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Re: [MPlayer-users] please help with video capture

To: "MPlayer usage questions, features, bugreports" <mplayer-users@xxxxxxxxxxxx>
Subject: Re: [MPlayer-users] please help with video capture
From: Jack <lt@xxxxxxxxxxxxx>
Date: Fri, 24 Sep 2004 20:45:19 -0700
Delivered-to: itdp@localhost
Delivered-to: mplayer-users@mplayerhq.hu
In-reply-to: <038d01c4a27d$04f89c30$0c46170a@LA.FRD.DIRECTV.COM>
References: <033801c4a26a$84772390$0c46170a@LA.FRD.DIRECTV.COM><20040924214508.192643a9@localhost.localdomain><037f01c4a279$f98a7600$0c46170a@LA.FRD.DIRECTV.COM> <Pine.A41.4.61.0409241409250.40238@dante65.u.washington.edu><038d01c4a27d$04f89c30$0c46170a@LA.FRD.DIRECTV.COM>
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6) Gecko/20040117
Sometimes, when just copying the stream from a capture card, the hard drive can't write fast enough to keep up with it. If you encounter this problem, you'll have to switch your capture card to mjpeg output (assuming it supports it) by adding "mjpeg" and "decimation=<1,2, 4>" to your -tv options. decimation=2 will give you 352x240.

Or, if you have enough processor, you could simply encode to a lossless codec (such as huffyuv) on the fly. (-ovc lavc -lavcopts vcodec=huffyuv:vstrict=-1)

-lt

Ricardo Kleemann wrote:

Wonderful, I'll give it a try

Thanks for the info, Loren!

Ricardo

----- Original Message ----- From: "Loren Merritt" <lorenm@xxxxxxxxxxxxxxxx>



AVI is a container. Whether it's lossy or not depends on the compression
format you use. But "-ovc copy" just copies the input video stream as-is,
so it is lossless, and you can encode from Capture.avi

--Loren Merritt




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