**Info:**
MP4Box - GPAC version 0.5.2
Ubuntu 20.04

**Problem:**
I have .h264 video files which i need to convert to .mp4.
This works perfectly fine on test files that have no special characters in their names.
Working command: `MP4Box -add ./static/video/myfile.h264 ./static/video/test.mp4`

Now my production files have a different file name which contains the date and time of creation
separated by "-" "@" ":" and "/" characters. MP4Box can't work with them i guess because of the file name.

The files are fully intact and not corrupted or anything. If i change file name to something without the 
special characters it works fine.

The following command does not work: 
`MP4Box -add ./static/video/2021-05-10_11:20:03.h264  ./static/video/2021-05-10_11:20:03.mp4`
```
[Importer] Unknown input file type for "./static/video/2021-05-10_11:20"
Error importing ./static/video/2021-05-10_11:20:03.h264: Requested URL is not valid or cannot be found
```

I can tell that in the first line of the error message the file name gets cut off. I don't know if this could give a hint to the solution of the problem.

Using the same file names works perfectly with tools like FFmpeg etc. I can't really tell if my file names are too long for MP4Box or if MP4Box doesn't like special chars in file names.

Thanks
Unknown input file type; Special chars in file name
This is a GitHub Issue
repo:gpac
owner:gpac
Title : Unknown input file type; Special chars in file name
Issue date:

--- start body ---
**Info:**
MP4Box - GPAC version 0.5.2
Ubuntu 20.04

**Problem:**
I have .h264 video files which i need to convert to .mp4.
This works perfectly fine on test files that have no special characters in their names.
Working command: `MP4Box -add ./static/video/myfile.h264 ./static/video/test.mp4`

Now my production files have a different file name which contains the date and time of creation
separated by "-" "@" ":" and "/" characters. MP4Box can't work with them i guess because of the file name.

The files are fully intact and not corrupted or anything. If i change file name to something without the 
special characters it works fine.

The following command does not work: 
`MP4Box -add ./static/video/2021-05-10_11:20:03.h264  ./static/video/2021-05-10_11:20:03.mp4`
```
[Importer] Unknown input file type for "./static/video/2021-05-10_11:20"
Error importing ./static/video/2021-05-10_11:20:03.h264: Requested URL is not valid or cannot be found
```

I can tell that in the first line of the error message the file name gets cut off. I don't know if this could give a hint to the solution of the problem.

Using the same file names works perfectly with tools like FFmpeg etc. I can't really tell if my file names are too long for MP4Box or if MP4Box doesn't like special chars in file names.

Thanks
--- end body ---
