It will make dvdnav and dvdsimple having the same behaviour.

It also factorize channel order definitions.
The DTS order for middle channels can be wrong.

Add video output that dumps raw YUV frames in a file, with YUV4MPEG2 compatible header as used by mplayers yuv4mpeg video ouput module.

Add scene filter which provides the same functionality as the vout_output image, but which can be inserted in a playback or stream out chain.

This will help our muxers creating better files.

This function was returning a buffer allocated with the wrong type (alloca)
when a filter returned 0 sample (scaletempo at least).

unmaintained and confuse users.

I forgot that changes in [f351451d]

(access_filter_dump could probably be removed too)