/**
* Edits a video file, saving the contents to a new file. This involves decoding and
* re-encoding, not to mention conversions between YUV and RGB, and so may be lossy.
* <p>
* If we recognize the decoded format we can do this in Java code using the ByteBuffer[]
* output, but it's not practical to support all OEM formats. By using a SurfaceTexture
* for output and a Surface for input, we can avoid issues with obscure formats and can
* use a fragment shader to do transformations.
*/
private VideoChunks editVideoFile(VideoChunks inputData)
{
if (AppSettings.Logging.SendToConsole)
{
Log.Debug(TAG, "editVideoFile " + mWidth + "x" + mHeight);
}
VideoChunks outputData = new VideoChunks();
MediaCodec decoder = null;
MediaCodec encoder = null;
InputSurface inputSurface = null;
OutputSurface outputSurface = null;
try {
MediaFormat inputFormat = inputData.getMediaFormat();
// Create an encoder format that matches the input format. (Might be able to just
// re-use the format used to generate the video, since we want it to be the same.)
MediaFormat outputFormat = MediaFormat.CreateVideoFormat(MIME_TYPE, mWidth, mHeight);
outputFormat.SetInteger(MediaFormat.KeyColorFormat, (int)MediaCodecInfo.CodecCapabilities.COLORFormatSurface);
outputFormat.SetInteger(MediaFormat.KeyBitRate, inputFormat.GetInteger(MediaFormat.KeyBitRate));
outputFormat.SetInteger(MediaFormat.KeyFrameRate, inputFormat.GetInteger(MediaFormat.KeyFrameRate));
outputFormat.SetInteger(MediaFormat.KeyIFrameInterval, inputFormat.GetInteger(MediaFormat.KeyIFrameInterval));
outputData.setMediaFormat(outputFormat);
encoder = MediaCodec.CreateEncoderByType(MIME_TYPE);
encoder.Configure(outputFormat, null, null, MediaCodecConfigFlags.Encode);
inputSurface = new InputSurface(encoder.CreateInputSurface());
inputSurface.MakeCurrent();
encoder.Start();
// OutputSurface uses the EGL context created by InputSurface.
decoder = MediaCodec.CreateDecoderByType(MIME_TYPE);
outputSurface = new OutputSurface();
outputSurface.ChangeFragmentShader(FRAGMENT_SHADER);
decoder.Configure(inputFormat, outputSurface.Surface, null, 0);
decoder.Start();
editVideoData(inputData, decoder, outputSurface, inputSurface, encoder, outputData);
} finally {
if (AppSettings.Logging.SendToConsole)
{
Log.Debug(TAG, "shutting down encoder, decoder");
}
if (outputSurface != null)
{
outputSurface.Release();
}
if (inputSurface != null)
{
inputSurface.Release();
}
if (encoder != null)
{
encoder.Stop();
encoder.Release();
}
if (decoder != null)
{
decoder.Stop();
decoder.Release();
}
}
return(outputData);
}
/**
* Configures encoder and muxer state, and prepares the input Surface. Initializes
* mEncoder, mMuxer, mInputSurface, mBufferInfo, mTrackIndex, and mMuxerStarted.
*/
private void prepareEncoder()
{
mBufferInfo = new MediaCodec.BufferInfo();
MediaFormat format = MediaFormat.CreateVideoFormat(MIME_TYPE, _width, _height);
// Set some properties. Failing to specify some of these can cause the MediaCodec
// configure() call to throw an unhelpful exception.
format.SetInteger(MediaFormat.KeyColorFormat, (int)MediaCodecCapabilities.Formatsurface);
format.SetInteger(MediaFormat.KeyBitRate, _bitRate);
format.SetInteger(MediaFormat.KeyFrameRate, FRAME_RATE);
format.SetInteger(MediaFormat.KeyIFrameInterval, IFRAME_INTERVAL);
if (VERBOSE)
{
Log.Debug(TAG, "format: " + format);
}
// Create a MediaCodec encoder, and configure it with our format. Get a Surface
// we can use for input and wrap it with a class that handles the EGL work.
//
// If you want to have two EGL contexts -- one for display, one for recording --
// you will likely want to defer instantiation of CodecInputSurface until after the
// "display" EGL context is created, then modify the eglCreateContext call to
// take eglGetCurrentContext() as the share_context argument.
mEncoder = MediaCodec.CreateEncoderByType(MIME_TYPE);
mEncoder.Configure(format, null, null, MediaCodec.ConfigureFlagEncode);
_inputSurface = new InputSurface(mEncoder.CreateInputSurface());
mEncoder.Start();
// Output filename. Ideally this would use Context.getFilesDir() rather than a
// hard-coded output directory.
string outputPath = System.IO.Path.Combine(_workingDirectory, "test." + _width + "x" + _height + ".mp4");
Log.Info(TAG, "Output file is " + outputPath);
// Create a MediaMuxer. We can't add the video track and start() the muxer here,
// because our MediaFormat doesn't have the Magic Goodies. These can only be
// obtained from the encoder after it has started processing data.
