On Tue, 3 Oct 2000, Andrew Stevens wrote: > Trent Piepho wrote: > > > mp1e 1.8.0-pre3 creates acceptable mpeg-1 movies, although the lack of > > > proper motion compensation requires the use of double bitrates in order to > > > get acceptable quality output. > > > > Do you know if mp1e generates I frames only, or does it generate P or even B > > frames with no motion compensation? > > The version I was given by the author does P and B frames too but > doesn't do motion compensation (yet?). Its not a public release tho - > you should contact the author for source... In real time on a reasonable machine? That's pretty impressive. Of course there is big range in what generating a P/B frame could entail. You could just take the current frame, difference it from the last one, and call it a P frame. The marginal cost of folding a difference operation into the DCT would really be very little. Now if you compare each macroblock to the corresponding ones from the last N preceding frames and the following N frames, and choose the one that compresses the best, that's a lot more work. > > > But I've been able to play these streams with mtv, smpeg, and when recorded > > > onto a CD-RW disc, my Sony standalone DVD player. > > > > How fussy is a DVD player at playing mpeg 1 CDs? Must they be in a special > > VCD format and resolution? Or can they take an ISO9660 cdrom with a mpeg file > > on it and play that? > > The stand-alone players I'm aware of all expect VCD format (which has > some sync information in the sector info as well as the actual MPEG > payload). The directory structure is essentially ISO, but the So if I have something at a different resolution, like 320x184 (16:9 tv show), then trying to make a VCD out of it is hopeless? > Odd ... I couldn't persuade you to try MPEG-1-ing the MJPEG's with the > mjpeg version of the MPEG tools? It'd be very handy to find out if > there's a glitch in the MPEG syntax generated that the Linux players > ignore. I don't use windows myself. I recorded the Sci-Fi channel's letterboxed airing of Babylon 5 and one of the episodes contained a rather funny editing goof that wasn't in the previous versions. I put a mpeg clip on my web page <http://www.speakeasy.org/~xyzzy/> so people could see it, but windows users tell me they can't play it.
