Oh, it is mpeg1 layer 1 audio that seems to be broken, not layer 2 as i wrote earlier today. sorry.
ben On 21 Jan 2005 at 17:57, Ben Willers wrote: > Hey, > > there is just something i ran into yesterday. > 44.1 kHz and 32 kHz audio seems to be broken. if i switch the card to one of > those samplingfrequencies it changes the pitch and the speed of the audio. > even in passthrough mode. > oh, mpeg1 layer2 audio seems to be broken as well. > > apart from that, if you want to create dvds you better have 48kHz audio. > > thanks, > ben > > On 21 Jan 2005 at 8:42, kevin thayer wrote: > > > I'd like to put together some recommended values for > > optimum performance out of ivtv, in particular with > > respect to bitrate and resolution. > > > > There was someone (Cory?) who ran the card > > (specifically the saa7115) through some tests and > > determined that it really can't distinguish between > > 720 horizontal pixels and 360 (or 352 or w/e). I'm not > > sure if this took into account the mpeg compression or > > not. > > > > Anyhow, if 720x480 is way overkill, then all of us who > > record at that size are wasting our valuable hard > > drive space :) > > > > Also, it would be nice to have some knowledgable > > individuals run the mpeg codecs through some tests and > > see which ones seem to behave the best. It would > > probably be a good idea to include the firmware > > version you tested at in your results. > > > > With this in mind, here's the testing i'd like to do: > > > > 1) video decoder tests: optimum 'full-quality' > > resolution settings for saa7115, and also for the > > pvr150's decoder if possible. Ideally these would test > > raw video not encoded video to eliminate muddiness > > caused by the encoder. > > > > 2) codec tests: quality/bitrate, gop settings, etc. > > > > 3) advanced codec stuff: is it worth using any of the > > built-in filters? > > > > 4) audio: 44.1 kHz vs 48kHz etc. Do they work? is 44.1 > > decent sounding? (CD's are 44.1 kHz right? they sound > > pretty good to me :) > > > > it'd also be nice to collect all this info on the > > wiki. > > > > anyone interested (in testing)? is someone so > > interested that they want to run the project? I'll try > > and invest what time i can, but it'd be nice if > > someone with more time was interested > > > > thanks > > -tmk > > > > > > ------------------------------------------------------- > > This SF.Net email is sponsored by: IntelliVIEW -- Interactive Reporting > > Tool for open source databases. Create drag-&-drop reports. Save time > > by over 75%! Publish reports on the web. Export to DOC, XLS, RTF, etc. > > Download a FREE copy at http://www.intelliview.com/go/osdn_nl > > _______________________________________________ > > ivtv-devel mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/ivtv-devel > > > > > ------------------------------------------------------- > This SF.Net email is sponsored by: IntelliVIEW -- Interactive Reporting > Tool for open source databases. Create drag-&-drop reports. Save time > by over 75%! Publish reports on the web. Export to DOC, XLS, RTF, etc. > Download a FREE copy at http://www.intelliview.com/go/osdn_nl > _______________________________________________ > ivtv-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/ivtv-devel ------------------------------------------------------- This SF.Net email is sponsored by: IntelliVIEW -- Interactive Reporting Tool for open source databases. Create drag-&-drop reports. Save time by over 75%! Publish reports on the web. Export to DOC, XLS, RTF, etc. Download a FREE copy at http://www.intelliview.com/go/osdn_nl _______________________________________________ ivtv-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ivtv-devel
