vf_select: Drop a debug av_log with an unchecked double to enum conversion

CC: libav-stable@libav.org
ffmpeg_filter: refuse to configure input without a decoder.

The decoder is necessary in order to filter frames.
This makes the error message clearer in this case:
currently, it will usually fail because the pixel or sample
format is not defined and is converted into "(null)"
(non-portable).

Enhance trac ticket #3779.
Merge commit 'a8d803a320fb08b3ad5db4fffc79abd401206905'

* commit 'a8d803a320fb08b3ad5db4fffc79abd401206905':
  vf_select: Drop a debug av_log with an unchecked double to enum conversion

Conflicts:
	libavfilter/f_select.c

Not merged, see next commit for the bugfix

Merged-by: Michael Niedermayer <michaelni@gmx.at>
avfilter/f_select: avoid using doubles for equals checks and casts to enums

This might silence some warnings.

Issue found from: a8d803a320fb08b3ad5db4fffc79abd401206905
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avfilter/f_select: Set var_values[VAR_KEY] correctly

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avfilter/f_select: avoid double->int in debug output

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avutil/frame: add av_frame_side_data_name()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
ffprobe: print some basic information about avframe side data

Reviewed-by: Stefano Sabatini <stefasab@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
mxfdec: add missing "const" to array declaration.

Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>
movdec: remove nonsensical snprintf.

Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>
configure: Globally add ZLIB_CONST to CPPFLAGS if zlib is enabled
Merge commit 'a0ce85ac7de098d3f9b53b51b77a09bad700a011'

* commit 'a0ce85ac7de098d3f9b53b51b77a09bad700a011':
  configure: Globally add ZLIB_CONST to CPPFLAGS if zlib is enabled

Merged-by: Michael Niedermayer <michaelni@gmx.at>
avformat/hlsenc: Add some comments to make the code easier to read

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avformat/hlsenc: rename some identifers to make the code easier to read

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avformat/hlsenc: add some empty lines to make the code easier to read

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
doc: add very basic libcdio documentation

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/mpeg4video_parser: Check for extradata parsing failure

Found-by: CSA
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/pthread_slice: Check for malloc failure

Found-by: CSA
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/resample: check for malloc failure

Found-by: CSA
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/dvdsubdec: free subtitle rectangles if nothing is output

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