In hololens Playback of mp4 audio stutters a lot

Hello,

I have Unity 2017.1.2p2 installed.
If I Play a mp4 Videoclip with a Videoplayer, the Audio stutters a lot.
I can only use a Audiosource, not Diret Mode, and I tried different Project Settings / Audio but I cannot Play my Video Clips with Audio in a good Quality. If I play them in VLC or in the HoloLens Gallery, the Audio is perfect.

It is for all mp4 Videos. The Resolution is not too high, I also recorded some with the hololens itsself and have the same Problem there.

Any help?

Thanks a lot!

 

Don´t know if it helps... i tested VideoPlayer on HoloLens quite a bit:
- Full HD mp4s: framerate Drops to 30 FPS or less. If you have more expensive stuff going on at the same time it Drops more. Audio will suffer now.
- normal HD is better and lower resolutions even more. Unless you try to do 360 Video and just Play on a plane or so the difference is hard to see, so go for the lower res.
- try to transcode your Video in unity. Sometimes this improves the Situation (although i really dont know why).

try not to use Spatial Sound and no Doppler!

And from 2012.1 release notes:
Audio: On Windows, AudioSource attached to VideoPlayer produces choppy sound when game iterations are overrunning. Will be fixed in future Unity release. (895458)

 

With higher Solutions it gets worse.
But even with lower resolutions the Sound is still bad.
I hope it will be better in a future release, thanks for the hint

 

We detached audio from our HoloLens video content, and run it separately to avoid pops/stutter.

 

No, it is a release build. Happens all the time.
I removed the Audio from the Video, and made a seperate mp3 from it, then Quality is very good.

But that is not a good solution, I have some Kind of assitant with a lot of mp4 Videos.
The Problem is for every single one. Hi resolutions are extremly bad, but for low resolutions it is also not as good as a seperated mp3.

 

I have the same problem. Detaching audio from video is not an option for me.

1. I had to transcode the video to 480p.
2. Like marjan pointed out, there is a bug in Unity 2017.1. Apperantly the AudioSource Component should not be on the same GameObject as the VideoPlayer. So I separated them and the audio quality is a lot better now.

Issue 895458:
https://issuetracker.unity3d.com/is...p4-files-with-videoplayer-created-from-script

Issue 899620:
https://issuetracker.unity3d.com/issues/win-stuttering-sound-of-mp4-files-video-lags

 

Thanks for the hint!
I already found out, too. But audio is stil not good then. Only a Little better.
I have 720p MP4 Videos and the Audio is not good, only when I seperate the Audio stream to an mp3 and Play that parallel it is very good. So it can not be a Performance Problem in my opinion...

 

I am having this issue and I am running the build via debugging-->start debugging in visual studio. Is there another way? This is the only way I have read to launch the app on HoloLens.

 

I got this working reasonably well, then out of nowhere the following exception and things don't work anymore,

UnityPlayer_UAP_x86_master_il2cpp.pdp not loaded

 

So I went back to old projects on which I have changed nothing. None of them work anymore. The Unity splash loads then the HoloLens crashes. Any ides?

 

Tried it on a second HoloLens and it worked. Went back to the first and it started working again. Bizarre. I was building all day and testing various settings on the first one. I wonder if I need to do a factory reset on the HoloLens or something?