MediaCodec Lollipop not decoding raw H264 stream 1080P at 60 FPS

Question

This is my follow up question to below thread

Slow H264 1080P@60fps Decoding on Android Lollipop 5.0.2

On the path of debugging the root cause of above issue, I tried various approach to Decode 1080P at 60 FPS.

• I tried wrapping H264 data into a MP4 container(without transcoding). The playback of MP4 with various stock player seems slow(less than 60fps , around 42fps).

• I tried using native codec samples from Android NDK. Still no progress.

• Later I compiles the mxc-vpu-test code from the Freescale Android Source
  tree. With this and using the correct parameters, I was Capable of
  playing the video at 60 FPS.

So My doubts are

1. Is the decoder capable of playing 1080p@60fps video, with correct Frame rate ?
2. If so, then why MediaCodec ( using ACodec code internally ) is not capable of playing 1080p@60fps video.
3. I am not sure if OMXCodec is used in this process, Where can I get OMXCodec sample code to decode my video.

Answer 1

Is the decoder capable of playing 1080p@60fps video, with correct Frame rate ?

Totally depends on the device.

If so, then why MediaCodec ( using ACodec code internally ) is not capable of playing 1080p@60fps video.

h.264 has levels. 1080p@60 requires level 4.2 or higher. If the chip on your device only supports 4.0, then it cant do 1080@60. Why? Money and battery. 1080@60 requires twice the decoding power of 1080@30, cutting into profit margins and battery life for something most people will never notice.

I am not sure if OMXCodec is used in this process, Where can I get OMXCodec sample code to decode my video.

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