On Fri, 2006-06-02 at 12:19 +0000, Andrew Church wrote: > >3) Why do some mp3 files cause transcode to produce content-free avi > >files? > >4) Why do some mp3 files cause transcode to produce avi files with weird > >v-hold sync video streams? > > This is a side-effect of transcode not being able to probe the MP3 > file; if either the video or the audio file cannot be probed, all input > parameters need to be set manually. Notice this line from transcode's > output: > > >[transcode] V: import frame | 720x576 1.25:1 > > If your DVD is NTSC, then it's 720x480, and transcode will end up reading > 1.2 frames at a time--giving you the "scrolling" problem you saw.
If this is the case, then how come I don't get the same scrolling problem when I use an avi as a source rather than the dvd with the same undetectable MP3 file? It seems like if it were going to choose the wrong default for the DVD it would for the avi as well. Also, is this really a desirable behavior to have it throw away the probed settings for everything and choose random dedefaults simply because it couldn't probe one parameter? It seems like we do better in general if we used all the parameters that we could probe, and only used defaults for the ones that we couldn't figure out any other way. > >9) How do I get transcode to produce a MPEG v1 system stream directly? > > Transcode cannot generate MPEG program/system streams directly. This > is something that is under development in CVS, but will not be finished for > a while yet. That's too bad. Is there a way that I can output an MPEG inside of an AVI in such away that when I use ffmpeg to recode it, it can just do a pass though of the video stream and I won't have to bother with requantization degradation? Thanks a lot for your insight, Andrew. -- [EMAIL PROTECTED] Plead the First.
