videos on android - stuff what i learned

Videos on AndroidStuff What I Learned

In the beginning…

>200 Videos

1080p H.264

~10MB

2GB

50MB-100MB / routine

0.5TB/month

1GB/month

10MB → <1MB

1GB/month → <10MB total

{ "id": 117, "name": "Hamstring Hanging Stretch", "description": "Position yourself lying on your front on a flat, raised surface. Allow the lower part of your leg to hang off the edge. Let the weight of your foot straighten your knee.", "sets": 3, "reps": 8, "hold_duration": 10, "rest": 30, "created": "2013-12-02 22:03:21", "modified": "2013-12-23 16:59:02", "video": { "id": 132, "url": "/ddaf3d7d59b4dd09fae6d34e760236d9/320p-16to9.mp4", "hold_time_seconds": 4.3, "loop_time_start_seconds": 0, "loop_time_end_seconds": 0, "etag": "b38f39cebe21487dd2ed123d16065d7b" } }

Let’s Code!

Both.

I hate this device. It’s great!

developer.android.com/guide/appendix/media-formats.html

Video ViewSurfaceView

MediaPlayer

start()pause()seekTo()

getDuration()

setVideoURI()setVideoPath()

setOnPreparedListener()setOnCompletionListener()

vv.vv.vv.

vv.

vv.vv.

vv.vv.

VideoView vv = (VideoView) findViewById(R.id.videoView);vv.setVideoPath(path);!

vv.setOnPreparedListener (new OnPreparedListener() { @Override public void onPrepared(MediaPlayer mp) { mp.setLooping(true); }});!

vv.start();

Disclaimer: This isn’t meant to happen.

–Android API Docs

“SurfaceView punches a hole in its window to allow its surface to be displayed.”

TextureView

• Android 4.0 • Behaves as a regular view • OpenGL, Video etc

implement TextureView.SurfaceTextureListener

public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height)!

!

public boolean onSurfaceTextureDestroyed(SurfaceTexture surface)!

!

public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height)!

!

public void onSurfaceTextureUpdated(SurfaceTexture surface)

public void onSurfaceTextureAvailable(SurfaceTexture surfaceT, int width, int height) { Surface surface = new Surface(surfaceT); try { mediaPlayer.setDataSource(path); } catch (Exception e) { }!

mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() { @Override public void onPrepared(MediaPlayer mp) { mp.setLooping(true); mp.start(); } });!

mediaPlayer.setSurface(surface);!

mediaPlayer.prepareAsync();}

public boolean onSurfaceTextureDestroyed(SurfaceTexture surfaceT) { mediaPlayer.release(); return true;}

Hey Mark, what about YouTube?

YouTubePlayer

MediaController• Just a view containing media controls • Implement all callbacks with setMediaPlayer(); • start(), pause(), seekTo() etc callbacks • Hook these up to your MediaPlayer :

public void start() { mediaPlayer.start();}!public void pause() { mediaPlayer.pause();}!public void seekTo(int i) { mediaPlayer.seekTo(i);}

MediaMetadataRetriever

• Get a frame as a Bitmap • Useful when waiting for video to load or when using VideoView

metadataRetriever.setDataSource(ctx, path);!Bitmap bitmap = metadataRetriever.getFrameAtTime(0L, MediaMetadataRetriever.OPTION_CLOSEST);!if (bitmap != null) { BitmapDrawable previewBitmap = new BitmapDrawable(this.getResources(), bitmap); imageView.setImageDrawable(previewBitmap);}

Playing Audio?

!setVolumeControlStream(AudioManager.STREAM_MUSIC);

Y U NO USE INTENT?!

In Summary

• Think about your content • “I need shiny 1080p” • Resolution/user dependent content? • Be nice, cache (and cache hard) if possible • Assume nothing and be prepared • TextureView when 4.0 • VideoView when <4.0 • Test • Test • Test • Test • Test • Test

Fin.

@mhemmings