[Cin] Source=ProRes; render=low quality

[Andrew Randrianasulu]

В сообщении от Friday 19 June 2020 00:20:06 Andrea paz написал(а):
> Sorry I'm late.
> The colour space is always set at bt709.
> I get the worst results when I do the downsize from Resources --> Info
> --> resize.
> Big artifacts come out that, I imagine, are produced by the use of "nearest".
> With all the other scaling methods I get a blurred result (almost
> acceptable, but I don't like it). Like the one you showed me.
> If I see bad scaling in compositor, then I also see it in rendering
> (with Vlc or mpv).
> If you have time/will, try a test. Take a prores and try to render it
> in prores again. I get a very dark result, like there was a Subtract
> or Divide overlay...

For me reencoding looks ok:

https://yadi.sk/i/x9rNV-gPQD4nQw (nearly 250 mb!)

vs

https://yadi.sk/i/wqpB27EGBGfgjg (nearly 260 mb!)

BUT I use ffmpeg from git, not 4.2 ...
this is re-encoding done with rgba-8 bit project, not rgba-float:

ANG=C cin
Cinelerra Infinity - built: Jun 15 2020 06:05:01
git://git.cinelerra-gg.org/goodguy/cinelerra.git
(c) 2006-2019 Heroine Virtual Ltd. by Adam Williams
2007-2020 mods for Cinelerra-GG by W.P.Morrow aka goodguy
Cinelerra is free software, covered by the GNU General Public License,
and you are welcome to change it and/or distribute copies of it under
certain conditions. There is absolutely no warranty for Cinelerra.

RenderFarmClient::main_loop: client started
Render::render_single: Session finished.
** rendered 901 frames in 39.937 secs, 22.561 fps


Also, watch out for interlacing in project and asset .. (I set both to not interlaced)

Also, look for exact prores codec setting - by default I have matroska_proxy.prores, not sure if it is default
or one of my experiments .. I set it back to prores.prores
(so you can see textual annotation of various profiles)

Probably color-space must be set to, especially (in encoder settings)
because right now I can't see it set?

file path: /dev/shm/reencode-test.prores
  262381282 bytes
info:
format: mov,mp4,m4a,3gp,3g2,mj2

1 video stream
vid0 (0),  id 0x000093:
  video1 prores  1920x1080 29.97 pix yuv422p10le
    color space:unknown/ range:tv
    901+0 frms 30.06 secs  0:00:30.06

major_brand=qt  
minor_version=512
compatible_brands=qt  
encoder=Lavf58.46.101



strange, even if I put those encoding parameters via dialogs:

colorspace=bt709
color_range=jpeg
color_primaries=bt709
color_trc=bt709

I still get 
color space:unknown/ range:tv

in info ...