Signed-off-by: Lukasz Marek <lukasz.m.luki@gmail.com>

SDL device reports double free or hangs when quiting.
Reseting variables solves the issue.

The issue is caused by double call of write_trailer callback.
It is called for the first time in write_packet when quit flag is set.
Second call comes from ffmpeg.c or may come from other client application.

Signed-off-by: Lukasz Marek <lukasz.m.luki@gmail.com>
Reviewed-by: Nicolas George <george@nsup.org>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Lukasz Marek <lukasz.m.luki@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Avoid busy loops and decrease CPU usage.

Suggested-By: Roger Pack

It will be used in event_thread() in a pending patch.

SDL_Init() is called on the event handler thread, as required by SDL in
Windows to avoid deadlocks as discovered by Roger Pack.

Fix trac ticket #1743 and #1744.

They are automatically freed when calling av_write_trailer(). Simplify.

Decrease log spam.

This is consistent with the apparently prevailing convention.

An help message tells what an option does, not what its argument is.

The rounding was wrong due to incorrect ue of floats,
changed to rationals and av_rescale.

The results were not properly passed to SDL.

The size passed to SDL_CreateYUVOverlay is the size
of the video in pixels, it must not take the aspect ratio
into account.

It allows vsync to be automatically set to passthrough.

Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>

This allows a more efficient use of the commandline.