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<blockquote data-quote="jet70" data-source="post: 414489" data-attributes="member: 89373">Yes this is annoying the hell out of me - I have been doing a lot of testing and have some observations.The issue, in my case at least, is experienced with hi-def mkvs.I use Vista 32, EVR and MPC Video codec with Integrated HD3200.Interestingly, I find the refresh rate changes to 24hz and the movie plays fine if MPC can render the movie using hardware acceleration i.e. my CPU usage is below 10%Any movies using this codec that are not rendered using HA seem to incur audio (vocal) lag. This can be quite significant and very noticeable.If I render the mkv in Graphedit, check the codecs, and then play it in Graphedit, it plays fine.I am using AC3Filter but to be honest, I don't think this is anything to do with the audio encoder.Althought the mkvs using software decoding exhibit lag, this is not due to spiking of the CPU to 100% - the CPU cores remain within 50%-80%. If I disable refresh rate changes, the audio is not affected, but I get stutter in the picture (obviously).This seems to be something to do with the refresh rate changer and Mediaportal's rendering.I hope this info is of some help. I realise that others have these same problems with different codecs/ hardware etc. but I thought it was very interesting that in my case all movies that are rendered by MPC with HA are OK.Is there a way I can remux an exisitng mkv to make it suitable for HA renedering?? - I am afraid I am pretty unfamiliar with all this mkv container stuff, so apologise if I am asking a stupid or impossible question.</blockquote>

[QUOTE="jet70, post: 414489, member: 89373"] Yes this is annoying the hell out of me - I have been doing a lot of testing and have some observations. The issue, in my case at least, is experienced with hi-def mkvs. I use Vista 32, EVR and MPC Video codec with Integrated HD3200. Interestingly, I find the refresh rate changes to 24hz and the movie plays fine if MPC can render the movie using hardware acceleration i.e. my CPU usage is below 10% Any movies using this codec that are not rendered using HA seem to incur audio (vocal) lag. This can be quite significant and very noticeable. If I render the mkv in Graphedit, check the codecs, and then play it in Graphedit, it plays fine. I am using AC3Filter but to be honest, I don't think this is anything to do with the audio encoder. Althought the mkvs using software decoding exhibit lag, this is not due to spiking of the CPU to 100% - the CPU cores remain within 50%-80%. If I disable refresh rate changes, the audio is not affected, but I get stutter in the picture (obviously). This seems to be something to do with the refresh rate changer and Mediaportal's rendering. I hope this info is of some help. I realise that others have these same problems with different codecs/ hardware etc. but I thought it was very interesting that in my case all movies that are rendered by MPC with HA are OK. Is there a way I can remux an exisitng mkv to make it suitable for HA renedering?? - I am afraid I am pretty unfamiliar with all this mkv container stuff, so apologise if I am asking a stupid or impossible question. [/QUOTE]

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