I've been using avidemux 2.6.7 on Windows. Recently my antivirus scan quarantined two dlls from avidemux:
libpng15-15.dll
libstdc++-6.dll
These were identified as Trojan.Agent.ED.
By whom ? Please try this and report: http://virusscan.jotti.org
It was detected by Malwarebytes. I have sent the files to them to determine whether this is legit or a false positive.
Sorry, this was probably a false alarm. http://virusscan.jotti.org didn't find any issues with those files.