compress audio file android

it to output our sound effects and music. You only need to call this method once within the lifecycle of an activity. It is best to call it in the activity. oncreate () method. First, we need to distinguish between music streams and sound effects. The latter is generally stored in the memory and its length does not exceed several seconds. The Android system provides us with a soundpool class, which enables sound playback easily. You can initialize a

, intentfilter );Sendbroadcast (new intent (intent. action_media_mounted,Uri. parse ("file ://"+ Environment. getexternalstoragedirectory (). Getabsolutepath ())));}} Send broadcast information by clicking the button, and then scan the audio information through the broadcast service. The following is the broadcast service code: Package com. ZTE. broadcastreceivermediascanner; Import

Today, any smart phone can play audio. Of course, android-based devices are no exception. They allow you to create music players, audio books, podcasts, or any other applications that play around audio. In this article, we will discuss Android's functions in terms of format and decoder support, as well as several diffe

Li huaming himiOriginal, reprinted must be explicitly noted:Reprinted from[Heimi gamedev block]Link: http://www.himigame.com/android-game/312.html Many kids shoes say that after my code is run, clicking home or back will cause a program exception. If you have encountered this, you certainly haven't carefully read the himi blog, in article 19th, himi specifically wrote about the causes and solutions of these errors. I have added my remarks on this blo

Whether it is text, image or sound, must be organized and stored in a certain format, so that the player will know how to parse this piece of data, for example, for the original image data, our common format is YUV, Bitmap, and for audio, the simplest common format is the WAV format.WAV format, like bitmap, are Microsoft developed a file format specification, they all have a similarity, is the whole

longer through alsa. Tinymix can be viewed in a closed state, because all the Bluetooth protocols of Android4.2 are implemented at the user layer, and the uart channel is used directly. This design will be incomprehensible at half past one. 4. Use tinyplay to play wav music This is just the most basic player, so it does not support playing MP3 and other compressed formats of music. Before I learned how to use it, I said it was very troublesome on the Internet, but now it seems that it is not tr

AssetManager getAssets ()Added in API level 1 Retrieve underlying AssetManager storage for these resources.C. AssetManagerHttp://developer.android.com/reference/android/content/res/AssetManager.htmlD. AssetFileDescriptorHttp://developer.android.com/reference/android/content/res/AssetFileDescriptor.htmlE. SoundPoolHttp://developer.android.com/reference/android/me

binary binary. PCM represents the amplitude of a piece of audio in an audio file that passes over time. Android supports PCM audio data in WAV files.WAV fileWav,mp3 etc is our more common audio format, different encoding format f

, because the audio and video compression algorithm is not the same, since the compression algorithm is not the same, then certainly the decoding is not the same, so you need to first decode the audio and video respectively.Although audio and video are compressed separately, the compressed audio and video are bundled t

ObjectiveBefore writing the article "separate compilation using WEBRTC audio processing module-Android", I have been trying to compile the WEBRTC audio processing engine Voe the whole to use for his project, but limited to the poor technology, time is tight, so did not succeed. The AECM, AGC, NS, and VAD modules in the engine were compiled separately to make it w

bit rate too much,The screen effect is not obvious. While MKV is H.264 encoded and used for HD videos. The 1080p image rate reaches 30 Mbps.Of course, the formula for calculating files not compressed is different:Sound:, data volume (bit/second) = (sampling frequency (HZ) * sampling bit (BIT) * number of channels)The number of single-channel channels is 1, and the number of stereo channels is 2.Data size * time/8 = total file bytesFor example, CD is

IOS and Android audio Development Summary Recently, because the project needs to change the sound, it is not difficult to learn and Process audio. However, it is still tedious (more than expected) While my mind is still excited, I will summarize my thoughts and record them. This article mainly introduces three parts: 1. How to change VOICE 2,