstream->avg_frame_rate.num = 24;
// clip->_out_avstream->avg_frame_rate.den = 1;
out_avstream->r_frame_rate       = clip->_out_avstream->avg_frame_rate;
out_avstream->codec->time_base   = clip->_out_avstream->time_base;


AVCodecParameters* codecpar = out_avstream->codecpar;

codecpar->codec_type     = AVMEDIA_TYPE_VIDEO;
codecpar->codec_id       = AV_CODEC_ID_CFHD;
codecpar->codec_tag      = 1145587267;
codecpar->extradata_size = 0;

switch (mode)
{
    case CineformMode::YUV422:
        codecpar->format = 66;
        break;
    default:
        codecpar->format = 137; // RGB
}

codecpar->bit_rate                = 61389834; //! @todo Correct bitrate information?!
codecpar->bits_per_coded_sample   =  24;
codecpar->bits_per_raw_sample     =  10;
codecpar->profile                 = -99;
codecpar->level                   = -99;
codecpar->width                   = width;
codecpar->height                  = height;
codecpar->sample_aspect_ratio.num = 0;
codecpar->sample_aspect_ratio.den = 1;
codecpar->field_order             = AV_FIELD_PROGRESSIVE;
codecpar->color_range             = AVCOL_RANGE_UNSPECIFIED;
codecpar->color_primaries         = AVCOL_PRI_UNSPECIFIED;
codecpar->color_trc               = AVCOL_TRC_UNSPECIFIED;
codecpar->color_space             = AVCOL_SPC_UNSPECIFIED;
codecpar->chroma_location         = AVCHROMA_LOC_UNSPECIFIED;
codecpar->video_delay             = 0;
codecpar->channel_layout          = 0;
codecpar->channels                = 0;
codecpar->sample_rate             = 0;
codecpar->block_align             = 0;
codecpar->frame_size              = 0;
codecpar->initial_padding         = 0;
codecpar->trailing_padding        = 0;
codecpar->seek_preroll            = 0;


av_dump_format(format_context, 0, filename.c_str(), 1);

error = avio_open(&format_context->pb, filename.c_str(), AVIO_FLAG_WRITE);
if (error < 0)
{
    std::cerr << "Unable to create output file" << std::endl;
    std::exit(1);
}

error = avformat_write_header(format_context, NULL);
if (error < 0)
{
    std::cerr << "Unable to write header" << std::endl;
    std::exit(1);
}



for all frames
{
    int frame  // number of the current frame
    uint16_t* img_data // is filled with the data for the current frame

    void*  frame_data;  // will contain the compressed data returned by cineformsdk
    size_t frame_data_size;  // size of frame_data

    // cfhd_handler is a wrapper class that encapsulates the cineformSDK
    if (cfhd_handler->encodeCfhdFrame(&frame_data, frame_data_size, img_data,
                                      out_height, out_width, frame))
    {
        std::cout << "Frame compressed. Frame: " << frame << ", compressed_size: " << frame_data_size << std::endl;
    }
    else
    {
        std::cerr << "Failed to compress frame" << std::endl;
        std::exit(1);
    }

    AVRational tc;
    tc.num = frame;
    tc.den = out_framerate;

    AVPacket pkg;
    pkg.buf             = NULL;
    pkg.pts             = frame;
    pkg.dts             = frame;
    pkg.data            = reinterpret_cast<uint8_t*>(frame_data);
    pkg.size            = frame_data_size;
    pkg.stream_index    = out_avstream->index;
    pkg.flags           = 0;
    pkg.side_data       = NULL;
    pkg.side_data_elems = 0;
    pkg.duration        = 0;
    pkg.pos             = -1;

    error = av_interleaved_write_frame(format_context, &pkg);
    if (error < 0)
    {
        std::cerr << "Unable to write frame to stream" << std::endl;
        std::exit(1);
    }

    num_frames++;
}


av_write_trailer(format_context);
avio_closep(&format_context->pb);
avformat_free_context(format_context);

ffmpeg

..$ ffmpeg -i testinput.mov
ffmpeg version 4.2.1-0york0~18.04.1 Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.4.0-1ubuntu1~18.04.1)
  configuration: --prefix=/usr --extra-version='0york0~18.04.1' --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-opengl --enable-sdl2 --enable-nonfree --enable-libfdk-aac --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 'cineform_burnin.mov':
  Metadata:
    major_brand     : qt  
    minor_version   : 512
    compatible_brands: qt  
    encoder         : Lavf57.25.100
  Duration: 00:01:07.33, start: 0.000000, bitrate: 287108 kb/s
    Stream #0:0(eng): Video: cfhd (CFHD / 0x44484643), gbrp12le(10 bpc, bt709, progressive), 1920x1080, 287106 kb/s, SAR 1:1 DAR 16:9, 24 fps, 24 tbr, 12288 tbn, 12288 tbc (default)
    Metadata:
      handler_name    : VideoHandler
      encoder         : GoPro CineForm RGB 16-bit
      timecode        : 01:00:00:00
    Stream #0:1(eng): Data: none (tmcd / 0x64636D74)
    Metadata:
      handler_name    : TimeCodeHandler
      timecode        : 01:00:00:00
At least one output file must be specified

================================================

..$ ffmpeg -i testoutput.mov
ffmpeg version 4.2.1-0york0~18.04.1 Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.4.0-1ubuntu1~18.04.1)
  configuration: --prefix=/usr --extra-version='0york0~18.04.1' --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-opengl --enable-sdl2 --enable-nonfree --enable-libfdk-aac --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 'testout.mov':
  Metadata:
    major_brand     : qt  
    minor_version   : 512
    compatible_brands: qt  
    encoder         : Lavf58.29.100
  Duration: 00:00:00.04, start: 0.000000, bitrate: 817533 kb/s
    Stream #0:0: Video: cfhd (CFHD / 0x44484643), gbrp12le(10 bpc, progressive), 1920x1080, 817538 kb/s, 119.07 fps, 12288 tbr, 12288 tbn, 12288 tbc (default)
    Metadata:
      handler_name    : VideoHandler
At least one output file must be specified