[FFmpeg-trac] #199(FFmpeg:new): failed decoding h264 if -threads specifid

FFmpeg trac at avcodec.org
Fri May 13 14:16:45 CEST 2011


#199: failed decoding h264 if -threads specifid
--------------------------+---------------------
  Reporter:  verem        |      Owner:  michael
      Type:  defect       |     Status:  new
  Priority:  critical     |  Component:  FFmpeg
   Version:  unspecified  |   Keywords:
Blocked By:               |   Blocking:
Reproduced:  0            |   Analyzed:  0
--------------------------+---------------------
 todays latest git-N-29906-ge3114a9 ffmpeg build failed to decode h264
 stream if -thread parameter specified:

 with threads parameter specified:

 {{{
 [root at dev-4 ffmpeg.git]# ./ffmpeg -threads 2 -i
 nature_704x576_25Hz_1500kbits.h264 -f rawvideo -y /dev/null
 ffmpeg version git-N-29906-ge3114a9, Copyright (c) 2000-2011 the FFmpeg
 developers
   built on May 13 2011 10:54:40 with gcc 4.5.1 20100924 (Red Hat 4.5.1-4)
   configuration: --prefix=/usr/local/enctools --extra-
 cflags=-I/usr/local/enctools/include --extra-
 ldflags=-L/usr/local/enctools/lib --enable-shared --enable-gpl --enable-
 version3 --enable-nonfree --enable-postproc --enable-avfilter --enable-
 pthreads --enable-bzlib --enable-zlib --enable-libopencore-amrnb --enable-
 libopencore-amrwb --enable-libfaac --enable-libmp3lame --enable-libspeex
 --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid
   libavutil    51.  2. 1 / 51.  2. 1
   libavcodec   53.  5. 0 / 53.  5. 0
   libavformat  53.  0. 3 / 53.  0. 3
   libavdevice  53.  0. 0 / 53.  0. 0
   libavfilter   2.  5. 0 /  2.  5. 0
   libswscale    0. 14. 0 /  0. 14. 0
   libpostproc  51.  2. 0 / 51.  2. 0
 [h264 @ 0x91b8b20] max_analyze_duration reached
 [h264 @ 0x91b8b20] Estimating duration from bitrate, this may be
 inaccurate

 Seems stream 0 codec frame rate differs from container frame rate: 50.00
 (50/1) -> 25.00 (50/2)
 Input #0, h264, from 'nature_704x576_25Hz_1500kbits.h264':
   Duration: N/A, bitrate: N/A
     Stream #0.0: Video: h264 (Main), yuv420p, 704x576, 25 fps, 25 tbr,
 1200k tbn, 50 tbc
 [buffer @ 0x9303240] w:704 h:576 pixfmt:yuv420p tb:1/1000000 sar:0/1
 Output #0, rawvideo, to '/dev/null':
   Metadata:
     encoder         : Lavf53.0.3
     Stream #0.0: Video: rawvideo, yuv420p, 704x576, q=2-31, 200 kb/s, 90k
 tbn, 25 tbc
 Stream mapping:
   Stream #0.0 -> #0.0
 Press [q] to stop encoding
 [buffer @ 0x9303240] Buffer video input changed from size:704x576
 fmt:yuv420p to size:0x0 fmt:(null)
 [buffer @ 0x9303240] Inserting scaler filter
 [ffsink @ 0x9462c00] auto-inserting filter 'Input equalizer' between the
 filter 'src' and the filter 'out'
 [scale @ 0x91ba8e0] w:0 h:0 fmt:(null) -> w:704 h:576 fmt:yuv420p
 flags:0x2
 swScaler: Unknown format is not supported as input pixel format
     Last message repeated 2 times
 [IMGUTILS @ 0xbf9a4154] Picture size 0x0 is invalid
 Segmentation fault
 }}}

 without threads parameter:

 {{{
 [root at dev-4 ffmpeg.git]# ./ffmpeg -i nature_704x576_25Hz_1500kbits.h264 -f
 rawvideo -y /dev/null
 ffmpeg version git-N-29906-ge3114a9, Copyright (c) 2000-2011 the FFmpeg
 developers
   built on May 13 2011 10:54:40 with gcc 4.5.1 20100924 (Red Hat 4.5.1-4)
   configuration: --prefix=/usr/local/enctools --extra-
 cflags=-I/usr/local/enctools/include --extra-
 ldflags=-L/usr/local/enctools/lib --enable-shared --enable-gpl --enable-
 version3 --enable-nonfree --enable-postproc --enable-avfilter --enable-
 pthreads --enable-bzlib --enable-zlib --enable-libopencore-amrnb --enable-
 libopencore-amrwb --enable-libfaac --enable-libmp3lame --enable-libspeex
 --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid
   libavutil    51.  2. 1 / 51.  2. 1
   libavcodec   53.  5. 0 / 53.  5. 0
   libavformat  53.  0. 3 / 53.  0. 3
   libavdevice  53.  0. 0 / 53.  0. 0
   libavfilter   2.  5. 0 /  2.  5. 0
   libswscale    0. 14. 0 /  0. 14. 0
   libpostproc  51.  2. 0 / 51.  2. 0
 [h264 @ 0x8e67b20] max_analyze_duration reached
 [h264 @ 0x8e67b20] Estimating duration from bitrate, this may be
 inaccurate

 Seems stream 0 codec frame rate differs from container frame rate: 50.00
 (50/1) -> 25.00 (50/2)
 Input #0, h264, from 'nature_704x576_25Hz_1500kbits.h264':
   Duration: N/A, bitrate: N/A
     Stream #0.0: Video: h264 (Main), yuv420p, 704x576, 25 fps, 25 tbr,
 1200k tbn, 50 tbc
 [buffer @ 0x8fb2240] w:704 h:576 pixfmt:yuv420p tb:1/1000000 sar:0/1
 Output #0, rawvideo, to '/dev/null':
   Metadata:
     encoder         : Lavf53.0.3
     Stream #0.0: Video: rawvideo, yuv420p, 704x576, q=2-31, 200 kb/s, 90k
 tbn, 25 tbc
 Stream mapping:
   Stream #0.0 -> #0.0
 Press [q] to stop encoding
 frame=  236 fps=217 q=0.0 Lsize=       0kB time=9.44 bitrate=   0.0kbits/s
 video:140184kB audio:0kB global headers:0kB muxing overhead -100.000000%
 Received signal 2: terminating.
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/199>
FFmpeg <http://ffmpeg.org>
FFmpeg issue tracker


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