FFMPEG multiple steps in a batch process

Question

I'm new to using ffmpeg for modifying video content, and I was looking for help creating a command to do the following:

1. Trim the first 4
2. Trim the last 4 seconds of a video
3. Add a 1 second fade to beginning and end
4. Include a watermark in the bottom right corner

I've been able to find examples of doing each of these individually, but am not sure--syntactically--if it's possible to do all 4 of these things in a single command.

Any help is appreciated!

Answer 1

1. Get duration with ffprobe.

2. Run ffmpeg. Example if duration is 30 seconds:

   ffmpeg -ss 4 -to 26 -i input.mp4 -i watermark.png -filter_complex "[0:v][1]overlay=x=W-w-10:y=H-h-10,fade=t=in:d=1,fade=t=out:d=1:st=21[v];[0:a]afade=t=in:d=1,afade=t=out:d=1:st=21[a]" -map "[v]" -map "[a]" output.mp4
   

See FFmpeg Filter Documentation for more info and How to add and position watermark with ffmpeg?