On 5/7/2020 6:56 PM, Edward Park wrote:
> Are the logo png files transparent and same size as the video frame size?
> If so you can use the overlay filter with the logo file as second input.
And if not, it's easy enough to resize/reposition and add an alpha channel
if missing. That may be way faster than messing about with command line options.
IMHO unless there's a very specific reason for doing 4-in-1, you're better
off using separate invocations of ffmpeg for each output file; the KISS
principle (keep it simple) applies here.