Introduction to ew-vodingest

The ew-vodingest command may be used to perform either VoD ingest or to perform live recordings from an ew-live-ingest (esb3003) circular buffer.

VoD ingest

ew-vodingest (ESB3021) reads and ingests an MP4/ts audio and video + subtitles asset defined by a SMIL file into an ESF (Edgeware Storage Format) asset in a way that is compatible with the DASH OnDemand profile. A corresponding DASH MPD file is generated. The SMIL-file syntax and usage is explained in the SMIL section.

It is also possible to specify a .ts-file, an .mp4-file or a directory-path as input.

For example:

ew-vodingest --input hitchcock/vertigo/index.smil --output esf/vertigo

Note: A main focus of this tool is to ingest VoD content that can be used to generate live content by combining VoD assets using ESB3019 ew-vod2cbm. There is therefore a restriction on the ingested content that it must be possible to discover a common constant GoP duration (sync-frame distance) for all video tracks, and that all sample durations are exactly the same in their respective timescales. The timescales may differ, but only by integer factors, for example 50 for 50Hz video and 25 for 25Hz video.

Codec and input format

Please refer to Supported codecs to get more information.

Input locations

This tables shows the possible combinations of input types and locations:

DASH On-Demandyesyesyes
Unencrypted ISM/MSSyesyesyes

For ingesting large assets (or for slow locations) the --maxtime command-line parameter can be used to increase the timeout threshold.

Output locations

Output locations can always be local filesystem, or network locations, as above. By default the content_id in content_info.json of the output asset will equal the output directory. This can be overridden by specifying any other ID with the --content-id command-line parameter.

Live recordings

The input for live recordings is an ew-live-ingest (esb3003) with a circular buffer available on the instance specified by --host and --port (default localhost:8090). The output locations are the same as for VoD ingest above.

The --cbm flag triggers a live recording (and cannot be combined with --i). The start/stop times are specified in epoch seconds, and must be in the past. The recording will consist of integral segments, matching the specified time range as closely as possible. The time-stamps in the resulting VoD will be shifted to start from zero. Any “holes” in the specified intervals will be removed, thus resulting in a recording shorter than the specified interval.

SCTE-35 markers are transferred from the CBM interval and stored in a separate file.

For example:

ew-vodingest --cbm --start-epoch 1678190071 --stop-epoch 1678190099 --channel tv1 -o tv1-mar-7-2023


ew-vodingest is a command-line tool that is run as:

ew-vodingest [options]

Run as ew-vodingest [options]

-i, --input string               SMIL file, dir or file pattern defining the asset (mandatory)
-o, --output string              output directory (mandatory)
-w, --minseg int                 minimum output segment duration (milliseconds) (default 4000)
-y, --maxseg int                 maximum output segment duration (milliseconds) (default 12000)
    --cbm                        set to use esf export from cbm
    --start-epoch uint           recording start time given in epoch seconds. Only works with --cbm
    --stop-epoch uint            recording stop time given in epoch seconds. Only works with --cbm
    --channel string             channel name to record from. Only works with --cbm
    --drop-non-aligned-track     drop track with abnormal segment duration. Only works with --cbm
-c, --content-id string          explicit content-id (instead of ingest path)
-m, --maxtime int                maximal execution time to ingest asset (seconds) (default 1800)
    --hls                        output HLS playlists (experimental)
    --slim                       only output content_info and dat files
    --leavepartial               leave partial ingested content on failure
    --s3file string              path to S3 credentials file
-t, --template string            path to content template file, for asset comapatibility verification
    --licensefile string         license file path (default "/etc/edgeware/ew-vodingest/license.json")
-l, --logfile string             log file [default stdout]
    --log-file string            see above
    --logformat string           format and type of log: [consolejson consolepretty discard] (default "consolepretty")
    --loglevel string            initial log level (default "info")
-v, --version                    print version and date
    --host string                cbm host to connect to. Only works with --cbm (default "localhost")
    --port uint16                cbm port to connect to. Only works with --cbm (default 8090)
    --source-rate-limit uint32   maximum read rate in Mbps from source. Only works with --cbm. Setting 0 will disable source rate limiting
    --help                       extended tool help

The following options -i, -o, -w, -y, --cbm, --start-epoch, --stop-epoch, --channel, -l, --source-rate-limit are the same as for the ESB3005 ew-recorder.