During playback Airflow will transparently extract the text from picture subtitles and render it on target device just like it would with regular text subtitles.1 ENCODING LIVE AND VOD FOR HEVC/HLS A Joint SLC/RealEyes ProductionĢ Agenda Our assumptions and goals Section I: Introduction to HEVC Section II: Playback performance Section III: Introduction to HLS Section IV: Specification overview: HEVC in HLS Section V: Producing HEVC/HLSģ Assumptions and Goals Assumptions Have some knowledge of how to produce HLS presentations Goal: Teach you to add HEVC to HLS Encode HEVC Choose an HEVC encoding ladder Integrate that into an HLS presentation With FFmpeg, Bento4 and some third party tools Not a soup to nuts, here s how to do HLS sessionĤ Section I. It massively increases CPU load (think fan noise and heat) and it's completely infeasible to do for 4K videos.Įnter our new realtime subtitle text recognition (OCR). This means that the only way to render them when streaming is to burn them in the video. ![]() Some subtitles (DVD, Vobsub, Bluray) are stored as pictures. Integrated search is a cherry on top.with real time text recognition All widely used subtitle formats are supported, now including vobsub. Embedded or external, for our playback pipeline it's all the same. That involves reading the entire file upfront! Crazy, right? Airflow needs no such crude tricks. It's a bit of a secret that pretty much every other streaming software needs to extract embedded subtitle tracks before playing the video. For both embedded and external subtitles.
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