[MPlayer-users] tv recording - newbie questions
rcooley at spamcop.net
Fri Mar 11 09:01:31 CET 2005
On Thu, 10 Mar 2005 19:16:24 +0100
Mauro Condarelli <mc5686 at mclink.it> wrote:
> 1) I would like to record audio directly from the snd-bt87x device; what
> should I do?
See the "btaudio" kernel module.
> 2) What are the best parameters to tecord TV? keep in mind that:
> - I do record rather noisy over-the-air analog TV.
> - I do not care too much for "the best compression" since i do not
> plan to store the shows, just to see them delayed.
A matter of opinion. If you have lots of noise, the hqdn3d filter might improve things for you. You might want to use mpeg2 at a higher bitrate, rather than mpeg4, if space isn't too important, and you prefer to use less CPU time.
> - I would like to record unattended and I have seen that other PVRs
> offer "commercial removal" how does that work?
Well, really, it doesn't... It's never been done right.
Commercial removal goes through the video, looking at all the solid-black frames, and scene-changes, and tries to decide if the section of video between black-frames is a block of commercials. It's very often wrong, so pretty much worthless. I find manually skiping commercials far faster and infinitely more accurate.
I'm willing to bet that you could make good commercial-delection, by setting mencoder to use infrequent keyframes, and find the commercials by identifying areas a few minutes long that have an unusually high number of keyframes. That's a tell-tale sign.
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