[Cin] libavcodec usage inside Cinelerra-GG [LONG]

2 Nov 2019

      Hello, developers and users of libav!

I'm a bit of user (more tester than serious user) of video editing software called Cinelerra-GG

This is evolution of original Cinlerrra NLE, and current version uses ffmpeg/libavcodec 4.2

From manual available at https://cinelerra-gg.org/download/ (see CinelerraGG_manual_WIP.pdf)
I found important (IMO) passage I wish to share to relevant list:

p. 193:

Outstanding Issues with ffmpeg: There are some problems that need to be ad-
     dressed by the ffmpeg developer group that adversely affect Cinelerra. These
     are stated below with the hopes that that group will ﬁx them as time permits.

• Make all the default parameters operational. When they are not, the
  Cinelerra plugins can’t be initialized since the initial state of the ﬁlter
  is not operational. If that is not possible, then provide a set of nominal
  parameters for each plugin, so that they can be used as the plugins
  initial default state.
• Make the ﬁlter conﬁg function project the new parameter data into
  the ﬁlter function at any point during ﬁlter operation. This is so that
  continuous updates can be done as the plugin operates.
• Improve seek codec restarts. The past predictor must be reset or recon-
  structed after a seek. The only documented way to seek is open/seek/-
  play. Reopening the format layer is very expensive.

I think I can also link in https://www.cinelerra-gg.org/bugtracker/view.php?id=330
because IMO it shows how wild timestamp can ruin synchro

I also found some other interesting areas of interaction between 
libavcodec/libavformat and Cinelerra, for example timecode tracks in MOV container

I tested ffmpeg itself and it indeed was able to to put tcmd track into MOV,
while DV encapsulated in AVI (type 1) was not showing it at least from ffprobe. 

So, I just extracted raw DV from AVI container, and tested this with ffprobe, and then
re-wrapped DV into mov (using example from ffmpeg's bugtracker)

ffmpeg -i  /home/guest/botva/Downloads/from_Vladimir/Leningrad\ dolphinarium\ 29\ 10\ 2004/UD\ 2004\ 10\ 29\ 01.avi -codec copy  DV.dv  

ffmpeg -i DV.dv -c copy  1.mov

ffmpeg -i 1.mov -metadata:s:v:0 reel_name=ABCDEF -codec copy 2.mov
ffmpeg version 2.8.15 Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 5.5.0 (GCC)
  configuration: --arch=i486 --target-os=linux --prefix=/usr --libdir=/usr/lib --mandir=/usr/man --docdir=/usr/doc/ffmpeg-2.8.15 --enable-gpl --enable-version3 --disable-static --enable-shared --enable-runtime-cpudetect --enable-ffmpeg --enable-ffplay --enable-ffprobe --enable-ffserver --enable-doc --enable-avdevice --enable-avcodec --enable-avformat --enable-avutil --enable-swresample --enable-swscale --enable-postproc --enable-avfilter --enable-avresample --enable-pthreads --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-ladspa --enable-libass --enable-libbluray --disable-libbs2b --disable-libcaca --disable-libcelt --enable-libcdio --disable-libdc1394 --disable-libflite --enable-libfreetype --enable-libfribidi --disable-libgme --enable-libgsm --enable-libiec61883 --disable-libilbc --disable-libkvazaar --disable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --disable-libpulse --disable-libquvi --enable-librtmp --enable-libschroedinger --enable-libsmbclient --enable-libsnappy --disable-libsoxr --enable-libspeex --disable-libssh --enable-libtheora --enable-libtwolame --enable-libv4l2 --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxcb --enable-libxvid --enable-libzvbi --enable-lzma --enable-openal --enable-opengl --enable-sdl --enable-x11grab --enable-zlib --disable-debug
  libavutil      54. 31.100 / 54. 31.100
  libavcodec     56. 60.100 / 56. 60.100
  libavformat    56. 40.101 / 56. 40.101
  libavdevice    56.  4.100 / 56.  4.100
  libavfilter     5. 40.101 /  5. 40.101
  libavresample   2.  1.  0 /  2.  1.  0
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  2.101 /  1.  2.101
  libpostproc    53.  3.100 / 53.  3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '1.mov':
  Metadata:
    major_brand     : qt
    minor_version   : 512
    compatible_brands: qt
    encoder         : Lavf56.40.101
  Duration: 00:01:14.56, start: 0.000000, bitrate: 30337 kb/s
    Stream #0:0(eng): Video: dvvideo (dvcp / 0x70637664), yuv420p, 720x576 [SAR 16:15 DAR 4:3], 28800 kb/s, 25 fps, 25 tbr, 12800 tbn, 25 tbc (default)
    Metadata:
      handler_name    : DataHandler
      timecode        : 00:00:00:00
    Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, stereo, s16, 1536 kb/s (default)
    Metadata:
      handler_name    : DataHandler
    Stream #0:2(eng): Data: none (tmcd / 0x64636D74)
    Metadata:
      handler_name    : DataHandler
      timecode        : 00:00:00:00
[mov @ 0x8f395a0] Codec for stream 0 does not use global headers but container format requires global headers
[mov @ 0x8f395a0] Codec for stream 1 does not use global headers but container format requires global headers
Output #0, mov, to '2.mov':
  Metadata:
    major_brand     : qt
    minor_version   : 512
    compatible_brands: qt
    encoder         : Lavf56.40.101
    Stream #0:0(eng): Video: dvvideo (dvcp / 0x70637664), yuv420p, 720x576 [SAR 16:15 DAR 4:3], q=2-31, 28800 kb/s, 25 fps, 25 tbr, 12800 tbn, 12800 tbc (default)
    Metadata:
      handler_name    : DataHandler
      timecode        : 00:00:00:00
      reel_name       : ABCDEF
    Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, stereo, 1536 kb/s (default)
    Metadata:
      handler_name    : DataHandler
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
frame= 1864 fps=0.0 q=-1.0 Lsize=  276121kB time=00:01:14.56 bitrate=30337.8kbits/s
video:262125kB audio:13980kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.005956%

