When calling vlc_va_Get() failed inside ffmpeg_GetFrameBuf(), then
the error messages says "vaGrabSurface failed" however it should
say "vlc_va_Get failed". Since hw accelerators are called through a
vlc abstraction defined in va.h. It originated from libva (VAAPI),
but it includes VDPAU and DXVA2 now.

Keep atleast 3 * seglen amount of segments in playlist if possible.
This will cause playlist to increase sometimes over i_numseg, but it
follows the draft better.

livehttp: try to comply draft 11 section 6.2.2 for how long to keep segments around in sliding window

This seems buggy in libavcodec

Close #8486

Introduced by WIN32 -> _WIN32 probably

Close #8804

Close #8510
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Close #8787

So far rawvideo assumed that the full pitch was part of the picture.

The target thread has no defined cancellation points, so simply remove
the vlc_cancel() call. (Adding vlc_savecancel() would work to the same
effects, but with extra code.)

The cancellation-safe section was protected instead of the
cancellation-unsafe section.

This fixes the corner where the username or the password contains @
(although encoding would probably be a better idea).

VLC main() initializes the values too late for interfaces and playlist.

This should fix ISDB-S tuning.