aac

摘要： 媒体处理创建消息主题出现“Only one topic can be created!”错误 目前媒体处理每个用户只能开一个管道，无法创建多管道，所以会出现Only one topic can be created!这个错误。 媒体处理创建消息主题出现“Only one topic can be created!”错误 目前媒体处理每个用户只能开一个管道，无法创建多管道，所以会出现Only one topic can be created!这个错误。 如果问题还未能解决，请联系 售后技术支持 。 媒体处理服务中AliyunAudioCodec中Profile字段的含义 媒体处理中的音频编解码配置类型中支持以下五种profile： MPEG-4 AAC LC (default) MPEG-4 HE-AAC (SBR) MPEG-4 HE-AAC v2 (SBR+PS) MPEG-4 AAC LD MPEG-4 AAC ELD 兼容性：LC-AAC > HE-AAC > HE-AAC v2压缩率：HE-AAC v2 > HE-AAC > LC-AAC LD跟ELD主要用于广播等快速编码场景。 SBR：Spectral Band Replication（频段复制），SBR把频谱切割开来，低频单独编码保存主要成分，高频单独放大编码保存音质。 PS：Parametric Stereo

I have built ffmpeg 0.8.12 (love) with the android NDK (r8c) on ubuntu. I then use the generated library in another android application through JNI. Essentially what I want to do is pass a byte stream from java to my c jni function and use ffmpeg to decode it into a PCM audio buffer which will then be passed back to java to be played using Android's AudioTrack. I can successfully pass the buffer through to jni (have checked the values) and ffmpeg seems to initialise correctly, but when it tries to decode the first frame, it throws an error in the aac_decode_frame_int method in aacdec.c

I am working on audio recording. I am able to record my audio in caf (Core audio format).i followed this tutorial Recording Audio on an iPhone with AVAudioRecorder . Now I don't want to record sound in .aac format directly, I need to convert recorded .caf audio file into .aac audio file... any idea how to do this? #import <UIKit/UIKit.h> #import <AVFoundation/AVFoundation.h> @interface recordViewController : UIViewController <AVAudioRecorderDelegate, AVAudioPlayerDelegate> { AVAudioRecorder *audioRecorder; AVAudioPlayer *audioPlayer; UIButton *playButton; UIButton *recordButton; UIButton