FFMPEG - fade in logo independent of fade in video and subtitles

[EasyFeet]

I'm on a windows 7 box using FFmpeg version: 20170223-dcd3418 and would like to control the fade in timing of my logo watermark independent of the fade already built in to my video.

This code is working OK but I can't work out how to fade the watermark without also fading my input video stream.

 ffmpeg -y -i mainvideo.mp4 -i watermarklogo.png -filter_complex "[0:v]overlay=W-w-10:H-h-10, fade=in:0:20[tmp_overlay]; [tmp_overlay]subtitles=ep1.srt[out]" -map [out] -map 0:a -codec:v libx264 -crf 18 -preset slow -pix_fmt yuv420p -c:a aac -strict -2 output.mp4

I've tried a number of combinations but am out of my depth with FFMPEG's -filter_complex command so any help would be appreciated.

Please let me know if I can provide further information.

[pandy]

I'm on a windows 7 box using FFmpeg version: 20170223-dcd3418 and would like to control the fade in timing of my logo watermark independent of the fade already built in to my video.

This code is working OK but I can't work out how to fade the watermark without also fading my input video stream.

I've tried a number of combinations but am out of my depth with FFMPEG's -filter_complex command so any help would be appreciated.

Please let me know if I can provide further information.

Use alpha channel.

[Budman1]

If you can use AVISYNTH with ffmpeg you can control all aspects of fadein and fadeout by number of frames and the script is easier than the overlay used by ffmpeg alone. The following avisynth script allows srt (ssa also will work) subtitles as well as an overlay of a second video.

LoadPlugin("C:\Users\Bud\Desktop\VSFilter.dll")
v1 = Directshowsource("C:\Users\Bud\Desktop\[dp]Manjandani-1.mp4").ConvertToRGB32.Lanczosresize(864, 368)
v1=v1.textSub("C:\Users\Bud\Desktop\Wham.srt")
img1 = DirectShowSource("C:\Users\Bud\Desktop\Wham!Last Christmas.mp4", pixel_type="RGB32", fps=23.976).converttoRGB32.LanczosResize(160,90)
img2 = DirectShowSource("C:\Users\Bud\Desktop\Wham!Last Christmas.mp4", pixel_type="RGB32", fps=23.976).converttoRGB32.LanczosResize(160,90)
img3 = DirectShowSource("C:\Users\Bud\Desktop\Wham!Last Christmas.mp4", pixel_type="RGB32", fps=23.976).converttoRGB32.LanczosResize(160,90)
img4 = DirectShowSource("C:\Users\Bud\Desktop\Wham!Last Christmas.mp4", pixel_type="RGB32", fps=23.976).converttoRGB32.LanczosResize(160,90)
 \
clip1 = v1.trim(0, -101).Overlay(img1.assumefps(23.976).trim(0,-101).fadein(60).fadeout(60), 100, 100,Opacity=1.0, img1.ShowAlpha()) \
 ++ v1.trim(101, -99) \
 ++ v1.trim(200, -101).Overlay(img2.assumefps(23.976).trim(200,-101).fadein(60).fadeout(60), 150, 150,Opacity=1.0, img2.ShowAlpha()) \
 ++ v1.trim(301, -99) \
 ++ v1.trim(400, -101).Overlay(img3.assumefps(23.976).trim(400,-101).fadein(60).fadeout(60), 200, 200,Opacity=1.0, img3.ShowAlpha()) \
 ++ v1.trim(501, -99) \
 ++ v1.trim(600, -101).Overlay(img4.assumefps(23.976).trim(600,-101).fadein(60).fadeout(60), 250, 250,Opacity=1.0, img4.ShowAlpha()) \
 ++ v1.trim(701, 0)
return clip1

The above is a little overkill but shows 4 logos (img) fading in and out from black in different locations. The opacity can be set from 1.0 (Opaque) to 0.0 (Transparent). The fps of the img is set to the fps of the main video. The dot "." filters (assumefps, fadein, fadeout, etc.) follow each item that you wish to control. The below image may help to clarify the script: