[Ozyman]

Question: why would I choose to use the FPS setting for audio delay tweaking, versus just the audio codec being used? I'm not clear under what scenarios I might choose to toggle that on or not. Thanks!

[scott967]

just came across this; seems very nice.  As a possible enhancement could setting "audiooutput.audiodevice" be monitored?  My use case is windows and think it might help to have different syncs for DIRECTSOUND:speakers/WASAPI:speakers/DIRECTSOUND:bt headset/WASAPI:bt headset.

Haven't experimented, but what happens if you use sync playback to display and player tempo up/down?

scott s.
.

[matthane]

Question: why would I choose to use the FPS setting for audio delay tweaking, versus just the audio codec being used? I'm not clear under what scenarios I might choose to toggle that on or not. Thanks!

In some cases it seems like the FPS of the specific video can affect the processing time on the TV, and need different latency settings. That's all, if you don't notice that, then you don't need to worry about using it. I just added it to be more thorough in case people had specific issues watching something at 24fps vs 60fps, or such cases and needed different settings for each FPS type.

[matthane]

just came across this; seems very nice.  As a possible enhancement could setting "audiooutput.audiodevice" be monitored?  My use case is windows and think it might help to have different syncs for DIRECTSOUNDpeakers/WASAPIpeakers/DIRECTSOUND:bt headset/WASAPI:bt headset.

Haven't experimented, but what happens if you use sync playback to display and player tempo up/down?

scott s.
.

Hi Scott, thanks! I can look into something like that. I'm actually just learning about how Kodi works so I don't know all the ins and outs. However, I would guess that on a Windows based system it might be better to apply the specific latency of your output devices etc at the Windows level, instead of trying to also add that into the addon. The settings.xml file is already HUGE haha so I'm weary of adding more configurations. But I appreciate your feedback, I will continue to investigate and see whats possible.

[Ozyman]

Hey Matthane, 

Been watching the CoreElec audio sync issues thread you shared, just updated to latest nightly (11/29), and hoping it helps! That said, reason I'm writing is I'm trying to diagnose why setting audio sync using your tool doesn't seem to update Kodi's audio sync setting, and vice versa (and I have turned on that setting in AOM for DV, HDR, and SDR - even though my projector doesn't do DV). I've been setting the offset either manually using Kodi's audio offset slider, or using your tool when trying to play Back to the Future.  For some reason setting it in one doesn't "stick" so I go to the other and see the value is different - this is for the first DTS True HD 7.1 track. I'm only setting by audio codec, not FPS. Any ideas on what I might be doing wrong, or whether there's a bug somewhere after all of these changes to CoreElec?

[matthane]

Hey Matthane, 

Been watching the CoreElec audio sync issues thread you shared, just updated to latest nightly (11/29), and hoping it helps! That said, reason I'm writing is I'm trying to diagnose why setting audio sync using your tool doesn't seem to update Kodi's audio sync setting, and vice versa (and I have turned on that setting in AOM for DV, HDR, and SDR - even though my projector doesn't do DV). I've been setting the offset either manually using Kodi's audio offset slider, or using your tool when trying to play Back to the Future.  For some reason setting it in one doesn't "stick" so I go to the other and see the value is different - this is for the first DTS True HD 7.1 track. I'm only setting by audio codec, not FPS. Any ideas on what I might be doing wrong, or whether there's a bug somewhere after all of these changes to CoreElec?

Hmm, make sure you enable "Active offset monitoring" in the "Playback Behavior" settings tab of the addon. That is the setting responsible for making sure that the audio slider in the GUI during playback matches the settings. If it's disabled (which it is by default), it won't be in sync and will only apply your settings from the addon on start of the video, and won't save any changes you make to it during playback. I have this feature disabled by default because it technically requires constant polling during playback. While I don't notice any performance issues, I want to be sensitive to all hardware setups people have and don't want to poll the processor unnecessarily.

