That fixes the y4m with unknown chroma that avformat can read

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

This may be too big font for some, but static 7 point isn't that good either.

Manual forwardport of [1c26d070fa884f9964482b6ee46a76f3d94ba6e8]

legacy OS X intf: fixed a rare case in which the vout window could loose its window decoration on recreation after a performed close

Manual forward-port of [fcbdd49671dfc8f2f0a6a74a6da19153b54137bb]

Close #3485

Signed-off-by: Christophe Mutricy <xtophe@videolan.org>

Signed-off-by: Christophe Mutricy <xtophe@videolan.org>

Use only pkg-config.
Fix sdl_image detection

But you need careful, if you compile without X and then run with an X-enabled PulseAudio, boom.

Closes: #3650

 It fixes 'on top' behaviour when going fullscreen (at least for linux), and
it avoid having a 'Untitled Window' in the taskbar when fullscreen.

It properly fixes #3526.

The maximum number of surfaces it will allow is now 128, but the actual value
used is configured by the core (around 20-30 when DR is used, a few otherwise).

All the operations are done from the command thread now

This should help watching mp4-videos (&fmt=18 and 22 or something like that)
from youtube. ffmpeg for fallback for windows. Not idea about OS X side.

contribs: added Google's libvpx patch for ffmpeg with a couple of compilation fixes for Mac OS X and added another patch for libvpx

Please note that updating pre1 to pre3 won't work because of this missing key *cough*

Mac OS X: added various missing file extensions to the supported-by-this-application-list (xa, m3u8, b4s, vlc, xm, amr, aob, dts, cdg, idx, oma, voc, vqf, mpeg1, mpeg2, mpeg4, mts, mid, mlp, webm, rar, rec, rmi, s3m, vro, tod, utf)

This should fix usage on windows.