[BUG] changing colour space with VUI (wrong syntax passed to FFMPEG)

[MacNB]

Here's details:

What Hybrid version did you use?
rev 2022.03.20.1 running on macOS Mojave 10.14.6

What did happen?

-> 2023-11-04@17_38_45_2210_03_video crashed: ERROR: /Users/MacNB/Movies/Hybrid/tmp/V8-Original-Sample-01-DeInt_2023-11-04@17_38_45_2210_03.mov was not created!Aborting '2023-11-04@17_38_45_2210_03_video' due to: ERROR: /Users/MacNB/Movies/Hybrid/tmp/V8-Original-Sample-01-DeInt_2023-11-04@17_38_45_2210_03.mov was not created!

What did you do to get to the bug?
In the ProRes Tab, I click VUI check box and set Primes to bt470bg, Transfer to bt709 and Matrix to bt470bg.
(I have a screenshot but can't seems to post it directly here).

In the same tab, at the bottom, there's the FFMPEG command line that shows the issue:

ffmpeg -y -i - -vcodec prores_ks -profile:v 2 -vtag apcn -bsf:v prores_metadata=color_primaries=bt470bg:color_trc=bt709:colorspace=bt470bg -f mov "/Users/MacNB/Movies/Hybrid/tmp/V8-Original-Sample-01-DeInt.mov"

The bug is the syntax for prores_metadata parameter. I believe there should be no "=" after prores_metadata otherwise it's an invalid parameter

Debug output would be helpful
Debug file attached [attachment=2098]

The ERROR line from the Debug log shows:

2023.11.04 - 17:38:47_macOS Mojave (10.14) (64bit)_2022.03.20.1 - level 9: FFmpeg output: [prores_metadata_bsf @ 0x7fa40df02440] [Eval @ 0x7ffee9cebf70] Undefined constant or missing '(' in 'bt470bg'[prores_metadata_bsf @ 0x7fa40df02440] Unable to parse option value "bt470bg"Error parsing bitstream filter sequence 'prores_metadata=color_primaries=bt470bg:color_trc=bt709:colorspace=bt470bg': Invalid argument

a small sample, which allows the reprocudtion of the problem would be nice
A trimmed down clip of the input file attached.
Please, read the 'Infos needed to fix&reproduce bugs,..'-sticky before you post about a problem.