guest@slax:/dev/shm$ ffprobe -show_stream 2.mov
ffprobe version 2.8.15 Copyright (c) 2007-2018 the FFmpeg developers
  built with gcc 5.5.0 (GCC)
  configuration: --arch=i486 --target-os=linux --prefix=/usr --libdir=/usr/lib --mandir=/usr/man --docdir=/usr/doc/ffmpeg-2.8.15 --enable-gpl --enable-version3 --disable-static --enable-shared --enable-runtime-cpudetect --enable-ffmpeg --enable-ffplay --enable-ffprobe --enable-ffserver --enable-doc --enable-avdevice --enable-avcodec --enable-avformat --enable-avutil --enable-swresample --enable-swscale --enable-postproc --enable-avfilter --enable-avresample --enable-pthreads --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-ladspa --enable-libass --enable-libbluray --disable-libbs2b --disable-libcaca --disable-libcelt --enable-libcdio --disable-libdc1394 --disable-libflite --enable-libfreetype --enable-libfribidi --disable-libgme --enable-libgsm --enable-libiec61883 --disable-libilbc --disable-libkvazaar --disable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --disable-libpulse --disable-libquvi --enable-librtmp --enable-libschroedinger --enable-libsmbclient --enable-libsnappy --disable-libsoxr --enable-libspeex --disable-libssh --enable-libtheora --enable-libtwolame --enable-libv4l2 --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxcb --enable-libxvid --enable-libzvbi --enable-lzma --enable-openal --enable-opengl --enable-sdl --enable-x11grab --enable-zlib --disable-debug
  libavutil      54. 31.100 / 54. 31.100
  libavcodec     56. 60.100 / 56. 60.100
  libavformat    56. 40.101 / 56. 40.101
  libavdevice    56.  4.100 / 56.  4.100
  libavfilter     5. 40.101 /  5. 40.101
  libavresample   2.  1.  0 /  2.  1.  0
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  2.101 /  1.  2.101
  libpostproc    53.  3.100 / 53.  3.100
Failed to set value '2.mov' for option 'show_stream': Option not found

