Re: [gentoo-user] media-video/gpac and media-video/mplayer fails to build.

[Frank Steinmetzger <Warp_7@gmx.de>]

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Am Thu, Feb 20, 2025 at 11:14:19AM -0700 schrieb Mark Knecht:
> On Thu, Feb 20, 2025 at 11:01 AM Dale <rdalek1967@gmail.com> wrote:
> >
> > Howdy,
> >
> > I downloaded some really new videos the other day, .mkv ones.  Nothing I
> > had would play them, mplayer or mpv based players.
> 
> Convert them using handbrake. Probably saves you a bunch of disk space also

Matroska is just a container format – as its name implies from the Russian 
dolls: https://en.wikipedia.org/wiki/Matryoshka_doll

MKV is simply one of the *the* best container formats out there right now. 
It is open and supports many many different types of media streams inside 
(video, audio, subtitle, metadata, attachments, chapters). It possibly 
became very wide-spread through its use in the movie ripping scene, but by 
know is also supported by the corporate world. Even my Sony TV can play them 
natively from a USB device (well, it’s Android after all).

If you really want to use a different container (maybe mp4), then convert it 
without re-encoding:
ffmpeg -i input.mkv -map 0 -c copy output.mp4

`-map 0` means copy every stream from the input file, not just the first of 
each type
`-c copy` means copy the streams without re-encoding

But it won’t make any difference to the player. Unless you disabled the mkv 
use flag, that is. ^^

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