This reverts commit 16e99999.

We use short flac extra format if it does *not* start with the header.
Thus we need not to add ! in front of memcmp

The Thread() function could access demux->p_sys before it was assigned a value other then NULL.
If this happens then it will crash on line 158 while accessing sys->pcm.

Fixes #9966.

Close #10096

In the swscale filter plugin, i_visible_width and i_visible_height fields
are now expected to be provided and greater than 0.

This fixes art display problems with the skins2 in recent builds.

Align seek time on second to avoid overflow on seek.

regression from 808e6123 as calculations
still used with/height instead of visible_width/height

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

The initial-segment-number option allows for passing in the number for the first
segment. This is useful if you want to append to an existing live
stream.
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Solve the green line bug during thumbnailing.
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>