//
// We're not actually interested in multiplexing audio. We just want to convert
// the raw H.264 elementary stream we get from MediaCodec into a .mp4 file.
try {
mMuxer = new MediaMuxer(outputPath, MediaMuxer.OutputFormat.MuxerOutputMpeg4);
} catch (System.Exception e) {
throw new System.Exception(e.Message);
}
mTrackIndex = -1;
mMuxerStarted = false;
}
private void SetupEncoder()
{
MediaFormat outputFormat = MediaFormat.CreateVideoFormat(MediaHelper.MIME_TYPE_AVC, mWidth, mHeight);
outputFormat.SetInteger(MediaFormat.KeyColorFormat, (int)MediaCodecCapabilities.Formatsurface);
outputFormat.SetInteger(MediaFormat.KeyBitRate, mBitRate);
outputFormat.SetInteger(MediaFormat.KeyFrameRate, mFrameRate);
outputFormat.SetInteger(MediaFormat.KeyIFrameInterval, mIFrameInterval);
mEncoder = MediaCodec.CreateEncoderByType(MediaHelper.MIME_TYPE_AVC);
mEncoder.Configure(outputFormat, null, null, MediaCodecConfigFlags.Encode);
mInputSurface = new InputSurface(mEncoder.CreateInputSurface());
mInputSurface.MakeCurrent();
mEncoder.Start();
}
/**
* Configures encoder and muxer state, and prepares the input Surface. Initializes
* mEncoder, mMuxer, mInputSurface, mBufferInfo, mTrackIndex, and mMuxerStarted.
*/
private void prepareEncoder(string outputPath)
{
_bfi = new MediaCodec.BufferInfo();
LatestOutputPath = outputPath;
MediaFormat format = MediaFormat.CreateVideoFormat(MIME_TYPE, _width, _height);
// Set some properties. Failing to specify some of these can cause the MediaCodec
// configure() call to throw an unhelpful exception.
format.SetInteger(MediaFormat.KeyColorFormat, (int)MediaCodecCapabilities.Formatsurface);
format.SetInteger(MediaFormat.KeyBitRate, _bitRate);
format.SetInteger(MediaFormat.KeyFrameRate, FRAME_RATE);
format.SetInteger(MediaFormat.KeyIFrameInterval, IFRAME_INTERVAL);
if (AppSettings.Logging.SendToConsole)
{
Log.Debug(TAG, "format: " + format);
}
// Create a MediaCodec encoder, and configure it with our format. Get a Surface
// we can use for input and wrap it with a class that handles the EGL work.
//
// If you want to have two EGL contexts -- one for display, one for recording --
// you will likely want to defer instantiation of CodecInputSurface until after the
// "display" EGL context is created, then modify the eglCreateContext call to
// take eglGetCurrentContext() as the share_context argument.
mEncoder = MediaCodec.CreateEncoderByType(MIME_TYPE);
mEncoder.Configure(format, null, null, MediaCodec.ConfigureFlagEncode);
_inputSurface = new InputSurface(mEncoder.CreateInputSurface());
mEncoder.Start();
Log.Info(TAG, "Output file is " + outputPath);
try {
_muxer = new MediaMuxer(outputPath, MediaMuxer.OutputFormat.MuxerOutputMpeg4);
} catch (System.Exception e) {
throw new System.Exception(e.Message);
}
mTrackIndex = -1;
MuxerStarted = false;
}
// 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);
}
/**
* Generates a test video file, saving it as VideoChunks. We generate frames with GL to
* avoid having to deal with multiple YUV formats.
*
* @return true on success, false on "soft" failure
*/
private bool generateVideoFile(VideoChunks output)
{
if (AppSettings.Logging.SendToConsole)
{
Log.Debug(TAG, "generateVideoFile " + mWidth + "x" + mHeight);
}
MediaCodec encoder = null;
InputSurface inputSurface = null;
try {
MediaCodecInfo codecInfo = selectCodec(MIME_TYPE);
if (codecInfo == null)
{
// Don't fail CTS if they don't have an AVC codec (not here, anyway).
Log.Error(TAG, "Unable to find an appropriate codec for " + MIME_TYPE);
return(false);
}
if (AppSettings.Logging.SendToConsole)
{
Log.Debug(TAG, "found codec: " + codecInfo.Name);
}
// We avoid the device-specific limitations on width and height by using values that
// are multiples of 16, which all tested devices seem to be able to handle.
MediaFormat format = MediaFormat.CreateVideoFormat(MIME_TYPE, mWidth, mHeight);
// Set some properties. Failing to specify some of these can cause the MediaCodec
// configure() call to throw an unhelpful exception.
format.SetInteger(MediaFormat.KeyColorFormat,
(int)MediaCodecCapabilities.Formatsurface);
format.SetInteger(MediaFormat.KeyBitRate, mBitRate);
format.SetInteger(MediaFormat.KeyFrameRate, FRAME_RATE);
format.SetInteger(MediaFormat.KeyIFrameInterval, IFRAME_INTERVAL);
if (AppSettings.Logging.SendToConsole)
{
Log.Debug(TAG, "format: " + format);
}
output.setMediaFormat(format);
// Create a MediaCodec for the desired codec, then configure it as an encoder with
// our desired properties.
encoder = MediaCodec.CreateByCodecName(codecInfo.Name);
encoder.Configure(format, null, null, MediaCodecConfigFlags.Encode);
inputSurface = new InputSurface(encoder.CreateInputSurface());
inputSurface.MakeCurrent();
encoder.Start();
generateVideoData(encoder, inputSurface, output);
} finally {
if (encoder != null)
{
if (AppSettings.Logging.SendToConsole)
{
Log.Debug(TAG, "releasing encoder");
}
encoder.Stop();
encoder.Release();
if (AppSettings.Logging.SendToConsole)
{
Log.Debug(TAG, "released encoder");
}
}
if (inputSurface != null)
{
inputSurface.Release();
}
}
return(true);
}