This tutorial will demonstrate how to disable a track in existing MP4 or MOV compatible file with AtomBox Studio solution and then how to enabling the track back.

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AtomBox Studio provides the ability to disable and to enable, previously disabled, media tracks. The function is useful, when investigating corrupted MP4/MOV files, which cause crashes or freezes in playback platforms. If the data corruption is on system/multiplex level it is possible to determine which of the tracks is causing problems during playback by disabling the tracks one by one.

1. Starting AtomBox Studio application and opening a MP4 media file.

All the tracks are located in the ‘moov’ atom/box on its root level. More information about each track type and parameters can be found on the right quick info panel.

2. To disable a track you need to select the track in the main tree-view and to select “Disable Track” either from the “Tools” menu or by right-clicking on the track and selecting the option from the pop-up menu.

The disabled track now appears in the ‘moov’ atom/box as a ‘free’ atom/box. The data in the ‘mdat’ atom/box is intact, but since there is no description available in the ‘moov’ atom/box.

3. The track can be enabled by selecting the previously disabled track atom and selecting “Enable Selected Atom/Box As Track” option either from the “Tools” menu or by right-clicking on the disabled track atom and selecting the option from the pop-up menu.

The atom/box is enabled back as a track along with all its internal sub atom/boxes.

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