> i've been looking around here and there trying to find the best way to get > the video from some DV's i recorded last year to my linux box for > converting to DVDs via Composite 1 (i have yet to use S-Vid), and the best > that i've come up with so far is something like the following in a script: > > mencoder -vf scale=720:480 -vfm ffmpeg -oac mp3lame -of avi \ > -ovc copy /dev/video0 -endpos $2 -o avi/"$1".avi > (i don't know if i should use -oac copy instead, or if it even matters?)
Up to you on the audio. PCM would get better quality, but I've never been able to tell the difference. > this seems to work well, but then i have to turn around and issue this: > > mencoder -ovc copy "$1".avi -forceidx -oac copy \ > -o "$1"copy.avi What happens if you don't do this? What format do you want the .avis in? I think the above syntax will just create video with the standard mpeg2, and with mp3 audio. > then i do any cutting that's necessary in case i've recorded too much > "blue screen" at the end of the tape. > > for an hour's worth of video, this results in a file 3GB+ > i'm guessing i'd get the same results if i just issued a: > cat /dev/video0 >output.mpg ??? Yip. All you're doing is using mencoder to scale the picture. If you want to get the size down, do a 2-pass encode to mpeg4, H.264, divx or whatever. It really depends on what you'll be using to play the files in the future and what codecs that app supports. > i successfully have Myth set up and actually recorded one of my DV's and > it was a bit smaller, i think about 2.3G and i'm pretty sure it was at > least an hour. the problem i see with using Myth to do this, is that i'd > rather not sit there and wait to cue up the DV when Myth starts recording. > :) unfortunately, i don't have any idea what Myth is doing to the file to > make it smaller in size than what i'm doing in my script. > > are the file size(s) i'm seeing normal? is there something i should be > setting via ivtvctl? I think so. mpeg2, which comes out of the PVR-150 encoder (and off satellite/DVB-T signals) runs at about 2-3 Gig an hour. > i have a feeling that i'm off topic here which is not my intent, but i'm > just not sure where else to go for PVR-150 issues/questions which in the > end quite possibly is *not* my question, but in fact is an encoder > question?? > > Best Regards, > -=tim Simon _______________________________________________ ivtv-users mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-users
