Recherche avancée

Sur d’autres sites (5884)

• mpegts : save last pcr of pcr pids in PES Context

  27 juillet 2013, par Marton Balint

  mpegts : save last pcr of pcr pids in PES Context
  Based on a patch by Reimar Döffinger.
  
  http://lists.ffmpeg.org/pipermail/ffmpeg-devel/2012-September/131610.html
  Signed-off-by : Marton Balint <cus@passwd.hu>
  
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libavformat/mpegts.c

• Frame rate very high for a muxer not efficiently supporting it

  23 avril 2014, par DevDave

  I got an error when trying to run the following command with FFMpeg :

  -i "file1.mp4" -s 506x406 -b:v 2000k -ar 22050 "file2.mp4"

  FFMpeg was stuck converting this video, which was just a 7Mb .mp4 file, for hours and eventually I had to kill the process.

  The output error from FFMpeg is as follows :

  Converter Error Message: 
  
  ffmpeg version N-42069-g3233ad4 Copyright (c) 2000-2012 the FFmpeg developers
  
    built on Jun 30 2012 13:18:20 with gcc 4.7.1
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-runtime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libass --enable-libcelt --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libnut --enable-libopenjpeg --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
  
    libavutil      51. 63.100 / 51. 63.100
  
    libavcodec     54. 31.100 / 54. 31.100
  
    libavformat    54. 14.100 / 54. 14.100
  
    libavdevice    54.  0.100 / 54.  0.100
  
    libavfilter     3.  0.100 /  3.  0.100
  
    libswscale      2.  1.100 /  2.  1.100
  
    libswresample   0. 15.100 /  0. 15.100
  
    libpostproc    52.  0.100 / 52.  0.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'File1.mp4':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 1
  
      compatible_brands: mp42mp41
  
      creation_time   : 2013-07-18 15:38:11
  
    Duration: 00:02:02.23, start: -7.105889, bitrate: 518 kb/s
  
      Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 718x574 [SAR 64:45 DAR 22976:12915], 361 kb/s, 24.97 fps, 90k tbr, 90k tbn, 180k tbc
  
      Metadata:
  
        creation_time   : 2013-07-18 15:38:11
  
        handler_name    : Apple Video Media Handler
  
      Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, s16, 129 kb/s
  
      Metadata:
  
        creation_time   : 2013-07-18 15:38:11
  
        handler_name    : Apple Sound Media Handler
  
  [graph 0 input from stream 0:0 @ 0259cee0] w:718 h:574 pixfmt:yuv420p tb:1/90000 fr:90000/1 sar:64/45 sws_param:flags=2
  
  [output stream 0:0 @ 0259cda0] No opaque field provided
  
  [scaler for output stream 0:0 @ 0259c0e0] w:718 h:574 fmt:yuv420p sar:64/45 -> w:506 h:406 fmt:yuv420p sar:666304/466785 flags:0x4
  
  **[mp4 @ 02599020] Frame rate very high for a muxer not efficiently supporting it.
  
  Please consider specifying a lower framerate, a different muxer or -vsync 2**
  
  [graph 1 input from stream 0:1 @ 02b88200] tb:1/48000 samplefmt:s16 samplerate:48000 chlayout:0x3
  
  [auto-inserted resampler 0 @ 024e44e0] chl:stereo fmt:s16 r:48000Hz -> chl:stereo fmt:s16 r:22050Hz
  
  [libx264 @ 02407200] using SAR=895/627
  
  [libx264 @ 02407200] MB rate (74880000) > level limit (2073600)
  
  [libx264 @ 02407200] using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64
  
  [libx264 @ 02407200] profile High, level 5.2
  
  [libx264 @ 02407200] 264 - core 125 r2200 999b753 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - 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=3 lookahead_threads=1 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=abr mbtree=1 bitrate=2000 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Output #0, mp4, to 'File2.mp4':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 1
  
      compatible_brands: mp42mp41
  
      encoder         : Lavf54.14.100
  
      Stream #0:0(und): Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 506x406 [SAR 666304:466785 DAR 22976:12915], q=-1--1, 2000 kb/s, 180k tbn, 90k tbc
  
      Metadata:
  
        creation_time   : 2013-07-18 15:38:11
  
        handler_name    : Apple Video Media Handler
  
      Stream #0:1(und): Audio: aac ([64][0][0][0] / 0x0040), 22050 Hz, stereo, s16, 128 kb/s
  
      Metadata:
  
        creation_time   : 2013-07-18 15:38:11
  
        handler_name    : Apple Sound Media Handler
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 -> libx264)
  
    Stream #0:1 -> #0:1 (aac -> libvo_aacenc)
  
  Press [q] to stop, [?] for help
  
  DTS -3600, next:-79995 st:0 invalid dropping
  
  frame= 7201 fps=768 q=69.0 size=       0kB time=00:00:00.00 bitrate=   0.0kbits/s dup=7198 drop=0    
  
  frame=10801 fps=575 q=69.0 size=       0kB time=00:00:00.00 bitrate=   0.0kbits/s dup=10797 drop=0    
  
  frame=14401 fps=516 q=69.0 size=       0kB time=00:00:00.00 bitrate=   0.0kbits/s dup=14396 drop=0    
  
  frame=18001 fps=484 q=69.0 size=       0kB time=00:00:00.00 bitrate=   0.0kbits/s dup=17995 drop=0    
  
  frame=21601 fps=464 q=69.0 size=       0kB time=00:00:00.00 bitrate=   0.0kbits/s dup=21594 drop=0    
  
  frame=25201 fps=454 q=69.0 size=       0kB time=00:00:00.00 bitrate=   0.0kbits/s dup=25193 drop=0    
  
  .....

  And it just pretty much carries on like that until when I killed the process.

  Can anyone explain to me what is going on here and what I can do to fix this ?

• mpegts : add fix_teletext_pts mpegts demuxer option

  4 août 2013, par Marton Balint

  mpegts : add fix_teletext_pts mpegts demuxer option
  Changes since v1 of the patch :
  
   enable option by default
  
   add documentation
  
   move up PTS override code after PES header parsing, to ensure we use the
  
    last PCR before the first packet of the teletext PES packet.
  The option overrides teletext packet PTS and DTS values with the timestamps
  
  calculated from the PCR of the first program which the teletext stream is part
  
  of and is not discarded.
  Using the same teletext PID for multiple programs is possible, therefore we
  
  need some kind of heuristics to know which program PCR we should synchronize
  
  to. Using the first non-discarded PCR pid among the programs of the teletext
  
  stream seemed like a good choice.
  The patch does not do PCR interpolation to estimate the PCR of the teltetext
  
  packet, it just uses the last PCR of the program, which may cause a slight
  
  error (0.1 sec) in the teletext packet pts-es.
  Based on a patch by Reimar Döffinger.
  
  http://lists.ffmpeg.org/pipermail/ffmpeg-devel/2012-September/131610.html
  Signed-off-by : Marton Balint <cus@passwd.hu>
  
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] doc/demuxers.texi
  • [DH] libavformat/mpegts.c
  • [DH] libavformat/version.h