ffmpeg -i input.mp4 -filter:v scale=1920:ih*2 c:a copy output.mp4dokumentace k filtru scale: · Scale the input to half size: scale=w=iw/2:h=ih/2 · Increase the width, and set the height to the same size: scale=3/2*iw:ow · Seek for Greek harmony: scale=iw:1/PHI*iw scale=ih*PHI:ih · Increase the height, and set the width to 3/2 of the height: scale=w=3/2*oh:h=3/5*ih · Increase the size, but make the size a multiple of the chroma subsample values: scale="trunc(3/2*iw/hsub)*hsub:trunc(3/2*ih/vsub)*vsub" · Increase the width to a maximum of 500 pixels, keep the same input aspect ratio: scale=w='min(500\, iw*3/2):h=-1'