On 10.01.2007 19:13, Pablo Martin wrote: > Indeed, if the video is PO2 it is rendered,
Depending on the actual values, one of the dimensions may be mapped to
the next lower power of two, and a Blit() would hence blit an area
bigger than the texture, which will cause glTexSubImage (the underlying
API) to fail.
If a video is to be used in a map, using PO2 is adviseable anyway. If
it's to be used for showing some video (a la cinematics), you can try to
get a RECT texture and/or request that the texture is resized towards
the next bigger power of two (so you avoid blitting an area exceeding
the texture).
> but i noticed the method of
> blitting from the texture handle is quite slower than changing the
> texture target (20 fps against 120 with a 256x256 video). Is this
> normal?
Make sure the textures are uncompressed ("nocompress" class). Also try
disabling mipmaps.
> Otherwise seems to me using the other method might help also the
> mng textures (which usually slow down scenes considerably). This might
> be depending on video card though, but the perfomance drop is pretty
> harsh to consider (note blitting from texture handle would be better for
> me as it might help with some r<->b switch).
If red and blue are flipped, either upload the pixels as BGRA8888 or ask
ffmpeg to provide the data in a more appropriate format.
('PIX_FMT_RGBA32' seems to resolve to storage as BGRA. The ffmpeg docs
prolly help with picking the right format:
http://cekirdek.pardus.org.tr/~ismail/ffmpeg-docs/avutil_8h.html#33d341c4f443d24492a95fb7641d0986.)
-f.r.
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