Add a -frames option that uses generic stream specifiers, change
-[vad]frames into aliases to it.

It is now possible to set metadata on streams and chapters.

It should be flags, not int.

Move stream maps to it.

Eventually all non-global options should be stored in it.

This allows options like -target, which are just shortcuts for other
options, to work without dummy function for all options they invoke.

This is the first step to removing the globals plague from avtools.

This will be useful in the following commit.

Allows cmdutils to call each tool's own cleanup function.

The initial request contains "Range: 0-", which servers normally
have responded with "HTTP/1.1 206 Partial Content" reply with
a Content-Range header, which was used as indicator for seekability.

Apache, since 2.2.20, responds with "HTTP/1.1 200 OK" for these
requests, which is more friendly to caches and proxies, but the
seekability still is indicated via the Accept-Ranges: bytes header.
Signed-off-by: Martin Storsjö <martin@martin.st>

Rename write_{header,packet,trailer} to nut_write_{header,packet,trailer}
in order to make easier debugging them.

Fixes bug 28.

Replace it with newly introduced libavutil API.

It allows to search for options only with AVClass, without allocating
the corresponding context.

1<<31 overflows because 1 is signed, so force it to unsigned.
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

These caused scrambled error messages to be printed and
floating point exceptions.
For example when there was no decoder available for a
stream.
Signed-off-by: Anton Khirnov <anton@khirnov.net>

FF_API_LAME_GLOBAL_OPTIONS => FF_API_LAME_GLOBAL_OPTS

Thanks to Clément Bœsch for spotting.

Deprecate CODEC_FLAG_SVCD_SCAN_OFFSET

Deprecate CODEC_FLAG_H263P_SLICE_STRUCT

Deprecate CODEC_FLAG_OBMC

Deprecate CODEC_FLAG_H263P_AIV

Deprecate CODEC_FLAG_H263P_UMV

Deprecate CODEC_FLAG_ALT_SCAN

Deprecate CODEC_FLAG_EXTERN_HUFF

Deprecate CODEC_FLAG_PART

Deprecate CODEC_FLAG2_MEMC_ONLY