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fix Full vs Restricted color issue by conversion to sRGB

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thanks to @PancakeTAS for this discovery
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F. Duncanh
2024-12-19 21:04:51 -05:00
parent 47783de5de
commit b1fb510333
7 changed files with 77 additions and 12 deletions
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README.md
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@@ -1121,8 +1121,19 @@ Video4Linux2. Equivalent to `-vd v4l2h264dec -vc v4l2convert`.
**-bt709** A workaround for the failure of the older Video4Linux2 plugin
to recognize Apple's use of an uncommon (but permitted) "full-range
color" variant of the bt709 color standard for digital TV. This is no
longer needed by GStreamer-1.20.4 and backports from it.
color" variant of the bt709 color standard for digital TV. This was no
longer needed by GStreamer-1.20.4 and backports from it, but appears to
again be required in GStreamer-1.22 and later.
**-srgb** A workaround for a failure to display full-range 8-bit color
[0-255], and instead restrict to limited range [16-235] "legal BT709"
HDTV format. The workaround works on x86_64 desktop systems, but
does not yet work on Raspberry Pi. The issue may be fixed in a future GStreamer
release: it only occurs in Linux and \*BSD.
**-srbg no**. Disables the -srgb option, which is enabled by default in
Linux and *BSD, but may be useless on Raspberry Pi, and may be unwanted,
as it adds extra processing load.
**-rpi** Equivalent to "-v4l2" (Not valid for Raspberry Pi model 5, and
removed in UxPlay 1.67)