Hello,
I'm using sample mpeg2 directshow decoder filter from sdk
3.0 beta ( software decoding mode, never tried hardware mode) .
My problem happens with a video which has a resolution of
604x304.
Video Render filter (VR, VR9, EVR) shows video frames with
an aspect similar to 4:3 but in fact should be similar to 16:9.
So after doing some debug at the decoder source code I found
in CDecVideoFilter::RenewSampleParams method that VIDEOINFOHEADER2 is received
with incorrect information, struct comes with dwPictAspectRatioX = 1 and
dwPictAspectRatioy = 1 (but should be dwPictAspectRatioX = 2 and
dwPictAspectRatioy = 1) and that produces the behavior explained above.
I need some help about what's happening, and detect where
the values are wrong filled (linked library,??) of course I can
override the values manually inside the method (which actually works ) but it's
a patch that I would not like to do unless there is no other option.
I tried with a similar video (604x304) but encoded with h264
and it displays correctly with VIDEOINFOHEADER2 filled ok (dwPictAspectRatioX = 2 and
dwPictAspectRatioy = 1) also others mpeg2 decoders ( like Microsoft DTV-DVD Video
Decoder ) works ok.
Thanks in advance
Walter
