Applying multiple filters at once with FFMPEG

[asterixvader]

Hello.

I have the need to apply fadein and overlay filters to a video. Is it possible to apply 2 filters at once?

I got: ffmpeg -i input.mpg -vf "movie=watermark.png [logo]; [in][logo] overlay=W-w-10:H-h-10 [out]" output.mpg

I'm trying to add "fade=in:0:20", but if I add a new -vf parameter, it will overwrite the preceding one, and if I add: -vf "fade=in:0:20; movie=......" it won't work.

Is this possible to do or do I have to run ffmpeg twice, using one filter at a time?

[Chris K]

You have to do it all in one -vf chain but you don't need to run FFmpeg twice.

If you want to fade-in the overlay it should work this way (separate filter commands with commas)...

ffmpeg -i input.mpg -vf "movie=watermark.png, fade=in:0:20 [logo]; [in][logo] overlay=W-w-10:H-h-10 [out]" output.mpg

If you put it after [in], it probably fade in both (didn't try this one)...

ffmpeg -i input.mpg -vf "movie=watermark.png[logo]; [in] fade=in:0:20, [logo] overlay=W-w-10:H-h-10 [out]" output.mpg

[asterixvader]

Oh, yeah...! commas. I forgot about them.

I tried both commands. The first one won't apply any effect, the second one will apply fadein only to the video, not to the watermark, which is fine.

But then I tried this command:

ffmpeg -i input.mpg -vf "movie=watermark.png [logo]; [in][logo] overlay=W-w-10:H-h-10, fade=in:0:20 [out]" output.mpg

and it applies fadein to both the video and watermark.

Thank you very much for your reply.

[Chris K]

But then I tried this command:

ffmpeg -i input.mpg -vf "movie=watermark.png [logo]; [in][logo] overlay=W-w-10:H-h-10, fade=in:0:20 [out]" output.mpg

and it applies fadein to both the video and watermark.

Yes very nice! Now I see there's more logic in that position. First the two inputs, then fade.

Strange that the first example didn't work. Probably because it's a image. I did it where the "movie" command is a video clip so FFmpeg can count the requested number of frames.