I am trying to place a watermark.png image on a video with a fade-in effect. This is my command:
ffmpeg -i input_vid.mp4 -c:v libx264 -pix_fmt yuv420p -vf movie=watermark_3.png, scale=144:31 [watermark]; [in][watermark] overlay=5:H-h-15, fade=in:0:30:alpha=1[out] -s 180x320 -preset ultrafast -c:a copy out.mp4
But this makes the whole video fade in from black.. Any idea's?
Use
ffmpeg -i input_vid.mp4 \
-vf "movie=watermark_3.png:loop=0.1,setpts=N/FRAME_RATE/TB,scale=144:31,format=rgba,fade=in:0:30:alpha=1[watermark]; \
[in][watermark]overlay=5:H-h-15:shortest=1,scale=180x320[out]" \
-c:v libx264 -pix_fmt yuv420p -preset ultrafast -c:a copy out.mp4
The fade has to be applied in the watermark chain to affect it only. The loop flag is set to a number below one, so that it loops the single image indefinitely. setpts ensures monotonically increasing timestamps.
fade=in:0:30:alpha=1 it appears, but without fade of course