guest@slax:/dev/shm$ ffprobe -show_format 2.mov
ffprobe version 2.8.15 Copyright (c) 2007-2018 the FFmpeg developers
  built with gcc 5.5.0 (GCC)
  configuration: --arch=i486 --target-os=linux --prefix=/usr --libdir=/usr/lib --mandir=/usr/man --docdir=/usr/doc/ffmpeg-2.8.15 --enable-gpl --enable-version3 --disable-static --enable-shared --enable-runtime-cpudetect --enable-ffmpeg --enable-ffplay --enable-ffprobe --enable-ffserver --enable-doc --enable-avdevice --enable-avcodec --enable-avformat --enable-avutil --enable-swresample --enable-swscale --enable-postproc --enable-avfilter --enable-avresample --enable-pthreads --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-ladspa --enable-libass --enable-libbluray --disable-libbs2b --disable-libcaca --disable-libcelt --enable-libcdio --disable-libdc1394 --disable-libflite --enable-libfreetype --enable-libfribidi --disable-libgme --enable-libgsm --enable-libiec61883 --disable-libilbc --disable-libkvazaar --disable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --disable-libpulse --disable-libquvi --enable-librtmp --enable-libschroedinger --enable-libsmbclient --enable-libsnappy --disable-libsoxr --enable-libspeex --disable-libssh --enable-libtheora --enable-libtwolame --enable-libv4l2 --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxcb --enable-libxvid --enable-libzvbi --enable-lzma --enable-openal --enable-opengl --enable-sdl --enable-x11grab --enable-zlib --disable-debug
  libavutil      54. 31.100 / 54. 31.100
  libavcodec     56. 60.100 / 56. 60.100
  libavformat    56. 40.101 / 56. 40.101
  libavdevice    56.  4.100 / 56.  4.100
  libavfilter     5. 40.101 /  5. 40.101
  libavresample   2.  1.  0 /  2.  1.  0
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  2.101 /  1.  2.101
  libpostproc    53.  3.100 / 53.  3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '2.mov':
  Metadata:
    major_brand     : qt
    minor_version   : 512
    compatible_brands: qt
    encoder         : Lavf56.40.101
  Duration: 00:01:14.56, start: 0.000000, bitrate: 30337 kb/s
    Stream #0:0(eng): Video: dvvideo (dvcp / 0x70637664), yuv420p, 720x576 [SAR 16:15 DAR 4:3], 28800 kb/s, 25 fps, 25 tbr, 12800 tbn, 25 tbc (default)
    Metadata:
      handler_name    : DataHandler
      timecode        : 00:00:00:00
    Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, stereo, s16, 1536 kb/s (default)
    Metadata:
      handler_name    : DataHandler
    Stream #0:2(eng): Data: none (tmcd / 0x64636D74)
    Metadata:
      handler_name    : DataHandler
      reel_name       : ABCDEF
      timecode        : 00:00:00:00
Unsupported codec with id 0 for input stream 2
[FORMAT]
filename=2.mov
nb_streams=3
nb_programs=0
format_name=mov,mp4,m4a,3gp,3g2,mj2
format_long_name=QuickTime / MOV
start_time=0.000000
duration=74.560000
size=282748359
bit_rate=30337806
probe_score=100
TAG:major_brand=qt
TAG:minor_version=512
TAG:compatible_brands=qt
TAG:encoder=Lavf56.40.101
[/FORMAT]
guest@slax:/dev/shm$ rm 2.mov

