Yeah, I think someone on the mythtv-users list mentioned that when using the TVout of the 350, there's no (easy) way to alter the audio stream realtime, since it just dumps the mpg data to the card for decoding and audio processing.
I guess one way around it would be to "process" the mpeg prior to playing back at the faster speed, with corrected audio. In essence, a transcode type deal, and then play back the new transcoded copy which is at the faster rate/fixed audio. Can't really think of any other way to do it with hardware decoding, though, I don't know the ivtv driver very well... Maybe there's some way to affect the audio decoding pitch? As far as I know, the only way to currently use the timestretch with "normal" sounding audio, it to use a TVout video card. -Kenneth On Thu, 24 Mar 2005 21:25:48 -0500, Brent Kilgore <[EMAIL PROTECTED]> wrote: > Actually it's a new feature of .17. You can alter the playback speed > without altering the pitch of the audio .. so you can watch a movie at a > faster rate when your short on time or at a slower rate when you are > watching something in a foreign language you are trying to learn (or > whatever) > > But, with my pvr-350, the audio has pitch distortions consistent with > the faster/slower playback. I haven't had a chance to skim through > mythtv code but after further thought I expect this is a software based > audio stream alteration. Therefore if using the pvr-350's hardware > decompression, there is no chance to alter the audio stream since it is > still multiplexed in the mpeg stream. > > So, I guess to answer my own question, it has not been address and at > the moment I can't think how it can work with hardware decompression. > > But, I might be wrong, you're the expert. > > Thanks > Brent > > BTW thanks for a great driver. I can't remember if I ever said that. I > just wish I could contribute more in return. > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Chris > Kennedy > Sent: Thursday, March 24, 2005 5:19 PM > To: ivtv-devel@lists.sourceforge.net > Subject: Re: [ivtv-devel] timestretch function in mythtv .17 > > I don't have any doing a cat /dev/video0 > /dev/video16 here, and > haven't seen this bug myself in Myth before. > > Thanks, > Chris > > On Thu, Mar 24, 2005 at 05:13:36PM -0500, Brent Kilgore wrote: > > Has the audio distortion seen on pvr-350 (maybe other pvrs) been > > addressed? Or does this appear to be a mythtv bug? > > > > Thanks > > > > > > > > ------------------------------------------------------- > > SF email is sponsored by - The IT Product Guide > > Read honest & candid reviews on hundreds of IT Products from real > users. > > Discover which products truly live up to the hype. Start reading now. > > http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click > > _______________________________________________ > > ivtv-devel mailing list > > ivtv-devel@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/ivtv-devel > > -- > --- > Chris Kennedy / [EMAIL PROTECTED] > Engineer KMOS-TV/KTBG-FM > Broadcasting Services Department > Central Missouri State University > > ------------------------------------------------------- > SF email is sponsored by - The IT Product Guide > Read honest & candid reviews on hundreds of IT Products from real users. > Discover which products truly live up to the hype. Start reading now. > http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click > _______________________________________________ > ivtv-devel mailing list > ivtv-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/ivtv-devel > > ------------------------------------------------------- > SF email is sponsored by - The IT Product Guide > Read honest & candid reviews on hundreds of IT Products from real users. > Discover which products truly live up to the hype. Start reading now. > http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click > _______________________________________________ > ivtv-devel mailing list > ivtv-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/ivtv-devel > ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ ivtv-devel mailing list ivtv-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ivtv-devel
