The Adaptive Multi-Rate audio codec or AMR for short is a patented audio data compression scheme optimized for speech coding.
Questions tagged [amr]
140 questions
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Playing Audio recorded on BlackBerry externally
I have a BB app that records and sends audio to a web service and is stored as a BLOB on my DB. I would like to know how I can play this audio from another source that isn't the BB player. I am able to save the audio data as a byte array on the BB…

8vius
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How can I write a program to dispart the audio and video track from .3gp file?
I want to write a program that dispart the audio and video track from .3gp file.
(The format of video track is h.263 and audio is AMR. The data is generated from Android.)
A lot of information had been surveyed from internet but I still can not…

Ray
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Can not play amr audio file in iOS
Trying play AMR audio file using this code:
var player: AVAudioPlayer? = nil
WebService.shared.download(self.dataSource.object(at: indexPath)) { data in
do {
try…

zzheads
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Convert amr to mp3 with ffmeg on ubuntu - Input/output error
I want to convert amr to mp3. I am following after this question:
AMR to MP3 conversion with FFMPEG
and typing:
ffmpeg -i example.amr -ar 22050 example.mp3
But output contains errors:
ffmpeg version 2.8.11-0ubuntu0.16.04.1 Copyright (c) 2000-2017…

Daniel
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Could an amr audio file bytes contains a `#` character?
I'm developing a socket communicate routine, and the messages delimiter is a single # character.
And the data sending may contain .amr audio files. I want to confirm whether the content of the file might contains the # delimiter character, which may…

Alfred Huang
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MediaException: Cannot create DataSoruce for capture://audio on Samsung
I'm writting midlet that captures audio on mobile.
System.getProperty("supports.audio.capture"); - returns true
Manager.getSupportedContentTypes("capture"); - returns "audio/amr"
My mobile is Samsung SGH-G800 and according to its spec supports…
0
votes
2 answers
How to convert audio.m4a to audio.amr on OS X?
I tried installing ffmpeg
$ brew install ffmpeg
and running ffmpeg
$ ffmpeg -i audio.m4a -ar 8000 -ab 12.2k audio.amr
I got the following error:
Automatic encoder selection failed for output stream #0:0. Default
encoder for format amr (codec…

Tylor Hess
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How to use opencore-amr on android nougat
My application is using AMR using opencoreamr-android. My wrapper includes calls which check AMR symbols and libstagefright (like libstagefright_soft_amrdec library) are present in the system.
However since android nougat i cannot access…

user1734654
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Duration of an amr audio file
i want to find the duration of an audio file of type "amr" without converting it to other audio formats
with any way?
AK

Antonis
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Is there an alternative to opencore amr to convert wav to amr on iOS?
I have a project that needs to send amr files to the server.
The only solution I found so far is a cocoapods library, a swift one, linked to different builds of opencore-amr library.
https://github.com/feuvan/opencore-amr-iOS
cocoapods:…

Mikael
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2 answers
Can't open received amr/jgp file from socket on android
To send and receive file via socket over Wifi I have used following code...
Client side :
Socket socket = new Socket(dstAddress, dstPort);
int bufferSize=socket.getReceiveBufferSize();
InputStream in=socket.getInputStream();
…

Shahed
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Parsing AMR-WB Codec bitstream
I am using the amr-wb+ codec provided by 3gpp.
On one of the websites for documentation, they were explaining how the raw bitsream file is parsed
http://www.3gpp.org/ftp/Specs/archive/26_series/26.290/26290-c00.zip
And this document which I'm…

user3772547
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iOS Deprecated Audio Format - AMR (Adaptive-Multi-Rate)
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…

ifMike
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Output of ARM-WB decoder - What is the format? and How to play it?
I downloaded the 3GPP AMR-WB codec (26.173) from http://www.3gpp.org/DynaReport/26173.htm and successfully compiled it. However, the file format generated from the decoder is some so-called binary synthesized speech file (*.out). I am wondering what…

Grassright
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1 answer
Android MediaCodec AMR-NB realtime decoding
I'm working on VoIP via a socket like API. (With a narrow band connection)
I need to encode each voice frame (20ms) and send via said api, then decode it on the other side.
I tried working with Opus through NDK but it wasn't going anywhere so I…

Eitan F
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