private IEnumerator RenderRoutine(float length)
{
// Calculate audioData
int audioSamples = clip.frequency;
int channels = clip.channels;
float[] samples = new float[clip.samples * channels];
clip.GetData(samples, 0);
int samplesPerFrame = audioSamples / fps;
// Create output rendering camera
Camera renderCam = CreateRenderingCamera();
RenderTexture tex = renderCam.targetTexture;
// Create native recorder
MP4Recorder recorder =
new MP4Recorder(tex.width, tex.height, fps, audioSamples, channels, s => { Debug.Log(s); });
FixedIntervalClock clock = new FixedIntervalClock(fps);
// Loop each rendering frame to grab and commit frame and samples
for (int frame = 0; frame < length * fps; frame++)
{
yield return(new WaitForEndOfFrame());
long timestamp = clock.Timestamp;
Texture2D fTex = RenderTextureToTexture2D(tex);
float[] commitSamples = GetPartialSampleArray(samples, samplesPerFrame * frame, samplesPerFrame);
recorder.CommitFrame(fTex.GetPixels32(), timestamp);
recorder.CommitSamples(commitSamples, timestamp);
DestroyImmediate(fTex);
Debug.Log($"Generated Frame {frame}/{(int) (length * fps) - 1}");
}
// Complete render and dispose the native recorder
// Disposing also finishes the file encoding
recorder.Dispose();
}
// Invoked by NatMic audio device with new audio sample buffer
public void OnSampleBuffer(float[] sampleBuffer, int sampleRate, int channelCount, long timestamp)
{
// Send sample buffers directly to the video recorder for recording
videoRecorder.CommitSamples(sampleBuffer, recordingClock.Timestamp);
}
