Should it look like this Ffmpeg -hwaccel cuvid -resize 1920x1080 -i INPUT -c:v hevcnvenc -map 0 OUTPUT I thought of that too, but it doesn't make much sense. This example also shows how to resize multiple images (in windows): for j in (.jpg) do ffmpeg -i 'j' -vf scale480:-1 'Small-nj.jpg' This command will resize all. ![]() I'm not sure how to draw the box and scale it separately from the source video. I'll try the -resize option once the current set of tests are completed thank you. It can also convert between arbitrary sample rates and resize video on the. Now, if I set the width to a fixed value, it runs, but then there's the problem that the overlay contains the whole video itself as it is the input of the drawbox filter. FFplay is a very simple and portable media player using the FFmpeg libraries. With this I get an error of: Error when evaluating the expression 'if(gte(t*20,600),600,t*20)'. ffmpeg -i inputvideo.mp4 -vf 'scale1200:600' -b:v 10M outputvideo. Place all the images you want to scale in a directory. ![]() This is where I got trying to use drawbox and scale: ffmpeg -y -i c81e728d9d4c2f636f067f89cc14862c.mp4\ĭrawbox=0:0:20:20,scale=eval=frame:w='if(gte(t*20,600),600,t*20)':h=20 scale function sets both u and v plane, or singular interleaved plane. /ffmpeg.sh and inside the script /bin/bash for f in DJI.MP4 do ffmpeg -i 'f' -vf scale854:480 'smallf' done or with -nostdin flag after 'ffmpeg'. ith the ImageMagick -resize option, you can quickly and easily batch scale images to a desired size. ![]() I've seen some solutions using overlay, but they are fixed width and are rather used to move the box around. ffmpeg -i in.mp4 -vf scale720:-2 out.mp4 Once you get the video, it may be bigger than the expected 720x480since you let ffmpegcompute the height, so you'll have to crop it. Since drawbox does not support the 't' (as in time) variable, I'm at a loss here. I need to draw a box that grows in size horizontally over a video (scaling its width as time goes by)
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