Trimming bad frames off an AVI

[aklendathu]

I have an AVI file which contains a few bad frames and causes AVISynth to crash while re-encoding to MPEG-2.

Say, frames 9900 to 10005. How can I use TRIM in AVISynth to remove these frames off the file on-the-fly while processing ?

I've tried breaking up the file into two pieces but then I get a slight A/V sync problem after the bad frames.

TIA.

[jimmy basushi]

a=trim(0,9900)
b=trim(10005,endofmovie)
a+b

is that what your after? it should remove the the video frames, im not sure about how the audio goes tho

[aklendathu]

Yes, that's something like that, thanks. I had previously experimented with trim but never got the results I wanted.

In your script:
a=trim(0,9900)
b=trim(10005,endofmovie)
a+b

will the second trim still apply to the original AVI file ?
and will 'a+b' just concatenate the two trimmed clips ?

[stickboy]

Originally posted by aklendathu
will the second trim still apply to the original AVI file ?Yes.
and will 'a+b' just concatenate the two trimmed clips ?Yes.

(If you're not sure, you could try it.)

[aklendathu]

Yes, when in doubt, give it a try :D

I only asked to be sure, because I'm not reading this from home.

Thanks again.

[Soulhunter]

You could also try this (http://forum.doom9.org/showthread.php?s=&threadid=66372) to replace bad frames... ;)


Bye

[aklendathu]

That's a good idea but unfortunately I have about 220 bad frames (looks like the key frame is shot but the delta-frames are OK).

[esby]

If the frames are such bad they crash avs,
using soulHunter proposal might not be a solution,
since avs might crash when evaluating these...
trimming out might be the only solution left

esby

[aklendathu]

Well, I ended up having 5 different blocks of bad frames... but
the conversion is finally done.

Thanks all for your suggestions.