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Questions tagged [m4a]

48 questions
145
votes
7 answers

FFmpeg: Convert m4a to mp3 without significant loss

I have a load of audio files (about 1000) which I want to convert from m4a to mp3 so I can use play them on a CD player which has a USB port. I tried doing something simple like: ffmpeg -i FILE.m4a FILE.mp3 but this seems to reduce the bitrate to a…
user3728501
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60
votes
8 answers

How to decode AAC (.m4a) audio files into WAV?

How would you convert (decode) AAC files into WAV format? (Or, if you prefer, how to decode & re-encode them into MP3 or Ogg Vorbis? But WAV is sufficient as I already have good tools for WAV ➔ MP3/Ogg conversion.) I'm mostly interested in Mac or…
Jonik
  • 5,940
18
votes
6 answers

MP3 vs M4A (AAC): what is the audio codec for portable devices which gives maximum independence?

A couple of years back MP3 was the most supported format for portable devices. Then Apple came along and wiped the floor of all the portable devices with the iPod as well as the iPhone. They clearly favour M4A (AAC). When to choose, right now, the…
akira
  • 63,447
12
votes
5 answers

What kind of metadata can be stored in m4a files?

I have a collection of voice recordings from my Android phone, all stored in .m4a files. I would like to know the date of the recording, but the file timestamps have all been set to the date at which I extracted the files from the phone. When I play…
jl6
  • 1,205
10
votes
2 answers

How to increase the volume in an m4a file?

I have an m4a file. When listening to it on my iPod Touch, the volume is too low, even when I turn it all the way up. I need to increase the volume in the file so that I can hear what is being said. Also, in the background it sounds like there is…
Phenom
  • 6,767
10
votes
1 answer

Convert m4a to aac without quality loss?

I wanna use a program on an .m4a file, but the program can't handle .m4a. It can handle .aac, however, and the codec of the file is MPEG-4 AAC. Is there a way to convert to .aac (and preferably converting back) without reencoding? (Alternative…
H.v.M.
  • 577
6
votes
8 answers

Play Apple Lossless (.m4a, ALAC) files in Windows 7 Media Player?

Is there a good plugin or codec that allows Media Player/Media Center on Windows 7 to play Apple Lossless (ALAC) encoded files? As the files are shared between multiple iTunes installations and one Media Center I don't want to transcode them. Bonus…
deceze
  • 1,015
5
votes
1 answer

convert mp3 audio to aac m4a audio

It may be easy, but I'm new to ffmpeg and struggle with converting an mp3 audio to an aac audio file with .m4a file extension using ffmpeg on the command line (Win10). input: Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s desired output:…
Rumpl
  • 153
5
votes
0 answers

Check for damaged file mp3, m4a (aac) in Linux

I have around 15,000 music files stored on Ubuntu server (16.04), around 50% FLAC, 25% each mp3 and m4a (aac). I think maybe 3-5% are corrupted due to HDD hardware failure. The problems accumulated gradually for some time before I noticed. Files are…
BobM
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4
votes
2 answers

Mixed results writing M4A metadata

Given this file: youtube-dl -f 140 -o in.m4a --fixup warn https://youtube.com/watch?v=j-70HbaR4g4 I am having mixed results writing metadata. For example these commands: ffmpeg -i in.m4a -c copy in.mp4 ffmpeg -i in.mp4 -c copy good.aac ffmpeg -i…
Zombo
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4
votes
1 answer

FFmpeg corrupts M4A files

I am trying to create M4A files to play in my car, which has a USB interface. This file works fine as is. However if I remux the file using: ffmpeg -i Miaow-02-Hidden.m4a -c copy outfile.m4a It will no longer play in my car.
Zombo
  • 1
3
votes
4 answers

Can FFmpeg convert mp3 files into m4a in full, i.e. with both audio and video streams (jpeg cover) copied?

I use Zeranoe build of FFmpeg. It converts mp3 files into m4a files just fine, as far as the audio stream is concerned, but I can't figure out a way to keep the songs album cover jpeg, which ffmpeg for some reason recognizes as Stream #0:1: Video:…
USIKPA
  • 61
3
votes
2 answers

How to extract the audo track from an m4a file?

I've got an m4a video file and would like to extract the sound. How can I do that? Running Arch Linux.
Anonymous Coward
  • 33
3
votes
2 answers

How to enable MP3, M4a support for Amarok?

How to enable MP3, M4A support for Amarok? I am using the following: Amarok Version 2.0.1 KDE 4.1.3 openSUSE 11.1
Aaron
  • 1,488
3
votes
2 answers

Media monkey doesn't play m4a

I have a number of songs on my Windows computer that were copied over from Ubuntu. My mp3's work fine in Media Monkey, but none of my m4a's do. As I guess I believe that it might have something do with incorrect tagging. Is there any program that…
Casebash
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1
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