matroskaenc: add codec_tag lists back.

This reverts 312645e :
"Do not set codec_tag property for matroska muxers."

Also adds dummy codec_tag lists with codecs
supported in mkv but not in wav / avi.

Fixes ticket #2169.
(cherry picked from commit df39c3ce385c02cbd8046298578ea7454c0a0f81)

Conflicts:
	libavformat/matroskaenc.c
wtvdec: demux thumbnail picture to AVStream.attached_pic

Fixes ticket #2133.

(cherry picked from commit 508836932fcbc3c109fcc4df7a2f2b0bf21bbece)

Conflicts:
	libavformat/wtvdec.c
ffmpeg: dont allow -flags to override -pass

Fixes Ticket2154

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit ccf9dd00da055e94117b56cead4af80ff331b00e)

Conflicts:
	ffmpeg_opt.c
h264_refs: Print default in case we are missing a reference.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit a39d36146a40cb52b3560fd02c73eccf72603b8f)
h264: Reset last_pocs in case of reference or frame number inconsistencies

This prevents faulty increasing of has_b_frames
Should fix Ticket 2062

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit c230af9bccc3cadb373f9007ba14fffb6c2acc75)
sws: dont write out of array on bigendian

Fixes Ticket2229

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 4e2c63685e031e28d2296cff76473b963ee62ba1)
Write the fiel atom to mov files independently of the used video coded.

The QuickTime specification does not contain any hint that the atom
must not be written in some cases and both the QuickTime and the
AVID decoders do not fail if the atom is present.

This change allows to signal (visually) interlaced streams with
a codec different from uncompressed video.

As a side-effect, this fixes ticket #2202
(cherry picked from commit 7d0e3b197c817b307d599a23704a44763ed0bbdd)

Conflicts:
	libavformat/movenc.c
	tests/ref/lavf/mov
	tests/ref/seek/lavf_mov
	tests/ref/vsynth/vsynth1-avui
	tests/ref/vsynth/vsynth1-dnxhd-1080i
	tests/ref/vsynth/vsynth1-mpeg4
	tests/ref/vsynth/vsynth2-avui
	tests/ref/vsynth/vsynth2-dnxhd-1080i
	tests/ref/vsynth/vsynth2-mpeg4
Revert "swfenc: use av_get_audio_frame_duration() instead of AVCodecContext.frame_size"

This reverts commit 620b88a302d522f71a6a95aff500cf7bd8520043.

Fixes ticket #2272.