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* commit 'c5c663541739cb813a2a5668ee8339b535b35d7d':
  doc: add dash muxer

Merged-by: Rodger Combs <rodger.combs@gmail.com>
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Rodger Combs 2017-09-26 14:13:54 -03:00 committed by James Almer
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@ -194,6 +194,68 @@ Used to facilitate seeking; particularly for HTTP pseudo streaming.
@end table
@end table
@anchor{dash}
@section dash
Dynamic Adaptive Streaming over HTTP (DASH) muxer that creates segments
and manifest files according to the MPEG-DASH standard ISO/IEC 23009-1:2014.
For more information see:
@itemize @bullet
@item
ISO DASH Specification: @url{http://standards.iso.org/ittf/PubliclyAvailableStandards/c065274_ISO_IEC_23009-1_2014.zip}
@item
WebM DASH Specification: @url{https://sites.google.com/a/webmproject.org/wiki/adaptive-streaming/webm-dash-specification}
@end itemize
It creates a MPD manifest file and segment files for each stream.
The segment filename might contain pre-defined identifiers used with SegmentTemplate
as defined in section 5.3.9.4.4 of the standard. Available identifiers are "$RepresentationID$",
"$Number$", "$Bandwidth$" and "$Time$".
@example
ffmpeg -re -i <input> -map 0 -map 0 -c:a libfdk_aac -c:v libx264
-b:v:0 800k -b:v:1 300k -s:v:1 320x170 -profile:v:1 baseline
-profile:v:0 main -bf 1 -keyint_min 120 -g 120 -sc_threshold 0
-b_strategy 0 -ar:a:1 22050 -use_timeline 1 -use_template 1
-window_size 5 -adaptation_sets "id=0,streams=v id=1,streams=a"
-f dash /path/to/out.mpd
@end example
@table @option
@item -min_seg_duration @var{microseconds}
Set the segment length in microseconds.
@item -window_size @var{size}
Set the maximum number of segments kept in the manifest.
@item -extra_window_size @var{size}
Set the maximum number of segments kept outside of the manifest before removing from disk.
@item -remove_at_exit @var{remove}
Enable (1) or disable (0) removal of all segments when finished.
@item -use_template @var{template}
Enable (1) or disable (0) use of SegmentTemplate instead of SegmentList.
@item -use_timeline @var{timeline}
Enable (1) or disable (0) use of SegmentTimeline in SegmentTemplate.
@item -single_file @var{single_file}
Enable (1) or disable (0) storing all segments in one file, accessed using byte ranges.
@item -single_file_name @var{file_name}
DASH-templated name to be used for baseURL. Implies @var{single_file} set to "1".
@item -init_seg_name @var{init_name}
DASH-templated name to used for the initialization segment. Default is "init-stream$RepresentationID$.m4s"
@item -media_seg_name @var{segment_name}
DASH-templated name to used for the media segments. Default is "chunk-stream$RepresentationID$-$Number%05d$.m4s"
@item -utc_timing_url @var{utc_url}
URL of the page that will return the UTC timestamp in ISO format. Example: "https://time.akamai.com/?iso"
@item -adaptation_sets @var{adaptation_sets}
Assign streams to AdaptationSets. Syntax is "id=x,streams=a,b,c id=y,streams=d,e" with x and y being the IDs
of the adaptation sets and a,b,c,d and e are the indices of the mapped streams.
To map all video (or audio) streams to an AdaptationSet, "v" (or "a") can be used as stream identifier instead of IDs.
When no assignment is defined, this defaults to an AdaptationSet for each stream.
@end table
@anchor{framecrc}
@section framecrc