Thanks for the comments.
I'm suspecting the issue of arc not working properly may be because I have several other programs that also have the arc.exe included. So when I attempt to run the arc command, the command may be selecting another location of arc.exe and not the arc.exe within the Freearc directory.
Presently trying to remove paths to the other programs containing arc.exe and see how things go. And trying to run arc.exe from the current working directory of Freearc\bin.
EDIT: I managed to get Arc.exe working with methods by copying Arc.exe and Arc.ini and srep to the current working directory which contained the test mp4 file.
The initial problem of Arc not working properly was most likely due to the presence of multiple copies of Arc.exe and Arc.ini within several other programs which were causing conflicts with each other.
EDIT2: Did some compression tests on 70 MP4 files ranging in size from 547 kB to 11,351 kB.
Code:
Compressor Commands/Options Compressed Size Compression Time
Original 70 files - - - - - - > 171,978,453
srep -m3f -a2 157,392,930 1.979
mcm -x13 156,938,895 296.611
nz a -co -m4g 156,859,691 20.767
nz a -cO -m4g 156,823,772 25.322
nz a -cc -m4g 156,766,025 171.793
lolzslow as per arc.ini 156,693,448 207.330
arc a -m=razorx 156,681,739 87.046
fp8 v6 -8 156,625,221 1038.185
lolz per arc.ini + lm4 156,546,454 318.421
lolzslow per arc.ini + lm4 154,768,632 320.855
NOTE: for compression options using lm4 for files, files fail to decompress! Do not use lm4 option!
There is not a great difference in final compressed file sizes regardless of compression method.
Not really the best ideal final compressed sizes, but MP4 files are difficult to compress.