MPEG-2 files without audio can't be opened

[schach]

When trying to open MPEG-2 files without an audio track, they can't be opened with Avidemux. I get an error window: "Cannot find a demuxer for file"

I've uploaded a test file without an audio track, so you can test it yourself:
mpeg2withoutaudio.mpg

[mean]

It is mpeg ES, unsupported