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Date:      Mon, 22 Dec 1997 12:35:58 -0500
From:      Randall Hopper <rhh@ct.picker.com>
To:        Amancio Hasty <hasty@rah.star-gate.com>
Cc:        Luigi Rizzo <luigi@labinfo.iet.unipi.it>, multimedia@FreeBSD.ORG
Subject:   Re: MPEG audio/video sync & Re: These mtv video pauses are murder
Message-ID:  <19971222123558.54930@ct.picker.com>
In-Reply-To: <199712221731.JAA01187@rah.star-gate.com>; from Amancio Hasty on Mon, Dec 22, 1997 at 09:31:28AM -0800
References:  <19971222121942.13340@ct.picker.com> <199712221731.JAA01187@rah.star-gate.com>

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Amancio Hasty:
 |Do you also keep track of  skipped video frames? The driver 
 |may need a little work to faithfully report how many frames it
 |has skipped .

Indirectly.  That's what the timestamp is for.  If around 33 msec has past
since the last frame, 0 frames skipped.  If around 66 msec, 1 frame
skipped, etc.

Don't worry about adding this to the driver.  The number of frames it
skipped is really only part of the equation.  If the app has to block for a
bit writing frame data to disk, its going to skip more frames than were
actually captured.  So the captured skip rate isn't really that useful.

Thanks,

Randy





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