[Cin] Again on plugins in floating point (HDR)

Andrew Randrianasulu randrianasulu at gmail.com
Tue Dec 19 03:11:21 CET 2023

вт, 19 дек. 2023 г., 04:59 Phyllis Smith <phylsmith2017 at gmail.com>:

> Was working on this the past week and want to report back that I was able
> to get good results using hdr.tar file from Andrew and following Andrea's
> testing.  But I still want to do more testing because I could not get the
> small_empty_room_1_4k.exr example to give me the same kind of results as
> Andrea displayed in his mp4 demo.

Be sure to set output driver to x11 from x11-opengl ?

> And I do not know how to test the patch provided by Andrew for
> overlayframe.h.

well, if you put two similar video tracks (each having areas where
component values go above 0.5f, so in summation they will be above 1.0f) on
top of each other and set overlay mode to addition - you should get over
1.0f values in compositor ...... And I think if you render with internal
EXR engine you will see on reload or via oiiotool that values in output
file surely above 1.0f.

I am wondering if for now, if it would be sufficient to only apply the
> color3way and histogram patches and not the overlayframe.h patch (I did
> test color3way once without overlayframe.h patch and it seemed to work the
> same) because overlayframe.h is included in quite a few routines.  I do
> need to do more tests also, because when testing using
> HDR_111_Parking_Lot_2.zip file, HDR_111_Parking_Lot_2_Ref.hdr, my laptop
> completely powered off 3 times when I cranked the Value all the way to the
> right in Histogram.  However, this laptop has a bad memory bank so I
> suspect that was the cause.

Well, I wish you best luck in fixing that!

> More later.
> Thanks to Andrew's patch I was able to create an AppImage that has no
>> clipping when using RGBA-FLOAT in X11. I thought of uploading it to
>> Dropbox (I apologize for the security, if you want and request me I
>> will try to upload it to transfer.sh). If you want to test it you are
>> free to download it. One caveat: I created it on my Arch Linux, which
>> is a Rolling, and I don't know if this leads to problems with the
>> appimage working on other distros. It doesn't give me any problems on
>> Arch.
>> https://www.dropbox.com/scl/fi/eku6sto8nxapws4qxjri8/cin-HDR.AppImage?rlkey=mj8uy3jv1gufzc79s70zjckd8&dl=0
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