On Fri, 19 Jul 2019, Carl Eugen Hoyos wrote:
Am Do., 18. Juli 2019 um 22:25 Uhr schrieb William Caulfield
<[email protected]>:
I hope I'm getting your intention right here. I had to do this a while back
for some PAL files. Split the fields, scale, pad, then interlace.
-filter_complex
"yadif=1:0,scale=1440:1080,pad=1920:1080:240:0:black,interlace,setdar=16/9"
If your input is interlaced and you need progressive output (as the last
hardware that was able to correctly show interlaced content died some
time ago), then the correct order is to crop (if necessary first), then
deinterlace.
Cropping odd number of rows from the top can cause interlace issues
obviously.
If you (for whatever insane reason) want interlaced output and you
have interlaced input, you should not use a de-interlacer (as it will
damage the image further), but tell your scaling algorithm that the
input is interlaced (if the scaler does not support interlaced input,
simply split the fields, do whatever is necessary with them, and
put them together afterwards).
I'd be very much suprised if that was true, do you have an example where
an interlaced scaler provides better quality than yadif=1,scale,interlace?
Thanks,
Marton
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