[Theora-dev] erroneous implementation?
andreas.heinchen at gmx.de
Thu Sep 2 05:47:03 PDT 2004
I can reproduce this bug. It occured, when I made a bitrate based encode
with high bitrates (700000). So far I was not able to reproduce the bug
with quality mode. But I have no idea what has happened.
Ivan Popov wrote:
>I am curious, what is the cause of some encoding artifacts,
>I guess part of them should not be present.
>- when encoding with a defined bitrate, some artifacts show up which I'd not
> suppose to be there at all. I attach a screenshot from the beginning og
> Harry Potter 1 at the moment before the "Privet Drive" plate slowly appears
> from the darkness. Note the green and red rectangles.
> It is encoded with -V 600 with encoder_example
> and the effect is there with ot without mmx-optimizations and at other
> bitrates too, though as a bit different pattern, in the same part of the
> screen. I can not see any pattern there in the original.
> (I gamma-corrected (x2) the screenshot to make the effect more visible)
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