24p and audio sync issues - Printable Version

24p and audio sync issues - Printable Version

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- OffCentre - 2011-09-16 11:16

I'm also having this issue. I've got an Asrock ION3D running Windows 7 (32 bit), HDMI out to a Pioneer VSX-1020 AVR and a Panasonic GT30 Plasma. The only way I can get good a/v sync on all video files is to disable the auto adjust refresh rate/sync playback to display and run everything at 60hz. I don't really notice the 3:2 pulldown issue much but it seems a shame to have to turn off a feature which is supposed to make the viewing experience better, when in reality it makes it worse.. Sad

This is my first post here and I'd like to say I think XBMC is great, I've been searching for the best media player software for my Asrock and XBMC beats everything else I've tried hands down! I find it surprising though that this thread has been going on for a year now and there still doesn't seem to be a resolution for this issue...?

- PatrickBateman - 2011-09-16 12:47

I too have this problem. I have a pioneer VSX-921-K and when displaying content that is not 60hz (50/24/23) I experience a 0.100/0.200 delay in audio sync.

Is there a way to advise xbmc to add a delay automatically to 24fps etc content and leave 60hz content at 0.00?

This could be added in the advanced settings and would mean I don't have to change the delay manually on every file.

I could set all 23/24hz content to 0.0150ms delay and 50hz content to 0.200ms delay and 60hz content to 0.00ms delay.

Is this possible as it would help, if not do the devs know if this is being looked into for the new release to come.

I use the exact same set up as "off enter"
Win 7
NVIDIA ION
Pioneer VSX-921-K
Connected via HDMI
Connect to a 47" LED/LCD HDMI TV

It's not a show stopper, but it's annoying to say the least that the only refresh rate to not omit a/v sync issues is 60hz... Which is a refresh rate of which none of my blurays are encoded at

- robl45 - 2011-09-16 13:17

wow, I notice definate issues when running 24fps material at 60fps. 25fps at 60 is bad enough since my tv doesn't run other modes that will work for that, but 24fps at 60 was horrible, i can barely watch a movie like that.

and you can't just put in a delay as at least with me it works perfect with anything but xvid/divx 24fps material.

- steelman1991 - 2011-09-16 14:17

PatrickBateman Wrote:I too have this problem. I have a pioneer VSX-921-K and when displaying content that is not 60hz (50/24/23) I experience a 0.100/0.200 delay in audio sync.

Is there a way to advise xbmc to add a delay automatically to 24fps etc content and leave 60hz content at 0.00?

This could be added in the advanced settings and would mean I don't have to change the delay manually on every file.

I could set all 23/24hz content to 0.0150ms delay and 50hz content to 0.200ms delay and 60hz content to 0.00ms delay.

Is this possible as it would help, if not do the devs know if this is being looked into for the new release to come.

I use the exact same set up as "off enter"
Win 7
NVIDIA ION
Pioneer VSX-921-K
Connected via HDMI
Connect to a 47" LED/LCD HDMI TV

It's not a show stopper, but it's annoying to say the least that the only refresh rate to not omit a/v sync issues is 60hz... Which is a refresh rate of which none of my blurays are encoded at

Wondered how long it would take to see you in this thread Patrick Big Grin

FYI I think the devs are placing their faith in the introduction of the Audio Engine branch - and given my testing on the branch, it would seem well-founded, well for me at least. All audio synch issues I had are remedied on the AE build I'm using. I'm unsure how long until the AE branch hits master, but there are builds avaiable - you know where to look and who's threads to look for - 'the cheerleader' (kudos to clubwerk on the suggestions thread Rofl

) will no doubt be along shortly offering his pearls of wisdom Laugh

- robl45 - 2011-09-17 00:35

steelman1991 Wrote:Wondered how long it would take to see you in this thread Patrick

FYI I think the devs are placing their faith in the introduction of the Audio Engine branch - and given my testing on the branch, it would seem well-founded, well for me at least. All audio synch issues I had are remedied on the AE build I'm using. I'm unsure how long until the AE branch hits master, but there are builds avaiable - you know where to look and who's threads to look for - 'the cheerleader' (kudos to clubwerk on the suggestions thread ) will no doubt be along shortly offering his pearls of wisdom

actually I don't know where to look, I tried searching but coming up empty, would really like to have a fix for this problem if someone could point me to the place with the build.

- steelman1991 - 2011-09-17 00:55

The reason for the cryptic clue is that the build is neither official nor supported at this time. The dev on the AE Branch has deliberately chosen not to offer binary builds, because of its developemental nature. However there are users who have sourced builds and are offering them openly. Search my friend is your friend. You certainly couldn't have searched very far - try bitstream

- robl45 - 2011-09-17 03:20

I found the new version, running it now. Audio is alittle better but still not perfect. Xvids are missing frames like crazy where a h264 misses like 3 frames. I would say that seems to be the problem

- robl45 - 2011-09-17 05:13

Nothing in aac will play on new version, only dolby digital. Any ideas on that? Playing just fine now on old one. Plus side is xvid seemed to work decently. Minus is I have to switch between versions.

- clubwerks - 2011-09-17 05:56

robl45 Wrote:Nothing in aac will play on new version, only dolby digital. Any ideas on that? Playing just fine now on old one. Plus side is xvid seemed to work decently. Minus is I have to switch between versions.

Not sure if we're using the same or similar versions, but I'm using the version that will bitstream DTS-HD MA and TrueHD. You might try checking the volume slider in the menu while the aac video is playing. I had a similar problem. The slider comes set to 0.0 db. It cannot be adjusted with the keyboard either, only the mouse. Sliding it all the way to the right to 1.0db fixed the problem for me. When I first installed it, I got no sound from any format below Dolby Digital.

- robl45 - 2011-09-17 05:59

Thanks, I actually figured it out a little after posting. You can use the volume keys on xbmc android remote, at least that is how I did it