Develop Reference

Exoplayer Dolby playback issues with dynamic ad insertion

Im playing a DAI supported DASH stream with Exoplayer 2.18.1 (on firetv 4k) where the multi-period manifest gets stitched with the ad period. The ad period sometimes have dolby (stereo or 5.1) audio tracks and when the playback switches to ad from live we see some video freezes and then complete playback freeze at the end of the ad. The adb logcat at this time show following spurious audio timestamp related logs:
09-21 17:34:57.312 19192 23498 W AudioTrack: Spurious audio timestamp (frame position mismatch): 28270119, 10923744015, 10923743917, 189528000, 9827328, 9827328
09-21 17:34:57.816 19192 23498 W AudioTrack: Spurious audio timestamp (frame position mismatch): 28294325, 10924248296, 10924248198, 189528000, 9827328, 9827328
09-21 17:34:58.211 19192 19231 V SessionStateManager: 2022-09-21 17:34:58,211 - Thread: [main] - player time 1663761496000ms program start time 1663759800000ms media session time 1696000ms
09-21 17:34:58.211 19192 19231 V SessionStateManager: 2022-09-21 17:34:58,211 - Thread: [main] - com.mobitv.client.connect.core.media.session.MobiMediaSession#34d0ee4 set media session playback state to PLAYING time 1696000ms
09-21 17:34:58.211 19192 19231 V SessionStateManager: 2022-09-21 17:34:58,211 - Thread: [main] - setting playback state PlaybackState {state=3, position=1696000, buffered position=0, speed=1.0, updated=10924643, actions=8963, error code=0, error message=null, custom actions=[], active item id=-1}
09-21 17:34:58.213 739 932 V Avrcp : MediaController playback changed: PlaybackState {state=3, position=1696000, buffered position=0, speed=1.0, updated=10924643, actions=8963, custom actions=[], active item id=-1, error=null}
09-21 17:34:58.322 19192 23498 W AudioTrack: Spurious audio timestamp (frame position mismatch): 28318587, 10924753767, 10924753671, 189528000, 9827328, 9827328
One interesting thing to note is that this exact ad plays well when played individually i.e like a DASH VoD asset but not when stitched with DASH live period.
Some more information from stitched manifest that might help. The live period contains 1 video and 1 audio track:
<Representation id="L_5000_W" codecs="avc1.64001f" bandwidth="5120000" width="1280" height="720" frameRate="60/2" sar="1:1">
<SegmentTemplate initialization="$RepresentationID$/init.mp4" media="$RepresentationID$/$Time$.m4s" timescale="90000" presentationTimeOffset="150764576748000">
...
</SegmentTemplate>
</Representation>
<Representation id="L_384_ENG" codecs="ac-3" bandwidth="384000" audioSamplingRate="48000">
<AudioChannelConfiguration schemeIdUri="tag:dolby.com,2014:dash:audio_channel_configuration:2011" value="F801"/>
<SegmentTemplate initialization="$RepresentationID$/init.mp4" media="$RepresentationID$/$Time$.m4s" timescale="48000" presentationTimeOffset="80407774265537">
...
</SegmentTemplate>
</Representation>
The ad period too contains 1 video and 1 audio track:
<Representation id="A_5000_W" codecs="avc1.4d4028" bandwidth="5120000" width="1920" height="1080" frameRate="60/2" sar="1:1">
<SegmentTemplate initialization="/prod-ad-1/$RepresentationID$/init.mp4" media="/prod-ad-1/$RepresentationID$/$Number$.m4s" timescale="90000" startNumber="1">
...
</SegmentTemplate>
</Representation>
<Representation id="A_384_ENG" codecs="ac-3" bandwidth="384000" audioSamplingRate="48000">
<AudioChannelConfiguration schemeIdUri="tag:dolby.com,2014:dash:audio_channel_configuration:2011" value="F801"/>
<SegmentTemplate initialization="/prod-ad-1/$RepresentationID$/init.mp4" media="/prod-ad-1/$RepresentationID$/$Number$.m4s" timescale="48000" startNumber="1">
...
</SegmentTemplate>
</Representation>
As of now Im struggling to understand the exact reasons for this playback problem. Can any please one help understanding this issue ?
Edit: FireTV stick 4K with Fire OS 6.2.9.3 (NS6293/4731)

