[FFmpeg-user] default to yuv

[Roger Pack]

>> A user noticed that they "suddenly got no video when streaming to red5"
>> http://ffmpeg.zeranoe.com/forum/viewtopic.php?f=7&t=686
>> "Builds starting from a85b4a5'ish all default to yuv444p here, it used
>> to be yuv420p."
>
> I considered it a bug that ffmpeg chose yuv420p if the input
> pixel format was bgr24 and the encoder supports yuv444.
>
> I agree that in the case of x264 this could be seen as
> unexpected, but only because the commercial h264 decoders
> typically do not support decoding anything except yuv420p.
> Please remember how many reports "If I encode my rgb input
> to mpeg2/mpeg4 the output quality is bad no matter the
> chosen bitrate!" we only received this week!

Ok then as long as it's expected.
Thanks!
-r