mp4 cut issue (ffmpeg -ss)

[leandro]

Hey everyone

I used ffmpeg -ss to cut some xvid files. Now when playing the cutted files in VLC, it plays the audio normally but the video takes up to 10 seconds to be displayed (a blank screen appears instead). Besides, windows won't display the video thumbnail for the file.

It may be related to frame/keyframe. Is there a way to fix that?

Thanks

[Selur]

remuxing with mp4box might help
(ffmpeg sometimes writes no pts values)

[leandro]

Thanks Selur.

Well, I tried mp4box with -saf option and it produced a file witch plays with distortion in VLC and doesn't play @ mplayer.

I must be doing something wrong. Maybe you could give me some directions.


Cheers!

[Selur]

Why the '-saf' option?

Have you tried a simple

mp4box -add old.mp4 new.mp4

call?

[hello_hello]

If you're not fussed about the whole MP4 thing, remux them as MKVs while using MKVMergeGUI's splitting function. I'm pretty sure it always splits on the first keyframe it finds after the specified split point. If you only want to split the file rather than divide it into pieces, you might need to specify "2" as the maximum number of output files.

[leandro]

Why the '-saf' option?

Have you tried a simple

mp4box -add old.mp4 new.mp4

call?

Worked! thanks man!

[leandro]

If you're not fussed about the whole MP4 thing, remux them as MKVs while using MKVMergeGUI's splitting function. I'm pretty sure it always splits on the first keyframe it finds after the specified split point. If you only want to split the file rather than divide it into pieces, you might need to specify "2" as the maximum number of output files.

Thanks man. Selur just hit it.