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...
> 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?
> 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?
