Create an HDS (HTTP Dynamic Streaming) stream out of an existing H.264/AAC stream. HDS is used to stream standard MP4 media over regular HTTP connections. HDS is a new technology developed by Adobe in response to HLS from Apple.

API Parameter Table

Parameter Name Type Mandatory Default Value Description
localStreamNames string true null The stream(s) that will be used as the input. This is a comma-delimited list of active stream names (local stream names)
targetFolder string true null The folder where all the manifest (.f4m) and fragment (f4v) files will be stored. This folder must be accessible by the HDS clients. It is usually in the web-root of the server
bandwidths integer false 0 The corresponding bandwidths for each stream listed in localStreamNames. Again, this can be a comma-delimited list
chunkBaseName string false f4v The base name used to generate the fragments. The default value follows this format: f4vSeg1-FragXXX
chunkLength integer false 10 The length (in seconds) of fragments to be made. Minimum value is 1 (second)
chunkOnIDR boolean false true If true, chunking is performed ONLY on IDR. Otherwise, chunking is performed whenever chunk length is achieved
groupName string false (if not specified, it will be a random name in the form of hds_group_xxxx) The name assigned to the HDS stream or group. If the localStreamNames parameter contains only one entry and groupName is not specified,groupName will have the value of the input stream name
keepAlive boolean false true If true, the EMS will attempt to reconnect to the stream source if the connection is severed
manifestName string false defaults to stream name if false The manifest file name
overwriteDestination boolean false true If true, it will allow overwrite of destination files
playlistType string false appending Either appending or rolling. Appending playlist will create a playlist continuously while rolling playlist will depend on the playListLength.
playlistLength integer false 10 The number of fragments before the server starts to overwrite the older fragments. Used only whenplaylistType is rolling. Ignored otherwise
staleRetentionCount integer false If not specified, it will have the value of playlistLength How many old files are kept besides the ones present in the current version of the playlist. Only applicable for rolling playlists
createMasterPlaylist boolean false true If true, a master playlist will be created
cleanupDestination boolean false false If true, all manifest and fragment files in the target folder will be removed before HDS creation is started

API Call Template

createHDSStream localStreamname=<localStreamName> targetfolder=<webrootFolder> groupname=<groupName>

Sample API Call

createHDSStream localstreamnames=testpullStream targetfolder=/var/evo-webroot groupname=testHDS playlisttype=rolling

Success Response in JSON

{
"data":{
    "bandwidths":[0],
    "chunkBaseName":"f4v",
    "chunkLength":10,
    "chunkOnIDR":true,
    "cleanupDestination":false,
    "configIds":[9],
    "createMasterPlaylist":true,
    "groupName":"testHDS",
    "keepAlive":true,
    "localStreamNames":["testpullStream"],
    "manifestName":"",
    "overwriteDestination":true,
    "playlistLength":10,
    "playlistType":"rolling",
    "staleRetentionCount":10,
    "targetFolder":"\/var\/evo-webroot",
},
"description":"HDS stream created",
"status":"SUCCESS"
}

JSON Response

The JSON response contains the following details:

  • data – The data to parse
    • bandwidths – An array of integers specifying the bandwidths used for streaming
    • chunkBaseName – The base name or prefix used for naming the output HDS chunks
    • chunkLength – The length (in seconds) of each playlist element (.f4m files)
    • chunkOnIdr – If true, chunking was made on IDR boundary
    • cleanupDestination – If true, HDS files at the target folder were deleted before HDS creation began
    • configIds - The configuration IDs for this command
    • createMasterPlaylist – If true, a master playlist is created
    • groupName – The name of the target folder where HDS files will be created
    • keepAlive – If true, the stream will attempt to reconnect if the connection is severed
    • localStreamNames – An array of local names for the streams
    • manifestName – The file name of the manifest file (*.f4m). If blank, defaults to stream name
    • overwriteDestination – If true, overwriting of destination files during HDS creation is allowed
    • playlistLength – The number of fragments before the server starts to overwrite the older fragments. Useful only for rolling playlist
    • playlistType – Either appending or rolling
    • staleRetentionCount – The number of old files kept besides the ones listed in the current version of the playlist. Only applicable for rolling playlist
    • targetFolder – The folder where all the manifest (.f4m) and fragment (f4v) files are stored
  • description – Describes the result of parsing/executing the command
  • status – SUCCESS if the command was parsed and executed successfully, FAIL if not.

Notes

  • If you wan’t your playlist to start at the very beginning, issue the createHDSStream first before pullStream command
  • If using autoHDS, take note that the following parameter values will not be modified:
    • keepAlive - will always be false
    • cleanupDestination - will always be true
    • createMasterPlaylist - will always be false
    • overwriteDestination - will always be true
    • playlistType - will always be “rolling”