https://we.tl/t-b7RL9ldQZK 10 seconds Sample AVI file
I can open video and audio in VirtualDub but in Vegas Pro 19.0 I can only import Video and not Audio.
A few pieces of information about the AVI file, it's recorded in Mirillis Action! and it uses the FIVC codec which you can get by installing their software on a PC like Action!, or other product that contains that codec (there is a video player called Mirillis Splash, I think it's free too but I don't usually need to install another player myself with Action already installed).
If you can't open video in Vegas then you must have not installed Action correctly (or just missing software that comes with a codec that decodes video, installing Action! or Splash fixes that) for the codec to decode video which I had a problem recently with it, but that's due to the nature of the windows 10 account, mine is usually regular with no admin access, I usually use a password to get around with installations that, etc. but apparently that was an issue with Mirillis Action so I had to reinstall it while logged in administrator account instead and that fixed it for me, most people wouldn't even have an issue if they are already admin type windows account.
In past, I always had an issue even with past versions of Vegas Pro to import both video and audio, the only solution for that was to extract audio out (which you can do in VirtualDub OR just use ffmpeg -i "Filename.avi" -vn -c:a copy output.wav command), here is where my confusion comes in, while the video is encoded in proprietary codec FIVC, audio appears not to be, in MediaInfo, it tells me it's just regular PCM format, with codec ID "00000001-0000-0010-8000-00AA00389B71".
Also when I used mentioned command to extract in FFmpeg, it copies the audio stream without re-encoding, and extracted audio DOES import in Vegas Pro, makes me wonder why this is even happening?
As in the screenshots presented, the first one is from an AVI file and the second one is from extracted audio wav file, only difference in there I spotted is "Alignment" and "Interleave, duration" are missing in extracted audio one.
I am just curious if anyone can explain this behavior with Vegas Pro? Or maybe if there is a setting that needs to be switched On or Off? Otherwise, I have mostly figured it out even with this issue present, just a nagging mystery of why this is happening, It shouldn't need audio to be extracted when audio is compatible alone.