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• ffmpeg convert from H.264 (High 4:4:4 Profile) to H.264 (Main Profile)

  22 juin 2016, par user3002233

  How can I convert a video from H.264 (High 4:4:4 Profile) to H.264 (Main Profile) using ffmpeg ?

  I can’t do that with this command : ffmpeg -i 1/25359.mp4 -profile:v main out.mp4.

  That’d return an error :

  ...
  
  That'd return an error:
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '1/25359.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf56.40.101
  
    Duration: 00:00:06.08, start: 0.000000, bitrate: 1059 kb/s
  
      Stream #0:0(und): Video: h264 (High 4:4:4 Predictive) (avc1 / 0x31637661), yuv444p, 351x297, 1057 kb/s, 12.50 fps, 12.50 tbr, 12800 tbn, 25 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
  No pixel format specified, yuv444p for H.264 encoding chosen.
  
  Use -pix_fmt yuv420p for compatibility with outdated media players.
  
  x264 [error]: main profile doesn't support 4:4:4
  
  [libx264 @ 0x8fa9640] Error setting profile main.
  
  [libx264 @ 0x8fa9640] Possible profiles: baseline main high high10 high422 high444
  
  Output #0, mp4, to '1/24545.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf56.40.101
  
      Stream #0:0(und): Video: h264, none, q=2-31, 128 kb/s, 12.50 fps (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
        encoder         : Lavc56.60.100 libx264
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  
  Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height

• high memory & cpu usage in ffmpeg C sample when muxing audio and video

  24 juin 2016, par chandu

  I am using the muxing.c example provided with ffmpeg 3.0 version to create an MP4 file (H.264 & AAC) with VS 2013.

  The sample is working fine with default width & height for video, but when I changed the width to 1920 and height to 1080, the sample is taking nearly 400MB & 60-70% cpu usage (using task manager & in Release mode) throughout the program. I have used multi threading also.

  I tried to free the encoded packet after calling write_frame(), but to no success.
  The memory is being released only after calling avcodec_close().

  Could anybody please tell me what I am doing wrong ?

  I am adding link (https://drive.google.com/open?id=0B75_-V7se7tmWUhyM0ItS0kzUVk) to code I tested with VS 2013.

  The screenshot link https://drive.google.com/open?id=0B75_-V7se7tmVm4tUjFtSnNNSHc

  The STREAM_DURATION value in the sample is set to 120 seconds (even tested with 600 seconds) and I changed default Height & Width values of AVCodecContext in add_stream function for video type to 1080 & 1920 respectively. Through out program, it is taking 355 MB, not changing at all. I think, once frame is encoded using avcodec_encode_video2 and written to the file, the memory should be released.

  Please correct me if I am wrong.

• Recording desktop with gdigrab ffmeg to mp4 file with too high video_size don't working

  4 juillet 2016, par tagry

  I try to recording my desktop with ffmpeg using the command :

  ffmpeg -f gdigrab -framerate 10 -video_size 1920x1200 -i desktop -pix_fmt yuv420p -vcodec libx264 -preset ultrafast output.mp4

  The problem is when the video_size option is higher than some size, (for example height higher 1089), the video can’t be read with Windows Media. I noticed that with this high size, the video which be recorded doesn’t have informations about size. I don’t understand why the record don’t work with a too big size. If somebody can help me.
  Thank you very much and very sorry for my English.

  [edit]

      ffmpeg version N-78758-g5156578 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-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --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. 19.100 / 55. 19.100
  
    libavcodec     57. 27.100 / 57. 27.100
  
    libavformat    57. 26.100 / 57. 26.100
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 37.100 /  6. 37.100
  
    libswscale      4.  0.100 /  4.  0.100
  
    libswresample   2.  0.101 /  2.  0.101
  
    libpostproc    54.  0.100 / 54.  0.100
  
  [gdigrab @ 00861860] Capturing whole desktop as 1920x1200x16 at (0,0)
  
  Input #0, gdigrab, from 'desktop':
  
    Duration: N/A, start: 1467631308.011542, bitrate: 368644 kb/s
  
      Stream #0:0: Video: bmp, rgb555le, 1920x1200, 368644 kb/s, 10 tbr, 1000k tbn, 10 tbc
  
  [libx264 @ 00863fe0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
  
  [libx264 @ 00863fe0] profile Constrained Baseline, level 5.0
  
  [libx264 @ 00863fe0] 264 - core 148 r2665 a01e339 - H.264/MPEG-4 AVC codec - Copyleft 2003-2016 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=10 scenecut=0 intra_refresh=0 rc=crf mbtree=0 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
  
