Setting position (rewind) does not work properly while playing RTMP streams (static files, not live stream) in the VLC player.
The problem was discovered when developing an Android application to work with video archive by RTMP. The application uses a LibVLC player (de.mrmaffen: vlc-android-sdk: 1.9.0). To set the position, use the following code:
if (length == 0f)
mMediaPlayer.setTime(position);
else
mMediaPlayer.setPosition(position / length);
If position is right of the current, the player "waiting" until it comes to this position, focusing on the last frame, and can then start / not start playing from the desired position. If position left of the current, it is reset to the current and will continue to play with it.
If you specify a different stream format (eg, http://html5demos.com/assets/dizzy.mp4), the setting position is working properly. On the PC in the normal media player VLC problem also occurs. In other players the setting position of RTMP streams works fine.
Can you do something about this bug or work around it to begin to setting position in LibVLC?
Related
My app requires to record a video to capture the IFrames only (and not the P/B frames).
I am making use of the Media Recorder to capture the video (Not using cameraX as I need HEVC and camerax is recording in H.264).
The 'MediaRecorder.MetricsConstants.VIDEO_IFRAME_INTERVAL' is set to 1, by default - hence I get an IFrame every 1 sec and the rest of the frames in a second are 'P'. I need the VIDEO_IFRAME_INTERVAL constant to be set to 0, inorder to make all the frames 'I'. I have tried different ways to set it. Any help would be much appreciated.
I have tried setting it this way:
mRecorder.metrics.deepCopy().apply {
this.putInt(MediaRecorder.MetricsConstants.VIDEO_IFRAME_INTERVAL, 0)
}
Even if I set it to '2', '5' or '10' it doesn't seem to be having an effect.
We are trying play audio from url (m3u8 file). Media player starts fine no issues. Audio also plays cleanly. Issue starts when do seek in the player. Behavior very strange. it seeks to the proper position then starts playing audio. After while it seeks again like couples seconds (better word is skips some seconds since it jumps to the position directly) and can be observed in the media playback time counter, again plays for a while again jumps some seconds and this continues till end of the media.
We have our custom seek bar which is nothing but a progressbar, and when we do seek the progress bar we send same seek position to media player by calling onseek() method.
Note: Issue Happens only Lollipop nexus devices(tablet and phone).
Strange observation jump happens only if the time counters last position 9
(i.e if mediaplayed 12:29[mm:ss] then will jump to some other random place 12:3X[mm:ss],again mediaplayed 12:39[mm:ss] then will jump to some other random place 12:4X [mm:ss] )
Why is it happening?
You should pass the outer manifest to the player. This should resolve your issue.
I would like to play an audio file that starts on the left speaker and then switches to the right speaker.
I have tried doing something like this:
MediaPlayer mp = new MediaPlayer();
// Setup audio file
mp.start();
mp.setVolume(1.0F, 0F);
// Delay a second or two (I actually use a Handler and the postDelayed method)
mp.setVolume(0F, 1.0F);
but the sound comes through on both speakers the whole time.
How can I play audio in Android with either the left or right speaker muted (or at reduced volume)?
EDIT:
I got the correct behavior for a while while I was testing my app, but then it returned to what I described above with the exact same code base. Based on this, is there anything else I could check to find out what's going on?
One option would be
Start mediaplayer with setVolume(1.0F, 0F);
When you want to switch to other speaker, get current position of media player by using getCurrentPosition() method.
Then stop media player.
Then again start with setVolume(0F,1.0F);
Seek to the positin you got in 2nd step using seekTo() method
Done.
Overhead:This method may cause you some delay
It looks like you are doing it correctly according to the Android API http://developer.android.com/reference/android/media/MediaPlayer.html
public void setVolume (float leftVolume, float rightVolume)
Sets the volume on this player. This API is recommended for balancing the output of
audio streams within an application. Unless you are writing an application to control
user settings, this API should be used in preference to setStreamVolume(int, int, int)
which sets the volume of ALL streams of a particular type. Note that the passed volume
values are raw scalars in range 0.0 to 1.0. UI controls should be scaled logarithmically.
Parameters
leftVolume left volume scalar
rightVolume right volume scalar
My best advice is to try 0.0F instead of just 0F and then maybe trying to set the volume before you start playing the track then transition while it's playing.
I'm writing a video player using the VideoView class. I have a "forward" button and I want the player to seek a 10 seconds further, when a user presses it:
if (mVideoView.canSeekForward()) {
int position = mVideoView.getCurrentPosition() + SEEK_TIME;
mVideoView.seekTo(position);
}
But almost always the position after seeking differs much from the desired: for example if position was 33458 in the code above, in my OnSeekCompleteListener.onSeekComplete I would get something like 29742 after calling mVideoView.getCurrentPosition()
This happens with this video and any other m3u8 videos I tried (on Nexus 7, API 19 and Xperia Z, API 17). But with some other streaming videos I don't encounter this bug.
Are there any workarounds? When I tried to play this video in MX Player, it had no problems with seeking, but probably it doesn't use the standard components
I try to stream (progressive e.g: http://server.com/video.mp4)
when i use the standard google mediaplayer (VideoView from android package) and register an onBufferingUpdateListener then i get the bufferpercentage that refers to the download state of the hole video. This player has also a loading view where i can see the buffer state.
This bufferpercentage and view shows me how much of the video has been downloaded.
Now when i use the Vitamio player, the onBufferingUpdateListener shows me after a few seconds 99 percent of buffering and there is no loading view too. And when i pause the playback it stops buffering immediately instead of continue buffering like the google videoview does. This is very usefull if you have a slow http stream.
Is there a way to make the vitamio-videoplayer buffer the videofiles in the same way as the google videoplayer does?
thank you
daniel
Sorry i posted that question as wrong user. Here the Answer of what i tried:
VideoView (android default - just plays few video formats) from inside the android.widget and from io.vov.vitamio.widget (vitamio - plays most video formats) package has the same structure. In both you can register an OnBufferingUdateListener that returns the bufferstate in percent:
videoview.setOnBufferingUpdateListener(new io.vov.vitamio.MediaPlayer.OnBufferingUpdateListener() {
public void onBufferingUpdate(io.vov.vitamio.MediaPlayer mp, int i) {
Log.v(TAG, "Buffer percentage done: "+i);
}
});
or with the android default VideoView:
videoview.setOnBufferingUpdateListener(new android.media.MediaPlayer.OnBufferingUpdateListener() {
public void onBufferingUpdate(android.media.MediaPlayer mp, int i) {
Log.v(TAG, "Buffer percentage done: "+i);
}
});
If i use android.widget.VideoView the buffer percentage slowly increases until it reaches 100% - The video file has been downloaded completely. And it continues updating BufferingUpdate when i press the pause button.
When i use io.vov.vitamio.widget.VideoView the percentage reaches 100% within seconds. Then the video starts and the OnBufferingUpdateListener never gets called again (when i call getBufferPercentage it is always at 99 percent. That seems to be the reason). And as i sayed: It seems to stop buffering when i press the pause button.
I think the buffering works different in vitamio. But that's crap. Especially when i stream videos from the web and the video datarate is higher than the download speed i need to prebuffer the video by pressing pause and wait until it has downloaded enough data to watch it smoothly. Hope you got what i mean. thank you