Theora file plays in high-speed bursts

[Graeme Hewson]

Playing an Ogg Theora file, the video plays very quickly for a while, then pauses. The sound plays normally, then when it's caught up to the video, another high-speed chunk of video plays for a while.

For instance, with any of the files on http://patentabsurdity.com/download.html, such as http://www.archive.org/download/Patent_Absurdity/Patent_Absurdity_VLQ_176kbit.ogv:

$ mplayer Patent_Absurdity_VLQ_176kbit.ogv
MPlayer 1.1-4.8 (C) 2000-2012 MPlayer Team
mplayer: could not connect to socket
mplayer: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.

Playing Patent_Absurdity_VLQ_176kbit.ogv.
libavformat version 54.20.3 (external)
libavformat file format detected.
[ogg @ 0x7fbd02210600]Multiple fisbone for the same stream is not implemented. Update your Libav version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
[ogg @ 0x7fbd02210600]29 bytes of comment header remain
[ogg @ 0x7fbd02210600]truncated comment header, 1 comments not found
[ogg @ 0x7fbd02210600]max_analyze_duration reached
[lavf] stream 1: video (theora), -vid 0
[lavf] stream 2: audio (vorbis), -aid 0
VIDEO: [theo] 400x224 0bpp -nan fps 0.0 kbps ( 0.0 kbyte/s)
Load subtitles in ./
Failed to open VDPAU backend libvdpau_r600.so: cannot open shared object file: No such file or directory
[vdpau] Error when calling vdp_device_create_x11: 1
[VO_XV] Could not grab port 63.
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
libavcodec version 54.35.0 (external)
Selected video codec: [fftheora] vfm: ffmpeg (FFmpeg Theora)
==========================================================================
==========================================================================
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
AUDIO: 48000 Hz, 1 ch, floatle, 32.0 kbit/2.08% (ratio: 4000->192000)
Selected audio codec: [ffvorbis] afm: ffmpeg (FFmpeg Vorbis)
==========================================================================
AO: [pulse] 48000Hz 1ch floatle (4 bytes per sample)
Starting playback...
Movie-Aspect is 1.79:1 - prescaling to correct movie aspect.
VO: [xv] 400x224 => 400x224 Planar YV12
A: 0.1 V: 0.0 A-V: 0.061 ct: -nan 0/ 0 ??% ??% ??,?% 0 0
[VD_FFMPEG] DRI failure.
A: 3.1 V: 174.2 A-V:-171.072 ct: -nan 0/ 0 ??% ??% ??,?% 0 0

Too many audio packets in the buffer: (4096 in 682944 bytes).
Maybe you are playing a non-interleaved stream/file or the codec failed?
For AVI files, try to force non-interleaved mode with the -ni option.
A: 21.8 V: 174.2 A-V:-152.387 ct: -nan 0/ 0 ??% ??% ??,?% 0 0

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The "Multiple fisbone" message seems to be irrelevant, because the same message is written by mplayer2, which plays Theora files fine.