I am decoding an MPEG2 video, padding it to the proper aspect ratio
within a destination video stream. and then encoding that stream.
However, when I specify PIX_FMT_RGBA pixel format, it appears the pixel
formats in the old and new stream are different.
When I play the destination video, I get a properly-padded frame
(letterbox bars on top and bottom), but the image is all greyscale and
repeated 4 times horizontally. I am manually padding the frame since I
could not get av_picture_pad() to do anything. I thought it would be a
simple memcpy() line by line, but am I missing something?
To illustrate what's happening, here are 3 files:
http://www.poldon.com/origframe000.img (raw RGBA data from
original frame)
http://www.poldon.com/paddedframe000.img (raw RGBA data from padded
frame)
http://www.poldon.com/padded.png (screenshot of playing the final
video)
Since both frames are set to PIX_FMT_RGBA in the AVFrame, is there
somewhere else I can tell they're different? The linesize is {2880. 0,
0, 0} for both, so there must be something else.
I appreciate any help anyone might be able to give. If you need any
more details, let me know. Thanks!
-Brian
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