Rogero54 0 Posted September 24, 2020 Share Posted September 24, 2020 When watching recorded TV, after fast forwarding (skipping commercials for example), The audio channel is out of sync with the video. The video is ahead of the audio by a second. Rewinding the show fixes the issue. Server is a QNAP NAS TVS-673 with 16G of RAM. Clients are Nvidia Shield's. It occurred at 12:56, which should be at the end of the attached log. According to my wife it is an intermittent issue. Thanks, Roger embyserver (2).txt Link to comment Share on other sites More sharing options...
ebr 14912 Posted September 25, 2020 Share Posted September 25, 2020 Hi. Was there also an ffmpeg log? Link to comment Share on other sites More sharing options...
Rogero54 0 Posted September 25, 2020 Author Share Posted September 25, 2020 As I was reading this, my wife was watching some Hallmark movie and it was happening again. Attached is the related ffmpeg log. and the EmbyServer.txt incase you need both. The sync issue occurred at 10:19 embyserver (3).txt ffmpeg-directstream-e2512748-c1f8-4fe5-b05c-bf4373154735_1.txt Link to comment Share on other sites More sharing options...
Luke 37062 Posted October 3, 2020 Share Posted October 3, 2020 Hi @Rogero54 are you still running into this? Link to comment Share on other sites More sharing options...
Rogero54 0 Posted October 3, 2020 Author Share Posted October 3, 2020 yes, still occurring. Link to comment Share on other sites More sharing options...
Luke 37062 Posted October 8, 2020 Share Posted October 8, 2020 @Rogero54 are you still running into this with Emby Server 4.5.2? Link to comment Share on other sites More sharing options...
Rogero54 0 Posted October 20, 2020 Author Share Posted October 20, 2020 Sorry for the slow reply. Yes it is still occurring. Link to comment Share on other sites More sharing options...
bungee91 98 Posted October 22, 2020 Share Posted October 22, 2020 I have this same issue and it's been driving me insane. Been like this for months now. I rolled back the ATV app from beta to stable thinking it was changes to Exo, and it made no difference. I have two Shields but it only happens on the older 2015 model that has surround sound (HDMI to receiver, 5.1 setup), and not on the 2017 model that is direct to TV and downmix to stereo. I didn't test the 2017 with a 5.1 setup, but they're basically the same hardware wise. I even did a factory reset on it to rule it out, and zero difference. Here's the thing, it's unfortunately not just Live Tv, I've noticed it on other content as well but certainly less frequent. It seems more obvious on DD 5.1 content audio output, I don't believe it happens with Tv streams that are 2 channel. You can even see it at times (if it's the same issue), video will literally pause on resume of play, audio will resume as normal and be off. Skipping back seems to resync it. I think this is very much related to the Shield and not the server, but that's just a guess at this point. I've just been living with it even though it happens for me on a daily basis on this particular setup. Link to comment Share on other sites More sharing options...
pwhodges 1529 Posted October 22, 2020 Share Posted October 22, 2020 I see this often, most seriously when playing recorded TV using a Roku, but also sometimes with other content; after jumping back or forth in a video, there is a good chance that audio and/or subs will be out of sync, not necessarily by the same amount. Once this happens, the state is cached, and only playing from the start will fix it. I've not yet had time to sort out relevant logs (I've been away for a bit and am still catching up with stuff). Using current beta server. Paul Link to comment Share on other sites More sharing options...
bungee91 98 Posted October 24, 2020 Share Posted October 24, 2020 @ebr @Luke while I'm not the O.P. I'm fairly certain my issue is the same, and intend to get this resolved by providing as many examples as needed to pinpoint this issue. This issue is not new, it has been occurring for months. Wish I could pinpoint it, but it doesn't seem to be EXO from my previous attempts of rolling back to stable (weeks prior), and the issue being the same. Around 16:09 or 16:10 in this log the issue occurred. What occurred: I skipped forward in the recording. Once it started again both audio and video started, a moment after then the video froze but the audio kept going. Audio was out of sync until I skipped back, then it was in sync again. This issue seems to happen during an in progress recording, and a direct stream is being processed. I sent an in app log as well, ~4:10CST user Home. I am not 100% certain the video always pauses and then out of sync, but I can say that does occur often enough to be noticeable. embyserver (1).txt ffmpeg-remux-668cea34-118b-4cea-b412-4ce6281f5ef1_1.txt Link to comment Share on other sites More sharing options...
bungee91 98 Posted October 24, 2020 Share Posted October 24, 2020 One more example, same in-progress recording with the same issue occurring. 16:37, end of this remux log is when this occurred. I skipped forward, audio and video started for a second, then video froze for a second or two, then continued playback out of sync. Another app log sent as well at 16:37 CST. I do NOT notice this issue when it is a completed recording and direct play. ffmpeg-remux-b0ad3455-ac8c-4a13-83c1-7d4f8ce8611e_1.txt Link to comment Share on other sites More sharing options...
