I have a .mov video file with 1440x1080 resolution. I extracted the frames from the video, using scale -vf scale=1440:-1 but the images are stretched. Even though, the dimension of the extracted images are 1440x1080, the image is stretched on the height dimension and doesn't match the aspect ratio of the video.
How can I solve this issue?
Here is the output from FFMPEG for the original video:
Stream #0:0(eng): Video: qtrle (rle / 0x20656C72), rgb24(progressive), 1440x1080, 624445 kb/s, SAR 4:3 DAR 16:9, 25 fps, 25 tbr, 25 tbn (default)
As the value of DAR is 16:9 but 1440x1080 is not 16:9 then to generate the frames with "the proper" aspect ratio you should use -vf scale=1920:1080 filter instead.