FFmpeg 8.0 introduces a major performance boost with  pad_cuda , an Nvidia GPU-accelerated padding filter that works with scale_cuda . Padding and scaling are used for adjusting resolution and aspect ratio, such as converting a horizontal clip to a vertical one, which is particularly useful for platforms like TikTok, YouTube Shorts, and Instagram Reels. Because these operations modify every pixel, they require full re-encoding, which makes them computationally expensive in F