http://bugs.cinelerra.org/show_bug.cgi?id=481
Summary: Request for automatic color scale conversion support
Product: Cinelerra
Version: 2.1
Platform: PC
OS/Version: Linux
Status: NEW
Severity: enhancement
Priority: Medium
Component: Rendering
AssignedTo: [email protected]
ReportedBy: [EMAIL PROTECTED]
(Component is not limited to rendering, but I can't select two...)
Cinelerra loads MPEGs and still frames as-is, without thinking about it's color
range. This has a multitude of consequences. For example, when I load an MPEG4
in Cinelerra and also render it to MPEG4, the output file has the correct color
scale, because RGB value 16-16-16 was black in the original, and will be black
when playing the rendered file. However, when you render that same project to
PNGs and then use an external encoder (like mencoder) to encode to MPEG4 (which
I prefer, because mencoder is a very good encoder), the resulting video is too
bright, because the external encoder will think that the color range of PNG is
0-255, and it would be right about that. Therefore, 16-16-16 will turn out as
grey.
Right now, one has to use the RGB-601 filter to do it manually, but this is
very cumbersome. For example, if I render to any mpeg format with Cinelerra, I
have to compress the range of any format which uses 0-255, like still PNGs.
But, should I choose to render to a PNG sequence, I have to do the exact
reverse: expand the color range of all the mpeg source material and leave the
still frame as-is.
My request is that this is done automatically, in a way that both the X11 and
XV drivers display the correct brightness/contrast in the view-file and
composite windows.
Reproducible: Always
Steps to Reproduce:
[not applicable]
Actual Results:
[not applicable]
Expected Results:
[not applicable]
[not applicable]
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