ebr 14912 Posted October 25, 2020 Share Posted October 25, 2020 It is always an in-progress recording this happens with? Link to comment Share on other sites More sharing options...
bungee91 98 Posted October 25, 2020 Share Posted October 25, 2020 2 hours ago, ebr said: It is always an in-progress recording this happens with? I'm fairly certain that's the case, as it's direct play when not in progress. I can say for certain it's much more frequent/noticeable/easy to make happen with an in-progress one. It may be more widespread than this though, I'll need to confirm. In the recent past I also was able to have sync issues with both an X264 DTS movie in my library as well as one with DD. I couldn't recreate that issue quickly though, so no assumptions here that's still the case. Link to comment Share on other sites More sharing options...
bungee91 98 Posted October 26, 2020 Share Posted October 26, 2020 @ebr anything I can perform or test to help in diagnosing/resolving this issue? The primary telltale sign for me is the freezing of video and audio continuing as expected. Do you need to know if this happens on a full transcode (I can force that), or if enabling an in-app option (video stream copy, refresh rate switching, ....) makes a difference? I have a test stable Windows Emby server if its version of FFMPEG is different and worth testing against. I wouldn't think this issue is very widespread given the lack of posts reporting it. Admittedly I had looked weeks back but assumed it was something with my setup. I even tested moving the Shield within 3' of my receiver to limit HDMI cable length. Suffice to say it made zero difference. I'm near certain forcing it to downmix to stereo would remove this issue as well, however didn't test that theory. Thank you for your help. Link to comment Share on other sites More sharing options...
Rogero54 0 Posted October 27, 2020 Author Share Posted October 27, 2020 On 10/25/2020 at 6:17 AM, ebr said: It is always an in-progress recording this happens with? Not in my case. Always existing recordings. Link to comment Share on other sites More sharing options...
ebr 14912 Posted October 27, 2020 Share Posted October 27, 2020 23 hours ago, bungee91 said: I'm near certain forcing it to downmix to stereo would remove this issue as well, however didn't test that theory. Can you test that theory? Thanks. Link to comment Share on other sites More sharing options...
mchallis 9 Posted October 29, 2020 Share Posted October 29, 2020 I have this audio out of sync too, playing back recorded tv, roku ultra 2020 embyserver (3).txt ffmpeg-directstream-54a4176b-aa8b-4e46-8609-7f1fb08080c2_1.txt Link to comment Share on other sites More sharing options...
mchallis 9 Posted October 30, 2020 Share Posted October 30, 2020 nevermind, a roku software update seems to have corrected it Link to comment Share on other sites More sharing options...
Luke 37062 Posted October 30, 2020 Share Posted October 30, 2020 That's interesting, thanks for the feedback ! Link to comment Share on other sites More sharing options...
bungee91 98 Posted November 2, 2020 Share Posted November 2, 2020 On 10/27/2020 at 8:34 AM, ebr said: Can you test that theory? Thanks. I was very incorrect, same exact issue with, or without pass-through. Also, it goes out of sync at times without the video visibly freezing and the audio continuing. This ONLY occurs when skipping forward, if playing consistently it isn't an issue. Since my issue is unique from the OP, should I create a new thread? Link to comment Share on other sites More sharing options...
bungee91 98 Posted November 2, 2020 Share Posted November 2, 2020 I'm going to do some testing with the Shield hooked directly into the Tv, and using ARC to the receiver. I've been living with the absolutely obnoxious issue of an audio lag after play/pause condition that is apparently "as designed" by Nvidia with DD signals. Apparently they don't have the license for the DD decoding, and do not implement comfort noise on the output with pass-through and default back to PCM, which introduces the lag to occur. Using the Shield to Tv with ARC seems to remove this issue for me (amazing!), however severely limits the direct play audio formats in this configuration. However if it removes the lag issue from play/pause condition, AND fixes this issue, I no longer give a f*** due to it just working. We shall see, will report back. Link to comment Share on other sites More sharing options...
Luke 37062 Posted November 4, 2020 Share Posted November 4, 2020 Let us know how you get on. Thanks. Link to comment Share on other sites More sharing options...
Rogero54 0 Posted December 16, 2020 Author Share Posted December 16, 2020 Any updates on this issue? Still seeing it daily while watching recorded TV. Link to comment Share on other sites More sharing options...
Luke 37062 Posted December 30, 2020 Share Posted December 30, 2020 Are you still having an issue with this? Link to comment Share on other sites More sharing options...
Rogero54 0 Posted December 30, 2020 Author Share Posted December 30, 2020 Yes. Link to comment Share on other sites More sharing options...
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