Log in

View Full Version : Windows Media Player, mp4sdecd, Macroblock size?


Cyberman
15th December 2014, 23:26
(If the thread should be in one of the MPeg4 forums, please move. I wasn't sure.)

Apparently - I'm not entirely sure yet - the codec mp4sdecd which is used by WMP (12) has a problem with very low resolution videos. 240x176 is the resolution - it stutters, it hangs, it repeats itself.

I was wondering if maybe the ratio is the problem - it IS 16x16, but perhaps the codec needs 32x32? Or simply a bigger resolution?

I know that when the resolution is not 16x16, it'll generate display errors (green line on screen and such).

Or maybe I'm entirely wrong? Does anyone know more about that?

(I'd love to simply ignore it, but C# MediaElement uses WMP it seems.)

[edit]Well, seems I was wrong. I think I found out why the videos were stuttering. Apparently WMP can't cope with B-Frames. I recoded a video using DivX and no B-Frames, and suddenly it works.
There must be more wrong than just the B-Frames, though, as other computers could cope with them. Still, I'll recode the vids without B-Frames (didn't really save much anyway), and be done with it.