Opened 5 years ago

Closed 5 years ago

Last modified 5 years ago

#15 closed defect (fixed)

Initial I-frame in ogg/theora file is not decoded

Reported by: cehoyos Owned by: michael
Priority: normal Component: avformat
Version: git Keywords: ogg theora
Cc: Blocked By:
Blocking: Reproduced by developer: no
Analyzed by developer: no

Description

Attached sample plays fine with vlc and mplayer -demuxer ogg -vc theora, it shows initial artefacts with ffmpeg (and ffplay and mplayer -demuxer lavf -vc theora) that disappear after a few seconds.

ffmpeg -loglevel 99 -v 9 -i bad\ thumbnail\ from\ this\ video.ogv -an -qscale 2 out.avi
FFmpeg version git-N-28581-g4fa0e24, Copyright (c) 2000-2011 the FFmpeg developers
  built on Mar 23 2011 06:04:48 with gcc 4.5.2
  configuration: --cc=/usr/local/gcc-4.5.2/bin/gcc --enable-gpl
  libavutil    50. 40. 0 / 50. 40. 0
  libavcodec   52.114. 0 / 52.114. 0
  libavformat  52.103. 0 / 52.103. 0
  libavdevice  52.  3. 0 / 52.  3. 0
  libavfilter   1. 76. 0 /  1. 76. 0
  libswscale    0. 12. 0 /  0. 12. 0
[NULL @ 0x11ed650] Probed with size=2048 and score=100
[theora @ 0x11f2250] Theora bitstream version 30201
[ogg @ 0x11ed650] max_analyze_duration reached
Input #0, ogg, from 'bad thumbnail from this video.ogv':
  Duration: 00:00:19.06, start: 0.000000, bitrate: 417 kb/s
    Stream #0.0, 0, 1/1: Data: skeleton
    Stream #0.1, 152, 1/30: Video: theora, yuv420p, 480x270 [PAR 1:1 DAR 16:9], 1/30, 30 fps, 30 tbr, 30 tbn, 30 tbc
    Stream #0.2, 286, 1/44100: Audio: vorbis, 44100 Hz, mono, s16, 70 kb/s
    Metadata:
      ENCODER         : ffmpeg2theora-0.24
new_video_stream: video_codec_tag: 0
[buffer @ 0x13b94e0] w:480 h:270 pixfmt:yuv420p
[setdar @ 0x13b9990] a:16/9
[setdar @ 0x13b9990] w:480 h:270 -> dar:16/9 par:1/1
[theora @ 0x11f2250] Theora bitstream version 30201
Output #0, avi, to 'out.avi':
  Metadata:
    ISFT            : Lavf52.103.0
    Stream #0.0, 0, 1/30: Video: mpeg4, yuv420p, 480x270 [PAR 1:1 DAR 16:9], 1/30, q=2-31, 200 kb/s, 30 tbn, 30 tbc
Stream mapping:
  Stream #0.1 -> #0.0
Press ctrl-c to stop encoding
[theora @ 0x11f2250] vp3: first frame not a keyframe
frame=  560 fps=  0 q=2.0 Lsize=    2032kB time=19.07 bitrate= 873.1kbits/s
video:2013kB audio:0kB global headers:0kB muxing overhead 0.958895%

Attachments (1)

bad thumbnail from this video.ogv (970.6 KB) - added by cehoyos 5 years ago.

Download all attachments as: .zip

Change History (6)

Changed 5 years ago by cehoyos

comment:1 Changed 5 years ago by reimar

  • Status changed from new to open

comment:2 Changed 5 years ago by reimar

Hm, seems like I can't do anything useful with the status...

comment:3 Changed 5 years ago by michael

reimar, ive added you to the developer group, now you should be able to change status.

comment:4 Changed 5 years ago by cehoyos

  • Resolution set to fixed
  • Status changed from open to closed

Fixed by Reimar.

comment:5 Changed 5 years ago by cehoyos

  • Keywords ogg theora added
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