Let me know if that solves your issue!

Edit: I should also point out that the HDR types in the addon menu are the source HDR types, not the TV's output mode. Meaning, if Kodi reads the file as a Dolby Vision file, the addon settings will be stored in the Dolby Vision category even if your display is outputting it without the DV metadata and only HDR10 base layer.

[Ozyman]

Hey Matthane, 

Been watching the CoreElec audio sync issues thread you shared, just updated to latest nightly (11/29), and hoping it helps! That said, reason I'm writing is I'm trying to diagnose why setting audio sync using your tool doesn't seem to update Kodi's audio sync setting, and vice versa (and I have turned on that setting in AOM for DV, HDR, and SDR - even though my projector doesn't do DV). I've been setting the offset either manually using Kodi's audio offset slider, or using your tool when trying to play Back to the Future.  For some reason setting it in one doesn't "stick" so I go to the other and see the value is different - this is for the first DTS True HD 7.1 track. I'm only setting by audio codec, not FPS. Any ideas on what I might be doing wrong, or whether there's a bug somewhere after all of these changes to CoreElec?

Hmm, make sure you enable "Active offset monitoring" in the "Playback Behavior" settings tab of the addon. That is the setting responsible for making sure that the audio slider in the GUI during playback matches the settings. If it's disabled (which it is by default), it won't be in sync and will only apply your settings from the addon on start of the video, and won't save any changes you make to it during playback. I have this feature disabled by default because it technically requires constant polling during playback. While I don't notice any performance issues, I want to be sensitive to all hardware setups people have and don't want to poll the processor unnecessarily.

Let me know if that solves your issue!

Edit: I should also point out that the HDR types in the addon menu are the source HDR types, not the TV's output mode. Meaning, if Kodi reads the file as a Dolby Vision file, the addon settings will be stored in the Dolby Vision category even if your display is outputting it without the DV metadata and only HDR10 base layer.

Yep, definitely have "Active offset monitoring" on - so that's not the issue. However, your second point might be: I do have some dual DV/HDR videos, and for a while at least I didn't turn on the DV HDR type in the settings because I figured it was irrelevant. I'll test some more with that on and see if I have issues - if I see problems, I'll try to get more specific details to share. Thanks!

[matthane]

I realize it is a bit confusing at first having the settings sorted by source type instead of TV output mode, but it's far easier in Kodi to query the source type rather than trying to sniff out what the TV is actually doing. I've built in pretty verbose logging so if it comes to that, you can enable debug level logging in Kodi and then there will be log entries prefixed with "AOM_" that will help us see what's going on behind the scenes.

[Ozyman]

I realize it is a bit confusing at first having the settings sorted by source type instead of TV output mode, but it's far easier in Kodi to query the source type rather than trying to sniff out what the TV is actually doing. I've built in pretty verbose logging so if it comes to that, you can enable debug level logging in Kodi and then there will be log entries prefixed with "AOM_" that will help us see what's going on behind the scenes.

No, I think your decision makes sense here - it’s probably just an opportunity for some better tooltips or guidance on when to choose something. So far the only areas that have thrown me off were:

1. The difference between setting delay for audio codec vs FPS, and which to use (and why)
2. Whether the DV setting is important for those of us with only HDR display devices (like my JVC projector)

There were several other display modes offered which I’ve left off since I don’t *think* I use them (projector focuses on SDR and HDR), but those might benefit from a bit more information on what they are and when someone might want to use them.

My dream would be that you could either bundle or link to a small set of audio sync videos and run user through a quick set of tests (that’s appropriate to their set up, with option to override in case detection algorithym is wrong), tell them what to look for, and set a nice baseline calibration to tweak from. But I know that’s a lot of effort, and I’m not sure whether the videos are available for free use. I did see a set of Dolby Digital test videos offered from Dolby on their website, so that might be a start. Certainly *not* suggesting ripping professional calibration assets or anything!