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• avcodec/nvenc : always output picture timing SEI

  2 septembre 2017, par Timo Rothenpieler

  avcodec/nvenc : always output picture timing SEI
  Interlaced encoding profits from it, or might even need it in some
  
  players.
  
  No harm in enabling it unconditionally.
  Signed-off-by : Timo Rothenpieler <timo@rothenpieler.org>
  

  • [DH] libavcodec/nvenc.c

• Dolby Vision Mp4 to HLS Stream

  23 avril 2022, par goodkid38

  Is it possible to create a dolby vision HLS stream with ffmpeg ? I have tried online tutorials such as this one https://codecalamity.com/encoding-uhd-4k-hdr10-videos-with-ffmpeg/#saving-dolby-vision but I have not seen any success. I either get hevc files with no dv from tsmuxer, invalid rpu files or the Skipping NAL unit 63 message from ffmpeg. Here is the current ffmpeg command I'm testing to at least get an hevc with dolby vision

  


  ffmpeg -i input.mp4 -c:v copy -f hevc - | dovi_tool extract-rpu --rpu-out input.rpu - | x265-10b - --input-depth 10 --output-depth 10 --y4m --preset veryfast --crf 22 --master-display "G(8500,39850)B(6550,2300)R(35400,14600)WP(15635,16450)L(40000000,50)" --max-cll "0,0" --colormatrix bt2020nc --colorprim bt2020 --transfer smpte2084 --dolby-vision-rpu input.rpu --dolby-vision-profile 8.1 --vbv-bufsize 20000 --vbv-maxrate 20000 output.hevc 


  


  I have also tried with dovi_tool like so

  


  ffmpeg -i nameofmovie.mp4 -f yuv4mpegpipe -strict -1 -pix_fmt yuv420p10le - | x265-10b - --input-depth 10 --output-depth 10 --y4m --preset veryfast --crf 22 --master-display "G(8500,39850)B(6550,2300)R(35400,14600)WP(15635,16450)L(40000000,50)" --max-cll "0,0" --colormatrix bt2020nc --colorprim bt2020 --transfer smpte2084 --dolby-vision-rpu input.rpu --dolby-vision-profile 8.1 --vbv-bufsize 20000 --vbv-maxrate 20000 output.hevc


  


  Which gives me this error :

  


  [hevc @ 000002f047aaf1c0] Skipping NAL unit 63
    Last message repeated 1 times
av_interleaved_write_frame(): Invalid argument
Error writing trailer of pipe:: Invalid argument00:00:00.04 bitrate=4772857.0kbits/s speed=0.297x
frame=    1 fps=0.0 q=-0.0 Lsize=   24300kB time=00:00:00.04 bitrate=4772857.0kbits/s speed=0.261x
video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 5271783.500000%
Error closing file pipe:: Invalid argument
[hevc @ 000002f047cc0b80] Skipping NAL unit 63
    Last message repeated 8 times
[hevc @ 000002f047a23dc0] Skipping NAL unit 63
    Last message repeated 1 times
[hevc @ 000002f0480be640] Skipping NAL unit 63
    Last message repeated 1 times
Conversion failed!


  


  Theoretically I'd like to go from mkv straight to HLS with dolby vision but that seems to be even more problematic.

  


  Any suggestions ?

  


• VLC recorded stream - No VIDEO MPEG2-TS

  19 décembre 2017, par Milan Freddy Múčka

  I have got problem playing my recorded stream in VLC. Audio is OK, but video seems corrupted.
  It was transmitted in MPEG2-TS format and recorded without encoding. When I’m trying to convert in different format, it keeps only audio.
  FFmpeg shows error

  Could not find codec parameters for stream 1 (Video : mpeg4 (mp4v / 0x7634706D), none, 6000 kb/s) : unspecified size
  Consider increasing the value for the ’analyzeduration’ and ’probesize’ options

  I tried more players, but none of them can decode it.

  Can I somehow edit video header, or specify codec to use in VLC/FFmpeg ?

  Video ID : 2

  Codec ID : 0

  Bit rate : 6 001 Kbps

  Width : 720 pixels

  Height : 576 pixels

  Display aspect ratio : 5:4

  Frame rate : 25.000 fps

  Standard : PAL

  Stream size : 504 MiB (96%)