MediaPlayer sometimes not preparing when screen is locked

I have a MusicService for MediaPlayback, wich uses a MediaPlayer with the settings:
player.setWakeMode(getApplicationContext(), PowerManager.PARTIAL_WAKE_LOCK);
player.setAudioStreamType(AudioManager.STREAM_MUSIC);
and those Listeners are set:
OnPreparedListener, OnCompletionListener, OnErrorListener, OnSeekCompleteListener
The MediaPlayer is used for mp3-Playback. When one Song is finished, onCompletion is called. Then PlayNext is called, wich resets the MediaPlayer, then sets the Datasource with the URI of the next Track. Uri is loaded with:
Uri trackUri = ContentUris
.withAppendedId(android.provider.MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, songId);
Then the Player is prepared, then the player is started. This is working fine, but only sometimes, when the Device is locked and played about 1-3 Songs while it was locked and the next Song should start, the Player doesn't prepare until i hit the power button. Figured out, that if I don't hit the PowerButton it takes the Player about 2 Minutes to prepare.
I've Logged everything now and made a few custom outputs with Log.e(...).
This is put out before prepare() (prepareAsync() delivers the same result) is called:
E/MusicService: Preparing now...
This is put out, when onPrepared is called:
E/MusicService: Player prepared.
So this is the full Device-Output after "Preparing now..." is put out:
04-02 13:54:55.506 12517-12517/at.htlleonding.musync E/MusicService: Preparing now.
04-02 13:54:55.525 811-888/? E/libsuspend: Error writing to /sys/power/state: Device or resource busy
04-02 13:54:55.544 246-14756/? D/offload_visualizer: thread exit
04-02 13:54:55.546 246-14754/? V/offload_effect_bundle: offload_effects_bundle_hal_stop_output output 1879 pcm_id 9
04-02 13:54:55.546 246-14754/? D/hardware_info: hw_info_append_hw_type : device_name = speaker
04-02 13:54:55.549 246-14752/? E/audio_hw_primary: offload_thread_loop: Compress handle is NULL
04-02 13:54:55.549 246-924/? D/audio_hw_primary: adev_close_output_stream: enter:stream_handle(0xb5bfa640)
04-02 13:54:55.549 246-924/? D/audio_hw_primary: out_standby: enter: stream (0xb5bfa640) usecase(3: compress-offload-playback)
04-02 13:54:55.555 246-924/? W/AudioFlinger: moveEffectChain_l() effect chain for session 0 not on source thread 0xb59fa000
04-02 13:54:55.611 246-15030/? I/FFmpegExtractor: android-source:0xb1834060
04-02 13:54:55.820 811-888/? E/libsuspend: Error writing to /sys/power/state: Device or resource busy
04-02 13:54:55.972 246-15030/? I/FFMPEG: [mp3 # 0xae2f4400] Skipping 0 bytes of junk at 2177007.
... Then theres no output until i hit the PowerButton. Then the Song is prepared.
If someone is interested in the full output after I hit the PowerButton until "Player prepared" is called, I created a Gist here.
Sidenote:
While the App is used, a few Album-Covers are displayed in some Fragments. They are loaded with Picasso, so I don't need to worry about memory caching. Some ImageViews are filled without Picasso (for example the ImageViews that hold the drawables of my PlayerControls). Maybe there are Problems with the memory/resources?

I might have found the answer in another thread where some faced the same problem while streaming music here.
My final solution is to use a WakeLock, wich I require before preparing a Song and release again onPrepared and onError and onDestroy of my Service. It's important to release it again to save Battery. Make sure to check if the WakeLock is held before releasing it.
I create my WakeLock like this in onCreate of my Service:
PowerManager pm = (PowerManager) getApplicationContext().getSystemService(Context.POWER_SERVICE);
wakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "MusicService");
aquire:
wakeLock.acquire();
release:
if(wakeLock.isHeld())
wakeLock.release();
Tested the Playback now for about 10 Minutes and didn't stop until now. I don't know if this is a very battery-saving solution

