How to pipe FLACs to fdkaac in ffmpeg and keep tags?

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How to pipe FLACs to fdkaac in ffmpeg and keep tags?

2017-02-17 03:18:35

I can convert FLAC files to m4as with the following command line, piping ffmpeg output to fdkacc, but the FLAC's ID3 tags get lost in the process.

Code: [Select]

ffmpeg.exe -i input.flac -f wav - | fdkaac.exe -I -p 29 -m 0  -G 2 - -o "%~n1.m4a"

What do I add to this command line to transfer the tags to the new m4a file -- hopefully without resorting to an intermediate text file?

Re: How to pipe FLACs to fdkaac in ffmpeg and keep tags?

Reply #1 – 2017-02-17 04:50:22

I don't know if it's possible with ffmpeg, but I believe Tag can transfer tags from one file to the other.

Re: How to pipe FLACs to fdkaac in ffmpeg and keep tags?

Reply #2 – 2017-02-17 06:23:21

Quote from: Wally Walters on 2017-02-17 03:18:35

I can convert FLAC files to m4as with the following command line, piping ffmpeg output to fdkacc, but the FLAC's ID3 tags get lost in the process.
Code: [Select]
ffmpeg.exe -i input.flac -f wav - | fdkaac.exe -I -p 29 -m 0  -G 2 - -o "%~n1.m4a"

Try -f caf instead of -f wav. fdkaac is able to read only CAF tags.

Re: How to pipe FLACs to fdkaac in ffmpeg and keep tags?

Reply #3 – 2017-02-17 07:48:24

That did it. Thank you.