Small playback hacks in some videos

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Small playback hacks in some videos

Post by spuuunit on Mon Mar 11, 2013 10:11 am

Hi. I've been using this flawless player for years, but now I'm having my first problem.

When I play some videos I get small playback hacks sometimes in the video. Exactly what I mean with that is that at certain points with some videos, it skips certain small parts of the video, only like 100 ms maybe, but it's still noticeable and frustrating. The audio remains fine though. The hacks always occurs at the same points in the video, and it's often when fast things happen in the video.

Try this video. It hacks at 09-10 sec. It plays fine with VLC, so it's nothing wrong with the video.

Thanks in advance.

spuuunit

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Re: Small playback hacks in some videos

Post by Admin on Mon Mar 11, 2013 10:59 am

I will test it tomorrow.

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Re: Small playback hacks in some videos

Post by spuuunit on Mon Mar 11, 2013 12:08 pm

Sure, thanks.

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Re: Small playback hacks in some videos

Post by widhie75 on Mon Mar 11, 2013 8:17 pm

I already try to play this file...... and it is lag in my PC.

The reason might be:
This file is HD format, 1920x800
Overall bitrate: 16.6 Mbps

My PC is old and only have RAM 2GB, processor AMD.

As far as I know, to run HD/Blueray format, we need high end PC & Display adapter (VGA Card).
Make sure our PC meet enough requirement to play HDTV-BlueRay movie.

but i'll try VLC

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Re: Small playback hacks in some videos

Post by spuuunit on Mon Mar 11, 2013 11:35 pm

widhie75 wrote:I already try to play this file...... and it is lag in my PC.

The reason might be:
This file is HD format, 1920x800
Overall bitrate: 16.6 Mbps

My PC is old and only have RAM 2GB, processor AMD.

As far as I know, to run HD/Blueray format, we need high end PC & Display adapter (VGA Card).
Make sure our PC meet enough requirement to play HDTV-BlueRay movie.

but i'll try VLC

I've played raw 40 GB Blu-Ray videos before with no lag. And I have a pretty strong computer. So I don't think it's that.

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Re: Small playback hacks in some videos

Post by Admin on Tue Mar 12, 2013 12:43 am

It isn't a performance issue. The glitch also happens with very low CPU usage.

This should solve it:
ffdshow audio decoder > decoder options > uncheck "enable jitter correction"

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Re: Small playback hacks in some videos

Post by spuuunit on Tue Mar 12, 2013 3:47 am

Admin wrote:It isn't a performance issue. The glitch also happens with very low CPU usage.

This should solve it:
ffdshow audio decoder > decoder options > uncheck "enable jitter correction"

Thanks! This solved the issue completely!

So it was the audio that was "hard to play"? This setting doesn't make the sound "bad" does it? In any case I can't hear any difference right now.

Anyhow, thanks so much for the help! Very Happy

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Re: Small playback hacks in some videos

Post by Admin on Wed Mar 13, 2013 3:13 am

Jitter correction is used to detect anomalies with timestamps and it will perform a seek when jitter gets above a certain threshold. The purpose is to maintain A/V sync.

For proper files such corrections are never necessary. It's only for specific situation, for example with recorded live video.

DTS audio is a bit special because some DTS encoders use a slightly different frame rate as the video. This causes a little bit of jitter, which can accumulate high enough to trigger the jitter correction to kick in.

I will ask one of the ffdshow developers about this issue. Maybe they can improve the algorithm.

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Re: Small playback hacks in some videos

Post by spuuunit on Wed Mar 13, 2013 4:02 am

Okay. Well, I'll leave the jitter correction disabled for now, that seem to work just fine for me.

Thanks a bunch for your help. Much appreciated. Very Happy

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Re: Small playback hacks in some videos

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