Why Is Video Made With Mediacodec Garbled For Samsung Galaxy S7?

When I encode a video via Surface -> MediaCodec -> MediaMuxer, I get a very strange result when testing on the Samsung Galaxy S7. For other devices tested (emulator with Mars

Solution 1:

Per Android Docs for MediaCodec.createInputSurface():

The Surface must be rendered with a hardware-accelerated API, such as OpenGL ES. lockCanvas(android.graphics.Rect) may fail or produce unexpected results.

I must have missed (or ignored) that in writing the code. Since I was using lockCanvas() to get a canvas upon which to draw my video frames, the code broke. I have put a quick fix on the problem by using lockHardwareCanvas() if API level >= 23 (since it is unavailable prior to that and since the code ran fine on API level 19).

Long term however (for me and anyone else who might stumble across this), I may have to get into more OpenGL stuff for a more permanent and stable solution. It's not worth going that route though unless I find an example of a device which will not work with my quick fix.

Solution 2:

If you are still looking for an example for rendering bitmaps to a InputSurface. 

I was able to getthis to work.
Look at my answers here.
https://stackoverflow.com/a/49331192/7602598
https://stackoverflow.com/a/49331352/7602598
https://stackoverflow.com/a/49331295/7602598