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Media Framework 360 Video GearVR Black Screen Memory

Hi I have problem with playing 360 movies. Movie stops playing after several movies played. I have checked and smaller the movie is more times i can play it. So conclusion is that it has something to do with memory. This happens in 4.14 Realease, 4.15 Master and 4.14 Oculus Branches. Movies are started by blueprint to play after new level is opened.

 Binder_2            Info        33040.287463        message received msg=5, ext1=4096, ext2=2048
 Binder_2            Info        33040.288891        New video size 4096 x 2048
 Binder_2            Info        33040.288932        callback application
 Binder_2            Info        33040.289121        back from callback
 Binder_2            Info        33040.289347        message received msg=200, ext1=10972, ext2=0
 Binder_2            Warning     33040.291442        info/warning (10972, 0)
 Binder_2            Info        33040.291496        callback application
 Binder_2            Info        33040.291612        back from callback
 Binder_2            Info        33040.292327        message received msg=1, ext1=0, ext2=0
 Binder_2            Info        33040.293489        prepared
 Binder_2            Info        33040.293546        signal application thread
 OVR::VSync          Info        33040.293774        vsync_event update delayed by 6.0 milliseconds
 main                Info        33040.294817        setSubtitleAnchor in MediaPlayer
 Binder_2            Info        33040.293592        callback application
 Binder_2            Info        33040.293837        back from callback
 Thread-1034         Info        33040.293612        prepare complete - status=0
 Thread-1034         Info        33040.293675        setSubtitleAnchor in MediaPlayer
 Thread-1034         Info        33040.298921        invoke 68
 main                Info        33040.300782        invoke 68
 OVR::TimeWarp       Info        33040.306511        setSchedFifoStatic tid:20337 pto:0
 Thread-1034         Info        33040.308409        invoke 68
 Thread-1034         Info        33040.309520        invoke 68
 Thread-1034         Info        33040.310187        getVideoWidth
 Thread-1034         Info        33040.310221        getVideoWidth: 4096
 Thread-1034         Info        33040.310244        getVideoHeight
 Thread-1034         Info        33040.310265        getVideoHeight: 2048
 Thread-1034         Info        33040.310361        invoke 68
 Thread-1034         Info        33040.311585        invoke 68
 Thread-1034         Info        33040.314138        invoke 72
 OVR::TimeWarp       Info        33040.318073        VRManager set thread priority to 0
 OVR::TimeWarp       Info        33040.318148        SetSchedFifo( tid=20337, pri=0 ) succeeded
 OVR::TimeWarp       Info        33040.318354        setSchedFifoStatic tid:20440 pto:0
 Thread-1034         Info        33040.316111        invoke 68
 Thread-1034         Info        33040.317130        invoke 72
 Thread-1034         Info        33040.318672        setLooping: 0
 Thread-1034         Info        33040.318699        MediaPlayer::setLooping
 OVR::TimeWarp       Info        33040.326679        VRManager set thread priority to 0
 OVR::TimeWarp       Info        33040.326763        SetSchedFifo( tid=20440, pri=0 ) succeeded
 OVR::TimeWarp       Warning     33040.328214        VSync 1982429: eye=1,late=14.2ms,over=0.0ms,CPU=1.1ms,GPU>=0.2
 OVR::TimeWarp       Info        33040.355553        setSchedFifoStatic tid:20337 pto:1
 OVR::TimeWarp       Info        33040.361771        VRManager set thread priority to 1
 OVR::TimeWarp       Info        33040.361896        SetSchedFifo( tid=20337, pri=1 ) succeeded
 OVR::TimeWarp       Info        33040.362156        setSchedFifoStatic tid:20440 pto:1
 OVR::TimeWarp       Info        33040.368593        VRManager set thread priority to 1
 OVR::TimeWarp       Info        33040.368667        SetSchedFifo( tid=20440, pri=1 ) succeeded
 OVR::TimeWarp       Warning     33040.370956        VSync 1982432: eye=1,late=6.2ms,over=0.0ms,CPU=1.2ms,GPU>=0.9
 OVR::DeviceMngr     Info        33040.474193        DeviceManagerThread - event 52 (499Hz) (Tid=20369)
 OVR::Stats          Info        33040.841209        FPS=51,Prd=50ms,Tear=2,Early=49,Stale=10,VSnc=1,Lat=1,CPU2/GPU=2/3,1113/401MHz,OC=F,TA=C/C/C/C,SP=F/F/F/F,Mem=1017MHz,Free=1272MB,PSM=0,PLS=0,Temp=33.0C/32.0C
 OVR::DeviceMngr     Info        33116.682123        DeviceManagerThread - event 52 (499Hz) (Tid=20369)
 Thread-1034         Error       33116.826438        mmap(0,514403031) failed: Out of memory
 Thread-1034         Warning     33116.826479        create map from entry failed
 OVR::Stats          Info        33116.843370        FPS=60,Prd=51ms,Tear=0,Early=60,Stale=0,VSnc=1,Lat=1,CPU2/GPU=2/3,1113/401MHz,OC=F,TA=C/C/C/C,SP=F/F/F/F,Mem=1017MHz,Free=966MB,PSM=0,PLS=0,Temp=33.6C/32.5C
 OVR::DeviceMngr     Info        33117.684118        DeviceManagerThread - event 52 (499Hz) (Tid=20369)
 OVR::Stats          Info        33117.843339        FPS=60,Prd=51ms,Tear=0,Early=60,Stale=0,VSnc=1,Lat=1,CPU2/GPU=2/3,1113/401MHz,OC=F,TA=C/C/C/C,SP=F/F/F/F,Mem=1017MHz,Free=966MB,PSM=0,PLS=0,Temp=33.6C/32.5C
 Thread-1034         Error       33118.056945        mmap(0,514403031) failed: Out of memory
 Thread-1034         Warning     33118.056993        create map from entry failed
 OVR::DeviceMngr     Info        33118.687213        DeviceManagerThread - event 52 (498Hz) (Tid=20369)
 OVR::Stats          Info        33118.841293        FPS=60,Prd=52ms,Tear=0,Early=60,Stale=0,VSnc=1,Lat=1,CPU2/GPU=2/3,1113/401MHz,OC=F,TA=C/C/C/C,SP=F/F/F/F,Mem=1017MHz,Free=966MB,PSM=0,PLS=0,Temp=33.6C/33.0C
 Thread-1034         Error       33119.288094        mmap(0,514403031) failed: Out of memory
 Thread-1034         Warning     33119.288143        create map from entry failed
 OVR::DeviceMngr     Info        33119.689183        DeviceManagerThread - event 52 (499Hz) (Tid=20369)

