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--- ffmpeg:video:resize:convert_to_1080p_1920x1080 [2025/01/29 22:28] – peter
+++ ffmpeg:video:resize:convert_to_1080p_1920x1080 [2025/01/29 22:36] (current) – peter
@@ Line 4: / Line 4: @@
 ffmpeg -i input.mp4 -vf "scale=1920:1080" -c:v libx264 -crf 23 -c:a copy output.mp4
 </code>
+----
+===== For enhanced quality =====
+<code bash>
+ffmpeg -i input.mp4 -vf "scale=1920:1080:flags=lanczos" -c:v libx264 -crf 23 -c:a copy output.mp4
+</code>
+<WRAP info>
+**NOTE:**  This uses the **Lanczos** scaling algorithm, which can provide better results for upscaling.
+Lanczos resampling involves a sinc filter as well.
+  * It is more computationally expensive but usually described as very high quality and can be used for up- and down-sampling.
+</WRAP>
+----
+===== Using GPU =====
+<code bash>
+ffmpeg -vaapi_device /dev/dri/renderD128 -i "input.mkv" -vf 'hwupload,scale_vaapi=w=1920:h=1080:format=nv12' -map 0:v -metadata:s:v:0 language=eng -c:v hevc_vaapi -map 0:a -metadata:s:a:0 language=eng -map 0:s? -metadata:s:s:0 language=eng -rc_mode CQP -global_quality 25 -c:a copy -c:s copy -profile:v main -v verbose output.mkv
+</code>
+----