Here is the ultimate workaround for Sony Vegas not playing Mirillis Action mp4 videos with the "Record microphone into separate track" setting enabled.
You will need FFMPEG.EXE and a .bat with this code:
for %%a in ("*.mp4") do ffmpeg -i "%%a" -c copy -map 0 "remux\%%~na.mp4"
pause
You can download ffmpeg bundled with the .bat here:
https://mega.nz/#!qMNAVC7L!0hjbS97V0p...
Watch video Ultimate Workaround for Mirillis Action mp4s not playing in Sony Vegas online, duration hours minute second in high quality that is uploaded to the channel Hej 14 March 2016. Share the link to the video on social media so that your subscribers and friends will also watch this video. This video clip has been viewed 771 times and liked it 9 visitors.