I encountered a problem when muxing audio and video streams into .mp4 using GPAC MP4Box, the command is like this:
MP4Box -add Sony_BabyAndToy_1920x1080_25.265 -add BabyAndToy_1920x1080_25_3Mbps.mp3 -fps 25 -new Sony_BabyAndToy_1920x1080_25.mp4
which, incurred an MP4Box error:
Unknown input file type
Unknown input file type
My platform is x86_64 windows7. I learnt from Doom9 [1] that this was possibly introduced by an GPAC x64 release bug, so i turned to linux, it directly went ok!
Another problem looks like this:
Error importing xxx.h265 Corrupted Data in file/stream
this is caused by the incorrect extension name - .h265. Change to .265 and have a try!
Good luck!
[1] http://forum.doom9.org/showthread.php?p=1651771