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• mov : Fix start_time for streams with empty edits in the middle

  22 février 2019, par Justin Ruggles

  mov : Fix start_time for streams with empty edits in the middle
  Empty edits can occur at any position within the edit list except for at
  
  the end. Empty edits in the middle should not impact the reported stream
  
  start_time or the video PTS adjustment, so only include empty edits at
  
  the start of the list in empty_edits_sum_duration.
  Signed-off-by : Vittorio Giovara <vittorio.giovara@gmail.com>
  

  • [DH] libavformat/mov.c

• ffmpeg nvdec not available when adding subtitles to mp4

  17 février 2019, par whatdoineed2do

  I have a mp4 video that I want to BURN-IN subtitles (from a .ass file and via -vf ass=/tmp/conf-notes.ass) with ffmpeg on a machine with a GTX1060 card however ffmpeg reports that it fails to create the NVDEC decoder.

  [h264 @ 0xcb9380] Error creating a NVDEC decoder: 1
  
  [h264 @ 0xcb9380] Failed setup for format cuda: hwaccel initialisation returned error.

  The output file is generated ok but during the creation the CPU is used heavily (I assume for decode) - if I drop the -vf ass=/tmp/conf-notes.ass and perform an mp4->mp4 reencode there are no problems.

  I want to know what I am missing from my command to allow the GPU to perform the decode when an .ass file is added to the chain.

  $ ffmpeg -hwaccel cuvid -i 2019-01-conferance.mp4 -vf ass=/tmp/conf-notes.ass -c:a copy -preset llhq -rc vbr_hq -vb 2M -minrate 500k -maxrate 12M -c:v h264_nvenc export.mp4
  
  ffmpeg version 4.0.2 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 8 (GCC)
  
    configuration: --arch=x86_64 --bindir=/usr/bin --datadir=/usr/share/ffmpeg --disable-debug --disable-static --disable-stripping --enable-alsa --enable-avfilter --enable-avresample --enable-bzlib --enable-decklink --enable-doc --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gpl --enable-iconv --enable-libass --enable-libbluray --enable-libcdio --enable-libdc1394 --enable-libdrm --enable-libfdk-aac --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libilbc --enable-libkvazaar --enable-libmfx --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librsvg --enable-librtmp --enable-librubberband --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtesseract --enable-libtheora --enable-libtwolame --enable-libv4l2 --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxcb --enable-libxcb-shm --enable-libxcb-xfixes --enable-libxcb-shape --enable-libxml2 --enable-libxvid --enable-libzvbi --enable-lv2 --enable-lzma --enable-libndi_newtek --enable-nonfree --enable-openal --enable-opencl --enable-opengl --enable-postproc --enable-pthreads --enable-sdl2 --enable-shared --enable-version3 --enable-xlib --enable-zlib --extra-cflags=-I/usr/include/cuda --incdir=/usr/include/ffmpeg --libdir=/usr/lib64 --mandir=/usr/share/man --optflags='-O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions -fstack-protector-strong -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection' --prefix=/usr --shlibdir=/usr/lib64 --enable-cuda --enable-cuvid --enable-libnpp --enable-nvdec --enable-nvenc --enable-runtime-cpudetect
  
    libavutil      56. 14.100 / 56. 14.100
  
    libavcodec     58. 18.100 / 58. 18.100
  
    libavformat    58. 12.100 / 58. 12.100
  
    libavdevice    58.  3.100 / 58.  3.100
  
    libavfilter     7. 16.100 /  7. 16.100
  
    libavresample   4.  0.  0 /  4.  0.  0
  
    libswscale      5.  1.100 /  5.  1.100
  
    libswresample   3.  1.100 /  3.  1.100
  
    libpostproc    55.  1.100 / 55.  1.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '2019-01-conferance.mp4':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: isommp42
  
      creation_time   : 2019-01-12T00:00:06.000000Z
  
    Duration: 00:00:24.07, start: 0.000000, bitrate: 11542 kb/s
  
      Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 11350 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 47.95 tbc (default)
  
      Metadata:
  
        creation_time   : 2019-01-12T00:00:07.000000Z
  
        handler_name    : Mainconcept MP4 Video Media Handler
  
        encoder         : AVC Coding
  
      Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 189 kb/s (default)
  
      Metadata:
  
        creation_time   : 2019-01-12T00:00:07.000000Z
  
        handler_name    : Mainconcept MP4 Sound Media Handler
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> h264 (h264_nvenc))
  
    Stream #0:1 -> #0:1 (copy)
  
  Press [q] to stop, [?] for help
  
  [h264 @ 0xcb9380] Error creating a NVDEC decoder: 1
  
  [h264 @ 0xcb9380] Failed setup for format cuda: hwaccel initialisation returned error.
  
  [Parsed_ass_0 @ 0x1241c00] Shaper: FriBidi 1.0.2 (SIMPLE) HarfBuzz-ng 1.7.5 (COMPLEX)
  
  [Parsed_ass_0 @ 0x1241c00] Using font provider fontconfig
  
  [Parsed_ass_0 @ 0x1241c00] Added subtitle file: '/tmp/conf-notes.ass' (2 styles, 101 events)

  The .ass file has been generated from a .srt file via ffmpeg -i foo.srt foo.ass

• ffmpeg_filter : initialize sub2video.end_pts together with last_pts

  20 février 2019, par Jan Ekström

  ffmpeg_filter : initialize sub2video.end_pts together with last_pts
  This way re-initializations properly update end_pts, enabling
  
  sub2video_heartbeat to call sub2video_update as expected to re-init
  
  the sub2video AVFrame's contents and to feed a frame into the filter
  
  chain.
  This then fixes memory usage ballooning due to framesync waiting
  
  for secondary input in case of no actual subtitle samples being present
  
  for a while in source after a re-init occurs.
  

  • [DH] fftools/ffmpeg_filter.c