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AV sync?

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Dmitry Vergeles:
Hello Nologic,

Some notes.

>>1. This AVI file is broken. Seeking will not work correctly. Do you want to try to fix it? This might take a long time.

That is absolutely problem of VLC, as AVI files are created by Microsoft Muxer and AVI is Microsoft standard. WMP does not complain to such streams, only VLC does.
If you reject so-called fixing offer, VLC will play it back with no probs.

>>AVI: Stream 0 (video) has a non-zero start position of 30 samples (+1000 ms). VirtualDub does not currently support a non-zero start time and the stream will be interpreted as starting from zero.

Nonzero position at VIDEO is not a bug, but an attempt to keep video audio/synchronization. I don't know why Vdub does not like such streams, but that is absolutely valid situation.

As for out of sync, it would be helpfully to have a look at the stream you grab.

Nologic:
I can also confirm this issue. So far experienced it with both TSCC & FFV1 lossless encodes.

The original resulting file from HyperCam will play fine in VLC but will be out of sync in WMP.

VirtualDub gives me the following errors upon opening the file.

AVI: Stream 0 (video) has a non-zero start position of 30 samples (+1000 ms). VirtualDub does not currently support a non-zero start time and the stream will be interpreted as starting from zero.

AVI: Stream 1 (audio) has a non-zero start position of 1469 samples (+33 ms). VirtualDub does not currently support a non-zero start time and the stream will be interpreted as starting from zero.

VLC however does give the following error when opening the file.

This AVI file is broken. Seeking will not work correctly. Do you want to try to fix it? This might take a long time.

=========================================
== Update
=========================================

I'm going to have to retract my confirmation at this time, as I'm currently experiencing to a much lesser degree this same issue with other products.

cantoris:
Hi,

That test video I uploaded for you is meant to be uncompressed (as that was how I told HyperCam to create it).
If I load it into GSpot, it says the video codec is "DIB (_RGB)" - a raw RGB Device Independent Bitmap.
The original material I recorded was also done "uncompressed".

Thanks.

Dmitry Vergeles:
Hello Cantorism,

Sorry for delayed answer.
Could you please ttry to record the same movie with video uncomressed just to check if there is any difference?

cantoris:
OK here's one:
http://www.megaupload.com/?d=1WIMC82K
5MB zipped.  Also uncompressed video straight off HyperCam.
It gives the same error in VirtualDub and plays out of sync if I load it into WMP as is.

Thanks for looking into this for me.

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