When I add a subtitle file, I provide a custom handler name so that I can identify the track in case I need to extract the data in the future. The issue I have is that -info as in 

_gpac-1.0.1-rev0-gd8538e8a-master-x64>mp4box -info test.mp4_
Provides this info for the track

Track # 6 Info - TrackID 6 - TimeScale 1000
Media Duration 00:04:08.999 - Indicated Duration 00:04:08.999
Media Info: Language "English (eng)" - Type "sbtl:tx3g" - 359 samples
Unknown Text Stream
 Size 2704 x 1520 - Translation X=0 Y=0 - Layer 0
        RFC6381 Codec Parameters: tx3g
        All samples are sync
        Max sample duration: 69001 / 1000

Whereas 
_gpac-1.0.1-rev0-gd8538e8a-master-x64>mp4box -info 6 test.mp4_
Provides this info for the track

Track # 6 Info - TrackID 6 - TimeScale 1000
Media Duration 00:04:08.999 - Indicated Duration 00:04:08.999
Media Info: Language "English (eng)" - Type "sbtl:tx3g" - 359 samples
Handler name: MyCustomHandler
Unknown Text Stream
 Size 2704 x 1520 - Translation X=0 Y=0 - Layer 0
        RFC6381 Codec Parameters: tx3g
        All samples are sync
        Max sample duration: 69001 / 1000

So the question is, is it possible to add the handler name for all tracks to the general -info option or can we make the 'Unknown Text Stream' a known custom stream somehow?
handler name not displayed with -info
This is a GitHub Issue
repo:gpac
owner:gpac
Title : handler name not displayed with -info
Issue date:

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When I add a subtitle file, I provide a custom handler name so that I can identify the track in case I need to extract the data in the future. The issue I have is that -info as in 

_gpac-1.0.1-rev0-gd8538e8a-master-x64>mp4box -info test.mp4_
Provides this info for the track

Track # 6 Info - TrackID 6 - TimeScale 1000
Media Duration 00:04:08.999 - Indicated Duration 00:04:08.999
Media Info: Language "English (eng)" - Type "sbtl:tx3g" - 359 samples
Unknown Text Stream
 Size 2704 x 1520 - Translation X=0 Y=0 - Layer 0
        RFC6381 Codec Parameters: tx3g
        All samples are sync
        Max sample duration: 69001 / 1000

Whereas 
_gpac-1.0.1-rev0-gd8538e8a-master-x64>mp4box -info 6 test.mp4_
Provides this info for the track

Track # 6 Info - TrackID 6 - TimeScale 1000
Media Duration 00:04:08.999 - Indicated Duration 00:04:08.999
Media Info: Language "English (eng)" - Type "sbtl:tx3g" - 359 samples
Handler name: MyCustomHandler
Unknown Text Stream
 Size 2704 x 1520 - Translation X=0 Y=0 - Layer 0
        RFC6381 Codec Parameters: tx3g
        All samples are sync
        Max sample duration: 69001 / 1000

So the question is, is it possible to add the handler name for all tracks to the general -info option or can we make the 'Unknown Text Stream' a known custom stream somehow?
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