On 12/02/2009 12:33 PM, Paul Davis wrote: > On Tue, Dec 1, 2009 at 8:02 PM, Danni Coy<danni.coy@xxxxxxxxx> wrote: > >> You would be suprised. RGBA32 is used quite commonly in the compositor >> world, usually stored as a sequence of images, with even higher precisions >> available. Raw RGB24 is reasonably common with the video professionals I >> know, when I questioned them about it they said that they could acheive more >> film like colour grading than they could in any of the YUV colour spaces. >> >> It's probably not the best format for realtime work given the amount of data >> that needs to be transmitted (or maybe it is), I have previously worked with >> piping raw YUV (yuv4linux) between applications and having something like >> jack to manage the connections would be a godsend. >> > my understanding is that one of the many problems that video faces is > that there truly is no equivalent to "32 bit floating point for > audio". whereas this format for audio samples is pretty much > acceptable for just about all purposes, and the ones not satisfied by > it are corner cases, in video there are many common cases that prefer > quite different data representations. for an audio analogy, imagine a > JACK world where some clients wanted FFT-bin data while others wanted > floating point encoding of PCM. > > until or unless someone can step up and authoritatively say "the > interchange format for video is XXXXXX", its hard to imagine a "jack > for video" system really working very usefully for a significant > number of people. those who work entirely in the RGBA32 or YUV spaces > would be happy with just that format; anyone mixing processing that is > better suited to different formats is going to take a hell of a > performance hit. > Anyone who has those extreme requirements can probably afford to buy the hardware required to run the system. 2 playstation3 boxes would probably provide enough grunt to manage the load for converting on the fly between the formats. Patrick Shirkey Boost Hardware Ltd _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
