Am 2017-02-17 20:32, also sprach Jörg "Yadgar" Bleimann:
> Hi(gh)!
>
> crisp, but after uploading it: a sheer catastrophe! I really have no
> clue how to set parameters in ffmpeg to get a decent quality...
>

That does look bleak.  Did it look good before you uploaded it?
These are my settings for 480p, which is 720x480. (Your 640x400 is an 
oddball size).

ffmpeg  -r 23.976 -i tteoac-%d.png -crf 24 -c:v libx264 -aspect 16:9 
-pix_fmt yuv420p $OUTFILE

The -aspect is because 480p is wacky non-square pixels.

Lower numbers for -crf is higher quality.  This is my 720p (1280x720)

ffmpeg  -y -r 30 -i tteoac-%d.png -s hd720 -crf 18 -c:v libx264 -pix_fmt 
yuv420p $OUTFILE

(and the new 1080p, which looks pretty awesome in previews)
ffmpeg  -y -r 23.976 -thread_queue_size 512 -i tteoac-%d.png -c:v 
libx264 -crf 18 -preset slow -level 4.1 -g 25 -bf 2 -pix_fmt yuv420p 
$OUTFILE

-- 
dik

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