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• avcodec/avcodec.h : clarify decoupled decode/encode API docs

  15 mars 2017, par Marton Balint

  avcodec/avcodec.h : clarify decoupled decode/encode API docs
  Reviewed-by : wm4 <nfxjfg@googlemail.com>
  
  Signed-off-by : Marton Balint <cus@passwd.hu>
  

  • [DH] libavcodec/avcodec.h

• Ffmpeg generated movie (png -> mp4) has no video

  21 avril 2016, par ILiveForVR

  I have a whole bunch of png’s which I would like to convert into a mp4 video.
  I am using the following command to stich them together :
  ffmpeg -i _2016-04-20_14-51-00-500_%06d.png -pix_fmt yuv420p movie.mp4

  I am getting a file, which has a size so it isn’t empty. But when I play it in VLC or Quicktime it shows the time going by, but it has no video in it. Any idea what I’m doing wrong ?
  I also tried :

  ffmpeg -framerate 1/5 -i _2016-04-20_14-51-00-500_%06d.png -c:v libx264 -r 30 -pix_fmt yuv420p out.mp4

  and

  ffmpeg -r 45 -f image2 -s 1920x1080 -i _2016-04-20_14-51-00-500_%06d.png -vcodec libx264 -crf 25  -pix_fmt yuv420p test.mp4

  But still no video.
  This is the commandline output :

  >ffmpeg -i _2016-04-20_14-51-00-500_%06d.png -pix_fmt yuv420p movie.mp4
  
  ffmpeg version N-79546-g13406b6 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 5.3.0 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmfx --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zlib
  
    libavutil      55. 22.100 / 55. 22.100
  
    libavcodec     57. 35.100 / 57. 35.100
  
    libavformat    57. 34.102 / 57. 34.102
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 44.100 /  6. 44.100
  
    libswscale      4.  1.100 /  4.  1.100
  
    libswresample   2.  0.101 /  2.  0.101
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Input #0, image2, from '_2016-04-20_14-51-00-500_%06d.png':
  
    Duration: 00:00:02.60, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: png, rgba(pc), 8192x4096 [SAR 3779:3779 DAR 2:1], 25 tbr, 25 tbn
  
  [libx264 @ 00000000025851e0] using SAR=1/1
  
  [libx264 @ 00000000025851e0] frame MB size (512x256) > level limit (36864)
  
  [libx264 @ 00000000025851e0] DPB size (4 frames, 524288 mbs) > level limit (1 frames, 184320 mbs)
  
  [libx264 @ 00000000025851e0] MB rate (3276800) > level limit (2073600)
  
  [libx264 @ 00000000025851e0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
  
  [libx264 @ 00000000025851e0] profile High, level 5.2
  
  [libx264 @ 00000000025851e0] 264 - core 148 r2665 a01e339 - H.264/MPEG-4 AVC codec - Copyleft 2003-2016 - 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=18 lookahead_threads=3 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
  
  [mp4 @ 0000000002583fc0] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
  
  Output #0, mp4, to 'movie.mp4':
  
    Metadata:
  
      encoder         : Lavf57.34.102
  
      Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 8192x4096 [SAR 1:1 DAR 2:1], q=2-31, 25 fps, 12800 tbn
  
      Metadata:
  
        encoder         : Lavc57.35.100 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (png (native) -> h264 (libx264))
  
  Press [q] to stop, [?] for help
  
  frame=   65 fps=3.2 q=-1.0 Lsize=   13498kB time=00:00:02.48 bitrate=44585.2kbits/s speed=0.123x    6x
  
  video:13497kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.009971%
  
  [libx264 @ 00000000025851e0] frame I:1     Avg QP:16.71  size:1373751
  
  [libx264 @ 00000000025851e0] frame P:52    Avg QP:23.59  size:234822
  
  [libx264 @ 00000000025851e0] frame B:12    Avg QP:21.17  size: 19609
  
  [libx264 @ 00000000025851e0] consecutive B-frames: 73.8%  3.1%  4.6% 18.5%
  
  [libx264 @ 00000000025851e0] mb I  I16..4: 14.7% 73.8% 11.5%
  
  [libx264 @ 00000000025851e0] mb P  I16..4:  3.1%  5.9%  0.5%  P16..4: 23.2%  7.7%  2.0%  0.0%  0.0%    skip:57.5%
  
