m3u playlists exported from Apple Music cannot be read

[brackeen]

Apple Music exports playlists in m3u and m3u8 format with old mac newlines (\r) rather than windows (\r\n) or unix (\n) newlines. When opening these files, IINA shows an error dialog that reads "Cannot open file or stream!"

The logs show "[mpv][w] [cplayer] warn: Empty playlist!"

Workaround: use mac2unix to convert the file to use unix newlines.

System and IINA version:

• macOS 14.4.1
• IINA 1.3.4
• Apple Music 1.4.4.48

Expected behavior:
IINA reads m3u files exported from Apple Music without any conversion step.

Actual behavior:
m3u files must be converted before IINA can read them.

Steps to reproduce:

1. Export a playlist from Apple Music to m3u or m3u8 format. Or, convert an existing working m3u playlist using the unix2mac utility.
2. Open the playlist in IINA

[uiryuu]

Since parsing playlist is done by mpv, I think this should be resolved upstream. Please file an issue in mpv. If they don't want to do, maybe we can discuss what we can do later.