OK... if I add an explicit -i ahead on input.mpr it works in both ffmpeg and ffplay:
ffplay -i input.mp4 -vf movie=logo.png,[in]overlay and... ffmpeg -i input.mp4 -vf movie=logo.png,[in]overlay test.mp4 Still no joy trying to make the SDL output device work on MacOSX though. ...off to re-read the section on filter chains and filtergraphs in Frantisek Korbel's book! Many thanks for all the patient help for a noob! -- Richard ----- Original Message ----- From: "Richard Milewski" <[email protected]> To: "FFmpeg user questions" <[email protected]> Sent: Sunday, August 17, 2014 5:20:53 PM Subject: Re: [FFmpeg-user] MacOSX Output Question Thanks for the help Carl. ~ ffplay input.mp4 -vf movie-logo.png,[in]overlay does show overlay correctly, ...but if I try the same line with ffmpeg: ~ ffmpeg input.mp4 -vf movie-logo.png,[in]overlay output.mp4 It fails in a strange way by trying to over-write the input.mp4 file? I clearly don't understand that syntax (Back to the docs!). Sadly, OSX only shows me one output device (SDL), and that fails with *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Error (1000) creating CGSWindow on line 263' whenever I try to use it with a -f. Without the -f, FFmpeg tells me sdl is an invalid argument. Lots to learn yet, I guess. -- Richard ----- Original Message ----- From: "Carl Eugen Hoyos" <[email protected]> To: [email protected] Sent: Sunday, August 17, 2014 4:50:33 PM Subject: Re: [FFmpeg-user] MacOSX Output Question Richard Milewski <richard <at> mozilla.com> writes: > ffplay -i input.mp4 -i logo.png -filter_complex overlay $ ffplay input.mp4 -vf movie=logo.png,[in]overlay Or you use one of the several video output devices that are listed with "ffmpeg -devices". (The number might be limited on osx, note that they are video-only, if you use an audio output device at the same time, you might get A/V sync problems.) Carl Eugen _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user
