This will be used to allow writing file sequences using the tee output onto
multiple places in parallel
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Commit 9200514ad8 ("lavf: replace AVStream.codec with
AVStream.codecpar") merged in commit 6f69f7a8bf changed
avformat_find_stream_info() to put the extradata it got from
st->parser->parser->split() to st->internal->avctx instead of st->codec
(extradata in st->internal->avctx will be later copied to st->codecpar).
However, in the same function, the "is stream ready?" check was changed
to check for extradata in st->codecpar instead of st->codec, even
though st->codecpar is not yet updated at that point.
Extradata retrieved from split() is therefore not considered anymore,
and avformat_find_stream_info() will therefore needlessly continue
probing in some cases.
Fix that by checking for the extradata at st->internal->avctx where it
is actually put.
Add ff_format_output_open utility function to wrap
io_open callback of AVFormatContext structure.
Signed-off-by: Jan Sebechlebsky <sebechlebskyjan@gmail.com>
Signed-off-by: Marton Balint <cus@passwd.hu>
This ensures the AVStream->codec entry is kept in sync when new streams are
discovered mid-playback or changes to the context occur from other sources.
Fixes trac 5678.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
The internal avctx bitrate is copied into codecpar after estimate_timings()
Fixes Ticket5646
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Fixes Ticket5467 "Lossless j2k information no longer shown"
Based on suggestion by Hendrik Leppkes
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
From Libav commit 8bc4accc37ab047d2fd85d672c577b39dfc918e1, with
additional code for decoding subtitles (not present in Libav).
Signed-off-by: Anton Khirnov <anton@khirnov.net>
Broke a lot of stuff and didn't fix anything.
This reverts commit 3c461eecd48ba2cf7616d98e6f99954de3ad4b06, reversing
changes made to 884dd175f0.
Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
It will be used by text subtitle demuxers to construct format instructions
straight into extradata. They all currently a similar function that accepts
an AVCodecContext instead.
Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
Fill DTS if all packets have been read in avformat_find_stream_info, and still
has_decode_delay_been_guessed returns false.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This can be used for formats which write all format metadata as string to
files, therefore non-standard creation times such as 'now' will be parsed.
The standardized creation time is UTC ISO 8601 with microsecond precision.
Reviewed-by: wm4 <nfxjfg@googlemail.com>
Signed-off-by: Marton Balint <cus@passwd.hu>
Currently, AVStream contains an embedded AVCodecContext instance, which
is used by demuxers to export stream parameters to the caller and by
muxers to receive stream parameters from the caller. It is also used
internally as the codec context that is passed to parsers.
In addition, it is also widely used by the callers as the decoding (when
demuxer) or encoding (when muxing) context, though this has been
officially discouraged since Libav 11.
There are multiple important problems with this approach:
- the fields in AVCodecContext are in general one of
* stream parameters
* codec options
* codec state
However, it's not clear which ones are which. It is consequently
unclear which fields are a demuxer allowed to set or a muxer allowed to
read. This leads to erratic behaviour depending on whether decoding or
encoding is being performed or not (and whether it uses the AVStream
embedded codec context).
- various synchronization issues arising from the fact that the same
context is used by several different APIs (muxers/demuxers,
parsers, bitstream filters and encoders/decoders) simultaneously, with
there being no clear rules for who can modify what and the different
processes being typically delayed with respect to each other.
- avformat_find_stream_info() making it necessary to support opening
and closing a single codec context multiple times, thus
complicating the semantics of freeing various allocated objects in the
codec context.
Those problems are resolved by replacing the AVStream embedded codec
context with a newly added AVCodecParameters instance, which stores only
the stream parameters exported by the demuxers or read by the muxers.
Marton Balint
Clément Bœsch
Michael Niedermayer
Anssi Hannula
Jan Sebechlebsky
Hendrik Leppkes
Rodger Combs
Clément Bœsch
Aman Gupta
Stefano Sabatini
Chris Cunningham
wm4
Paul B Mahol
Derek Buitenhuis
Lou Logan
Sasi Inguva
Ronald S. Bultje
Anton Khirnov
Mats Peterson