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• avcodec/thread : Don't use ThreadFrame when unnecessary

  6 février 2022, par Andreas Rheinhardt

  avcodec/thread : Don't use ThreadFrame when unnecessary
  The majority of frame-threaded decoders (mainly the intra-only)
  
  need exactly one part of ThreadFrame : The AVFrame. They don't
  
  need the owners nor the progress, yet they had to use it because
  
  ff_thread_(get|release)_buffer() requires it.
  This commit changes this and makes these functions work with ordinary
  
  AVFrames ; the decoders that need the extra fields for progress
  
  use ff_thread_(get|release)_ext_buffer() which work exactly
  
  as ff_thread_(get|release)_buffer() used to do.
  This also avoids some unnecessary allocations of progress AVBuffers,
  
  namely for H.264 and HEVC film grain frames : These frames are not
  
  used for synchronization and therefore don't need a ThreadFrame.
  Also move the ThreadFrame structure as well as ff_thread_ref_frame()
  
  to threadframe.h, the header for frame-threaded decoders with
  
  inter-frame dependencies.
  Reviewed-by : Anton Khirnov <anton@khirnov.net>
  
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavcodec/aic.c
  • [DH] libavcodec/alac.c
  • [DH] libavcodec/av1dec.c
  • [DH] libavcodec/av1dec.h
  • [DH] libavcodec/bitpacked_dec.c
  • [DH] libavcodec/cfhd.c
  • [DH] libavcodec/cllc.c
  • [DH] libavcodec/cri.c
  • [DH] libavcodec/dnxhddec.c
  • [DH] libavcodec/dvdec.c
  • [DH] libavcodec/dxtory.c
  • [DH] libavcodec/dxv.c
  • [DH] libavcodec/dxva2_av1.c
  • [DH] libavcodec/error_resilience.h
  • [DH] libavcodec/exr.c
  • [DH] libavcodec/ffv1.h
  • [DH] libavcodec/ffv1dec.c
  • [DH] libavcodec/flacdec.c
  • [DH] libavcodec/fraps.c
  • [DH] libavcodec/h264_picture.c
  • [DH] libavcodec/h264_slice.c
  • [DH] libavcodec/h264dec.c
  • [DH] libavcodec/h264dec.h
  • [DH] libavcodec/hapdec.c
  • [DH] libavcodec/hevc_refs.c
  • [DH] libavcodec/hevcdec.c
  • [DH] libavcodec/hevcdec.h
  • [DH] libavcodec/hqx.c
  • [DH] libavcodec/huffyuvdec.c
  • [DH] libavcodec/jpeg2000dec.c
  • [DH] libavcodec/lagarith.c
  • [DH] libavcodec/lcldec.c
  • [DH] libavcodec/libopenjpegdec.c
  • [DH] libavcodec/magicyuv.c
  • [DH] libavcodec/mdec.c
  • [DH] libavcodec/mpegpicture.h
  • [DH] libavcodec/notchlc.c
  • [DH] libavcodec/nvdec_av1.c
  • [DH] libavcodec/photocd.c
  • [DH] libavcodec/pixlet.c
  • [DH] libavcodec/proresdec2.c
  • [DH] libavcodec/pthread_frame.c
  • [DH] libavcodec/rv34.c
  • [DH] libavcodec/sheervideo.c
  • [DH] libavcodec/takdec.c
  • [DH] libavcodec/thread.h
  • [DH] libavcodec/threadframe.h
  • [DH] libavcodec/tiff.c
  • [DH] libavcodec/tta.c
  • [DH] libavcodec/utils.c
  • [DH] libavcodec/utvideodec.c
  • [DH] libavcodec/v210dec.c
  • [DH] libavcodec/v410dec.c
  • [DH] libavcodec/vaapi_av1.c
  • [DH] libavcodec/vble.c
  • [DH] libavcodec/vp8.h
  • [DH] libavcodec/vp9shared.h
  • [DH] libavcodec/webp.c
  • [DH] libavcodec/ylc.c

• encoding with ffmpeg libx265 -pix_fmt gray gives unplayable vid

  9 juin 2017, par netjiro

  What am I missing ?
  I encode an old black and white film clip with ffmpeg libx265 passing -pix_fmt gray. The output is unplayable in both vlc and mplayer (linux), so I assume I’m missing something...

