[Cin] Report guessed / detected SAR/DAR values

[Andrew Randrianasulu]

пн, 8 янв. 2024 г., 23:50 Terje J. Hanssen <terjejhanssen at gmail.com>:

>
>
> Den 08.01.2024 20:54, skrev Andrea paz:
> > I created a bd.m2ts file by putting "HDV 1080i/25" as the preset.
>
> I think there possibly is a fault in the "HDV 1080i/25" preset (mixed
> with the (FHD) "1080i/25 preset" as mentioned in another post today:
> https://lists.cinelerra-gg.org/pipermail/cin/2024-January/007628.html
>
> > Bd-render worked until the renderig was complete then CinGG shut down
> > (I don't have a BD-burner). Doing ffprobe on this video I get:
> >
> > Input #0, mpegts, from 'bd.m2ts':
> >    Duration: 00:01:06.91, start: 0.074667, bitrate: 10242 kb/s
> >    Program 1
> >    Stream #0:0[0x1011]: Video: h264 (High) ([27][0][0][0] / 0x001B),
> > yuv420p(tv, bt709, top first), 1440x1080 [SAR 1:1 DAR 4:3], 25 fps, 25
> > tbr, 90k tbn
> >    Stream #0:1[0x1100](ita): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz,
> > stereo, fltp, 192 kb/s
> >
> > The video is slightly stretched and reduced to 4:3 from the original
> > 16:9. By applying the downsample filter and setting H and V to 40 the
> > pixels become clearly visible and can be seen to be square.(cfr
> > http://www.g-raffa.eu/Cinelerra/HOWTO/anamorphic.html)
> >
> > In postimage, I have uploaded several screenshots showing the
> > "info--details" of the three original sources that make up the video,
> > of the bd.m2ts (hdv.jpeg) file, and also of how the "set format" is
> > automatically set.
> > [@Andrew, is it possible to put PAR and DAR in the Set Format window
> > as shown in the image?]
> >
> > Note: If I force, in Set Format, the aspect ratio (DAR) to 16:9 I get,
> > with the downsample filter, rectangular pixels. But the video is no
> > longer deformed....
> Yes, I am also curious, because I tried to set the parameters manually
> and then rendered to webm, but still 4:3 format on stored file icon and
> displayed in VLC. I got a feeling that manual changing W Rate to 1.3333
> didn't really work and was changed back to 1.000. Can really Canvas
> Width/Height, W Rate/H Rate and Aspect Ratio in Set> Format be user
> defined independently?
>


(display) aspect ratio surely set as part of "profile" see

cinelerra/defaultformats.h

W rate/H rate seems to be purely informational, as in you can  set user
preset and then manually change dimensions/aspect rate and it will show ..
not exactly rate as num/den, but more like width multiplier / height
multiplier. So, you enter NOT 4 and 3 there (it will make cannas 4*1440
width, 1080 * 3 height!) but 1.3333 and 1.0 to see dimensions go fullHD. or
set fullhd from dropdown menu and see ratio go to 1.333/1.0 Seems more like
local calculator, because ratio[] array is local to this code module and
mainwindow.C does not consult it for SAR - going purely by set display
aspect ratio and dimensions.


I looked at code at cinelerra/setformat.C and I am not sure how it works :)

I will look at screenshots a bit later, now Fennec dog wants out (fireworks
finally faded away)


.
> >
> > The patch seems to work, as "guessed SAR/DAR" and "detected SAR/DAR"
> > appear, but only in source1. In source2 (which is a 4k) there are
> > neither, and in source3 and hdv.jpeg there is only "guessed SAR/DAR".
> >
> > The other 3 patches also seem to work since rendering bd.m2ts worked.
> >
> > https://postimg.cc/kDNqfpT0
> > https://postimg.cc/SJyq5f5J
> > https://postimg.cc/VdD1cbQ4
> > https://postimg.cc/ctWZdRLk
> > https://postimg.cc/tnzbJs1q
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.cinelerra-gg.org/pipermail/cin/attachments/20240109/b2dfa85e/attachment-0001.htm>