flv: Only parse keyframe index when the underlaying protocol allows seeking as we need to seek to read the index
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Current keyframes data parser unconditionally rewind metadata to the end
at the end of function. As result ALL metadata located after keyframes
index not parsed,
and as metadata object can have ANY placement inside metadata it can
lead to unpredictable result
(bitrate can not be found, etc.). As result FLV movie will not play at
all in such situation.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

FAQ could use some work. This updates a few little details.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

* qatar/master:
  lavf: bump minor and add an APIChanges entry for avformat cleanup
  lavf: get rid of ffm-specific stuff in avformat.h
Not pulled:  avio: deprecate av_protocol_next().
  avio: add a function for iterating though protocol names.
  lavf: rename a parameter of av_sdp_create from buff->buf
  lavf: rename avf_sdp_create to av_sdp_create.
  lavf: make av_guess_image2_codec internal
  avio: make URLProtocol internal.
  avio: make URLContext internal.
  lavf: mark av_pkt_dump(_log) for remove on $next+1 bump.
  lavf: use designated initializers for all protocols
  applehttp: don't use deprecated url_ functions.
  avio: move two ff_udp_* functions from avio_internal to url.h
  asfdec: remove a forgotten declaration of nonexistent function
  avio: deprecate the typedef for URLInterruptCB
Merged-by: Michael Niedermayer <michaelni@gmx.at>

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

This is more consistent with the rest of the API.

The new name is more consistent with the rest of the API.

It doesn't look very useful as a public function.

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

This is more readable and makes it easier to reorder URLProtocol
members.

There's no particular reason to pollute the namespace with a typedef for
it.

    * ffmpeg-mt/master:
DUPLICATE mingw32 compilation after 'unbreak avcodec_thread_init'
      pthread: validate_thread_parameters() ignored slice-threading being intentionally off
DUPLICATE Remove unnecessary parameter from ff_thread_init() and fix behavior
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

* qatar/master:
  proto: include os_support.h in network.h
  matroskaenc: don't write an empty Cues element.
  lavc: add a FF_API_REQUEST_CHANNELS deprecation macro
  avio: move extern url_interrupt_cb declaration from avio.h to url.h
  avio: make av_register_protocol2 internal.
  avio: avio_ prefix for url_set_interrupt_cb.
  avio: AVIO_ prefixes for URL_ open flags.
  proto: introduce listen option in tcp
  doc: clarify configure features
  proto: factor ff_network_wait_fd and use it on udp

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

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

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

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

Idea borrowed from mplayer.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fix compilation on systems without poll()

And hide request_channels AVOption under it.

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

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

move PRI_GUID, ARG_GUID, AVCodecGuid, ff_codec_guid_get_id, MEDIASUBTYPE_BASE_GUID and audio_guids[] to riff.c/h (add FF_ prefix to PRI_GUID, ARG_GUID, and MEDIASUBTYPE_BASE_GUID; rename audio_guids to ff_codec_wav_guids)
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

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

"row" and "column" term positions in the explanation were inverted.
Signed-off-by: Stefano Sabatini <stefano.sabatini-lala@poste.it>