The VideoLAN Forums

Posted: **16 Sep 2014 20:59**

Hi,
I'm trying to use the libVLC for playing a video file.
i have working audio but i can't see picture on the SurfaceView.
LogCat says: yuv_rgb_neon filter: can't get output picture.
also I've notice that the original VLC app doesn't load the yuv_rgb_neon filter, but my app does load it.
what is this filter? how can I disable this filter?

my Code:

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        try {
            mLibVLC = VLCInstance.getLibVlcInstance();
        } catch (LibVlcException e) {
            // faild
            return;
        }
        VLCInstance.updateLibVlcSettings(null);  //        aout = 1; vout = 0; deblocking = -1; hardwareAcceleration = 2;
        final SurfaceView mSurface = (SurfaceView) findViewById(R.id.player_surface);
        SurfaceHolder mSurfaceHolder = mSurface.getHolder();
        mSurfaceHolder.setFormat(PixelFormat.RGBX_8888);
        mSurfaceHolder.addCallback(mSurfaceCallback);
        //mLibVLC.setHardwareAcceleration(LibVLC.HW_ACCELERATION_FULL); 
        mLibVLC.eventVideoPlayerActivityCreated(true);

my SurfaceHolder Callback:

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    private final SurfaceHolder.Callback mSurfaceCallback = new Callback() {
        @Override
        public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
            if(mLibVLC != null)
                mLibVLC.attachSurface(holder.getSurface(), MainActivity.this);
        }

        @Override
        public void surfaceCreated(SurfaceHolder holder) {
        }

        @Override
        public void surfaceDestroyed(SurfaceHolder holder) {
            if(mLibVLC != null)
                mLibVLC.detachSurface();
        }
    };

playing a Video:

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mLibVLC.setMediaList();
String mLocation = "file:///storage/extSdCard/a.mp4";
mLibVLC.getMediaList().add(new Media(mLibVLC, mLocation));
int savedIndexPosition = mLibVLC.getMediaList().size() - 1;
mLibVLC.playIndex(savedIndexPosition);
mLibVLC.play();
mSurface.setKeepScreenOn(true);

thanks.

Posted: **16 Sep 2014 22:29**

yuv_rgb_neon converts YUV video to RGB colour space with the NEON vector unit. It is there because your application requests RGB format.

Posted: **08 Jul 2015 17:14**

Was there ever a resolution to this actual issue (the video not showing)?

I'm getting the same error trying to integrate libVLC into an Android app. Thx.

Posted: **09 Jul 2015 17:31**

As further information - the first fishy thing I see in the log is this warning:

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W/VLC﹕ [5d1e0d0c] core video output: Not enough display buffers in the pool, requested 3 got 1

Next is:

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E/VLC﹕ [5d0ade94] core vout display: Failed to change zoom

And then it starts producing these:

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W/VLC﹕ [5d26acbc] yuv_rgb_neon filter: can't get output picture

Posted: **09 Jul 2015 20:32**

This means that, for whatever reasons, YUV to RGB conversion was necessary, and the conversion filter was unable to allocate an output buffer.

Posted: **09 Jul 2015 21:37**

Okay, so what could be some of those reasons?

Have I not initialized something properly?

Can you give me any pointers for where to look in my logic flow?

Thanks for your help.

Posted: **09 Jul 2015 22:41**

I don't know.

Posted: **11 Jul 2015 18:24**

For anyone else that has this issue, I solved it - at least for my case.

It turned out to be an order of operations problem. I was calling init() on my LibVlc instance before I had set options like hardware acceleration, etc.

Setting these options first and then calling the init solved the problem.

Posted: **15 Jul 2015 23:18**

For anyone else that has this issue, I solved it - at least for my case.

It turned out to be an order of operations problem. I was calling init() on my LibVlc instance before I had set options like hardware acceleration, etc.

Setting these options first and then calling the init solved the problem.

Those options should now be on the media level.

Posted: **16 Jul 2015 13:53**

Can you please explain what you mean? Looking at the source here:

https://github.com/simonlinj/vlc-androi ... tance.java

All of those options are set when the libVlc instance is created.

Posted: **16 Jul 2015 14:38**

This is not the source of VLC/Android.

Posted: **16 Jul 2015 18:56**

Okay. Is there a repo with the official source?

Posted: **16 Jul 2015 21:16**

https://git.videolan.org/?p=vlc-ports/a ... ;a=summary

Posted: **16 Jul 2015 22:20**

Thanks very much.

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