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Questions tagged [m4a]

M4A stands for MPEG 4 Audio, it is a filename extension used to represent audio files.

M4A stands for MPEG 4 Audio which is an audio-only MPEG-4 file. Audio-only MPEG-4 files generally have a .m4a filename extension. This is especially true of non-protected content (which often uses the file extension .m4p). MPEG-4 files with both audio and video generally use the standard .mp4 extension.

More details about MP4 file format( container format of all .m4a files) is at http://en.wikipedia.org/wiki/MPEG-4_Part_14

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What is the difference between M4A and AAC Audio Files?

Is there any difference between M4A audio files and AAC audio files or are they exactly the same thing but with a different file extension?
alexandertr
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m4a mp4 file format what's the difference or are they the same?

I've looked and can't seem to find a concrete answer. My client wants to play sound clips on his website, currently he has over 2000 clips which are in m4a format. A lot of the audio players I have looked at say they support mp4 but no mention of…
Dizzy Bryan High
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What is the easiest way to wrap a raw .aac file into a .m4a container

This question is overflow from the following question: How do I programmatically convert mp3 to an itunes-playable aac/m4a file? Anyway, I learned how to create an aac file and then i found out that an aac is not just an m4a file with a different…
kwork
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Streaming AAC audio with Android

As I understand it, Android will only play AAC format audio if it's encoded as MPEG-4 or 3GPP. I'm able to play AAC audio encoded as M4A when it's local to the app, but it fails when obtaining it from a server. The following works, as the m4a file…
bdls
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Merge M4A files in Terminal

I have a couple of M4A (sound) files on a Mac that I want to combine into a single sound file. Can this be done with a Terminal command? Is there such a thing?
Hahnemann
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FFmpeg, how to embed cover art (image) to .m4a

Is there any way to embed cover art to m4a files? This one works well for mp3 but doesn't work for m4a ffmpeg -i tests/in.m4a -i cover.jpg -map 0:0 -map 1:0 -acodec copy \ -id3v2_version 3 tests/out.m4a
Yaroslav
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how to load m4a file in python

Is there an easy way to load m4a sound file in python. I've came across audiotools lib but I'm getting an error while using to_pcm…
Ehab AlBadawy
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abstracting the conversion between id3 tags, m4a tags, flac tags

I'm looking for a resource in python or bash that will make it easy to take, for example, mp3 file X and m4a file Y and say "copy X's tags to Y". Python's "mutagen" module is great for manupulating tags in general, but there's no abstract concept of…
Nails N.
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ID3 tags with Swift

I'm looking for a way to modify ID3 tags with Swift. More specifically, I want to write the Album Art image to an mp3/m4a file. A Swift library would be the best, but I'll take anything that can be done natively in Swift. I don't want to rely on…
LaX
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Unable to convert .mp3 to .m4a using ffmpeg

I am fully aware the legal constraints in using libfaac but this is just for my testing purpose. I have compiled ffmpeg with faac enabled. So when I tried to convert an .mp3 to a .m4a here is the error that I am getting. Please provide a resolution…
rahulg
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Audio format where silence would not affect file size

I'm looking for an audio format where a silence of a couple of hours at the beginning does not affect the overall file size. Has anyone any idea which one to use and what settings I have to use? I tried m4a, ogg and mp3 so far with no luck. An audio…
Benjamin Paap
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AVAudioRecorder does not create .m4a files that can be opened and played

I am trying to modify an iOS app that can send audio files (securely/encrypted) to other iOS devices. It uses AVAudioRecorder to record the audio files, and it uses AVAudioPlayer to play back any received audio files. I am now trying to modify the…
mahboudz
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How can I get AAC encoding with ExtAudioFile on iOS to work?

I need to convert a WAVE file into an AAC encoded M4A file on iOS. I'm aware that AAC encoding is not supported on older devices or in the simulator. I'm testing that before I run the code. But I still can't get it to work. I looked into Apple's…
Sebastian
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Extract audio from webm video into m4a audio files

Can I use ffmpeg or another command-line tool (I recently downloaded mkvtoolnix for example) to directly extract audio into m4a files from webm videos? I've previously been doing this 2-step process: ffmpeg -i input.webm temp.mp4 ffmpeg -i temp. mp4…
theonlygusti
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Retrieve ID3 info from m4a file in PHP

I've written some PHP code to pull out ID3 tags from mp3 files. The next step is to do the same with .m4a files. From the research I've done it looks like most m4a files do not use ID3 but instead a format using 'atoms'. Are there any PHP…
Nick
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