Am Freitag, 26. Februar 2010 11:04:19 schrieb Georg Martius:
> On Thursday 25 February 2010 21:59:27 Al Bogner wrote:
> > Am Donnerstag, 25. Februar 2010 18:09:31 schrieben Sie:
Hi Georg.
> > So if these options are unused, why was the boat video better.
>
> </copied from other email>
> I don't know. Did you use maxangle=0 as well?
No, I didn't Can you imagine, that a load of 10 influences the result?
Forget it, I think we can't find it out and I do not have the files anymore to
compare.
> > It's hard for me to understand, why some samples are stabilized and
> > others not.
>
> This is due to the fact that the stabilize algorithm is using small
> measurement fields that are placed on the frames. The river for example
> causes the illusion (for many local fields) that the camera is moving.
> Since this is not the same on all frames the stabilizing is not so well. A
> whole picture version is used with stabilize=algo=0. This is very slow and
> does only do translations and no rotations.
I tried
transcode -J stabilize=fieldnum=40:fieldsize=48:mincontrast=0.3 \
-i "$DEINTERFILE" -x ffmpeg -y null,null -o dummy
and had 2.5 fps.
I can try with algo=0. Which paramters should I use else in the example above.
It is this strange extension-file, from the other thread, where I can't get
the right aspect ratio.
This kept 4:3
transcode -i "$FILE" \
-x mplayer \
-J smartdeinter \
-N 0x1 -y ffmpeg,tcaud -F ffv1 --export_par 4 \
-o "$DEINTERFILE"
> > Kdenlive has a preset for 768x576 non-interlaced only, the original is
> > 720x576 or 704x576 interlaced. What do I have to do to get 768x576 as
> > result?
>
> Mh, maybe just adding again a black border to it? Doesn;t Kdenlive do that?
> Otherwise I know that ffmpeg can do that nicely.
Well, a black border is inacceptable. Maybe it makes sense to do a crop for
768x576 when creating the deinterlace file?
With stabilizing I do:
transcode -J smartdeinter -i "$1" \
-N 0x1 -x ffmpeg -y ffmpeg,tcaud -F ffv1 \
--export_par 1 -j 32,16,40,32 -Z 768x576 \
-J unsharp=luma=0.8:luma_matrix=7x5:chroma=0.1:chroma_matrix=3x3 \
-o "$2"
Sharpening should be better done, when stabilizing I think.
I have no idea how to create own profiles with kdenlive, but I read that
people did. At least in the menus I couldn't find a way to do this. I think
there is a compatibility reason, why 720x576 non-interlaced isn't available.
> > When and where to do I add filters for denoising and sharpening? The
> > quality is always similar to the files you have. S-VHS tapes need not to
> > be denoised, but a little bit sharpened.
> >
> > Which options do you recommend?
> >
> > Without stabilizing I use this sharpening options as last filter:
> >
> > -J unsharp=luma=0.8:luma_matrix=7x5:chroma=0.1:chroma_matrix=3x3
>
> This you can add to the transform call simply as
> -J
> transform=.....,unsharp=luma=0.8:luma_matrix=7x5:chroma=0.1:chroma_matrix=3
> x3
Thanks
Al