MediaPlayer mutes after some minutes of playing mp3

I'm developing an AudioBook player for Android. For the playing part, I've used MediaPlayer class which works perfectly for some minutes but then always suddenly fails and no voice could be heard.
Even if I stop and issue a new request (read new chapter) it doesn't work. However the passing of time seems natural (for example playing a 10 seconds clip takes 10 seconds to finish) but there is absolutely no voice!
Does someone have any clues what might cause this problem?
Here's the relevant parts of my MediaPlayer usage.
And here's the logcat around the place it mutes.
EDIT:
By analyzing the logcat, I found out that this part is showing after the muting has happened:
E/AudioFlinger( 146): no more track names available
E/AudioTrack( 146): AudioFlinger could not create track, status: -12
E/AudioSink( 146): Unable to create audio track
E/AwesomePlayer( 146): deleting Audio Player - start failed
E/MediaPlayer( 5558): error (-19, 0)
***V/MainActivity( 5558): onNewPage()
E/MediaPlayer( 5558): Error (-19,0)
E/Sensors ( 285): sensors_poll_context_t::pollEvents, line 202: receive event #### i=2, nb=0
E/Sensors ( 285): sensors_poll_context_t::pollEvents, line 202: receive event #### i=2, nb=0
E/Sensors ( 285): sensors_poll_context_t::pollEvents, line 202: receive event #### i=2, nb=0
E/Sensors ( 285): sensors_poll_context_t::pollEvents, line 202: receive event #### i=2, nb=0
***V/MediaPlayerWrapper( 5558): stop()
***D/MediaPlayerWrapper( 5558): Stopping player...
E/MediaPlayer( 5558): stop called in state 0
E/MediaPlayer( 5558): error (-38, 0)
The lines with three * at beginning are my messages, others are frameworks'.

The problem was simply because of not releasing the media player object; as these answers (a,b,c) suggested already.
mMediaPlayer.release();

Strange Behavior of Android VideoView - "Can't Play Video"

