Greetings Dan!
I have received many reports of sluggish playback using OpenShot with MLT
0.7.0 and 0.7.2 (including the GIT trunk). I have tried to do a bit of
research before reporting this bug, but it's a bit difficult to nail down.
It seems that when you take an HD video clip (I have seen various formats
and codecs reported), and place it more than 1 time on the timeline, MLT
starts to skip and stutter in an unusable way. However, if the clip is only
on the timeline 1 time, it plays back smoothly. I'm not sure if these steps
will reproduce the problem for you, but in general, add one of these clips
to your OpenShot timeline a few different times (back to back), and seek to
an arbitrary point and hit Play. Then repeat. After 1 or 2 seeks and
Plays, it should start to stutter.
Also, the few people I've spoken to say the stuttering is vastly reduced
when downgrading to MLT 0.6.2. So, the real problem is an increase in the
amount of stuttering in the 0.7+ series, rather than perfectly smooth
playback, if that makes sense.
Here are some sample files that reproduce the problem for me:
http://Lam.pl/openshot-mlt-test.tar (test.avi)
http://bandshed.net/files/MVI_2503.MOV
So, sorry for the vague error, but hopefully you might have some thoughts on
the matter. =)
Thanks in advance!
-Jonathan
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