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
