![]() ![]() ![]() I'm not sure how to draw the box and scale it separately from the source video. can also specify the options directly in the scale filter, for example. 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. Use the SAR filter to reset the SAR after scaling. If you want all of the frames as is then omit the fps filter. If your input has less than 20 fps, then ffmpeg will duplicate frames to convert to 20 fps. Maybe the expression for out_w:'if(gte(t*20,600),600,t*20)' or for out_h:'20' is self-referencing. The scale filter will adjust the sample aspect ratio to maintain the original display aspect ratio, which is 16:9 for your input. ffmpeg -i 240video.mp4 -vf 'fps20,scale1920:1080' 240scaled/outd.png If your input has more than 20 fps, then ffmpeg will drop frames to convert to 20 fps. With this I get an error of: Error when evaluating the expression 'if(gte(t*20,600),600,t*20)'. Smart IPTV Billing Modules Available for Following IPTV Panels: > Zapx. 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 It supports all common protocols as an input and it is powered by the FFMPEG. I've seen some solutions using overlay, but they are fixed width and are rather used to move the box around. Since drawbox does not support the 't' (as in time) variable, I'm at a loss here. what year is my case excavator, and each email you receive will include easy unsubscribe options. See the ffmpeg-resampler manual for the complete list of supported options. If not explicitly specified the filter applies the default flags. The filter accepts the syntax samplerate:resampleroptions, where samplerate expresses a sample rate and resampleroptions is a list of keyvalue pairs, separated by :''. The most complex of them all, specifying what video scaling algorithm to use when scaling. See (ffmpeg-scaler)the ffmpeg-scaler manual for the complete list of values. You can read more about the encoding options here and here. ![]() ![]() I need to draw a box that grows in size horizontally over a video (scaling its width as time goes by) Scale a video and also encode or compress it at the same time: ffmpeg -i input.mp4 -vf scale3840:2560 -c:v libx264 -preset fast -crf 22 output.mp4. ![]()
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