0
votes
0answers
42 views

ffmpeg -concat slowing down AAC audio files

I am concatenating six m4a files with this command ffmpeg -f concat -i audiofiles.txt -c copy all_audio_edited.m4a each file has a duration of 4 hours (24 in total) but the concatenation doesn't ...
1
vote
0answers
112 views

Mixed results writing M4A metadata

Given this file I am having mixed results writing metadata. For example this command ffmpeg -i confetti.mp4 -c copy -f adts - | ffmpeg -i - -c copy -bsf aac_adtstoasc -movflags faststart \ ...
2
votes
1answer
3k views

FFMPEG: Convert m4a files to mp3 without significant loss of information / quality. Automated bitrate

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 ...
4
votes
1answer
369 views

FFmpeg corrupts iTunes files

I am trying to create .m4a files to play in my car, which has a USB interface. Files downloaded from this website work fine as is. However for example if I remux them using ffmpeg -i infile.m4a -c ...
1
vote
1answer
855 views

How to merge an image into an audio file?

I am trying to merge a thumbnail-size (104x80) image into an audio file (M4A). I want it to be played in JW Player, but it doesn't seem to support thumbnails. I have tried it in VLC Player, but the ...
3
votes
1answer
2k views

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 ...
1
vote
3answers
515 views

Why is my ogg bigger than my m4a?

I am using the following commands to encode an audio file to m4a & ogg formats: ffmpeg.exe -i 0123456789 -ab 192k out.m4a ffmpeg.exe -i 0123456789 -f wav - | oggenc2.exe - -r -q 6 -o out.ogg ...