Why does Avidemux not show (this) MP4 video correctly?

[thoste]

Have a look at this short mp4 sample video sequence:

https://filehorst.de/d/dijIsvem

I can play it with video players like VLC.

However when I load it (by drag &dr op) in Avidemux v2.7.8 in Windows its shows a mess (see attached snapshot).

Why?

You cannot view this attachment.

[eumagga0x2a]

Should be fixed by [demuxers/Mp4] Accept H.264 labeled as avc3.