guest@slax:/dev/shm$ ffmpeg -i 1.mov -timecode 01:02:03:04 -metadata:s:v:0 reel_name=ABCDEF -codec copy 2.mov
ffmpeg version 2.8.15 Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 5.5.0 (GCC)
  configuration: --arch=i486 --target-os=linux --prefix=/usr --libdir=/usr/lib --mandir=/usr/man --docdir=/usr/doc/ffmpeg-2.8.15 --enable-gpl --enable-version3 --disable-static --enable-shared --enable-runtime-cpudetect --enable-ffmpeg --enable-ffplay --enable-ffprobe --enable-ffserver --enable-doc --enable-avdevice --enable-avcodec --enable-avformat --enable-avutil --enable-swresample --enable-swscale --enable-postproc --enable-avfilter --enable-avresample --enable-pthreads --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-ladspa --enable-libass --enable-libbluray --disable-libbs2b --disable-libcaca --disable-libcelt --enable-libcdio --disable-libdc1394 --disable-libflite --enable-libfreetype --enable-libfribidi --disable-libgme --enable-libgsm --enable-libiec61883 --disable-libilbc --disable-libkvazaar --disable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --disable-libpulse --disable-libquvi --enable-librtmp --enable-libschroedinger --enable-libsmbclient --enable-libsnappy --disable-libsoxr --enable-libspeex --disable-libssh --enable-libtheora --enable-libtwolame --enable-libv4l2 --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxcb --enable-libxvid --enable-libzvbi --enable-lzma --enable-openal --enable-opengl --enable-sdl --enable-x11grab --enable-zlib --disable-debug
  libavutil      54. 31.100 / 54. 31.100
  libavcodec     56. 60.100 / 56. 60.100
  libavformat    56. 40.101 / 56. 40.101
  libavdevice    56.  4.100 / 56.  4.100
  libavfilter     5. 40.101 /  5. 40.101
  libavresample   2.  1.  0 /  2.  1.  0
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  2.101 /  1.  2.101
  libpostproc    53.  3.100 / 53.  3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '1.mov':
  Metadata:
    major_brand     : qt
    minor_version   : 512
    compatible_brands: qt
    encoder         : Lavf56.40.101
  Duration: 00:01:14.56, start: 0.000000, bitrate: 30337 kb/s
    Stream #0:0(eng): Video: dvvideo (dvcp / 0x70637664), yuv420p, 720x576 [SAR 16:15 DAR 4:3], 28800 kb/s, 25 fps, 25 tbr, 12800 tbn, 25 tbc (default)
    Metadata:
      handler_name    : DataHandler
      timecode        : 00:00:00:00
    Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, stereo, s16, 1536 kb/s (default)
    Metadata:
      handler_name    : DataHandler
    Stream #0:2(eng): Data: none (tmcd / 0x64636D74)
    Metadata:
      handler_name    : DataHandler
      timecode        : 00:00:00:00
[mov @ 0x81334c0] Codec for stream 0 does not use global headers but container format requires global headers
[mov @ 0x81334c0] Codec for stream 1 does not use global headers but container format requires global headers
Output #0, mov, to '2.mov':
  Metadata:
    major_brand     : qt
    minor_version   : 512
    compatible_brands: qt
    timecode        : 01:02:03:04
    encoder         : Lavf56.40.101
    Stream #0:0(eng): Video: dvvideo (dvcp / 0x70637664), yuv420p, 720x576 [SAR 16:15 DAR 4:3], q=2-31, 28800 kb/s, 25 fps, 25 tbr, 12800 tbn, 12800 tbc (default)
    Metadata:
      handler_name    : DataHandler
      timecode        : 00:00:00:00
      reel_name       : ABCDEF
    Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, stereo, 1536 kb/s (default)
    Metadata:
      handler_name    : DataHandler
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
frame= 1864 fps=0.0 q=-1.0 Lsize=  276121kB time=00:01:14.56 bitrate=30337.8kbits/s
video:262125kB audio:13980kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.005956%

