Question

I'm creating video filter for Android app, so I'm using TextureView to play video and filter on its SurfaceTexture. But the FPS of video's always lower than original(30fps).

As I checked on Galaxy S3, onSurfaceTextureUpdated() only enter 5~8 times per sec although having filter or not. But on stronger device, as Samsung Galaxy J, it could increase to 10~13 times per sec

Note that this video load from SD card.

Does someone know the reason?

mVideoPlayer.reset();
mVideoPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mVideoPlayer.setDataSource(mVideoPath);
mVideoPlayer.setSurface(new Surface(surfaceTexture));
mVideoPlayer.setLooping(true); mVideoPlayer.prepareAsync();
mVideoPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
    public void onPrepared(MediaPlayer mp) {mp.start(); }
});

Answer 1

如果正在从软件访问视频帧，那么数据必须被复制几次，这会杀死你的FPS。

如果您将视频直接发送到与TextureView关联的Surface，您将看不到减速，但您也没有机会对其进行过滤。（Grafika有基于SurfaceView和TextureView的视频播放器，性能没有明显差异.SurfaceView效率稍高，但并不是那么显着。）

要以30fps的速度进行实时过滤，您可以像this example一样使用GPU，尽管您可以使用它进行限制。

Answer 2

用更多设备检查后，我发现导致此问题的主要原因是内存。所以我在完成此活动之前完成了之前的活动并发布了数据。然后视频的FPS在S3上增加到10 +。

谢谢，

Video is in low fps when playing on TextureView

2 个答案: