[Cin] DAR, PAR and SAR, again

Terje J. Hanssen terjejhanssen at gmail.com
Wed Jan 24 22:55:52 CET 2024

Den 24.01.2024 20:11, skrev Andrea paz:
>> You could possibly try to do a corresponding down-conversion from 1920x1080 using normal Rendering and Set format Preset 1440x1080. This to see if this Format preset works better or not?
> Do you mean because it is vertically narrowed (and DAR 4:3)?
> I tried scaling the mxf movie (1920x1080, sar 1:1, dar 16:9) up to
> 1440x1080 with Scale plugin and I get the same deformation (with
> non-square pixels).
> I have tried setting Width=1440 in Set Format and the result is
> flattened (and crop to the sides). To get the correct display you have
> to put dar 4:3 resulting in a strong crop.
> I have tried applying prest HDV 1080i/25 with the same flattened effect.
> I re-tested with the original video (which is h264/mp4) with the same results.

I have tested up-conversion from hdv 1440x1080 to bd 1920x1080 (took at 
least twice the rendering time of each of the other, switced fps by 
fault may have caused the slow), and got correct display AR:

mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, bt709, top 
first), 1440x1080 [SAR 4:3 DAR 16:9], 25000 kb/s, 25 fps, 25 tbr, 90k 
tbn, 50 tbc

  h264 (High) ([27][0][0][0] / 0x001B), yuv420p(tv, bt709, top first), 
1920x1080 [SAR 1:1 DAR 16:9], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc

Tested also down-conversion from mov 1920x1080 to bd 1440x1080 and got 
correct Display AR:

prores (HQ) (apch / 0x68637061), yuv422p10le(tv, bt709/unknown/unknown, 
top coded first (swapped)), 1920x1080, 182130 kb/s, SAR 1:1 DAR 16:9, 25 
fps, 25 tbr, 2500 tbn, 2500 tbc (default)

h264 (High) ([27][0][0][0] / 0x001B), yuv420p(tv, bt709, top first), 
1440x1080 [SAR 20833:15625 DAR 83332:46875], 25 fps, 25 tbr, 90k tbn, 50 tbc

I used Einhander's latest built: Jan 19 2024 22:51:47
Do you use the Andrew's "BD creation aspect 16:9 fixes" from that time?

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