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Chapter 3 ’Web User Graphical Interface’ — Workflow Library
Electra VS - Version 05.10 385
User Manual - Rev. A
Description of the Live Web TV Transcoder Predefined Favorite
Workflow
This workflow generates one or several WebTV outputs from a TS over
IP input.
 Video is transcoded in H.264, HEVC. Up to 12 video profiles can be
generated. The video parameters can be configured globally or per
profile.
 Audio is transcoded into AAC.
 Available outputs: HLS, MPEG-DASH, RTMP, Smooth Streaming, or TS
(for an external packager). When several outputs are defined, you can
choose, for each video profile, which outputs will use it.

Input subtitles (Teletext and DVB-Subtitles) can be transcoded (HLS,
MPEG-DASH, Smooth Streaming) or pass-through (TS).
 HLS: the HLS stream can be available on the local web server, or
pushed to a remote origin server (and optionally its backup). DRM are
available. When a segment duration is defined, HLS chunks are based
on these segments.
 MPEG-DASH: the MPEG-DASH stream can be available on the local
web server, or pushed to a remote origin server. DRM are available.
 RTMP: the audio/video can be pushed to a Flash Media Server. There
is one stream per video profile. The audio is sent within each stream.
There are 2 modes:
 One connection per video profile (i.e. one stream per
connection).
 One connection for all the video profiles (i.e. all the streams in
the same connection).

Smooth Streaming: the Smooth Streaming stream can be available
on the local web server, or pushed to a remote IIS server (and
optionally its backup). DRM are available.
 TS: the components are sent on TS over IP. Encoder Boundary Point
(CableLabs) can be added when required by the packager. There are 3
modes:
- One SPTS is generated for each video profile. The SPTS of
the first profile also contains the audio and subtitles. All the
SPTS use the same multicast IP address.
- One SPTS with all the components is generated (i.e. several
video components, audio and subtitles in the same
program).
- One MPTS is generated, with one program per video
profile. The program of the first profile also contains the
audio and subtitles.
 Video preprocessing:
 DVB-Subtitle inserter: the DVB Subtitles are burned in the video.