Product Version: UE 4.14
more ▼

asked Dec 02 '16 at 10:34 AM in Packaging & Deployment

avatar image

51 1 2 2

avatar image aussieburger Dec 02 '16 at 02:08 PM

You could also try asking in this forum thread which previously had dev attention about the new android media player in 4.13+ https://forums.unrealengine.com/showthread.php?119261-4-13-How-does-the-new-media-player-work-in-4-13

avatar image Tim Hobson ♦♦ STAFF Dec 02 '16 at 04:29 PM

Hey Kwawrzyniak,

Do you have a sample video you could upload here or provide privately? Or even a link to a good test sample would work. I don't have any 360 video test content.

Also, does this only happen with the 360 video or any standard 2D movie as well?



avatar image kwawrzyniak Dec 02 '16 at 05:01 PM

Hey Tim, Thanks for replay. Please mail me and I will provide You all needed files. We use only 4k sphere movies. PiE or mobile preview works fine. It happens only on devices.

avatar image Chris Babcock STAFF Dec 02 '16 at 11:15 PM

This does look like an out of memory issue:

mmap(0,514403031) failed: Out of memory

Looks like it is trying to get approx 490MB mapped into process's address space and failing.

We are doing a Stop and Reset on the media player before playing a new video on same FAndroidMediaPlayer, and on destroy we close it and do a Release which should be freeing any resources.

You can monitor the memory usage using "adb shell cat /proc/meminfo" and for the process by first finding the process id with "adb ps" (look for your package name and the first number is the PID. Do an "adb shell cat /proc/PID/status)".

avatar image kwawrzyniak Dec 04 '16 at 04:49 PM

Hi You are right. I use Close blueprint on media player variable at every time i need to skip movie or go to pausemenu. According to this:

 void FAndroidMediaPlayer::Close()
     if (State == EMediaState::Closed)
     if (JavaMediaPlayer.IsValid())
     MediaUrl = FString();
     State = EMediaState::Closed;
     // notify listeners

It should stop and reset media player. I have put memory log inside txt files attached but app process don't exceed 287 Mb mem so far.

memory_stats.txt (42.9 kB)
avatar image Ale_32 Dec 21 '16 at 02:00 PM

Any news on this? I have a similar issue.

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