Hello,
I am using Samsung N7100 device to test encoding capabilities of mediacodec
API, and I am not able to get any meaningful results. Basically, I am able
to successfully setup encoder, then I am able to enqueu input buffers, I
am also getting 2 output buffers worth of data before the encoder gets
stuck and no output buffer gets dequeued anymore, causing input buffers to
fail to enqueuing further data. I tried 3 supported device codecs (avc,
3gpp, mp4v-es) all with similar results.
Here is how I setup:
codec = MediaCodec.createEncoderByType("video/avc");
> MediaFormat format = MediaFormat.createVideoFormat("video/avc", WIDTH,
> HEIGHT);
> format.setInteger(MediaFormat.KEY_BIT_RATE, 5000000);
> format.setFloat(MediaFormat.KEY_FRAME_RATE, (float)7.5);
> format.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, 1);
> format.setInteger(MediaFormat.KEY_COLOR_FORMAT,
> MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420Planar );
> codec.configure(format, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);
> codec.start();
Then I feed the encoder:
int inputBufferIndex = codec.dequeueInputBuffer(TIMEOUT);
> if (inputBufferIndex >= 0) {
> convertRGBtoYUV420EncoderInput(rgbData, WIDTH, HEIGHT,
> codecInputBuffers[inputBufferIndex]);
> codec.queueInputBuffer(inputBufferIndex, 0,
> codecInputBuffers[inputBufferIndex].capacity(), 0, 0);
> }
> else{
> myLog.i("Cannot yet enque more data #:" + inputBufferIndex);
> }
>
And I get output data like so:
info = new MediaCodec.BufferInfo();
> int outputBufferIndex = codec.dequeueOutputBuffer(info, TIMEOUT);
> if (outputBufferIndex >= 0) {
> byte[] dst = new byte[info.size];
> codecOutputBuffers[outputBufferIndex].get(dst, 0, info.size);
>
> codec.releaseOutputBuffer(outputBufferIndex, false);
}
When I set TIMEOUT to -1 the call to codec.dequeueOutputBuffer never
returns after getting 2 output buffers worth of data (basically just AVC
header). Also BufferInfo has only 0s and no usefull information, thus I
dont get really any errors but buffers dont work. Is there anything else
that needs to get setup e.g. filling input buffer with some further codec
config before I start feeding it real YUV video data???
Any help or working sample would be highly apreciated...
Thanks,
-peter
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