[FFmpeg-trac] #70(FFmpeg:new): PPM decoding from pipe misreads frame sizes

[FFmpeg]

#70: PPM decoding from pipe misreads frame sizes
--------------------------+---------------------
  Reporter:  nixscripter  |      Owner:  michael
      Type:  defect       |     Status:  new
  Priority:  normal       |  Component:  FFmpeg
   Version:  git          |   Keywords:  ppm
Blocked By:               |   Blocking:
Reproduced:  0            |   Analyzed:  0
--------------------------+---------------------
 I am having trouble with piping PPM files to ffmpeg.

 If I pipe too many PPM files, I get an error about invalid image size,
 which is not correct. In fact, I have isolated a small sample of 20 files,
 which work once, and fail when repeated 7 times (for a total of 140
 frames).

 With other inputs, I get more serious problems (like a crash), but this
 problem may be the root cause of several others, and is the easiest to
 isolate.

 Command output:

 $ cat output02*ppm output02*ppm output02*ppm output02*ppm output02*ppm
 output02*ppm output02*ppm | ../../ffmpeg/ffmpeg -v 9 -loglevel 99 -y -f
 image2pipe -vcodec ppm -i - -sameq /tmp/output.m2v
 FFmpeg version git-N-29196-ge61b83d, Copyright (c) 2000-2011 the FFmpeg
 developers
   built on Apr 19 2011 12:19:46 with gcc 4.4.3
   configuration: --enable-gpl
   libavutil    50. 40. 1 / 50. 40. 1
   libavcodec   52.120. 0 / 52.120. 0
   libavformat  52.108. 0 / 52.108. 0
   libavdevice  52.  4. 0 / 52.  4. 0
   libavfilter   1. 79. 1 /  1. 79. 1
   libswscale    0. 13. 0 /  0. 13. 0
 [image2pipe @ 0x2bd4680] Probe buffer size limit 5000000 reached
 [image2pipe @ 0x2bd4680] Estimating duration from bitrate, this may be
 inaccurate
 Input #0, image2pipe, from 'pipe:':
   Duration: N/A, bitrate: N/A
     Stream #0.0, 87, 1/25: Video: ppm, rgb24, 160x120, 1/25, 25 fps, 25
 tbr, 25 tbn, 25 tbc
 Incompatible pixel format 'rgb24' for codec 'mpeg2video', auto-selecting
 format 'yuv420p'
 [buffer @ 0x2bdf390] w:160 h:120 pixfmt:rgb24
 [ffsink @ 0x30c7d70] auto-inserting filter 'auto-inserted scaler 0'
 between the filter 'src' and the filter 'out'
 [scale @ 0x30c8040] w:160 h:120 fmt:rgb24 -> w:160 h:120 fmt:yuv420p
 flags:0xa0000004
 Output #0, mpeg2video, to '/tmp/output.m2v':
   Metadata:
     encoder         : Lavf52.108.0
     Stream #0.0, 0, 1/90000: Video: mpeg2video, yuv420p, 160x120, 1/25,
 q=2-31, 200 kb/s, 90k tbn, 25 tbc
 Stream mapping:
   Stream #0.0 -> #0.0
 [ppm @ 0x2bdf4f0] [IMGUTILS @ 0x7fff8f08bde0] Picture size 160x0 is
 invalid
     Last message repeated 1 times
 frame=  140 fps=  0 q=0.0 Lsize=     422kB time=5.56 bitrate= 621.9kbits/s
 video:422kB audio:0kB global headers:0kB muxing overhead 0.000000%

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/70>
FFmpeg <http://ffmpeg.org>
FFmpeg issue tracker