Libvpx does not naturally scale across many cores at lower resolutions (e.g., 1080p). Setting -tile-columns divides the video into columns that can be encoded in parallel, utilizing multiple CPU cores efficiently.
Unlike x264/x265, where two-pass encoding is often slower, libvpx-vp9 two-pass is relatively fast and essential for maximizing quality. Analyzes the video to gather statistics. Pass 2: Uses those statistics to allocate bits efficiently. duster libvpx