From owner-freebsd-multimedia Mon Dec 22 09:37:41 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id JAA09153 for multimedia-outgoing; Mon, 22 Dec 1997 09:37:41 -0800 (PST) (envelope-from owner-freebsd-multimedia) Received: from whqvax.picker.com (whqvax.picker.com [144.54.1.1]) by hub.freebsd.org (8.8.7/8.8.7) with SMTP id JAA09143 for ; Mon, 22 Dec 1997 09:37:35 -0800 (PST) (envelope-from rhh@ct.picker.com) Received: from ct.picker.com by whqvax.picker.com with SMTP; Mon, 22 Dec 1997 12:36:29 -0500 (EST) Received: from elmer.ct.picker.com by ct.picker.com (4.1/SMI-4.1) id AA20213; Mon, 22 Dec 97 12:36:28 EST Received: by elmer.ct.picker.com (SMI-8.6/SMI-SVR4) id MAA13341; Mon, 22 Dec 1997 12:35:59 -0500 Message-Id: <19971222123558.54930@ct.picker.com> Date: Mon, 22 Dec 1997 12:35:58 -0500 From: Randall Hopper To: Amancio Hasty Cc: Luigi Rizzo , multimedia@FreeBSD.ORG Subject: Re: MPEG audio/video sync & Re: These mtv video pauses are murder References: <19971222121942.13340@ct.picker.com> <199712221731.JAA01187@rah.star-gate.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.81 In-Reply-To: <199712221731.JAA01187@rah.star-gate.com>; from Amancio Hasty on Mon, Dec 22, 1997 at 09:31:28AM -0800 Sender: owner-freebsd-multimedia@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk 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