# \[X\] Handling of disc# / track# in MP4-file
**URL:** https://community.mp3tag.de/t/x-handling-of-disc-track-in-mp4-file/10365
**Category:** No Bugs
**Created:** [April 28, 2010, 3:40pm UTC](https://community.mp3tag.de/t/x-handling-of-disc-track-in-mp4-file/10365 "2010-04-28T15:40:35Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@Hamsen](https://community.mp3tag.de/u/Hamsen)
#### Post date: [April 28, 2010, 3:40pm UTC](https://community.mp3tag.de/t/x-handling-of-disc-track-in-mp4-file/10365/1 "2010-04-28T15:40:35Z")
If I enter 8/15 in the track field and 3/8 in the disknumber field, the values are correctly stored in the atoms.
But when I view the fields, only the track/disc# are displayed, not the "of" value.
Regards
Thomas
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### Author:  [@Florian](https://community.mp3tag.de/u/Florian)
#### Post date: [April 30, 2010, 4:07am UTC](https://community.mp3tag.de/t/x-handling-of-disc-track-in-mp4-file/10365/2 "2010-04-30T04:07:55Z")
The total tracks number is stored in the TOTALTRACKS field. MP4 tags have a dedicated field for this number since the actual track number field is numeric only.
Kind regards,
Florian
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### Author:  [@Hamsen](https://community.mp3tag.de/u/Hamsen)
#### Post date: [April 30, 2010, 6:07am UTC](https://community.mp3tag.de/t/x-handling-of-disc-track-in-mp4-file/10365/3 "2010-04-30T06:07:30Z")
I suppose you mean that this dedicated field is the same as the last part of the "trck" atom.
My point was, that if you can enter the value "8/15" in the numeric track field and get it stored correctly in the "trck" atom, the same could be done in the opposite direction.
If totaltracks=0 then display only the track#, if not show track#/totaltracks.
Regards
Thomas
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### Author:  [@Florian](https://community.mp3tag.de/u/Florian)
#### Post date: [December 28, 2018, 2:29pm UTC](https://community.mp3tag.de/t/x-handling-of-disc-track-in-mp4-file/10365/4 "2018-12-28T14:29:50Z")
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