  encoding :

  ffmpeg -i clip.mkv \
  
      -c:v libx265 -preset slow -x265-params "crf=24" -pix_fmt gray \
  
      -c:a libopus -b:a 64k \
  
      -c:s copy \
  
      out.mkv

  vlc errors :

  [00007f8a3ddfe328] blend blend error: no matching alpha blending routine (chroma: RGBA -> GREY)
  
  [00007f8a3ddfe328] core blend error: blending RGBA to GREY failed
  
  ... repeated ...

  mplayer errors :

  Unexpected decoder output format Planar Y800
  
  ... repeated ...

  ffmpeg encoding output :

  ffmpeg version 3.2.4 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with gcc 4.9.4 (Gentoo 4.9.4 p1.0, pie-0.6.4)
  
    configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --docdir=/usr/share/doc/ffmpeg-3.2.4/html --mandir=/usr/share/man --enable-shared --cc=x86_64-pc-linux-gnu-gcc --cxx=x86_64-pc-linux-gnu-g++ --ar=x86_64-pc-linux-gnu-ar --optflags='-march=native -O2 -pipe' --disable-static --enable-avfilter --enable-avresample --disable-stripping --enable-nonfree --enable-version3 --disable-indev=oss --disable-indev=jack --disable-outdev=oss --enable-version3 --enable-bzlib --disable-runtime-cpudetect --disable-debug --disable-gcrypt --disable-gnutls --disable-gmp --enable-gpl --enable-hardcoded-tables --enable-iconv --enable-lzma --enable-network --enable-openssl --enable-postproc --disable-libsmbclient --enable-ffplay --enable-sdl2 --enable-vaapi --enable-vdpau --enable-xlib --enable-libxcb --enable-libxcb-shm --enable-libxcb-xfixes --enable-zlib --enable-libcdio --disable-libiec61883 --disable-libdc1394 --disable-libcaca --enable-openal --enable-opengl --enable-libv4l2 --disable-libpulse --enable-libopencore-amrwb --enable-libopencore-amrnb --disable-libfdk-aac --enable-libopenjpeg --enable-libbluray --enable-libcelt --disable-libgme --disable-libgsm --disable-mmal --enable-libmodplug --enable-libopus --disable-libilbc --disable-librtmp --enable-libssh --enable-libschroedinger --enable-libspeex --enable-libvorbis --enable-libvpx --disable-libzvbi --disable-libbs2b --disable-chromaprint --disable-libebur128 --disable-libflite --disable-frei0r --disable-libfribidi --enable-fontconfig --disable-ladspa --disable-libass --enable-libfreetype --disable-librubberband --disable-libzimg --enable-libsoxr --enable-pthreads --enable-libvo-amrwbenc --enable-libmp3lame --disable-libkvazaar --disable-nvenc --disable-libopenh264 --enable-libsnappy --enable-libtheora --enable-libtwolame --enable-libwavpack --disable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --disable-amd3dnow --disable-amd3dnowext --disable-fma4 --disable-xop --cpu=host --disable-doc --disable-htmlpages --enable-manpages
  
    libavutil      55. 34.101 / 55. 34.101
  
    libavcodec     57. 64.101 / 57. 64.101
  
    libavformat    57. 56.101 / 57. 56.101
  
    libavdevice    57.  1.100 / 57.  1.100
  
    libavfilter     6. 65.100 /  6. 65.100
  
    libavresample   3.  1.  0 /  3.  1.  0
  
    libswscale      4.  2.100 /  4.  2.100
  
    libswresample   2.  3.100 /  2.  3.100
  
    libpostproc    54.  1.100 / 54.  1.100
  
  x265 [info]: HEVC encoder version 2.2
  
  x265 [info]: build info [Linux][GCC 4.9.4][64 bit] 8bit+10bit+12bit
  
  x265 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX AVX2 FMA3 LZCNT BMI2
  
  x265 [info]: Unknown profile, Level-3.1 (Main tier)
  
  x265 [warning]: No thread pool allocated, --wpp disabled
  
  x265 [warning]: No thread pool allocated, --lookahead-slices disabled
  
  x265 [info]: Slices                              : 1
  
  x265 [info]: frame threads / pool features       : 3 / none
  
  x265 [info]: Coding QT: max CU size, min CU size : 64 / 8
  
  x265 [info]: Residual QT: max TU size, max depth : 32 / 1 inter / 1 intra
  
  x265 [info]: ME / range / subpel / merge         : star / 57 / 3 / 3
  
  x265 [info]: Keyframe min / max / scenecut / bias: 23 / 250 / 40 / 5.00
  
  x265 [info]: Lookahead / bframes / badapt        : 25 / 4 / 2
  
  x265 [info]: b-pyramid / weightp / weightb       : 1 / 1 / 0
  
  x265 [info]: References / ref-limit  cu / depth  : 4 / on / on
  
  x265 [info]: AQ: mode / str / qg-size / cu-tree  : 1 / 1.0 / 32 / 1
  
  x265 [info]: Rate Control / qCompress            : CRF-24.0 / 0.60
  
  x265 [info]: tools: rect limit-modes rd=4 psy-rd=2.00 rdoq=2 psy-rdoq=1.00
  
  x265 [info]: tools: rskip signhide tmvp strong-intra-smoothing deblock sao
  
  Output #0, matroska, to 'out.mkv':
  
    Metadata:
  
      encoder         : Lavf57.56.101
  
      Metadata:
  
      Stream #0:0(eng): Video: hevc (libx265), gray, 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 23.98 fps, 1k tbn, 23.98 tbc (default)
  
      Metadata:
  
        encoder         : Lavc57.64.101 libx265
  
      Stream #0:1(eng): Audio: opus (libopus) ([255][255][255][255] / 0xFFFFFFFF), 48000 Hz, stereo, flt, 64 kb/s (default)
  
      Metadata:
  
        encoder         : Lavc57.64.101 libopus
  
      Stream #0:2(eng): Subtitle: subrip (default)
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> hevc (libx265))
  
    Stream #0:1 -> #0:1 (eac3 (native) -> opus (libopus))
  
    Stream #0:3 -> #0:2 (copy)
  
  Press [q] to stop, [?] for help
  
  frame= 1439 fps=7.0 q=-0.0 Lsize=    5356kB time=00:01:00.01 bitrate= 731.1kbits/s speed=0.294x    
  
  video:4940kB audio:382kB subtitle:1kB other streams:0kB global headers:2kB muxing overhead: 0.629434%
  
  x265 [info]: frame I:      9, Avg QP:22.27  kb/s: 6064.82 
  
  x265 [info]: frame P:    340, Avg QP:23.62  kb/s: 1950.21 
  
  x265 [info]: frame B:   1090, Avg QP:29.65  kb/s: 230.75  
  
  x265 [info]: Weighted P-Frames: Y:0.9% UV:0.0%
  
  x265 [info]: consecutive B-frames: 2.9% 0.3% 1.4% 72.5% 22.9% 

• How to convert mkv to mp4 in ffmpeg losslessly

  16 novembre 2022, par crsswrdz

  I'm trying to losslessly convert an .mkv to .mp4.
(For use in Premiere Pro for film analysis and teaching).

  


  When I do so, I get a noticeable drop in file size (11gb to 2gb) and image quality.
The 5.1 streams are maintained but lose their mapping (everything seems displaced i.e. center channel now in the right channel) and the subtitles are lost.

  


  Is it possible to losslessly remux this .mkv to .mp4 ?
I don't want to re-encode it.

  


  E:\>ffmpeg -i Dune.mkv Dune.mp4
ffmpeg version 2022-11-03-git-5ccd4d3060-full_build-www.gyan.dev Copyright (c) 2000-2022 the FFmpeg developers
  built with gcc 12.1.0 (Rev2, Built by MSYS2 project)
  configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libaribb24 --enable-libdav1d --enable-libdavs2 --enable-libuavs3d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libaom --enable-libjxl --enable-libopenjpeg --enable-libvpx --enable-mediafoundation --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-liblensfun --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libvpl --enable-libshaderc --enable-vulkan --enable-libplacebo --enable-opencl --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint
  libavutil      57. 40.100 / 57. 40.100
  libavcodec     59. 51.101 / 59. 51.101
  libavformat    59. 34.101 / 59. 34.101
  libavdevice    59.  8.101 / 59.  8.101
  libavfilter     8. 49.101 /  8. 49.101
  libswscale      6.  8.112 /  6.  8.112
  libswresample   4.  9.100 /  4.  9.100
  libpostproc    56.  7.100 / 56.  7.100
Input #0, matroska,webm, from 'Dune.mkv':
  Metadata:
    title           : Dune
    encoder         : libebml v1.4.2 + libmatroska v1.6.4
    creation_time   : 2021-10-17T11:10:41.000000Z
  Duration: 02:28:56.16, start: 0.000000, bitrate: 10192 kb/s
  Stream #0:0(eng): Video: h264 (High), yuv420p(tv, bt709, progressive), 1920x776, SAR 1:1 DAR 240:97, 25 fps, 25 tbr, 1k tbn (default)
    Metadata:
      BPS             : 9806853
      DURATION        : 02:28:56.160000000
      NUMBER_OF_FRAMES: 223404
      NUMBER_OF_BYTES : 10954451639
      _STATISTICS_WRITING_APP: mkvmerge v62.0.0.1 ('Apollo') 64-bit
      _STATISTICS_WRITING_DATE_UTC: 2021-10-17 11:10:41
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
  Stream #0:1(eng): Audio: ac3, 48000 Hz, 5.1(side), fltp, 384 kb/s (default)
    Metadata:
      BPS             : 384000
      DURATION        : 02:28:56.128000000
      NUMBER_OF_FRAMES: 279254
      NUMBER_OF_BYTES : 428934144
      _STATISTICS_WRITING_APP: mkvmerge v62.0.0.1 ('Apollo') 64-bit
      _STATISTICS_WRITING_DATE_UTC: 2021-10-17 11:10:41
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
  Stream #0:2(eng): Subtitle: subrip (forced)
    Metadata:
      title           : FORCED
      BPS             : 1
      DURATION        : 01:49:04.860000000
      NUMBER_OF_FRAMES: 43
      NUMBER_OF_BYTES : 1104
      _STATISTICS_WRITING_APP: mkvmerge v62.0.0.1 ('Apollo') 64-bit
      _STATISTICS_WRITING_DATE_UTC: 2021-10-17 11:10:41
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
  Stream #0:3(eng): Subtitle: subrip (default)
    Metadata:
      BPS             : 34
      DURATION        : 02:20:49.064000000
      NUMBER_OF_FRAMES: 998
      NUMBER_OF_BYTES : 36676
      _STATISTICS_WRITING_APP: mkvmerge v62.0.0.1 ('Apollo') 64-bit
      _STATISTICS_WRITING_DATE_UTC: 2021-10-17 11:10:41
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  Stream #0:1 -> #0:1 (ac3 (native) -> aac (native))
Press [q] to stop, [?] for help
[aac @ 0000016e39c4a7c0] Using a PCE to encode channel layout "5.1(side)"
[libx264 @ 0000016e396ded40] using SAR=1/1
[libx264 @ 0000016e396ded40] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0000016e396ded40] profile High, level 4.0, 4:2:0, 8-bit
[libx264 @ 0000016e396ded40] 264 - core 164 r3101 b093bbe - H.264/MPEG-4 AVC codec - Copyleft 2003-2022 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=24 lookahead_threads=4 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'Dune.mp4':
  Metadata:
    title           : Dune
    encoder         : Lavf59.34.101
  Stream #0:0(eng): Video: h264 (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 1920x776 [SAR 1:1 DAR 240:97], q=2-31, 25 fps, 12800 tbn (default)
    Metadata:
      BPS             : 9806853
      DURATION        : 02:28:56.160000000
      NUMBER_OF_FRAMES: 223404
      NUMBER_OF_BYTES : 10954451639
      _STATISTICS_WRITING_APP: mkvmerge v62.0.0.1 ('Apollo') 64-bit
      _STATISTICS_WRITING_DATE_UTC: 2021-10-17 11:10:41
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
      encoder         : Lavc59.51.101 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
  Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1(side), fltp, 394 kb/s (default)
    Metadata:
      BPS             : 384000
      DURATION        : 02:28:56.128000000
      NUMBER_OF_FRAMES: 279254
      NUMBER_OF_BYTES : 428934144
      _STATISTICS_WRITING_APP: mkvmerge v62.0.0.1 ('Apollo') 64-bit
      _STATISTICS_WRITING_DATE_UTC: 2021-10-17 11:10:41
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
      encoder         : Lavc59.51.101 aac
frame=115222 fps=216 q=28.0 00000000000000000000000004009000size= 1180416kB time=01:16:52.41 bitrate=2096.5kbits/s speed=8.65x