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[Trumpetguy]

I usually play ripped dvds and bds (mkv), and it works great using ROHQ. JRiver Benchmark is above 4000 (i7 with 16GB RAM, nVidia 560Ti video card). I have never been able to play DVDs or BluRay discs directly frommy optical drive. It stutters and freezes constantly, even with RO standard. I attributed this to the drive being too slow, but it may also be connected to Convolution.

I have now ripped a DVD with its structure to .IFO/.VOB on my harddisk, and I am still not able to playback this without severe stutter. Same result with RO and ROHQ. I use convolution. With 15 paths, the convolution runs at ~11x real time. Disabling convolution seems to give smooth video playback. But should not a 11x convolution speed be more than fast enough?

[JimH]

Perhaps a virus checker is causing problems?

[Trumpetguy]

Turning off Microsoft Security Essentials real time check did not make any difference.

[Trumpetguy]

I'll try to rephrase the question, since it seems the problem may be related to Convolution:

Are there anyone that are successfully playing either optical discs, images or harddisk rips (VOBs) using multichannel convolution?

If yes, I would be really grateful to receive any suggestions to why my computer is not able to...

[Scolex]

I would think if anything the 11x is causing the stuttering because it is too high and the stutters are happening during the temporary high load.
I don't use convolution but the above just makes sense to me, this assumes the convolution speed uses a symmetric pattern in that at 11x it only
processes data 9% of the time and the rest of them time it is filling a buffer.
Maybe it doesn't work that way don't know.

[Trumpetguy]

I would think if anything the 11x is causing the stuttering because it is too high and the stutters are happening during the temporary high load.
I don't use convolution but the above just makes sense to me, this assumes the convolution speed uses a symmetric pattern in that at 11x it only
processes data 9% of the time and the rest of them time it is filling a buffer.
Maybe it doesn't work that way don't know.

You may have a point. Only problem is - why is this not a problem when playing the same material in an mkv container (except audio is then pre-decoded and stored as FLAC)?

[Trumpetguy]

I try again - The only video format I can successfully play now is rips stored in MKV container (and of course less demanding material like home videos from my own camera and such).

Are there anyone else that have stuttering problems playing optical disks (dvd or bd) or rips to harddisk?

[Matt]

You won't be able to play a DVD with high-latency audio convolution.

This is because the DVD navigator (Microsoft's part for reading DVDs) won't expose audio more than a little ahead.  This means the convolution can't get enough data ahead of the video being displayed to maintain lip-sync.

We have a system to play DVDs without the navigator, but it's not currently possible to use it for regular playback.  Maybe someday.

[Trumpetguy]

You won't be able to play a DVD with high-latency audio convolution.

This is because the DVD navigator (Microsoft's part for reading DVDs) won't expose audio more than a little ahead.  This means the convolution can't get enough data ahead of the video being displayed to maintain lip-sync.

We have a system to play DVDs without the navigator, but it's not currently possible to use it for regular playback.  Maybe someday.

Oups, I remember now. This topic was discussed before sometime late v16 or early v17. Am I right to assume ripped DVD material stored as VOBs have the same problem, whereas MPEG2 material stored in MKV should always be fine? And what about optical blurays?

Ok, so I will look forward to "someday".

[Matt]

Am I right to assume ripped DVD material stored as VOBs have the same problem, whereas MPEG2 material stored in MKV should always be fine?

Yes.

And what about optical blurays?

I would expect them to work fine with a high audio latency.

[Trumpetguy]

I would expect them to work fine with a high audio latency.

Blyray disc works fine. Funny, this is the first time since JRiver was installed that I actually tried to play an optical disk without ripping it first...

[Mikkel]

Besides reducing the filter length, can there be done something else to fix this problem until a more permanent solution is found? Does there exist alternatives to Microsoft DVD Navigator?


Best regards,
Mikkel