Thanks to those of you who has replied so far. First I have to say I'm a novice on this topic, but try to figure out and understand some more about what happends, and what is possible in practice by help of some top-down questions:
On Mon, 11 June 2007 17:39, Terje J. Hanssen wrote: >> 1) Is Cinelerra capable to preserve mpeg2 with 4:2:2 color space >> throughout the editing process? On Mon, 11 Jun 2007 Andraz Tori replied: > Yes, cinelerra internally works in 4:4:4. On Mon, 11 Jun 2007 Johannes Sixt replied: > No. Cinelerra decodes and re-encodes. But it has YUV color space. On Mon, 11 Jun 2007 Aaron Newcomb replied: > So, what does this mean really? If Cinelerra decodes and re-encodes > what do you lose in the process? And what about 4:4:4 as was mentioned > earlier? Q1) "Native" 1080i HDV (mpeg2 4:2:0) editing in Cinelerra Looks like here may be a misunderstanding. I myself have thought this was done without any decoding and recoding in Cinelerra? Q2) Utilizing mpeg2 4:2:2 for better quality in Cinelerra Even that Cinelerra internally decodes and encodes to another color model YUV, is it correct that Cinelerra can read in higher quality HD as mpeg2 4:2:2 and utilize (preserve) this higher quality during editing for a better end result? Q3) dvgrab with "hdv patch" for 422 mpeg-2/-4 Is the mentioned "hdv patch" for dvgrab limited to capture HDV mpeg2 of [EMAIL PROTECTED] (4:2:0) only, or can it capture all types of mpeg2, also higher HD of [EMAIL PROTECTED] and [EMAIL PROTECTED] Q3) "Native" MPEG-4/H.264 editing According to HW Cinelerra http://heroinewarrior.com/cinelerra3.php3 "H.264 was standardized in Quicktime 7. Now Cinelerra can encode and decode video in razor sharp, ultra low bitrate H.264 with playback on Win and Mac commercial players and your favorite Linux players. This is one of the highest quality video codecs around, making HDTV distribution over the internet almost practical." Can also Cinelerra CV do this "native" MPEG-4/H.264 editing? AFAIK, H.264/MPEG-4 AVC is also the actual format used to burn to and play on HD-DVD or BD media, possibly at Hi422P 10bit? http://forum.doom9.org/showthread.php?t=96059 http://www.blu-raydisc.com/Section-14029/Section-14033/Section-14038/Article-14847.html Q4) Cinelerra CV Manual suggestion Possibly the manual preferably may be updated and deepened a little more on the above topics in section 1.5.6 MPEG video, encoding and color models? (sorry that I'm not qualyfied for this task except to ask the questions) http://cvs.cinelerra.org/docs/split_manual_en/cinelerra_cv_manual_en_5.html#SEC74 -- Terje _______________________________________________ Cinelerra mailing list [email protected] https://init.linpro.no/mailman/skolelinux.no/listinfo/cinelerra
