On Tuesday 05 April 2005 05:43 pm, Joseph A. Caputo wrote: > On Tuesday 05 April 2005 17:25, Allan Stirling wrote: > > Gregg Casillo wrote: > > > I doubt this is possible in MythTV, but if anyone knows if/how it > > might be > > > > possible to capture to DV or some sort of uncompressed AVI, please > > let me > > > > know. > > > > Riiight. > > > > DV is MPEG2. > > Um... no, DV is not MPEG. What you might be confusing is the fact that > Myth now supports capturing MPEG-2 data over Firewire from digital > set-top boxes. Since Firewire is the common transport for digital > video cameras, it would be natural to assume that they also use an MPEG > codec, but the fact is that they use DV, which is an entirely separate > codec (with much less compression than MPEG, AFAIK). > > However, now that Myth supports a Firewire interface, it should be > possible to write a video capture class that can capture DV. It's been > mention before on either this or the -dev list as being a possibility, > but I don't know if anyone's actually working on it. > > -JAC > _______________________________________________ > mythtv-users mailing list > [email protected] > http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
This is my understanding about DV too. I had a Sony PD150 for a while and transferred from its Mini-DV tapes to my PC via Firewire cable. The "uncompressed" AVI files (I use quotes advisedly because they are actually compressed lightly) I got were in the ballpark of 13GB/hr. I believe this is right for DV files with video & audio included. At both home and work, editing of captured files and archival to DVD are crucial. I know how to go from MPEG2 to MPEG4 which is simple enough, but I rarely do this. However, I'm in the position of having to go from MPEG2 to MPEG2 (without commercials and *with* DVD NAV packets for authoring and burning), and this is proving difficult. It is my understanding that going from a MPEG4 source file to MPEG2 will result in loss of quality. Unless I use a super-high bitrate in my MPEG4 file, no? Gregg _______________________________________________ mythtv-users mailing list [email protected] http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
