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...and remove the doctype property from matroskamux again.

  Speex should report 30 ms latency for narrowband mode, 34 otherwise.
  Fixes #619018

In this day and age this should be safe. There's otherwise a risk people
will be creating unneccessarily big WebM files as they can't use
SimpleBlock in v1.

The original plan was to let WebM v1 be the same as Matroska v2 (with
extra constraints), but for simplicity it was decided to handle the
versions equally, such that e.g. SimpleBlock is only allowed in WebM v2.

Failure to do this for corrupt input can cause a subbuffer bigger
than the actual buffer to be created, quickly leading to segfault.
Test case:
bug_s222005751_r0.001____memcpy.webm

The comment says this cannot happen, but it did and I don't know
why. This is not the correct fix, needs investigation. Test case:
bug_s555010094_r0.0005:0.008____IA__g_assertion_message_expr.webm

This is a regression from ASCII validation changes. Test case:
bug_s66876390_r0.001____malloc_printerr.webm

This was triggering an UTF-8 assertion in gst_caps_set_simple for
corrupt files with garbage as codec id. Test case:
gstreamer_error_trying_to_set_invalid_utf8_as_codec_id.webm

Old gst_ebml_read_ascii renamed to gst_ebml_read_string, also used by
gst_ebml_read_utf8. Unlike for UTF-8, failure to validate is an error,
as gst_ebml_read_ascii is used for reading doctype and codec id and we
might just as well give up early in those cases.

Because GstMatroskaTrackContext *stream is set up in the first
SimpleBlock or Block, a rogue CodecState otherwise causes a segfault on
derefencing the NULL pointer. Test case:
bug_s5506167_r0.001____gst_matroska_demux_parse_blockgroup_or_simpleblock.webm

...matroskademux automatically supports it through libgstriff.

...avidemux automatically supports it through libgstriff.

From 4d67bd6 to 357b0db

Unref server objects when done. Fixes check-valgrind.

Don't leak othercaps or jpegenc ref.

Documentation error spotted by tony <caicai0119 at gmail.com>

Fixes #618419

It probably will not be in the final RFC as it is not in RFC 5215 for Vorbis.
If there is a configuration specified, assume it is in-line and if nothing is
specified, assume it is in-band.

https://bugzilla.gnome.org/show_bug.cgi?id=618386

We can perfectly decode 1x1 images so lower the min width and height to 1.

Fixes #618392

Don't blindly add the durations of incomming buffers to the total queued
duration because it might be invalid. Mark the total queued duration invalid
when we receive an invalid incomming timestamp because that's when we lose track
of the total queued duration.

Fixes #618324

... so it can also be regularly inserted into the stream if so configured.

Fixes #617164.

Remove fixed FIXME, change finalise to finalize for consistency.

Hook up build infrastructure, docs and tests.

Fixes #614305.

OSS4 supports per-stream volume control, so expose this using the right
API, so that playbin2 and applications like totem can make use of it
(instead of using a volume element for volume control).

Fixes #614305.