[FFmpeg-user] -pix_fmt yuv420p and deinterlacing

Andy Furniss adf.lists at gmail.com
Sun Feb 26 02:26:01 EET 2017

Katherine Frances wrote:

> ffmpeg -i uncompressed_master.mov -c:v libx264 -pix_fmt yuv420p -c:a
> libfdk_aac -b:a 128k access_copy.mp4

If the masters really are interlaced you will slightly break them
doing this.

You need to add -vf scale=interl=1

Additionally ffmpeg git master recently changed this to be better than
it was, so using latest should be best.

To retain interlacing you would also need a different command for libx264.

What to do depends on what you want and what the source really is.

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