  Output #0, mp4, to 'output.mp4':
  
    Metadata:
  
      encoder         : Lavf57.26.100
  
      Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 1920x1200, q=-1--1, 10 fps, 10240 tbn, 10 tbc
  
      Metadata:
  
        encoder         : Lavc57.27.100 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (bmp (native) -> h264 (libx264))
  
  Press [q] to stop, [?] for help
  
  frame=    6 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    
  
  frame=   11 fps= 11 q=10.0 size=     277kB time=00:00:00.40 bitrate=5664.4kbits/s speed=0.396x    
  
  frame=   16 fps= 11 q=9.0 size=     393kB time=00:00:00.90 bitrate=3578.8kbits/s speed=0.595x    
  
  frame=   21 fps= 10 q=9.0 size=     429kB time=00:00:01.40 bitrate=2507.4kbits/s speed=0.695x    
  
  frame=   26 fps= 10 q=9.0 size=     429kB time=00:00:01.90 bitrate=1849.3kbits/s speed=0.754x    
  
  frame=   31 fps= 10 q=18.0 size=     430kB time=00:00:02.40 bitrate=1466.1kbits/s speed=0.793x    
  
  frame=   36 fps= 10 q=10.0 size=     511kB time=00:00:02.90 bitrate=1442.6kbits/s speed=0.823x    
  
  frame=   41 fps= 10 q=10.0 size=     562kB time=00:00:03.40 bitrate=1353.0kbits/s speed=0.844x    
  
  frame=   46 fps= 10 q=10.0 size=     565kB time=00:00:03.90 bitrate=1185.9kbits/s speed=0.861x    
  
  frame=   51 fps= 10 q=9.0 size=     575kB time=00:00:04.40 bitrate=1070.8kbits/s speed=0.874x    
  
  frame=   56 fps= 10 q=12.0 size=     582kB time=00:00:04.90 bitrate= 972.3kbits/s speed=0.885x    
  
  frame=   61 fps= 10 q=10.0 size=     598kB time=00:00:05.40 bitrate= 907.7kbits/s speed=0.893x    
  
  frame=   66 fps= 10 q=10.0 size=     601kB time=00:00:05.90 bitrate= 834.5kbits/s speed=0.901x    
  
  frame=   71 fps= 10 q=10.0 size=     603kB time=00:00:06.40 bitrate= 772.3kbits/s speed=0.907x    
  
  frame=   76 fps= 10 q=12.0 size=     606kB time=00:00:06.90 bitrate= 719.8kbits/s speed=0.913x    
  
  frame=   81 fps= 10 q=10.0 size=     625kB time=00:00:07.40 bitrate= 691.8kbits/s speed=0.917x    
  
  frame=   86 fps= 10 q=10.0 size=     629kB time=00:00:07.90 bitrate= 652.2kbits/s speed=0.922x    
  
  frame=   91 fps= 10 q=12.0 size=     634kB time=00:00:08.40 bitrate= 618.2kbits/s speed=0.926x    
  
  frame=   97 fps= 10 q=10.0 size=     757kB time=00:00:09.00 bitrate= 689.3kbits/s speed=0.94x    
  
  frame=  100 fps= 10 q=-1.0 Lsize=     772kB time=00:00:10.00 bitrate= 632.8kbits/s speed=0.998x    
  
  video:771kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.153975%
  
  [libx264 @ 00863fe0] frame I:1     Avg QP:20.00  size:242961
  
  [libx264 @ 00863fe0] frame P:99    Avg QP:10.67  size:  5517
  
  [libx264 @ 00863fe0] mb I  I16..4: 100.0%  0.0%  0.0%
  
  [libx264 @ 00863fe0] mb P  I16..4:  0.8%  0.0%  0.0%  P16..4:  2.9%  0.0%  0.0%  0.0%  0.0%    skip:96.3%
  
  [libx264 @ 00863fe0] coded y,uvDC,uvAC intra: 23.6% 15.1% 13.9% inter: 1.2% 1.3% 0.8%
  
  [libx264 @ 00863fe0] i16 v,h,dc,p: 65% 33%  1%  1%
  
  [libx264 @ 00863fe0] i8c dc,h,v,p: 61% 25% 13%  0%
  
  [libx264 @ 00863fe0] kb/s:631.31