[FFmpeg-user] Why does '-c:v copy' decode video frames?

[Carl Eugen Hoyos]

2019-02-22 18:28 GMT+01:00, Yukun Guo <gyk.net at gmail.com>:

> I still can't understand this. Why does FFmpeg need
> MVs? My guess is calculating MVs is just a
> byproduct of extracting the metadata.

The decoder does not know that it was only called to
provide some information about the stream, not the
actual decoded data.

Please do not top-post here, Carl Eugen