Thanks for your hints, Herman!

I use that down-scaled video only as a proxy. When I set up the
project, I render the final video from 1920x1080p videos. The original
1080p clips were recorded on Canon 600D with Magic Lantern, bitrate
was set to 0.7x to save some disk space:

Stream #0:0(eng): Video: h264 (Constrained Baseline) (avc1 /
0x31637661), yuvj420p, 1920x1088, 30516 kb/s, 23.98 fps, 23.98 tbr,
24k tbn, 48k tbc

When I tried your trick with blurring the U and V channels, it helps
with the block artifacts a bit, but it is still not as good as
avidemux and when I set the blur radius too high, color from small
spots like the yellow from sea-marks vanishes :o(

I really like the output of avidemux for both 640x360 and 1920x1080 videos.

Is anybody able to improve the code for 4:2:0 -> 4:4:4 conversion in Cinelerra?

Another option would be doing the color correction in avidemux and
then load the clips in Cinelerra. But it is not very convenient :o(

Michal

On 17 January 2012 22:05, Herman Robak <her...@skolelinux.no> wrote:
> På Tue, 17 Jan 2012 21:26:51 +0100, skrev Herman Robak
> <her...@skolelinux.no>:
>
>
>> I still see a lot of flickering blocks in the top of the image,
>> though.  Maybe Avidemux has a dynamic deblocker enabled, too?
>
>
> Nah, Avidemux' output flickered pretty badly near the top, too.
> Blocky, blocky!  Higher bitrate, if you please!
>
>
> --
> Herman Robak
>
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> Cinelerra mailing list
> Cinelerra@skolelinux.no
> https://init.linpro.no/mailman/skolelinux.no/listinfo/cinelerra

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