Doh, I mispoke, see my change below: On Friday 25 November 2005 11:12 pm, Paul V. Gratz wrote: > On Friday 25 November 2005 04:32 pm, ffrr wrote: > > I am fairly new to converting video, so I have been trying to discover > > the best way to convert my recordings (PAL mpeg-TS from a DVB-T card) to > > a small format suitable for my Palm Tx PDA. > > > > Firstly, I have read that divx is a popular format and the TCPMP player > > on the palm will play it. Is xvid the same thing? What's the > > difference? Any other suggestions for a target format? > > I have a treo 650 and I've encoded a few shows for it. I have been > using mencoder to encode it to the built-in lavc endcoder for divx. > In my understanding divx is an early implementation of mpeg4 (prior to > the release of the standard). Xvid is another. I'm not sure what the > relative differences are but I think they more or less amount to the > same kind of quality per bitrate. Now that mpeg4 is out I think they > both produce legal mpeg4 output. > > > OK, so I have experimented with nuvexport. Unfortunately, under > > Knoppmyth R5A22, nuvexport with ffmpeg seems to be broken, so I tried it > > with --transcode and chose xvid format and a screen width of 240 (a > > suggestion as a reasonable compromise in quality and size). The show I > > am converting was 3.9GB in size. The problem is, on my mythbox, which > > is only a 800MHz celeron, it has been over 12 hours, the target file is > > 200MB and it's still not finished ! > > > > I tried running transcode manually from the command line on a faster > > (non-myth) machine I have. It's a 2.2GHz sempron. I used this command > > line > > > > transcode -i in.mpg -V -x mplayer -y xvid4,xvid4 -Z 240x160 -E 16000 -b > > 48,1,7,1 -w 150 -f 24,2 -o out.avi > > > > but it still is going slow (<20 fps) > > > > > > > > So, I guess I am hoping for some suggestions on better ways to do this?
I get much better performance using mencoder (part of mplayer). Its something like 15-20 minutes to encode a 1 hour program on my P4 2.8Hz HT machine. I use nuvexport to give me the raw *.nuv file then I run mencoder on that file to re-encode for my palm machine. Here is the mencoder command line I use: (I use nuvexport not mythtranscode) > mencoder -o outfile.avi -aspect 4:3 -ovc lavc -lavcopts > vcodec=mpeg4:mbd=2:turbo:vbitrate=300:aspect=4/3:acodec=mp3:abitrate=96 > -oac lavc -vf-pre pp=lb -vf scale=320:200 -af volnorm infile.nuv > > Replace outfile.avi and infile.nuv with the input and output files you > want. The resultant file is ~150MB for 1 hour. The quality is very > high so you could probably halve the 300kbs bit rate and still have a > usable video if you want smaller files. > > The assumption is that you are going from a full screen TV program to > a full 4:3 aspect ratio output file. You can get slightly better > quality if the program is 16:9 and you crop it but it may be more pain > than its worth (look at the mencoder man page for the info on > autocrop). > > > _______________________________________________ > > mythtv-users mailing list > > [email protected] > > http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
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