![]() ![]() It spawns 2 threads for recording audio and video. I wrote a main class that performs the encoding. I use OpenGL to overlay text on the image while recording. Short getSamplesForChannel(MediaCodec codec, int bufferId, int channelIx) else if (outputBufferId = MediaCodec.I'm trying to encode video from camera and audio from microphone using MediaCodec and MediaMuxer. Raw audio buffers contain entire frames of PCM audio data, which is one sample for each channel In either case, buffers do not start or end on arbitrary byte boundaries, but rather on This requirement is slightly relaxed in that a buffer may contain multiple encoded access units ![]() Segment typically containing a few milliseconds of audio as dictated by the format type), but For audio data this is normally a single access unit (an encoded audio For video types this is a singleĬompressed video frame. Input buffers (for decoders) and output buffers (for encoders) contain compressed data according When using ByteBuffer mode, you can access raw videoįrames using the Image class and getInput/ OutputImage(int). This may still be moreĮfficient than using ByteBuffers, as some native buffers may be mapped into direct ByteBuffers. ImageReader class to access unsecured decoded (raw) video frames. You normally cannot access the raw video data when using a Surface, but you can use the Surface uses native videoīuffers without mapping or copying them to ByteBuffers thus, it is much more efficient. The codec uses up the data and transforms it into one of its empty output buffers.įinally, you request (or receive) a filled output buffer, consume its contents and release itĬodecs operate on three kinds of data: compressed data, raw audio data and raw video data.Īll three kinds of data can be processed using ByteBuffers, but you should useĪ Surface for raw video data to improve codec performance. (or receive) an empty input buffer, fill it up with data and send it to the codec for It processes dataĪsynchronously and uses a set of input and output buffers. In broad terms, a codec processes input data to generate output data. MediaDrm, Image, Surface, and AudioTrack.) With MediaExtractor, MediaSync, MediaMuxer, MediaCrypto, It is part of the Android low-level multimedia support infrastructure (normally used together ![]() MediaCodec class can be used to access low-level media codecs, i.e. RemoteController.OnClientUpdateListener.RemoteControlClient.OnPlaybackPositionUpdateListener.RemoteControlClient.OnMetadataUpdateListener.RemoteControlClient.OnGetPlaybackPositionListener.MediaScannerConnection.OnScanCompletedListener.MediaScannerConnection.MediaScannerConnectionClient.MediaPlayer.OnTimedMetaDataAvailableListener. ![]() AudioTrack.OnPlaybackPositionUpdateListener.AudioRecord.OnRecordPositionUpdateListener. ![]()
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