h263dec: call get_format after setting resolution and profile

Bug-Id: 541
h263dec: call get_format() on resolution changes

Fail safe if the pixel format changes.
lavc: use a separate field for exporting audio encoder padding

Currently, the amount of padding inserted at the beginning by some audio
encoders, is exported through AVCodecContext.delay. However
- the term 'delay' is heavily overloaded and can have multiple different
  meanings even in the case of audio encoding.
- this field has entirely different meanings, depending on whether the
  codec context is used for encoding or decoding (and has yet another
  different meaning for video), preventing generic handling of the codec
  context.

Therefore, add a new field -- AVCodecContext.initial_padding. It could
conceivably be used for decoding as well at a later point.
lavf: use initial_padding instead of deprecated delay
Merge commit '1f29e5d7a2b0950f3b6820896e97e2c02e6a10a9'

* commit '1f29e5d7a2b0950f3b6820896e97e2c02e6a10a9':
  h263dec: call get_format after setting resolution and profile

Merged-by: Michael Niedermayer <michaelni@gmx.at>
avformat/utils: print more information with av_dlog() in compute_pkt_fields()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'c80a816142699dea9cf9fa66689a7838a487ed7e'

* commit 'c80a816142699dea9cf9fa66689a7838a487ed7e':
  h263dec: call get_format() on resolution changes

Merged-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/aacdec: print element types when debug startcode is set

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '2df0c32ea12ddfa72ba88309812bfb13b674130f'

* commit '2df0c32ea12ddfa72ba88309812bfb13b674130f':
  lavc: use a separate field for exporting audio encoder padding

Conflicts:
	libavcodec/audio_frame_queue.c
	libavcodec/avcodec.h
	libavcodec/libvorbisenc.c
	libavcodec/utils.c
	libavcodec/version.h
	libavcodec/wmaenc.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/ac3enc_template: use the initial_padding field

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'eabdc2a830f1ab1a3f12243eb7e2fba801cb81f0'

* commit 'eabdc2a830f1ab1a3f12243eb7e2fba801cb81f0':
  lavf: use initial_padding instead of deprecated delay

Conflicts:
	libavformat/matroskaenc.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
ffmpeg: Fix stream copy with initial_padding

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avformat/mp3enc: use initial_padding

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