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ok, i had problems with lipsync and DD and DTS files as many have on 24hz playback. I was experimenting yesterday with everything and somehow I fixed it!!
First I used reclock to force media playback to 25fps on 50hz refresh rate and av sync is great, but reclock drops ac3 frames and it's annoying..
Then, I disabled reclock, put ffdshow as the h.264 codec (I have h.264 set to disabled and raw to all so that the coreavc kicks in - I had to mannualy unregister MPV codec!) and ac3 filter for audio codec and default directsound device as audio renderer (I have spdif optical cable to my receiver which handles decoding). ac3 filter is set to use spdif, passtrough all audio - DD, DTS and MPEG, but what seems was causing trouble was JITTER CORRECTION! After disabling it everything was in sync! PERFECT PLAYBACK on all movies and series I had trouble before!
So maybe someone can see if it help him/her and report back
I'm happy happy happy, perfect lipsync 5.1 audio finally
Of course, without refresrate changer, this would be very difficult, thank you!

<blockquote data-quote="akiaki" data-source="post: 343924" data-attributes="member: 82570">ok, i had problems with lipsync and DD and DTS files as many have on 24hz playback. I was experimenting yesterday with everything and somehow I fixed it!!First I used reclock to force media playback to 25fps on 50hz refresh rate and av sync is great, but reclock drops ac3 frames and it's annoying..Then, I disabled reclock, put ffdshow as the h.264 codec (I have h.264 set to disabled and raw to all so that the coreavc kicks in - I had to mannualy unregister MPV codec!) and ac3 filter for audio codec and default directsound device as audio renderer (I have spdif optical cable to my receiver which handles decoding). ac3 filter is set to use spdif, passtrough all audio - DD, DTS and MPEG, but what seems was causing trouble was JITTER CORRECTION! After disabling it everything was in sync! PERFECT PLAYBACK on all movies and series I had trouble before!So maybe someone can see if it help him/her and report back <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" />I'm happy happy happy, perfect lipsync 5.1 audio finally <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" />Of course, without refresrate changer, this would be very difficult, thank you!</blockquote>

[QUOTE="akiaki, post: 343924, member: 82570"] ok, i had problems with lipsync and DD and DTS files as many have on 24hz playback. I was experimenting yesterday with everything and somehow I fixed it!! First I used reclock to force media playback to 25fps on 50hz refresh rate and av sync is great, but reclock drops ac3 frames and it's annoying.. Then, I disabled reclock, put ffdshow as the h.264 codec (I have h.264 set to disabled and raw to all so that the coreavc kicks in - I had to mannualy unregister MPV codec!) and ac3 filter for audio codec and default directsound device as audio renderer (I have spdif optical cable to my receiver which handles decoding). ac3 filter is set to use spdif, passtrough all audio - DD, DTS and MPEG, but what seems was causing trouble was JITTER CORRECTION! After disabling it everything was in sync! PERFECT PLAYBACK on all movies and series I had trouble before! So maybe someone can see if it help him/her and report back :) I'm happy happy happy, perfect lipsync 5.1 audio finally :) Of course, without refresrate changer, this would be very difficult, thank you! [/QUOTE]