# \[X\] Auto-numbering wizard not working properly with mp4

**URL:** https://community.mp3tag.de/t/x-auto-numbering-wizard-not-working-properly-with-mp4/13973
**Category:** No Bugs
**Created:** [October 6, 2012, 3:18pm UTC](https://community.mp3tag.de/t/x-auto-numbering-wizard-not-working-properly-with-mp4/13973 "2012-10-06T15:18:07Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![r-kane](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/r/5fc32e/32.png) [@r-kane](https://community.mp3tag.de/u/r-kane)
#### Post date: [October 6, 2012, 3:18pm UTC](https://community.mp3tag.de/t/x-auto-numbering-wizard-not-working-properly-with-mp4/13973/1 "2012-10-06T15:18:07Z")

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Hello there,

I found a low priority issue with v2.52 when using the numbering wizard (CTRL+K) with mp4 files. No leading zeros are entered when numbering over 10 tracks at once. It works fine with mp3 (and flac I think).

Steps for reproducing:

1. Mark at least 10 mp4 files
2. Press CTRL+K to start the auto-numbering wizard
3. Settings: Begin at tracknumber 1, DISABLE Save total count of tracks, ENABLE Leading zeros for tracknumbers, ENABLE Reset counte rfor each directory
4. Press OK

What it does: auto-numbers tracks as 1, 2, ..., 10, 11, ...

What it should do: auto-number tracks as 01, 02, ..., 10, 11, ...

Additional info: Converted wav with LameXP and Nero AAC codec from [this site](http://www.nero.com/eng/technologies-aac-codec.html).

Edit: Hmm... Maybe I was too fast... does mp4 support leading zeros anyway?

Edit 2: My bad... found a thread where this "problem" was discussed before. Should have done that before -.- sorry for this and please delete 🙂 Then I just rename the files with "%discnumber%x$ifgreater(%track%,9,%track%,0%track%). %title%" and I'm fine.

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### Author: ![dano](https://community.mp3tag.de/user_avatar/community.mp3tag.de/dano/32/6_2.png) [@dano](https://community.mp3tag.de/u/dano)
#### Post date: [October 6, 2012, 4:42pm UTC](https://community.mp3tag.de/t/x-auto-numbering-wizard-not-working-properly-with-mp4/13973/2 "2012-10-06T16:42:41Z")

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mp4 doesn't support leading zeroes.  
There's also a function that pads with zeroes: $num(%track%,2)

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### Author: ![Florian](https://community.mp3tag.de/user_avatar/community.mp3tag.de/florian/32/5759_2.png) [@Florian](https://community.mp3tag.de/u/Florian)
#### Post date: [December 28, 2018, 2:32pm UTC](https://community.mp3tag.de/t/x-auto-numbering-wizard-not-working-properly-with-mp4/13973/3 "2018-12-28T14:32:16Z")

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