[xine-bugs] [ xine-Bugs-1253642 ] xine-lib 1.0.2 and 1.1.0 won't play MJPG AVIs correctly

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Bugs item #1253642, was opened at 2005-08-07 17:39
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: G.K.MacGregor (gkmac)
Assigned to: Nobody/Anonymous (nobody)
Summary: xine-lib 1.0.2 and 1.1.0 won't play MJPG AVIs correctly

Initial Comment:
The latest 1.0.2 and 1.1.0 versions of xine-lib do 
not play AVIs from my digital camera correctly. 
Versions up to and including 1.0.1 (and of 
course mplayer) had no problems. 
 
My camera records videos as MJPG (Motion 
JPEG) AVI's in a choice of 15fps or 30fps 
(frames per second), xine-lib plays these 
improperly in different ways. 
 
15fps AVIs play jerkily, the video plays at half 
speed and regularly jerks forwards (like it's 
playing catchup) about twice a second. 
 
30fps AVIs play at the normal frame rate, but the 
first second plays the video at half speed for 
about half a second before playing normally. But 
since the sound still plays normally throughout, 
the audio and video end up badly out of sync; the 
audio being about half a second ahead of the 
video. 
 
It is only MJPG AVIs from my camera that suffer 
this, all other AVIs and other types of videos play 
fine. 
 
I've uploaded a couple of videos that 
demonstrate this, both are 7Mb each. 
 
http://www.gkmac.co.uk/stuff/descent-15fps.avi 
 
The camera pans gradually throughout this clip, 
panning fastest at the end which looks terrible 
due to the jerkiness. 
 
http://www.gkmac.co.uk/stuff/wallflip-30fps.avi 
 
The man running obviously shows the slowness 
of initial playback, and the crashmat landing 
demonstrates lack of a/v sync. 
 

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