need to efficent encode this .MXF from Canon XF300 to .MP4 with FFmpeg

[marcorocchini]

Hi ****

I need to encode this AA012101.MXF that is a mxf/mpeg2 video file into a .mp4 420 using ffmpeg.

https://www.dropbox.com/s/l2y4blybgv8q5aw/AA012101.MXF?dl=0

Semms that crf encoding is taking an output too heavy in MB of the final .mp4 output

Please can you suggest me a commandline that generate an efficient encoding, able to generate a video without artifacts, with a "small" heavy in MB of this? thanks

[Anonymous543]

use 2 pass rate control mode also reduce video resolution if you can and
libx265 encoder for video
libopus encoder for audio
with mkv wrapper

[marcorocchini]

sorry but my station need only h264 codec with .mp4 continer. Resolution have to be the same x 1920 1080.
Only a scaling 422-->420 is permitted

please I need the commandline desperately


[Attachment 63798 - Click to enlarge]

[Anonymous543]

Only a scaling 422-->420 is permitted

you mean chroma subsampling?
if yes then -vf format=yuv420p this will change your video to 4:2:0

use this complete code if you are using windows

ffmpeg -y -i input -c:v libx264 -preset slow -vf format=yuv420p -b:v 4000k -pass 1 -an -f null NUL && ^
ffmpeg -i input -c:v libx264 -preset slow -vf format=yuv420p -b:v 4000k -pass 2 -c:a aac -b:a 128k output.mp4

[marcorocchini]

ah wow