# File duration requires 64-bit atom structures

**URL:** <https://community.wowza.com/t/file-duration-requires-64-bit-atom-structures/42026>\
**Category:** Wowza Streaming Engine\
**Created:** [November 30, 2015, 11:07am UTC](https://community.wowza.com/t/file-duration-requires-64-bit-atom-structures/42026 "2015-11-30T11:07:23Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![Nineesh\_K\_Dasan](https://avatars.discourse-cdn.com/v4/letter/n/bbce88/32.png) [@Nineesh\_K\_Dasan](https://community.wowza.com/u/Nineesh_K_Dasan)\
**Post date:** [November 30, 2015, 11:07am UTC](https://community.wowza.com/t/file-duration-requires-64-bit-atom-structures/42026/1 "2015-11-30T11:07:23Z")

</div>

Hi,

wowzastreamingengine\_error.log file is getting filled by messages,

```auto
WARN server comment 2015-11-30 05:26:49 - - - - - 1845.614 - - - - - - - - QTWriterUtils.writeMOOVAtom[/var/storage1/camera_4/4_20151130045658233253_1342.mp4]: File duration requires 64-bit atom structures. File may not play properly in QuickTime for Windows.
WARN server comment 2015-11-30 05:26:50    

```

This happened after updated to version [4.3.0.01](https://www.wowza.com/downloads/user/565bdd1213dd0/WowzaStreamingEngine-Update-4.3.0.01.zip)

What is wrong with?

Regards,

Nineesh

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**Author:** ![Paul\_Shields](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/paul_shields/32/390_2.png) [@Paul\_Shields](https://community.wowza.com/u/Paul_Shields)\
**Post date:** [December 1, 2015, 1:34pm UTC](https://community.wowza.com/t/file-duration-requires-64-bit-atom-structures/42026/2 "2015-12-01T13:34:17Z")

</div>

Hi,

This message is indicating that the duration of the file is so long that it won’t fit into a 32-bit integer, which is used in version 0 of some of the MP4 atoms to store the duration. Therefore we have to use version 1 of those atoms which supports 64 bit durations.

However, some versions of QuickTime for windows do not support version 1 atoms, which is what this message is warning about. Unless you try to play the file in certain releases of QuickTime on Windows then you can ignore this message.

Paul

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<div class="post-metadata">

**Author:** ![Nineesh\_K\_Dasan](https://avatars.discourse-cdn.com/v4/letter/n/bbce88/32.png) [@Nineesh\_K\_Dasan](https://community.wowza.com/u/Nineesh_K_Dasan)\
**Post date:** [December 2, 2015, 10:16am UTC](https://community.wowza.com/t/file-duration-requires-64-bit-atom-structures/42026/3 "2015-12-02T10:16:39Z")

</div>

Hello Paul,

Thank you for the information.

However is it possible to stop writing these messages into log files?

Nineesh

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<div class="post-metadata">

**Author:** ![Nineesh\_K\_Dasan](https://avatars.discourse-cdn.com/v4/letter/n/bbce88/32.png) [@Nineesh\_K\_Dasan](https://community.wowza.com/u/Nineesh_K_Dasan)\
**Post date:** [December 15, 2015, 10:31am UTC](https://community.wowza.com/t/file-duration-requires-64-bit-atom-structures/42026/4 "2015-12-15T10:31:38Z")

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Hello Michelle,

Thank you for the information. Now I understand !

Regards,

Nineesh

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<div class="post-metadata">

**Author:** ![Michelle\_B](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/michelle_b/32/394_2.png) [@Michelle\_B](https://community.wowza.com/u/Michelle_B)\
**Post date:** [December 10, 2015, 4:17pm UTC](https://community.wowza.com/t/file-duration-requires-64-bit-atom-structures/42026/5 "2015-12-10T16:17:25Z")

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Hi Nineesh,

These lines are only informational, and you can safely ignore them. However, you can opt to shorten the segmentDuration for your livestream recordings so that the duration can be recorded to version 0 of the MP4 atom.

Michelle