In my application,showing video from sdcard folder or new taken video from Video intent in a VideoView in different Activity by passing file path of the video selected.
Now the problem is,
I have tested this app in my 2 devices LG Optimus Black and LG Optimus Me and it works like charm not problem no force close.
Now when i test this app in Samsung Fascinate 2.1 the video view shows the message "Can't Play Video" no matter i select existing video or take new one.
Remember the app is working fine with the above 2 devices.
In the ShowVideo activity i have button to upload the video, when i got the message "Can't Play Video" i been able to take video from the same path and upload it and can check that video at server side but video view didn't played that video.
So, the Video Path of the SDCard is not the problem thats for sure.
also the Video are of .3gp or .mp4 format only so the format is also supported by android
.
My Questions Are :
1)When the message "Can't Play Video" occurs?
2)What are the Solution for that?
and 3) What could be possible mistakes in my application?
here is the logcat output while i got that message but don't see any error/exception in that.
I/ActivityManager( 2227): Starting activity: Intent { cmp=com.zoodigapp.zoodig/com.zoodigapp.media.ShowVideo (has extras) }
V/SettingsProvider( 2227): system <- value=1.0 name=font_scale
V/SettingsProvider( 2227): property: sys.settings_system_version=26
V/SettingsProvider( 2227): notifying: content://settings/system/font_scale
D/HardwareService( 2227): Brightness NATIVE setBacklightBrightness running. light: 2bightness ==> 30 mode: 1
D/NetworkLocationProvider( 2227): onDataConnectionStateChanged 6
D/MobileDataStateTracker( 2227): default Received state= CONNECTING, old= CONNECTING, reason= (unspecified), apnTypeList= *
D/AGPSManagerService( 2227): state: CONNECTING apnName: Verizon reason: null
D/dalvikvm( 3326): GC freed 2472 objects / 140504 bytes in 73ms
I/File ( 3326): /sdcard/DCIM/Camera/video-2011-10-17-10-40-54.mp4
V/MediaStore( 3326): We probably run out of space, so create the thumbnail in memory.
I/MediaPlayerService( 2182): Use PV_PLAYER for url:/sdcard/DCIM/Camera/video-2011-10-17-10-40-54.mp4
E/MetadataDriver( 2182): MetadataDriver::setDataSource url file type is isAudiofile(0)
D/ ( 2182): SISO TEST registering PVMFRecognizerPluginFactory
D/ ( 2182): SISO TEST registering PVMFRecognizerPluginFactory success
E/MetadataDriver( 2182): isCommandSuccessful: Command id(0 and expected 0) and status (-17 and expected 1), data corruption (false) at state (4).
E/MetadataDriver( 2182): isCommandSuccessful: Command id(1 and expected 1) and status (-14 and expected 1), data corruption (false) at state (5).
E/MetadataDriver( 2182): captureFrame : time = 0
E/MetadataDriver( 2182): captureFrame : inputWidth = 0, inputHeight =0, bAspectratio=0, bResize=0
D/MediaUploader( 2492): UploadsQueue.getAllPending: elapsed msec=449
I/MediaUploader( 2492): UploadManager.uploadPendingItems: Found 1 items in queue.
I/Selected( 3326): =============Second
D/MediaUploader( 2492): isGphotosSynced: FALSE -- starting gphotos update refresh for -5709461173740324808
W/IInputConnectionWrapper( 3505): showStatusIcon on inactive InputConnection
I/copybit ( 2227): [createPP] fimc version : 50
I/MediaPlayerService( 2182): Use PV_PLAYER for url:/DCIM/Camera/video-2011-10-17-10-40-54.mp4
D/ ( 2182): SISO TEST registering PVMFRecognizerPluginFactory
D/ ( 2182): SISO TEST registering PVMFRecognizerPluginFactory success
D/ ( 2182): SISO TEST PVOMA1FFRecognizerFactory::CreateRecognizerPlugin()
D/ ( 2182): SISO TEST PVOMA1FFRecognizerFactory::CreateRecognizerPlugin() plugin found
D/ ( 2182): SISO TEST PVOMA1FFRecognizerFactory::DestroyRecognizerPlugin()
E/OsclDirectFileIO( 2182): [LargeFileSupport] OsclDirectFileIO::OpenFileOrSharedFd Error = -1
W/MediaPlayer( 3326): info/warning (1, 26)
E/PlayerDriver( 2182): Command PLAYER_SET_DATA_SOURCE completed with an error or info -4
E/MediaPlayer( 3326): SISO TEST MEDIA_ERROR
E/MediaPlayer( 3326): error (-4, -4)
W/PlayerDriver( 2182): PVMFInfoErrorHandlingComplete
V/MediaProvider( 2349): stopThumbWorkerSuspendTimer
V/MediaProvider( 2349): Resuming ThumbWorker
W/MediaProvider( 2349): Have message but no request?
I/System.out( 2647): interface name: null
I/MediaPlayer( 3326): Info (1,26)
E/MediaPlayer( 3326): Error (-4,-4)
D/VideoView( 3326): Error: -4,-4
D/MediaUploader( 2492): UploadManager.uploadPendingItems: Waiting for GPhotos sync
D/MediaUploader( 2492): UploadsQueue.getAllPending: elapsed msec=5
I/MediaUploader( 2492): UploadManager.uploadPendingItems: Found 1 items in queue.
I/POWER_OFF_TEST( 2227): mBatteryLevel = 38 mBatteryDecimalPoint = 1
D/MediaUploader( 2492): UploadsAsyncQueryHandler.notifiyDatabaseChangeListeners
D/MediaUploader( 2492): isGphotosSynced: FALSE -- update is in progress for -5709461173740324808
D/MediaUploader( 2492): UploadManager.uploadPendingItems: Waiting for GPhotos sync
D/MediaUploader( 2492): updateQueueState: RUNNING
I/GooglePlusOne( 2492): Starting new CAMERA_SYNC_CREATED request 1
I/ActivityManager( 2227): Displayed activity com.zoodigapp.zoodig/com.zoodigapp.media.ShowVideo: 1251 ms (total 1251 ms)
V/InputDevice( 2227): ID[0]=0 Dn (0=>1)
