SpeedRatio is ignored

[tpgalan]

Hi,

When I play a video and change the SpeedRatio value it has no effect.

My code example:

mediaUriElement.Source = new Uri(@"test.mp4");
mediaUriElement.SpeedRatio = 4.0;

Is this correct?

[xmedeko]

Set the speed ration after the media has been opened (the MediaOpened event).

[skaterlui]

Hello tpgalan,

I use the speed ratio thing a lot. It depends on the codec which is used to decode the media if it supports speed ratio setting or not. It doesn't matter if speed ratio is set after or before media is opened. With h.264 speed ratio 4.0 is the maximum I get with K-Lite-Codec-Pack and LAV. If I set it to 8.0, the setting is ignored and speed ratio is still 4.0. I have no special tweaks in K-Lite. I attached my settings.
CodecSettingsBackup20171108.zip

Check this clip: https://www.youtube.com/watch?v=QVx-_HpHe7c for speed ratio example.

[skaterlui]

@tpgalan
You can also check this link from the old mediakit
https://wpfmediakit.codeplex.com/discussions/85603

[xmedeko]

I am closing the issue. @tpgalan reopen it, if your problem is not caused by the codec.

You can also set a custom sync clock:

IMediaFilter filt = Graph as IMediaFilter;
clock = new MyCustomClock(); // DirectShowLib.IReferenceClock
filt.SetSyncSource(clock);