On Fri, 26 Apr 2024 23:36:26 GMT, Alexander Matveev <almat...@openjdk.org> wrote:
>> - Added support for #EXT-X-MEDIA tag to HTTP Live Streaming. >> - Following audio renditions via #EXT-X-MEDIA tag will be supported (see CSR >> for more details): >> - MP2T streams with one H.264/AVC video track and elementary AAC audio >> stream via #EXT-X-MEDIA tag. >> - fMP4 streams with one H.264/AVC or H.265/HEVC video track and elementary >> AAC audio stream via #EXT-X-MEDIA tag. >> - fMP4 streams with one H.264/AVC or H.265/HEVC video track and fMP4 >> streams with one AAC audio track via #EXT-X-MEDIA tag. >> - Separate audio stream will be playback via separate chain of GStreamer >> elements inside one pipeline. Which means two "javasource" elements will be >> used inside one pipeline and they will be reading data independently of each >> other via two separate HLSConnectionHolders. GStreamer will handle audio and >> video synchronization based on PTS as for other streams. Other solutions >> were considered such as one "javasource" with multiple source pads, but such >> implementation will be more complex and does not provide any benefits. >> - HLSConnectionHolder which handles video stream will also parse all >> information for separate audio stream and then create child >> HLSConnectionHolder for separate audio stream which will be responsible for >> downloading audio segments and seek of audio streams. >> - Parser in HLSConnectionHolder was reworked to make it more readable and >> easy to maintain and extend. >> - JavaDoc updated to point to latest HLS implementation vs old draft. It >> also updated with information on #EXT-X-MEDIA tag. Also, added missing >> information on AAC elementary streams and fMP4 from previous fixes. >> - Fixed and improved debug output in Linux AV plugins. >> - Added new property to "dshowwrapper" to disable PTS reset for each new >> segment, since with #EXT-X-MEDIA tag audio and video segments are not align >> and they can start at different time. >> - Fixed missing PTS on first buffer after seek in MP2T demuxer in >> "dshowwrapper". Without it audio and video synchronization breaks with two >> separate streams. >> - Removed dead code from MediaManager. >> - Added handling for GST_MESSAGE_LATENCY. Based on GStreamer doc we need to >> call gst_bin_recalculate_latency() when such message received. Not sure if >> we really need to do this, but with separate video and audio streams we do >> receive this message when seek is done. Most likely due to video and audio >> is not align perfectly when we seek. For other streams this message is not >> received in most cases. > > Alexander Matveev has updated the pull request incrementally with one > additional commit since the last revision: > > 8282999: Add for support EXT-X-MEDIA tag in HTTP Live Streaming [v2] 8282999: Add for support EXT-X-MEDIA tag in HTTP Live Streaming [v3] - Fixed NULL check in Locator. - Declared HLSConnectionHolder helper classes and static nested classes. ------------- PR Comment: https://git.openjdk.org/jfx/pull/1435#issuecomment-2101574260