V/WindowManager( 2227): Dsptch >Window{47a67278 com.zoodigapp.zoodig/com.zoodigapp.media.ShowVideo paused=false}
D/dalvikvm( 2227): GC freed 4009 objects / 210024 bytes in 155ms
V/InputDevice( 2227): ID[0]=0 Up (1=>0)
V/WindowManager( 2227): Dsptch >Window{47a67278 com.zoodigapp.zoodig/com.zoodigapp.media.ShowVideo paused=false}
W/InputManagerService( 2227): Window already focused, ignoring focus gain of: com.android.internal.view.IInputMethodClient$Stub$Proxy#47d89250
D/dalvikvm( 2492): GC freed 11952 objects / 682568 bytes in 171ms
D/dalvikvm( 2647): GC freed 7435 objects / 656456 bytes in 26ms
D/dalvikvm( 2647): GC freed 3079 objects / 498304 bytes in 60ms
I/System.out( 2647): interface name: null
I/GooglePlusOne( 2492): CAMERA_SYNC_CREATED request 1 completed with code=200
D/MediaUploader( 2492): onGphotosChange: sawError=false; errs=0; retry=Wed Dec 31 17:00:00 America/Boise 1969; expiry=Mon Oct 17 10:56:20 America/Boise 2011
D/MediaUploader( 2492): UploadsQueue.getAllPending: elapsed msec=17
I/MediaUploader( 2492): UploadManager.uploadPendingItems: Found 1 items in queue.
D/MediaUploader( 2492): isGphotosSynced: TRUE for -5709461173740324808
D/MediaUploader( 2492): existsInGphotos: false info=name=video-2011-10-17-10-40-54.mp4 fileUri=content://media/external/video/media/37 fileSize=2477915;
D/MediaUploader( 2492): UploadManager.uploadPendingItems: starting upload...
D/MediaUploader( 2492): UploadManager.upload: info=name=video-2011-10-17-10-40-54.mp4 fileUri=content://media/external/video/media/37 fileSize=2477915
I/NetworkStat( 2678): Network type: MOBILE
I/NetworkStat( 2678): -------- mobile data network is NOT available as of now
D/NotificationService( 2227): enqueueNotification :: notification.defaults = 0, Notification.DEFAULT_SOUND = 1, notification.sound = null
D/dalvikvm( 2492): GC freed 4032 objects / 238248 bytes in 49ms
I/dalvikvm-heap( 2492): Grow heap (frag case) to 6.708MB for 524304-byte allocation
D/dalvikvm( 2492): GC freed 291 objects / 13392 bytes in 58ms
D/MediaUploader( 2492): UploadsAsyncQueryHandler.notifiyDatabaseChangeListeners
D/MediaUploader( 2492): GlsAuthorizer.getAuthToken: authTokenType=lh2; account=dprichards#gmail.com;
D/MediaUploader( 2492): executeWithAuthRetry: starting httpClient.execute #1
D/dalvikvm( 2870): GC freed 555 objects / 24144 bytes in 269ms
I/System.out( 2492): interface name: null
V/InputDevice( 2227): ID[0]=0 Dn (0=>1)
V/WindowManager( 2227): Dsptch >Window{47cf6308 com.zoodigapp.zoodig/com.zoodigapp.media.ShowVideo paused=false}
V/InputDevice( 2227): ID[0]=0 Up (1=>0)
V/WindowManager( 2227): Dsptch >Window{47cf6308 com.zoodigapp.zoodig/com.zoodigapp.media.ShowVideo paused=false}
D/dalvikvm( 2647): GC freed 7301 objects / 659064 bytes in 78ms
I/System.out( 2647): interface name: null
I/System.out( 2647): interface name: null
I/System.out( 2647): interface name: null
D/dalvikvm( 2647): GC freed 2654 objects / 324016 bytes in 149ms
I/System.out( 2647): interface name: null
D/MediaUploader( 2492): getStatusCode: status=HTTP/1.1 200 OK
D/MediaUploader( 2492): getStatusCode: status=HTTP/1.1 200 OK
D/MediaUploader( 2492): UPLOAD_START: uploadUrl=https://picasaweb.google.com/data/upload/resumable/media/create-session/feed/api/user/default/albumid/camera-sync?xmlerrors=1&upload_id=AEnB2Uqe2bdvyx5p31Ta-sS4ytggj07_6-uiKG_hCOc6sT1u8eqhvr-8oZdUT1uPHxuAxXphUiJXyq-i_8YaJlT2YLholp__Sw
D/MediaUploader( 2492): UploadManager.onProgress
V/MediaUploader( 2492): UploadManager.progressUpdate: guid=1351689615505998240; bytes=0
D/dalvikvm( 2647): GC freed 920 objects / 202544 bytes in 53ms
D/dalvikvm( 2492): GC freed 7362 objects / 498448 bytes in 73ms
D/MediaUploader( 2492): UploadsAsyncQueryHandler.notifiyDatabaseChangeListeners
D/dalvikvm( 2492): GC freed 658 objects / 129232 bytes in 42ms
I/dalvikvm-heap( 2492): Grow heap (frag case) to 7.250MB for 262160-byte allocation
D/dalvikvm( 2492): GC freed 0 objects / 0 bytes in 41ms
D/dalvikvm( 2492): GC freed 92 objects / 135128 bytes in 30ms
I/dalvikvm-heap( 2492): Grow heap (frag case) to 7.621MB for 524304-byte allocation
D/dalvikvm( 2492): GC freed 0 objects / 0 bytes in 44ms
D/MediaUploader( 2492): executeWithAuthRetry: starting httpClient.execute #1
D/dalvikvm( 2647): GC freed 576 objects / 53240 bytes in 182ms
V/InputDevice( 2227): ID[0]=0 Dn (0=>1)
V/WindowManager( 2227): Dsptch >Window{47cf6308 com.zoodigapp.zoodig/com.zoodigapp.media.ShowVideo paused=false}
V/InputDevice( 2227): ID[0]=0 Up (1=>0)
V/WindowManager( 2227): Dsptch >Window{47cf6308 com.zoodigapp.zoodig/com.zoodigapp.media.ShowVideo paused=false}
I/ActivityManager( 2227): Starting activity: Intent { cmp=com.zoodigapp.zoodig/.WriteMessage (has extras) }
If you find anything not described well please comment below.
Additional details (moved from comments):
They are merely of 1 minutes and the last one I tested and failed on Samsung that was of only 20 seconds. and sizes are mostly in MB not more than 20 MB right now.
The video is taken from the same device and immediately after taking that video I try to show in my activity same way other already stored video are also fine...actually after uploading that video I can see that video and can download also

