[FFmpeg-devel] flashsvenc.c path - fix ability to handle negative linesize
Sat May 12 21:26:09 CEST 2007
"Jason Askew" <jason.askew at gmail.com> writes:
>> Doesn't p->data point to the beginning of the buffer even if linesize
>> is negative ? If so the only thing to add is the abs.
> No, it doesn't. I cleared this up with Michael with detailed
> questioning. When line size is negative, the pointer goes to the
> first column of the last row. Linesize being negative then moves the
> pointer 'up' through the frame.
It's useful to think of it as data pointing to the top-left pixel,
wherever it is in the buffer. Adding linesize takes you one line down
in the image, and so on.
mans at mansr.com
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