I use ffmpeg to update metadata tags like this way:
ffmpeg -i "in.m4a" -acodec copy -metadata artist="artist text"
-metadata comment="comment text" "out.m4a"
Well, "artist text" and "comment text" is usual plain text, but comment field allows to put multiline text. Each line must have new line character to do it. Something like this:
-metadata comment="source: lastfm \r\n tags: tag1, tag2 \r\n ..."
But all characters that I use (\r\n, %nl%, ^N) bring no result.
I run ffmpeg.exe from PHP script on Windows using shell_exec() function
Someone help please, or tell me is it really possible?...
You can do this with PowerShell using the `n
for a newline and optionally
`r
for carriage return
ffmpeg -i in.m4a -metadata comment="hello`nworld" out.m4a
Windows default shell is cmd.exe
so you may need to invoke like this
powershell ffmpeg -i in.m4a -metadata comment="hello`nworld" out.m4a
Output
Output #0, ipod, to 'out.m4a': Metadata: major_brand : M4A minor_version : 512 compatible_brands: isomiso2 comment : hello : world encoder : Lavf55.1.100
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