New Shotcut user, trying to do a VERY basic edit, but when I export the video has been shrunken a bit and I can’t figure out why.
What I’m trying to do:
I have a video (about 20 seconds) with a stereo audio track. I’m trying to replace the audio track with an alternate 7.1 track. I had been using OpenShot but OpenShot has a bug with exporting in surround sound so I figured I’d try Shotcut.
So I opened the original 1920x1080 video, separated out the audio into its own track then deleted that track so I was just left with a silent video-only track. Then I imported the video clip w/ the 7.1 audio into a new track, again separated out the audio but deleted the video track. In the properties of the video track, I set the audio to “none” and in the properties of the audio track, I set the video to “none”. The video is 1920x1080.
When I go to export, I choose H.264 “high profile”. Resolution and Ratio are both set to 1920x1080. FPS is 24, just like the original. Deinterlacer is YADIF temp + spac, Interpolation is Hyper/Lanczos. CODEC is libx264, Rate control = Quality-based VBR, quality 100%. In “Other” I set “channels=8”. “Video mode” is still set to “automatic”. I don’t see any funnels to suggest I accidentally applied a filter.
I’d estimate the resulting video is about 25% smaller than the original, although VLC says the video is still 1920x1080, so it has a black border baked in and the smaller version is burned into a 1920x1080 frame. At least I’m getting my 7.1 but I’d like the original video to come out as close to original as possible.
What is this newbie missing?