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Questions tagged [ima4]

8 questions
10
votes
2 answers

Decoding ima4 audio format

To reduce the download size of an iPhone application I'm compressing some audio files. Specifically I'm using afconvert on the command line to change .wav format to .caf format w/ ima4 compression. I've read this (wooji-juice.com) awesome post…
MrDatabase
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How can I convert an Apple IMA4 CAF file recorded with AVAudioRecorder to a WAV file using Core Audio Converter Services?

Note: I am an audio noob, so please forgive me if I say the wrong thing! I need to convert Apple IMA4 CAF audio files recorded with AVAudioRecorder to WAV files from within my app. The sample rate needs to be retained. My app needs to support 3.x,…
user1092719
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3
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0 answers

create a wav header for ADPCM recorded data on iPhone

My requirement is to create a .wav file, and I had an existing code with ADPCM encoder already written. It was getting data in linear PCM and converting it to ADPCM and creating a wave header for the file. Now, I have modified the code, and I am…
user579951
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0
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1 answer

Playing back an ima4 file

I am looking to record voice in as compact a file format as possible for an ipad app, and not concerned about sound quality. I chose the ima4 format but don't really know much about audio, so am having trouble figuring out how to play back the…
Joey
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0
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2 answers

Recording Mono on iPhone in IMA4 format

I'm using the SpeakHear sample app on Apple's developer site to create an audio recording app. I'm attempting to record directly to IMA4 format using the kAudioFormatAppleIMA4 system constant. This is listed as one of the usable formats, but every…
mag725
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How to use apple ima4 file in android?

I have iOS code and folder contains .ima files for sound, it is game that using openAL in playing sound but I don't have experience in iOS, I want to use these .ima files in android how can I use them or even convert them to mp3 and use them?
Sara Elmoghazy
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Is kAudioFormatDVIIntelIMA actually supported on iOS?

According to the iOS Technology Overview the DVI/Intel IMA ADPCM format is supposedly supported. Specifically, there is a section that indicates: iOS supports many industry-standard and Apple-specific audio formats, including the following: AAC …
Kicks
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1 answer

How to play .ima4 audio file in website

I have recently created an iPhone app where i recorded voice in .ima4 format. This application uploads these recordings to my web server, where user can play these recorded files. But i don't know how to decode or play .ima4 files in a website.
Irfan DANISH
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