Hi, 0n 06/09/[EMAIL PROTECTED]:19 T told me:
> > First of all, thanks Maik, you've been very helpful. I'll give them a try. > Further... > > On Wed, 13 Sep 2006 17:13:15 +0200, Maik Holtkamp wrote: > > >> I want to use "--export_prof dvd" to set encoding to DVD compliant > >> first, for those many many parameters that I don't have a clue how to > >> set on the command line. However, that comes with a price that the > >> destination frame size is fixed. > > > > I don't think that there are that much parameters included. It basicly > > takes care of: > > > > - size (ok, fixed to 720x576) > > - audio sample rate (48000 Hz) > > - probably it sets a rational bit-rate > > > > But IMHO that's all. > > This is what I dug out from the mlist archive (forgot the link): > > it magically set many things, among > them: "vbv (buffer) size, minimal bitrate, maximum bitrate, max gop size, > default interlacing style (this is set to progressive if you don't use > --export_prof, definitely not what you want!), audio codec and parameters, > use of B-frames", etc... _IMHO_ most this things are handled by the encoder, too. At least if you pass -[F|f] 8 to the mjpegtools it should take care of such things. At least I never ran into issues not giving trancode infos about vbv, gop size, B-frames when converting DV. What I told transcode/mpeg2enc was bitrate (-F 8,"-b xxxx"), interlacing style (--encode_fields) and audio parameters (-E 48000 -y ..,<codec>) and that's it. > > BTW2: If you still have problems with interlacing, skip -I 2 of the > > transcode command, -I 1 you forward to mpeg2enc and include > > --encode_fields t instead. > > I thought "-I 2" means to forward to mpeg2enc to handle it: > > 1 "interpolate scanlines" > linear interpolation (takes the average of the surronding > even rows to determine the odd rows), and copies the even > rows as is. > > 2 "handled by encoder" > tells the encoding code to handle the fact that the frames > are interlaced. Most codecs do not handle this. > > comments? Sorry I had no look at the manpage ;). If that is ok for mpeg2enc, you are done of course. I just remembered that I never had issues using --encode_fields and don't pass interlacing arguments to mpeg2enc. > > IMHO the file you have on the hand is already suiting for dvd, so a > > differnt approach could be (see my previous mail): > > > > mplayer -dumpvideo -dumpfile video.m2v test.mpg mplayer -dumpaudio > > -dumpfile audio.ac3 test.mpg sox (resample to 48000, dunno syntax, sorry) > > mplex -f8 -o video.mpeg video.m2v audio.ac3 > > > > Following this route you will not have to reencode (==quality loss) at > > all. > > Actually, I've tried the mpeg-1 approach, that was my first goal -- no > reencoding. However, here is what I found so far: > > - First I try to burn the vcd mpeg as it. The dvdauth ok with it, but > there is no sound playing back from my DVD player. -- plays fine on PC > though. > > - Then I resample the sound to 48000, this time sound plays well, however, > I was not able to fast forward in my DVD player. Moreover, played in PC > via VLC, I was not able to click/jump to other locations. The whole video > has to be played sequentially. > > - I can't stand watching movies without fast forward / jumping, but I've > ran out of ideas, so gave up this route. :-) > > Any comments? <no intention to blame someone> I think the problem here is dvdauthor, which doesn't handle mpeg1 data the way it should. I only tried this once. About 2 years ago. I was on a holiday safari with my family and the team who organized it filmed some sceens offered to buy afterwards. However, the CD they handed me was vcd *urg*. After I returned home I tried to paste the bought stuff together with some dv films I made myself (trancoded to be dvd compliant, of course) using dvdauthor. However, dvdauthor regulary stumbled on the mpeg1 file :(. In the end I decided to reencode that shit to mpeg, too :(. As Scott more or less retired from dvdauthor development, I suppose there aren't much changes concerning dvdautor and mpeg1 support :(. </no intention...> -- bye maik
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