  [libx264 @ 00000000025851e0] mb B  I16..4:  0.1%  0.1%  0.0%  B16..8:  9.0%  0.2%  0.0%  direct: 0.2%  skip:90.3%  L0:33.0% L1:66.6% BI: 0.4%
  
  [libx264 @ 00000000025851e0] 8x8 transform intra:63.5% inter:78.5%
  
  [libx264 @ 00000000025851e0] coded y,uvDC,uvAC intra: 33.7% 3.1% 1.0% inter: 10.1% 0.4% 0.0%
  
  [libx264 @ 00000000025851e0] i16 v,h,dc,p: 24% 57%  3% 17%
  
  [libx264 @ 00000000025851e0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 14% 31% 38%  2%  3%  2%  5%  2%  4%
  
  [libx264 @ 00000000025851e0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 12% 63% 10%  2%  2%  1%  5%  1%  4%
  
  [libx264 @ 00000000025851e0] i8c dc,h,v,p: 94%  2%  3%  0%
  
  [libx264 @ 00000000025851e0] Weighted P-Frames: Y:0.0% UV:0.0%
  
  [libx264 @ 00000000025851e0] ref P L0: 71.6% 13.1% 10.8%  4.4%
  
  [libx264 @ 00000000025851e0] ref B L0: 69.0% 30.6%  0.4%
  
  [libx264 @ 00000000025851e0] ref B L1: 89.7% 10.3%
  
  [libx264 @ 00000000025851e0] kb/s:42522.38

• Encoding a readable movie by QuickTime using FFMPEG

  29 juillet 2018, par itamarb

  I’m trying to encode an image sequence using the following command :

  ffmpeg.exe -i %d.png -f mp4 -vcodec h264 test.mp4

  However, QuickTime failed to open this file or sometimes play a black movie, while this movie plays great in VLC player. Any suggestions how to make it play well in QuickTime ?

  Here is the output :

  ffmpeg.exe -i %d.png -f mp4 -vcodec libx264 13.mp4
  
  ffmpeg version N-49044-g89afa63 Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Jan 19 2013 20:36:06 with gcc 4.7.2 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
  
  isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
  
  le-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libg
  
  sm --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --e
  
  nable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --e
  
  nable-libspeex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --en
  
  able-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable
  
  -libxavs --enable-libxvid --enable-zlib --enable-filter=frei0r
  
    libavutil      52. 15.100 / 52. 15.100
  
    libavcodec     54. 89.100 / 54. 89.100
  
    libavformat    54. 61.101 / 54. 61.101
  
    libavdevice    54.  3.102 / 54.  3.102
  
    libavfilter     3. 32.101 /  3. 32.101
  
    libswscale      2.  2.100 /  2.  2.100
  
    libswresample   0. 17.102 /  0. 17.102
  
    libpostproc    52.  2.100 / 52.  2.100
  
  [image2 @ 0221b940] max_analyze_duration 5000000 reached at 5000000 microseconds
  
  
  
  Input #0, image2, from '%d.png':
  
    Duration: 00:01:19.36, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: png, rgb24, 639x480, 25 fps, 25 tbr, 25 tbn, 25 tbc
  
  [libx264 @ 0221edc0] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE
  
  4.2 AVX
  
  [libx264 @ 0221edc0] profile High 4:4:4 Predictive, level 3.0, 4:4:4 8-bit
  
  [libx264 @ 0221edc0] 264 - core 129 r2230 1cffe9f - H.264/MPEG-4 AVC codec - Cop
  
  yleft 2003-2012 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deb
  
  lock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 m
  
  e_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chro
  
  ma_qp_offset=4 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 in
  
  terlaced=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 scenecu
  
  t=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 '13.mp4':
  
    Metadata:
  
      encoder         : Lavf54.61.101
  
      Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv444p, 639x480, q=-1--1
  
  , 12800 tbn, 25 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (png -> libx264)
  
  Press [q] to stop, [?] for help
  
  frame=   76 fps=0.0 q=28.0 size=       3kB time=00:00:00.96 bitrate=  22.3kbits/
  
  frame=  156 fps=155 q=28.0 size=       7kB time=00:00:04.16 bitrate=  14.7kbits/
  
  frame=  219 fps=145 q=28.0 size=      12kB time=00:00:06.68 bitrate=  14.1kbits/
  
  frame=  283 fps=141 q=28.0 size=      16kB time=00:00:09.24 bitrate=  14.2kbits/
  
  frame=  352 fps=140 q=28.0 size=      25kB time=00:00:12.00 bitrate=  17.4kbits/