[FFmpeg-user] how to re-add original audio delay back into a 2-inputfile ffmpeg transcode

[Carl Eugen Hoyos]

Am Do., 30. Juli 2020 um 06:53 Uhr schrieb <hydra3333 at gmail.com>:

> I have a .mpg with interlaced mpeg2 and ac3 audio, which needs
> converting to progressive .mp4 avc/aac.
>
> The interlaced video is a bit grainy etc so I hope to deinterlace and
> clean it up using vapoursynth CUDA filters

I am curious:
What are the advantages of these filters over the de-interlacers
provided by FFmpeg?

Carl Eugen