[FFmpeg-user] Blue Ray Question

[Carles Vila]

On 9 June 2017 at 15:26, Ron Barnes <rbarnes at njdevils.net> wrote:

> Hello All,
>
>
>
> I know there are tools out there for this question but I'm hoping FFmpeg
> can
> handle things.
>
> I have an old blue ray that I would like to shrink.  The only problem is
> when I open the BR in File Explorer there is no way of knowing which files
> are the main movie and what order those files are supposed to be in.
>
>
>
> Can FFmpeg or a tool of FFmpeg help in determining the answer?
>
>
>
> What is the main movie files and what order should they be in?
>
>
No, ffmpeg won't help you in determining that
Blu-rays can be authored in many ways. The main content is most probably
the largest file. For a feature film, around 20 GB for a single-layer BD or
40 GB for a double-layer BD.
Other files you will see are extra content, trailers, logos, whatever. just
look for the largest file.
Keep in mind if it's a commercial BD, it will be encrypted and ffmpeg won't
decode it.