In Windows7, Microsoft's decoders are preferentially used.
Microsoft's decoders have some problems in PPD, so I don't prefer to use them.
So, you have to disable Microsoft's decoders.
Please download Win7DSFilterTweaker_5.9.exe from below attachments.
Run downloaded Win7DSFilterTweaker_5.9.exe.
You can see below window.
Click top [Preferred decoders] button.

Change from Microsoft to ffdshow, LAV Video or LAV Audio in H.264 and AAC.
Click [Apply & Close] at bottom.

Next, click [MS Codec Tweaks] button.

Check all and click [Apply & Close].

Setting is completed. Click [Exit] and exit program.