Update FFmpeg parameters

[Petr Nejedly]

Deprecated params: * rtsp ?tcp * vcodec, acodec, map, bitrate * replace sameq with qscale 1 * replace async with asyncts http://ffmpeg.org/ffmpeg.html#asyncts * check user-agent http://ffmpeg.org/trac/ffmpeg/ticket/1291

[Illico]

Also command order is now important

http://forum.serviio.org/viewtopic.php?f=7&t=4721&p=32329&hilit=+option#p32329

[Petr Nejedly]

check -copytb

[Former user]

Using version 1.0,1, I see that ffmpeg is still invoked with -sameq. In a newer ffmpeg version, that argument is not working anymore, and will fail ffmpeg execution.

Instead, use -q:a 1 and -q:v 1. Don't use -qscale, that won't work either.

[Petr Nejedly]

1.1 fixes this