Before figuring out how to make an appsrc take an OpenGL texture, I wanted to pass an RGB buffer. I played with
this example for a while and ended up with
this code.
Like
the example, I can happily get the screen to alternate between white and black. However, I don't understand the structure of the buffer
GStreamer expects.
Why does GStreamer seem to expect the minimum buffer size to be WIDTH * HEIGHT * CHANNELS + HEIGHT? Why is it not just WIDTH * HEIGHT * CHANNELS for an RGB buffer (where the array passed as the buffer is an array of bytes)? Why would I want to pass a larger buffer?
Also, when I try to set
the colour to green, red or blue and only write to the first WIDTH *
CHANNELS bytes in the buffer I get one clean row of the expected colour.
However, this row changes colour when I write to the next WIDTH *
CHANNELS bytes. Why is this? How do I fix it?
I suspect the queries are related. Thanks in advance.
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