On Fri, Jul 19, 2019 at 09:08:23 -0400, Jim Shupert wrote: > On 7/19/2019 5:26 AM, Marc Roos wrote: > > Is there a way to ffmpeg or maybe another tool that detects if video has > > been re-coded to a higher resolution? > I have wondered on this as well > my notion is there is a ' traceable artifact' left in the up Scaled - > somewhere , somehow. > but how?
Actually, it's apparently easiert to programmatically detect in the frequency domain. There's a tool out there which implements this - resdet: https://github.com/0x09/resdet It does seem to work! The algorithm could probably be ported to an ffmpeg filter (similar to cropdetect). Though it's probably not useful analyzing a whole video with it, just after every scene change or so. Cheers, Moritz _______________________________________________ ffmpeg-user mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