guest@slax:/dev/shm$ ffprobe -show_format 2.mov
ffprobe version 2.8.15 Copyright (c) 2007-2018 the FFmpeg developers
  built with gcc 5.5.0 (GCC)
  configuration: --arch=i486 --target-os=linux --prefix=/usr --libdir=/usr/lib --mandir=/usr/man --docdir=/usr/doc/ffmpeg-2.8.15 --enable-gpl --enable-version3 --disable-static --enable-shared --enable-runtime-cpudetect --enable-ffmpeg --enable-ffplay --enable-ffprobe --enable-ffserver --enable-doc --enable-avdevice --enable-avcodec --enable-avformat --enable-avutil --enable-swresample --enable-swscale --enable-postproc --enable-avfilter --enable-avresample --enable-pthreads --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-ladspa --enable-libass --enable-libbluray --disable-libbs2b --disable-libcaca --disable-libcelt --enable-libcdio --disable-libdc1394 --disable-libflite --enable-libfreetype --enable-libfribidi --disable-libgme --enable-libgsm --enable-libiec61883 --disable-libilbc --disable-libkvazaar --disable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --disable-libpulse --disable-libquvi --enable-librtmp --enable-libschroedinger --enable-libsmbclient --enable-libsnappy --disable-libsoxr --enable-libspeex --disable-libssh --enable-libtheora --enable-libtwolame --enable-libv4l2 --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxcb --enable-libxvid --enable-libzvbi --enable-lzma --enable-openal --enable-opengl --enable-sdl --enable-x11grab --enable-zlib --disable-debug
  libavutil      54. 31.100 / 54. 31.100
  libavcodec     56. 60.100 / 56. 60.100
  libavformat    56. 40.101 / 56. 40.101
  libavdevice    56.  4.100 / 56.  4.100
  libavfilter     5. 40.101 /  5. 40.101
  libavresample   2.  1.  0 /  2.  1.  0
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  2.101 /  1.  2.101
  libpostproc    53.  3.100 / 53.  3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '2.mov':
  Metadata:
    major_brand     : qt
    minor_version   : 512
    compatible_brands: qt
    encoder         : Lavf56.40.101
  Duration: 00:01:14.56, start: 0.000000, bitrate: 30337 kb/s
    Stream #0:0(eng): Video: dvvideo (dvcp / 0x70637664), yuv420p, 720x576 [SAR 16:15 DAR 4:3], 28800 kb/s, 25 fps, 25 tbr, 12800 tbn, 25 tbc (default)
    Metadata:
      handler_name    : DataHandler
      timecode        : 01:02:03:04
    Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, stereo, s16, 1536 kb/s (default)
    Metadata:
      handler_name    : DataHandler
    Stream #0:2(eng): Data: none (tmcd / 0x64636D74)
    Metadata:
      handler_name    : DataHandler
      reel_name       : ABCDEF
      timecode        : 01:02:03:04
Unsupported codec with id 0 for input stream 2
[FORMAT]
filename=2.mov
nb_streams=3
nb_programs=0
format_name=mov,mp4,m4a,3gp,3g2,mj2
format_long_name=QuickTime / MOV
start_time=0.000000
duration=74.560000
size=282748359
bit_rate=30337806
probe_score=100
TAG:major_brand=qt
TAG:minor_version=512
TAG:compatible_brands=qt
TAG:encoder=Lavf56.40.101
[/FORMAT]

mediainfo 2.mov
General
Complete name                            : 2.mov
Format                                   : MPEG-4
Commercial name                          : DVCPRO
Format profile                           : QuickTime
Codec ID                                 : qt   0000.02 (qt  )
File size                                : 270 MiB
Duration                                 : 1 min 14 s
Overall bit rate                         : 30.3 Mb/s
Recorded date                            : 1970-01-01 00:00:00.000
Writing application                      : Lavf56.40.101

Video
ID                                       : 1
Format                                   : DV
Commercial name                          : DVCPRO
Codec ID                                 : dvcp
Duration                                 : 1 min 14 s
Bit rate mode                            : Constant
Bit rate                                 : 24.4 Mb/s
Encoded bit rate                         : 28.8 Mb/s
Width                                    : 720 pixels
Height                                   : 576 pixels
Display aspect ratio                     : 4:3
Frame rate mode                          : Constant
Frame rate                               : 25.000 FPS
Standard                                 : PAL
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Interlaced
Scan order                               : Bottom Field First
Compression mode                         : Lossy
Bits/(Pixel*Frame)                       : 2.357
Time code of first frame                 : 00:00:00:00
Time code source                         : Subcode time code
Stream size                              : 217 MiB (81%)
Encoded stream size                      : 256 MiB (95%)
Encoding settings                        : ae mode=manual / wb mode=automatic / white balance= / fcm=manual focus
Language                                 : English

Audio #1
ID                                       : 2
Format                                   : PCM
Format settings                          : Little / Signed
Codec ID                                 : sowt
Duration                                 : 1 min 14 s
Bit rate mode                            : Constant
Bit rate                                 : 1 536 kb/s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 48.0 kHz
Bit depth                                : 16 bits
Stream size                              : 13.7 MiB (5%)
Language                                 : English
Default                                  : Yes
Alternate group                          : 1

