Re: Get frame rate of mpeg1 video

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On Aug 5, 1:45 pm, "Shugo_Ishida" <syu5....@xxxxxxxxxxxxx> wrote:
<antonio.ble...@xxxxxxxxx> wrote in message

news:ef3b6244-90cf-4657-9c95-c9e973d3db7e@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

Hi,

I have two types of mpeg1 videos, PAL and NTSC.
I use DirectShow to play the movies and I
need a way to know whether the movies are
sampled in 29.97Hz (NTSC) or 25Hz (PAL). I
don´t seem to find a method in DS to retrieve
that information (although it is somehow
interpreted correctly by DS). Any suggestions?

Regards,

Toni

You can obtain it as the VIDEOINFO or VIDEOINFO2 from a output pin on a
MPEG-1 Video Decoder Filter.

http://msdn.microsoft.com/en-us/library/ms787302(VS.85).aspx

Ok, cool, that should do the trick. What about other codecs? Ain´t
there a more general way to query this information? I mean the clock
must trigger in a certain frequency, no way to retrieve that?

Thank you and best regards,

Toni
.

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