1)When the message "Can't Play Video" occurs?
Android usually gives out this message, when it is not able to play the media content. The reasons for this to happen can be anything like
Unsupported file format
Unsupported codecs
Erroneous content
to mention a few.
2)What are the Solution for that?
Unless you have your own Media Framework in your app, there is no solution from the application level
3) What could be possible mistakes in my application?
Very unlikely the mistake is in your application. If you read the logs, you will see that the error seems to originate from the DataSource of opencore (Which version of android are you running anyway? It is still using Opencore instead of StageFright). It is recognizing it as a large file (> 2GB) and hence giving out the error "E/OsclDirectFileIO( 2182): [LargeFileSupport] OsclDirectFileIO::OpenFileOrSharedFd Error = -1"
The other thing to note is certain phones have better multimedia capability than the other phones, since OEM's can themselves improve the multimedia capability. So there is no written guarantee that all files can be played on all devices, even though it conforms to the supported formats, codecs mentioned by Android.

Its all about format problem, Some phone record the video in mp4 format and some in 3gp format, but in almost all phones the default mediaplayer support 3gp format. So the solution is you need to convert it into 3gp at the time of playing. This thing is difficult to handle in android, So at server end you can do it easily and hence whatever the format of the video is being uploaded you can download it in one format .3gp and it will work fine.

Make sure that your video is in MP4 format , but if still does not play or shows same error then fault is not with the code. Fault is in the video resolution. just check height and width of you video and match it with you video view component. There are lot of free video compressors Online available. So just compress your video and test it.
It will work.
Cheers!!!

I kept getting the same "Can't Play Video" message while trying to play video from the phone itself. First I didn't input good path to a file but there was anther interesting issue.
I've type path from the root, example /videoFileName.mp4 and I should have type it with sdcard in between like /sdcard/videoFileName.mp4
My Sony Ercisson Xperia Arc was connected as a usb mass device storage at the same time I was running my app through adb, so internal sd card was unmounted and file could not be found. I've discovered this when I tryed same code on Samsung Galaxy S which behaves differently when connected.

If you have mp4 file having H.264 baseline encoding and still you are unable to play video in your android device then it might be problem in .htAccess file on server side. It might be zipping .mp4 file. few devices are able to play video by unzipping it and stream it but not in all device cases. You need to change .htAccess file on server side. Change in output filter and include file format .mp4 to exclude it from being zip at streaming time.
SetEnvIfNoCase Request_URI \.(?:gif|jpe?g|png|swf|mp4)$ \ no-gzip dont-vary

Google recently open-sourced Exoplayer after Google IO 2014.
My experience with video playing with it was good so far.
https://github.com/google/ExoPlayer
I could stream videos from Dropbox/AWS
Stream videos from youtube.
Things still depend upon codecs supported by the device.

