avformat/gxfenc: Added support for writing correct auxiliary data for DV streams.

Different aux data is written for DVCAM and DVPRO formats.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
lavu/opt: show default values for AV_OPT_TYPE_PIXEL_FMT and AV_OPT_TYPE_SAMPLE_FMT too

Signed-off-by: Paul B Mahol <onemda@gmail.com>
Merge remote-tracking branch 'cehoyos/master'

* cehoyos/master:
  Show max bitrate for mpeg2 video streams in avcodec_string().
  Allow native compilation on the iPhone.

Merged-by: Michael Niedermayer <michaelni@gmx.at>