This prepares for assembly optimisations by moving the most
time-consuming loops to functions called through pointers
in a new context.
Signed-off-by: Mans Rullgard <mans@mansr.com>

In this mode, no seeks will be done except for within moov/moof
fragments, which should fit within the AVIOContext buffer.

This allows pushing live smooth streaming format data to
a live publishing point on IIS over http.
Signed-off-by: Martin Storsjö <martin@martin.st>

This metadata is required for pushing a live stream to an IIS
publishing point.
Signed-off-by: Martin Storsjö <martin@martin.st>

Earlier, calling avcodec_encode_audio worked fine even if time_base
wasn't set. Now it crashes due to trying to scale the output pts to
the codec context time base. This affects e.g. VLC.

If no time_base is set for audio codecs, set it to the sample
rate.

CC: libav-stable@libav.org
Signed-off-by: Martin Storsjö <martin@martin.st>

Signed-off-by: Justin Ruggles <justin.ruggles@gmail.com>

Signed-off-by: Justin Ruggles <justin.ruggles@gmail.com>

Fixes build with --enable-libspeex

Also remove now unused AVFormatParameters struct and
AVOutputFormat.set_parameters().