I had this same issue while using VideoView, while i tried to check all things regarding the video the issue was in the AndroidManifest.xml File, It was regarding the permission to use EXTERNAL STORAGE give it a shot it might solve the issue.

I came across the same problem and what worked for is adding the Internet permission to the manifest file since I am getting video from url.
<uses-permission android:name="android.permission.INTERNET"/>
This is how I am populating listview of videos.
//assign video
mVideosListView = (ListView) findViewById(R.id.videoListView);
//create videos
Video riverVideo = new Video("https://s3.amazonaws.com/androidvideostutorial/862009639.mp4");
Video carsVideo = new Video("https://s3.amazonaws.com/androidvideostutorial/862013714.mp4");
Video townVideo = new Video("https://s3.amazonaws.com/androidvideostutorial/862014159.mp4");
Video whiteCarVideo = new Video("https://s3.amazonaws.com/androidvideostutorial/862014159.mp4");
Video parkVideo = new Video("https://s3.amazonaws.com/androidvideostutorial/862014834.mp4");
Video busyCityVideo = new Video("https://s3.amazonaws.com/androidvideostutorial/862017385.mp4");
mVideosList.add(riverVideo);
mVideosList.add(carsVideo);
mVideosList.add(townVideo);
mVideosList.add(whiteCarVideo);
mVideosList.add(parkVideo);
mVideosList.add(busyCityVideo);
/***populate video list to adapter**/
mVideoAdapter = new VideoAdapter(this, mVideosList);
mVideosListView.setAdapter(mVideoAdapter);

I faced the same issue once. In My case only issue was fie format. i Just changed the video format to .mp4 and it works like charm on all the devices and emulator i used.
my suggestion is to check your video format first and then try other solutions.

For me was a problem with the codec used by video.
I installed the Any Video Converter and converted the video using the settings for Google Android (x264).
Now I can play on every device.

My problem was I had saved it in .avi format instead of .m4v format, and it worked liked a charm on my Samsung...thanks for everyone's help!

"RingtoneManager: unable to find a usable ringtone" persistent error

Some users of our app are reporting that ringtones fail to load as expected. I've included a typical logcat output from one of these users below. It seems that the request for the default ringtone is returning null ("Failed to open ringtone content://settings/system/ringtone"). I've asked these users to change ringtones, and sometimes this resolves the issue, but in other cases (HTC Hero in both the ones I know of) changing the ringtone does not fix the problem. I have been unable to reproduce this problem on any of our test devices. Any thoughts as to what might cause this, how to debug, or how to resolve?
D/Ringtone( 743): create mAudio
D/MediaPlayer( 743): setDataSource(44, 0, 576460752303423487) pid = 743
E/Mp3HwPlayer( 56): ID:24, new Mp3HwPlayer
E/MediaPlayerService( 56): getPlayerType(): Has ID3 info, size = 1024
E/MediaPlayerService( 56): getPlayerType(): Input buffer is MPA format
E/Mp3HwPlayer( 56): ID:24, destory Mp3HwPlayer
D/MediaPlayerService( 56): Create Player playertype=6
D/MediaPlayerService( 56): new PVPlayer for MP3
D/PVPlayer( 56): setDataSource(25, 0, 180143)
D/MediaPlayerService( 56): MediaPlayerService::Client::setDataSource exit
D/MediaPlayerService( 56): returned from setDataSource() in MediaPlayerService::create
D/MediaPlayerService( 56): [23] prepareAsync
I/PlayerDriver( 56): OpenCore disable firewall payload
W/MediaPlayer( 743): info/warning (1, 26)
E/PlayerDriver( 56): Command PLAYER_PREPARE completed with an error or info PVMFErrResource
E/MediaPlayer( 743): error (1, -17)
E/RingtoneManager( 743): Failed to open ringtone content://settings/system/ringtone
E/RingtoneManager( 743): unable to find a usable ringtone
E/IncomingRinger( 743): Couldn't find a ringtone for URI: content://settings/system/ringtone

It looks like the ringtone is stored on a SD card, and you haven't permission to read SD data, so it returns null. I got similar problem with my mediaPlayer.