amr

问题 I'm working in Python 3.6 under Linux Ubuntu and I used the Scapy lib to extract data from a bin file which contained the following stack: IP/UDP/RTP. The RTP-PAYLOAD TYPE is 107 (dynamic), a=rtpmap:107 AMR-WB/16000/1. I put it into a file in raw format and I called it src.aud , but it also wouldn't be a problem to put write it in hex. Now what do I have to do exactly to transform it into audio data format like .wav or .mp3 for example, which is on every computer? I've already made an' effort

问题 I'm working in Python 3.6 under Linux Ubuntu and I used the Scapy lib to extract data from a bin file which contained the following stack: IP/UDP/RTP. The RTP-PAYLOAD TYPE is 107 (dynamic), a=rtpmap:107 AMR-WB/16000/1. I put it into a file in raw format and I called it src.aud , but it also wouldn't be a problem to put write it in hex. Now what do I have to do exactly to transform it into audio data format like .wav or .mp3 for example, which is on every computer? I've already made an' effort

问题 I'd like to know how to record sound for a specific amount of time, without saving it to a file - holding in a byte stream for example. Also, if possible, make it look like an AMR file. I've tried to search google, and also wrote some code myself, but had no success. If you can link me to a page that explains how to do so, or give an example, it would be very nice of you :) Thanks. 回答1: MediaRecorder recorder = new MediaRecorder(); recorder.setAudioSource(MediaRecorder.AudioSource.MIC);

问题 So this is something I've been trying to get my head around when I was trying to load one of my older apps. There's a lot of threads where people are asking for the supported audio formats in iOS. And in most of them someone comments that support for AMR (Adaptive-Multi-Rate) was dropped in iOS 4.3. How do they know this? Supported Audio file formats in iPhone But I cannot find ANY api changes or anything about this in Apples official documentations. i.e the diffs between 4.2 and 4.3: https:/

问题 So this is something I've been trying to get my head around when I was trying to load one of my older apps. There's a lot of threads where people are asking for the supported audio formats in iOS. And in most of them someone comments that support for AMR (Adaptive-Multi-Rate) was dropped in iOS 4.3. How do they know this? Supported Audio file formats in iPhone But I cannot find ANY api changes or anything about this in Apples official documentations. i.e the diffs between 4.2 and 4.3: https:/

问题 I wrote an algorithm to extract each frame from an AMR file. I considered the first 6 bytes of the file to be the header and the following information is audio frames. Each audio frame is composed by frame header and audio data. Frame header tells the frame's size in bytes (using CMR Mode table - http://www.developer.nokia.com/Community/Wiki/AMR_format). The frame size is stored in the first byte of the frame -> second bit to 5-th bit, counting MSB as first bit. The algorithm does not work

问题 I ad using below code to download an AMR file from web and playing by AVAudioPlayer but all times I get the unrecongnize selector sent to instance error. This is the method that start download and play: - (IBAction)DisplayAudioPlayView:(id)sender { [self InitializePlayer]; } -(void) InitializePlayer { // Get the file path to the doa audio to play. NSString *filePath = [[ServerInteraction instance] getAudio:audioData.ID]; // Convert the file path to a URL. NSURL *fileURL = [[NSURL alloc]

问题 I have been trying to get .arm upload to a website built in codeigniter. I know its not a default mine type so I added it with this: 'amr' => 'audio/amr', but its doesnt seem to be working with that. I also added it to the allowed types. Any idea if amr can be supported and if so what may I be doing wrong? 回答1: You could try looking at system/libraries/Upload.php line 199: $this->_file_mime_type($_FILES[$field]); Change that line to $this->_file_mime_type($_FILES[$field]); var_dump($this-

问题 I'm trying to convert AMR audio files to MP3 using FFMPEG. I'm running on Ubuntu 10.10 with VBox on Windows 7 host and i've installed ffmpeg by running sudo apt-get install ffmpeg I already have an AMR file that i've previously recorded so I ran the command: ffmpeg -i myfile.amr myfile.mp3 the conversion failed and the trace is as follows: FFmpeg version 0.6-4:0.6-2ubuntu6, Copyright (c) 2000-2010 the FFmpeg developers built on Oct 5 2010 22:35:47 with gcc 4.4.5 configuration: --extra-version

问题 A voice recorder doesn't need uncompressed Linear PCM audio. Compressed AMR would do fine. The iPhone framework built for recording audio is simple enough, but the only examples I've found for setting up the audio format (which come from Apple) use LinearPCM. I've tried various other combinations of values, but can't seem to get anything to work. Does anybody have any code that actually records AMR ? Edit: The AMR format is one of the options for setting the data type, but the other options