Wiki

This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong.

====== ffmpeg - Video - Resize - Convert to 1080p (1920x1080) ======

<code bash>
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>

----