[FFmpeg-trac] #32(FFmpeg:new): too long time waste on the part before intended snippet and encode zero frame when encode a rmvb file to an avi snippet

[FFmpeg]

#32: too long time waste on the part before intended snippet and encode zero
frame when encode a rmvb file to an avi snippet
------------------------+---------------------
  Reporter:  littlebat  |      Owner:  michael
      Type:  defect     |     Status:  new
  Priority:  normal     |  Component:  FFmpeg
   Version:  git        |   Keywords:
Blocked By:             |   Blocking:
Reproduced:  1          |   Analyzed:  0
------------------------+---------------------
 I tried to get an avi snippet from a rmvb movie using ffmpeg, this is my
 command line: ffmpeg -i yyzs.rmvb -ss 02:40:00 -t 00:10:00 yyzs17.avi

 But, it spend about 10 minutes on the part before intended snippet and
 encode zero frame, the last 1 minutes it worked on that snippet. The key
 message is: "Buffering several frames is not supported. Please consume all
 available frames before adding a new one."

 I tried encoding rmvb to avi, rmvb to mp4, mp4 to mp4, mp4 to avi, got the
 same result.

 ffmpeg compiled from newest git repository: FFmpeg version
 git-N-28755-g7ac1674

 Envirnment: Vmware virtual machine(Core(TM)2 Duo CPU E7400), Ubuntu 10.04

 Console output:
 (break the long time running and omitted some
 repeat messages):

  mdx at u1004b2-desktop:/media/1217e/mdx/share/rwshare/yyzs$
 ffmpeg -i yyzs.rmvb -ss 02:40:00 -t 00:10:00 yyzs17.ffmpeg.refresh.avi
 FFmpeg version git-N-28755-g7ac1674, Copyright (c) 2000-2011 the FFmpeg
 developers built on Apr  1 2011 15:36:56 with gcc 4.4.3 configuration:
   libavutil    50. 40. 0 / 50. 40. 0
   libavcodec   52.116. 0 / 52.116. 0
   libavformat  52.104. 0 / 52.104. 0
   libavdevice  52.  4. 0 / 52.  4. 0
   libavfilter   1. 76. 0 /  1. 76. 0
   libswscale    0. 13. 0 /  0. 13. 0
 [NULL @ 0xa9f3010] Unsupported video codec
 [rm @ 0xa9ea600] max_analyze_duration reached
 Input #0, rm, from 'yyzs.rmvb':
   Metadata:
     title           :
     author          :
     copyright       :
     comment         :
   Duration: 02:45:12.13, start: 0.000000, bitrate: 608 kb/s
     Stream #0.0: Video: rv40, yuv420p, 640x360, 531 kb/s, 12.05 fps, 12
 tbr, 1k tbn, 12 tbc Stream #0.1: Audio: cook, 44100 Hz, stereo, s16, 64
 kb/s Stream #0.2: Data: [0][0][0][0] / 0x0000
 [buffer @ 0xaa76500] w:640 h:360 pixfmt:yuv420p
 Output #0, avi, to 'yyzs17.ffmpeg.refresh.avi':
   Metadata:
     INAM            :
     author          :
     ICOP            :
     ICMT            :
     ISFT            : Lavf52.104.0
     Stream #0.0: Video: mpeg4, yuv420p, 640x360, q=2-31, 200 kb/s, 12
 tbn, 12 tbc Stream #0.1: Audio: mp2, 44100 Hz, stereo, s16, 64 kb/s
 Stream mapping:
   Stream #0.0 -> #0.0
   Stream #0.1 -> #0.1
 Press [q] to stop encoding
 [buffer @ 0xaa76500] Buffering several frames is not supported. Please
 consume all available frames before adding a new one. frame=    0 fps=0
 q=0.0 size=      10kB time=10000000000.00 bitrate=   0.0kbit
 frame=    0 fps=  0 q=0.0 size=      10kB time=10000000000.00
 bitrate=   0.0kbit
 frame=    0 fps=  0 q=0.0 size=      10kB time=10000000000.00 bitrate=
 0.0kbit
 frame=    0 fps=  0 q=0.0 size=      10kB time=10000000000.00 bitrate=
 0.0kbit
 frame=    0 fps=  0 q=0.0 size=      10kB time=10000000000.00 bitrate=
 0.0kbit
  ...(omitted)
 frame=    0 fps=  0 q=0.0 size=      10kB time=10000000000.00 bitrate=
 0.0kbit
 Last message repeated 45778 times Buffering several frames is not
 supported. Please consume all available frames before adding a new one.
 [buffer @ 0xaa76500]
 Buffering several frames is not supported. Please consume all available
 frames before adding a new one.

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/32>
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