record internal audio android

recording audio is stored (specify the root directory of the phone sdcard, the file name is Music.mp3) Recorder.setoutputfile ( Environment.getexternalstoragedirectory (). GetAbsolutePath () + "Music.mp3"), try {//6, prepare for recording (ready state) Recorder.prepare ();} catch (IllegalStateException e) {//Todo auto-generated catch Blocke.printstacktrace ();} catch (IOException e) {//Todo Au To-generated catch Blocke.printstacktrace ();} To play th

In Android, audio playback is mainly implemented through the MediaPlayer class. It seems like he is mysterious, but it is actually very simple. Let's take a look at his true colors. I. MediaPalyer Lifecycle The figure below is found on the Internet. Here we only describe several special methods: 650) this. width = 650; "src =" http://www.bkjia.com/uploads/allimg/131228/100H94535-0.gif "title =" 521376_00004

Preparing Status and returns, while the internal playback engine continues to perform an unfinished preparation operation. started Status: media playback is in progress (Start ()), at which point the Seekto () method can be used to specify the location of the media playback; paused Status: Use the paused state in the started state can pause the playback of the MediaPlayer, after the pause can be changed back to started state by the start () method,

calculates the average value. However, the precondition is that the number of channels and the sample value of the two files must be the same. We have also explained the functions of the number of channels and the sample value before, so we can infer that if the sample value is 8 bits and 16 bits, we need to convert byte to short and then overlay the average number; if a single channel needs to be combined with a dual channel, the write algorithm is added to the first half or the second half. T

This project address, the name is recorded video, for starHttps://github.com/979451341/Audio-and-video-learning-materialsThis time the code record video can be used in each player, sometimes long display, compared to the previous code to say why the two effects are different, but I first add some of the previously missing Mediacodec official notes and Mediacodec.bufferinfo1.MediaCodec SupplementBUFFER_FLAG_

you're done * using the MediaRecorder. */ public native void release(); Use of mediarecorder native code is described as follows: A common case of using MediaRecorder to record audio works as follows:MediaRecorder recorder = new MediaRecorder(); recorder.setAudioSource(MediaRecorder.AudioSource.MIC); recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); recorder.setAudioEncoder(Med

Some Android AudioRecord models cannot collect audio, androidaudiorecord During the first Android development, I realized such profound version differences for the first time.My AudioRecord code was successfully tested in Samsung S5670.Xiaomi, duowei D210T test failed. The error message is as follows:04-01 12:58:44. 368: E/AudioRecord (19808): cocould not get

Preparation Tools 1. Download the top mobile phone data recovery software 2. Mobile access to the line root permissions Introduction of top mobile data recovery software It can effectively restore its contacts, contact information, phone records, SMS, QQ chat records, micro-mail chat records, photos, video, audio, documents and so on (currently only on the Android system)

paper deeply analyzes the implementation details of WEBRTC internal about packet loss retransmission (NACK), makes an in-depth study of NACK's SDP negotiation, packet loss determination and retransmission, and lays the foundation for continuing to learn the QoS mechanism of WEBRTC.Reference documents[1] RFC5109-RTP Payload Format for Generic Forward Error Correction.[2] rfc5104-rfc 5104-codec Control Messages in the RTP

On the audio and video calls in the process of minimizing the implementation of this function, similar articles on the network, but it seems to have not seen the clearer explanation, here because the project needs to achieve such a function, today I recorded it down, on the one hand for later use to facilitate their own access, On the one hand also give people who need to provide a train of thought, let everyone less detours. Here I also refer to some

This is how Android supports video formats: Android can decode JPG files. Video encoding and decoding in H.263 format, Only videos in h264 format can be decoded. Is the life cycle of the mediarecorder class A common case of using mediarecorder to record audio works as follows: Mediare

The previous article has introduced the Android interface of the introduction of the technology, I believe that everyone after reading and follow the practice, the common layout and view will have a certain understanding, and then no longer emphasize the introduction of the interface, but for the specific common features to unfold. This article will introduce the use of MediaPlayer. MediaPlayer can play audio