On Sun, 21 Sep 2003, Maarten De Boer wrote:
> First of all, sorry for the crossposting, but it seems to involve
> everything.
I am replying just to the mjpegtools list since I think, at least
for now, that is where the problem is.
> I am trying to convert mini DV (PAL) to SVCD, but so far no luck..
>
> Feeding dvgrab --format dv2 to lav2yuv gives a distorted image;
> totally green, with blocks. If I understand this correctly, this is
> because dvgrab generates YUV422 instead of YUV420 (YV12),as mentioned
> in http://www.geocrawler.com/archives/3/3147/2001/6/0/5959308/
Hmmm, I thought that dvgrab created files with either 4:1:1
(NTSC) or 4:2:0 (PAL). PAL DV is 422? I didn't know that
was the case. Today wasn't a total loss - I learned something ;)
Ah, I see that libdv's configure can select either YV12 or YUY2
for PAL.
How are you playing/viewing the data? With playdv? Or some other
method?
> When I try with
>
> libdv-0.99# ./configure --prefix=/usr --with-pal-yuv=YV12
>
> The image is ok (no blocks) but very green with purple.
Did you remember to configure mjpegtools with:
./configure --with-dv-yv12
Perhaps the lav* programs need to be told that PAL YV12 is being
used.
If both mjpegtools and libdv are configured for YV12 that might
solve the problem.
> Now, as suggested [EMAIL PROTECTED] in a previous mail, I
> used smilutils-0.2.0, but that segfaults on me directly. :-(
> Any suggestions/explanations? Maybe how to convert YUV422 to
> YUV420? Or why smil2yuv crashed?
Rather difficult to debug a crash without at least a gdb trace
;)
One thing that might be useful is to use "--format raw" instead
of "--format dv2" when using dvgrab. With 'raw' there is no
.avi overhead and the file is 144000 bytes/frame for PAL (120000
for NTSC) which makes it very simple to use 'dd' as a crude
extraction/editing tool.
> On a sitenote, with gcc version 3.3.2 20030812 (Debian prerelease)
> I had to add assert.h in avi.cc, filehandler.cc and riff.cc
I had to do the same thing with SuSE 8.2 and gcc-3.2.2 I believe.
Since it's C++ I added <cassert> instead of <assert.h>
> in dvgrab-1.2 and smilutils-0.2/libkino
The CVS version of smilutils has the <cassert> added so changes
should not be needed.
Good Luck!
Steven Schultz
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