Disk Activity Causes Video Stuttering

Simon Morgan simon at 16hz.net
Sun Jun 25 14:10:02 UTC 2006

On Sun, Jun 25, 2006 at 12:00:28PM +0100, Simon Morgan wrote:
> I'm having trouble with mplayer that seems to be highlighting a bug or general
> inefficiency in the ata driver when used with the VIA VT8235 chipset used in
> the ASUS A7V8X motherboard.
> The problem is that whenever a video is being played and there is any
> reasonable amount of disk activity (e.g dd if=/dev/urandom of=test), the video
> skips and the mplayer status shows that it's had to drop frames to keep the
> video and audio in sync.

I've made some discoveries that discredit my previous assertion that the ata
driver is to blame. I created a memory disk using mdconfig and copied a video to
it and still got dropped frames when when performing the above command.

I had somebody who owns a different motherboard but which uses the same IDE
chipset to perform the same steps and he didn't experience any dropped frames.

Never let your schooling interfere with your education.

More information about the freebsd-questions mailing list