Audio mutes on long video streams

Etrac wrote on 10/5/2002, 6:19 AM

I edit long (2 hours) streams (I save the streams in MPEG2 format as I have a satellite board which saves only in MPEG2). When I import the streams in VideoFactory, the program starts building the peaks but at approx 50% it stops and the peaks are put at zero level. Although the audio still works in the software environment, when I render the stream I don't hear the audio starting from the point where the peaks are zero.

What do you think? Want's going on?

My system:
Pentium IV 512Mb RAM
ATI All-in-Wonder Radeon
Firts HD for the OS (Windows XP Pro)
Second HD only for video
(both HD 7200rpm)
VideoFactory 2.0c build 125

No program is working in background while rendering. I defragment the video HD always before rendering process starts.

Thank you.

Comments

Chienworks wrote on 10/5/2002, 7:23 AM

MPEG is a tricky format, and ATI's cards and capture software have been known to be rather buggy. Can you play the original MPEG file and hear the audio all the way through in MediaPlayer? If not, then i would assume it's the capture process that is messing up. If it does work, then maybe it's not creating a fully compliant MPEG file that VideoFactory can work with.

Side note: defragging before rendering is probably a big waste of time. Rendering isn't a time critical operation so it has no need of high speed disk access. It also doesn't matter how many programs you have running in the background during render, this will not effect the rendering process at all, other than making it take a little longer. The time it might be important to defrag and shut down other programs is before capturing or printing to tape.

Etrac wrote on 10/6/2002, 5:41 AM

Thank you for your answer. Yes, I can play the original movie and hear the audio with MediaPlayer. Sorry, I did not specified that I'm capturing video with a Technotrend satellite decoder. Due to the fact that satellite streams are sent in MPEG2 format the capture format can be only that one.
Thank you for your note on defragging. It's only little time I'm experimenting with video editing.