"-r 1 " is just going to use the input file sampling rate, no? I don't
think this is a sampling rate problem unless there's signs of "rolling
shutters" or total disconnect in the expected output playback.
"You need to check with V4L utilities or ffmpeg, which formats /
resolutions your v4l2 devic
I can't say for certain as its been some time since I used ffmpeg, but
there are only a fixed number of resolutions to pass to ffmpeg using the -s
size parameter and the behavior isn't what you're probably looking for.
What you probably need to look at is the scaling filter:
https://ffmpeg.org/ffm
I haven't compiled ffmpeg on Windows recently, but it's not clear from what
you sent what exactly you're trying to do. Can you explain your development
environment and intention more? For example, are you cross-platform
compiling ( it looks like you are )?
The above errors are not the first-warni