Audio #2
ID                                       : 1-0
Format                                   : PCM
Muxing mode                              : DV
Muxing mode, more info                   : Muxed in Video #1
Duration                                 : 1 min 14 s
Bit rate mode                            : Constant
Bit rate                                 : 1 536 kb/s
Encoded bit rate                         : 0 b/s
Channel(s)                               : 2 channels
Sampling rate                            : 48.0 kHz
Bit depth                                : 16 bits
Delay relative to video                  : -1 h 2 min
Stream size                              : 13.7 MiB (5%)
Encoded stream size                      : 0.00 Byte (0%)

Other
ID                                       : 3
Type                                     : Time code
Format                                   : QuickTime TC
Duration                                 : 1 min 14 s
Time code of first frame                 : 01:02:03:04
Time code, striped                       : Yes
Title                                    : ABCDEF
Language                                 : English
Default                                  : No

guest@slax:/dev/shm$ ffprobe -show_streams 2.mov
ffprobe version 2.8.15 Copyright (c) 2007-2018 the FFmpeg developers
  built with gcc 5.5.0 (GCC)
  configuration: --arch=i486 --target-os=linux --prefix=/usr --libdir=/usr/lib --mandir=/usr/man --docdir=/usr/doc/ffmpeg-2.8.15 --enable-gpl --enable-version3 --disable-static --enable-shared --enable-runtime-cpudetect --enable-ffmpeg --enable-ffplay --enable-ffprobe --enable-ffserver --enable-doc --enable-avdevice --enable-avcodec --enable-avformat --enable-avutil --enable-swresample --enable-swscale --enable-postproc --enable-avfilter --enable-avresample --enable-pthreads --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-ladspa --enable-libass --enable-libbluray --disable-libbs2b --disable-libcaca --disable-libcelt --enable-libcdio --disable-libdc1394 --disable-libflite --enable-libfreetype --enable-libfribidi --disable-libgme --enable-libgsm --enable-libiec61883 --disable-libilbc --disable-libkvazaar --disable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --disable-libpulse --disable-libquvi --enable-librtmp --enable-libschroedinger --enable-libsmbclient --enable-libsnappy --disable-libsoxr --enable-libspeex --disable-libssh --enable-libtheora --enable-libtwolame --enable-libv4l2 --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxcb --enable-libxvid --enable-libzvbi --enable-lzma --enable-openal --enable-opengl --enable-sdl --enable-x11grab --enable-zlib --disable-debug
  libavutil      54. 31.100 / 54. 31.100
  libavcodec     56. 60.100 / 56. 60.100
  libavformat    56. 40.101 / 56. 40.101
  libavdevice    56.  4.100 / 56.  4.100
  libavfilter     5. 40.101 /  5. 40.101
  libavresample   2.  1.  0 /  2.  1.  0
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  2.101 /  1.  2.101
  libpostproc    53.  3.100 / 53.  3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '2.mov':
  Metadata:
    major_brand     : qt
    minor_version   : 512
    compatible_brands: qt
    encoder         : Lavf56.40.101
  Duration: 00:01:14.56, start: 0.000000, bitrate: 30337 kb/s
    Stream #0:0(eng): Video: dvvideo (dvcp / 0x70637664), yuv420p, 720x576 [SAR 16:15 DAR 4:3], 28800 kb/s, 25 fps, 25 tbr, 12800 tbn, 25 tbc (default)
    Metadata:
      handler_name    : DataHandler
      timecode        : 01:02:03:04
    Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, stereo, s16, 1536 kb/s (default)
    Metadata:
      handler_name    : DataHandler
    Stream #0:2(eng): Data: none (tmcd / 0x64636D74)
    Metadata:
      handler_name    : DataHandler
