Am Donnerstag, 25. Februar 2010 18:09:31 schrieben Sie:
Hi Georg,
> At the moment it looks like you have to handtune the parameters for some
> clips.
> However the fieldnum=40:mincontrast=0.3 does not hurt for the other movies
> as well. So I would see how far I get with this setting.
I am testing with this:
transcode -J smartdeinter -i "$FILE" \
-x ffmpeg -y ffmpeg,tcaud -F ffv1 -o "$DEINTERFILE"
transcode -J stabilize fieldnum=40:mincontrast=0.3 -i "$FILE" \
-x ffmpeg -y null,null -o dummy
transcode -J transform=zoom=10:smoothing=20 -i "$FILE" \
-x ffmpeg -y ffmpeg,tcaud -F ffv1 -o "$STABLEFILE"
Am I right, that fieldnum=40:mincontrast=0.3 is _not_ needed in the last part?
I tried another test-file, which was not uploaded till now and incredible, it
got fantastic with this options, but it is slow now, 5fps with my Dualcore
5050e. No question, it is worth the time, if it works as with this very shaky
new sample from a dark room.
It's hard for me to understand, why some samples are stabilized and others
not.
The ship-sample is better now. Probably this one belongs to the clips, which
are better not stabilized. The statues in the mountain are more stable now,
but there is a sharpness problem, the flowing river still is more shaky than
the original and with the 4th sample there is no big difference with the
original and the stabilized version.
I have another important question:
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?
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
Al
