Video size difference across different formats I'm working on video editing on VSDC and my exports are so much larger then the original video when I export it into mp4 format.
All I did to the video was delete the sound from the video and replace it with the same sound which I cleaned up a bit with audacity and exported into wav format.
The original size of the video was 34mb and the wav file was about 4mb but the export was over 200mb.
I exported it with the option that the software has for youtube and set the quality for 1080p.
I don't understand whats going on.
Could it be that my original video is of a lesser quality then 1080? And the software is adding filler pixels? Are these the numbers I should be looking at?
the original file was mov.

I got a more reasonable file size of 31mb when I exported to avi.
Even exporting to mkv its only 41mb.
You first need to tell us which software you're using. I'm assuming it's the adobe media encoder? Handbrake? ffmpeg?
Nonetheless, the filesize is determined by your resolution, framerate and bitrate. Try exporting the video with VBR with 2 passes and set the bitrate to something between 3 and 6 - that should be enough for a 1920x1080 h264.