      reel_name       : ABCDEF
      timecode        : 01:02:03:04
Unsupported codec with id 0 for input stream 2
[STREAM]
index=0
codec_name=dvvideo
codec_long_name=DV (Digital Video)
profile=unknown
codec_type=video
codec_time_base=1/25
codec_tag_string=dvcp
codec_tag=0x70637664
width=720
height=576
coded_width=720
coded_height=576
has_b_frames=0
sample_aspect_ratio=16:15
display_aspect_ratio=4:3
pix_fmt=yuv420p
level=-99
color_range=N/A
color_space=unknown
color_transfer=unknown
color_primaries=unknown
chroma_location=topleft
timecode=N/A
refs=1
id=N/A
r_frame_rate=25/1
avg_frame_rate=25/1
time_base=1/12800
start_pts=0
start_time=0.000000
duration_ts=954368
duration=74.560000
bit_rate=28800000
max_bit_rate=N/A
bits_per_raw_sample=N/A
nb_frames=1864
nb_read_frames=N/A
nb_read_packets=N/A
DISPOSITION:default=1
DISPOSITION:dub=0
DISPOSITION:original=0
DISPOSITION:comment=0
DISPOSITION:lyrics=0
DISPOSITION:karaoke=0
DISPOSITION:forced=0
DISPOSITION:hearing_impaired=0
DISPOSITION:visual_impaired=0
DISPOSITION:clean_effects=0
DISPOSITION:attached_pic=0
TAG:language=eng
TAG:handler_name=DataHandler
TAG:timecode=01:02:03:04
[/STREAM]
[STREAM]
index=1
codec_name=pcm_s16le
codec_long_name=PCM signed 16-bit little-endian
profile=unknown
codec_type=audio
codec_time_base=1/48000
codec_tag_string=sowt
codec_tag=0x74776f73
sample_fmt=s16
sample_rate=48000
channels=2
channel_layout=stereo
bits_per_sample=16
id=N/A
r_frame_rate=0/0
avg_frame_rate=0/0
time_base=1/48000
start_pts=0
start_time=0.000000
duration_ts=3578880
duration=74.560000
bit_rate=1536000
max_bit_rate=N/A
bits_per_raw_sample=N/A
nb_frames=3578880
nb_read_frames=N/A
nb_read_packets=N/A
DISPOSITION:default=1
DISPOSITION:dub=0
DISPOSITION:original=0
DISPOSITION:comment=0
DISPOSITION:lyrics=0
DISPOSITION:karaoke=0
DISPOSITION:forced=0
DISPOSITION:hearing_impaired=0
DISPOSITION:visual_impaired=0
DISPOSITION:clean_effects=0
DISPOSITION:attached_pic=0
TAG:language=eng
TAG:handler_name=DataHandler
[/STREAM]
[STREAM]
index=2
codec_name=unknown
codec_long_name=unknown
profile=unknown
codec_type=data
codec_time_base=1/25
codec_tag_string=tmcd
codec_tag=0x64636d74
id=N/A
r_frame_rate=0/0
avg_frame_rate=0/0
time_base=1/12800
start_pts=0
start_time=0.000000
duration_ts=954368
duration=74.560000
bit_rate=N/A
max_bit_rate=N/A
bits_per_raw_sample=N/A
nb_frames=1
nb_read_frames=N/A
nb_read_packets=N/A
DISPOSITION:default=0
DISPOSITION:dub=0
DISPOSITION:original=0
DISPOSITION:comment=0
DISPOSITION:lyrics=0
DISPOSITION:karaoke=0
DISPOSITION:forced=0
DISPOSITION:hearing_impaired=0
DISPOSITION:visual_impaired=0
DISPOSITION:clean_effects=0
DISPOSITION:attached_pic=0
TAG:language=eng
TAG:handler_name=DataHandler
TAG:reel_name=ABCDEF
TAG:timecode=01:02:03:04
[/STREAM]

-----------

all this dance just for showing to myself this timecode thing actually exist in DV and can be embedded into MOV (at least)

use-case basically about normal timecode use - multi-camera synchronization, prescie cuts, and alike.

See https://www.cinelerra-gg.org/bugtracker/view.php?id=334 where I collected few links
(basically timecode used in EDL format CMX3600, and this format can be used 
by other programs, like Blender, KDE's NLE, something else ..there are some bugs in CinGG
about frame accuracy ATM [https://www.cinelerra-gg.org/bugtracker/view.php?id=329], but after they are fixed ...

While I'm myself not developer enough for implementing new features
 - i usually dig into docs and come up with something developers can use.

I usually read ffmpeg-devel, but I'm not subscribed to it (due to rel. high traffic there)

I'll be happy to help in communication/testing between two projects.

[Cin] libavcodec usage inside Cinelerra-GG [LONG]

Andrew Randrianasulu