Error analyzing mp3 file with chapters: "Caught exception: Undefined array key 1"

[yassinedoghri]

When analyzing an mp3 file with chapters, I get the following error:
The returned data from the analyze function is missing a chunk of the info, such as mime_type, avdataoffset, ...

Steps to reproduce

1. Download the following mp3: https://www.buzzsprout.com/1529720/6705454-cc-1-introductions.mp3
2. Analyze it using the $getID3->analyze($file) method.
3. Dump result and see error with missing data.

Expected behavior

The returned data from the analyze method should include all of the expected data.

Relevant logs and/or screenshots

What is returned:

What should be returned:

Context

• getID3: v2.0.0-beta4
• PHP v8.0.13

Possible fixes

With some brute force var_dumps, I was able to pinpoint the issue to this line, just after the WXXX case:

// v1.9 - getid3/module.tag.id3v2.php - line 2067
// v2 - src/Module/Tag/ID3v2.php - line 2066
list($subframe['chapter_url_description'], $subframe['chapter_url']) = explode("\x00", $encoding_converted_text, 2);

👉 Apparently, the $encoding_converted_text doesn't include the chapter_url so the index 1 doesn't exist in the array created from the explode().

Naively, this fixes it:

$encoding_converted_text_array = explode("\x00", $encoding_converted_text, 2);
$subframe['chapter_url_description'] = $encoding_converted_text_array[0];
$subframe['chapter_url'] = isset($encoding_converted_text_array[1]) ? $encoding_converted_text_array[1] : '';

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That being said, thanks for your hard work, getID3 is amazing 🙂

[JamesHeinrich]

You correctly traced the source of the problem. Even more naively, error-suppressing the list will fix it:
@list($subframe['chapter_url_description'], $subframe['chapter_url']) = explode("\x00", $encoding_converted_text, 2);
Which is how I have fixed it in a99e0a2

[StudioMaX]

I backported this fix to 2.0 in #356.
Please require james-heinrich/getid3:^2.0-dev if you need so in your composer.json until the new version is released.

[yassinedoghri]

Awesome, thank you both!