// https://github.com/lanhq147/SampleMediaFrame/blob/e2f20ff9eef73318e5a9b4de15458c5c2eb0fd46/app/src/main/java/com/google/android/exoplayer2/video/av/HWRecorder.java
public bool BeginEncoding(int resX, int resY, int rateNumer, int rateDenom, int videoBitRate, int audioBitRate, string audioFile, string outputFile)
{
videoBufferInfo = new MediaCodec.BufferInfo();
audioBufferInfo = new MediaCodec.BufferInfo();
frameRateNumer = rateNumer;
frameRateDenom = rateDenom;
MediaFormat videoFormat = MediaFormat.CreateVideoFormat(VideoMimeType, resX, resY);
videoFormat.SetInteger(MediaFormat.KeyColorFormat, (int)MediaCodecCapabilities.Formatsurface);
videoFormat.SetInteger(MediaFormat.KeyBitRate, videoBitRate * 1000);
videoFormat.SetFloat(MediaFormat.KeyFrameRate, rateNumer / (float)rateDenom);
videoFormat.SetInteger(MediaFormat.KeyIFrameInterval, 4);
videoFormat.SetInteger(MediaFormat.KeyProfile, (int)MediaCodecProfileType.Avcprofilehigh);
videoFormat.SetInteger(MediaFormat.KeyLevel, (int)MediaCodecProfileLevel.Avclevel31);
videoEncoder = MediaCodec.CreateEncoderByType(VideoMimeType);
videoEncoder.Configure(videoFormat, null, null, MediaCodecConfigFlags.Encode);
surface = videoEncoder.CreateInputSurface();
videoEncoder.Start();
MediaFormat audioFormat = MediaFormat.CreateAudioFormat(AudioMimeType, 44100, 1);
audioFormat.SetInteger(MediaFormat.KeyAacProfile, (int)MediaCodecProfileType.Aacobjectlc);
audioFormat.SetInteger(MediaFormat.KeyBitRate, audioBitRate * 1000);
audioEncoder = MediaCodec.CreateEncoderByType(AudioMimeType);
audioEncoder.Configure(audioFormat, null, null, MediaCodecConfigFlags.Encode);
audioEncoder.Start();
try
{
muxer = new MediaMuxer(outputFile, MuxerOutputType.Mpeg4);
}
catch
{
return(false);
}
videoTrackIndex = -1;
audioTrackIndex = -1;
muxerStarted = false;
if (!ElgInitialize())
{
return(false);
}
audioData = File.ReadAllBytes(audioFile);
if (audioData == null)
{
return(false);
}
DrainEncoder(videoEncoder, videoBufferInfo, videoTrackIndex, false);
DrainEncoder(audioEncoder, audioBufferInfo, audioTrackIndex, false);
audioEncodingTask = Task.Factory.StartNew(AudioEncodeThread, TaskCreationOptions.LongRunning);
return(true);
}