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# flashls An Open-source HLS Flash plugin that allows you to play HLS streams. The plugin is compatible with the following players: - [Flowplayer](#flowplayer) 3.2.12 - [OSMF 2.0](#strobe-media-playback-smp-and-other-osmf-based-players) based players (such as SMP and GrindPlayer) - [Video.js][1] 4.6, 4.7, 4.8 (adaptation done here [https://github.com/mangui/video-js-swf][2]) - [MediaElement.js][3] (adaptation done here [https://github.com/mangui/mediaelement][4], now integrated in official MediaElement.js release since 2.15.0) ## Features - VoD & Live playlists - Sliding window (aka DVR) support on Live playlists - Adaptive streaming - Manual & Auto switching - Serial segment fetching method from http://www.cs.tut.fi/~moncef/publications/rate-adaptation-IC-2011.pdf - Configurable seeking method on VoD & Live - Accurate seeking to exact requested position - Key frame based seeking (nearest key frame) - Segment based seeking (beginning of segment) - Timed Metadata for HTTP Live Streaming (in ID3 format, carried in MPEG2-TS, as defined in https://developer.apple.com/library/ios/documentation/AudioVideo/Conceptual/HTTP_Live_Streaming_Metadata_Spec/HTTP_Live_Streaming_Metadata_Spec.pdf) - AES-128 decryption - Buffer progress report - Error resilience - Retry mechanism on I/O errors - Recovery mechanism on badly segmented TS streams ### Supported M3U8 tags - `#EXTM3U` - `#EXTINF` - `#EXT-X-STREAM-INF` (Multiple bitrate) - `#EXT-X-ENDLIST` (VoD / Live playlist) - `#EXT-X-MEDIA-SEQUENCE` - `#EXT-X-TARGETDURATION` - `#EXT-X-DISCONTINUITY` - `#EXT-X-DISCONTINUITY-SEQUENCE` - `#EXT-X-PROGRAM-DATE-TIME` (optional, used to synchronize time-stamps and sequence number when switching from one level to another) - `#EXT-X-KEY` (AES-128 method supported only) - `#EXT-X-BYTERANGE` ## Configuration The plugin accepts several **optional** configuration options, such as: - `hls_debug` (default false) - Toggle _debug_ traces, outputted on JS console - `hls_debug2` (default false) - Toggle _verbose debug_ traces, outputted on JS console - `hls_minbufferlength` (default -1) - Minimum buffer length in _seconds_ that needs to be reached before playback can start (after seeking) or restart (in case of empty buffer) - If set to `-1` some heuristics based on past metrics are used to define an accurate value that should prevent buffer to stall - `hls_lowbufferlength` (default 3) - Low buffer threshold in _seconds_. When crossing down this threshold, HLS will switch to buffering state, usually the player will report this buffering state through a rotating icon. Playback will still continue. - `hls_maxbufferlength` (default 60) - Maximum buffer length in _seconds_ (0 means infinite buffering) - `hls_startfrombitrate` (default -1) - If greater than 0, specifies the preferred bitrate to start with. - If -1, and hls_startfromlevel is not specified, automatic start level selection will be used. - This parameter, if set, will take priority over hls_startfromlevel. - `hls_startfromlevel` (default -1) - from 0 to 1 : indicates the "normalized" preferred bitrate. As such, - if 0, lowest non-audio bitrate is used, - if 1, highest bitrate is used, - if 0.5, the closest to the middle bitrate will be selected and used first. - -1 : automatic start level selection, playback will start from level matching download bandwidth (determined from download of first segment) - `hls_seekfromlevel` (default -1) - If set to true, playback will start from lowest non-audio level after any seek operation. If set to false, playback will start from level used before seeking - from 0 to 1 : indicates the "normalized" preferred bitrate. As such, - if 0, lowest non-audio bitrate is used, - if 1, highest bitrate is used, - if 0.5, the closest to the middle bitrate will be selected and used first. - -1 : automatic seek level selection, keep level before seek. - `hls_live_flushurlcache` (default false) - If set to true, Live playlist will be flushed from URL cache before reloading (this is to workaround some cache issues with some combination of Flash Player / IE version) - `hls_seekmode` (default: "KEYFRAME") - "ACCURATE" - Seek to exact position - "KEYFRAME" - Seek to last keyframe before requested position - "SEGMENT" - Seek to beginning of segment containing requested position - `hls_manifestloadmaxretry` (default -1): max number of Manifest load retries after I/O Error. - if any I/O error is met during initial Manifest load, it will not be reloaded. an HLSError will be triggered immediately. - After initial load, any I/O error will trigger retries every 1s,2s,4s,8s (exponential, capped to 64s). please note specific handling for these 2 values : - 0, means no retry, error message will be triggered automatically - -1 means infinite retry - `hls_keyloadmaxretry` (default -1): max number of key load retries after I/O Error. * any I/O error will trigger retries every 1s,2s,4s,8s (exponential, capped to 64s). please note specific handling for these 2 values : * 0, means no retry, error message will be triggered automatically * -1 means infinite retry - `hls_fragmentloadmaxretry` (default -1): max number of Fragment load retries after I/O Error. * any I/O error will trigger retries every 1s,2s,4s,8s (exponential, capped to 64s). please note specific handling for these 2 values : * 0, means no retry, error message will be triggered automatically * -1 means infinite retry - `hls_capleveltostage` (default false) : limit levels usable in auto-quality by the stage dimensions (width and height) - true : level width and height (defined in m3u8 playlist) will be compared with the player width and height (stage.stageWidth and stage.stageHeight). Max level will be set depending on the `hls_maxlevelcappingmode` option. Note: this setting is ignored in manual mode so all the levels could be selected manually. - false : levels will not be limited. All available levels could be used in auto-quality mode taking only bandwidth into consideration. - `hls_maxlevelcappingmode` (default downscale) : defines the max level capping mode to the one available in HLSMaxLevelCappingMode: - "downscale" - max capped level should be the one with the dimensions equal or greater than the stage dimensions (so the video will be downscaled) - "upscale" - max capped level should be the one with the dimensions equal or lower than the stage dimensions (so the video will be upscaled) - `hls_usehardwarevideodecoder` (default true) : enable/disable hardware video decoding. it could be useful to workaround hardware video decoding issues. ## Examples : * http://www.flashls.org/latest/examples/chromeless * http://www.flashls.org/latest/examples/osmf/GrindPlayer.html * http://www.flashls.org/latest/examples/osmf/StrobeMediaPlayback.html * http://www.flashls.org/latest/examples/flowplayer/index.html * http://www.flashls.org/mediaelement/demo/mediaelementplayer-hls.html * http://www.flashls.org/videojs/flash_demo.html ## Usage - Download flashls from https://github.com/mangui/flashls/releases - Unzip, extract and upload the appropiate version to your server - In the `examples` directory you will find examples for ChromelessPlayer, Flowplayer, Strobe Media Playback (SMP) and GrindPlayer ### Setup --- #### Flowplayer FlowPlayer/flashls setup is described here : http://flash.flowplayer.org/plugins/streaming/flashls.html please also refer to example below if you want to use specific configuration options: ```javascript flowplayer("player", 'http://releases.flowplayer.org/swf/flowplayer-3.2.12.swf', { // Flowplayer configuration options // ... plugins: { httpstreaming: { // flashls configuration options url: 'flashlsFlowPlayer.swf', hls_debug: