HLS – IRT Lab

Alternative audio tracks in ARD Player

Michael Weitnauer — Mon, 20 Apr 2020 13:02:41 +0000

We’ve recently teamed up with colleagues from SWR.Online to implement alternative audio tracks in the “ARD Player” for mobile and desktop Internet browsers. This allows ARD broadcasters now to distribute alternative audio versions in addition to the default mix in an efficient manner without extra bandwidth usage. Such alternatives can be for example a “Dialog+” ...

CMAF Livestreams with Subtitles and Audio Description

Peter tho Pesch — Tue, 25 Apr 2017 11:36:42 +0000

The Common Media Application Format (CMAF) aims at unifying the two currently leading adaptive streaming standards: MPEG-DASH and Apple’s HLS. The sample live streams presented here, demonstrate the potential benefit of CMAF for future OTT IP services. With CMAF, both HLS playlists and DASH manifests are allowed to reference the same fragmented MP4 (fMP4) chunks, ...

AV-Portal Streaming Testcases

Martin Schmalohr — Wed, 25 Jan 2017 09:39:26 +0000

IRT opened an extensive repository of differently encoded Audio- and Videostreams for PC, Smartphones, Tablets and HbbTV-Devices. Launch the Testportal http://avtest.irt.de Various test cases are presented in a user interface as progressive download and adaptiv for MPEG-DASH, Apple HLS and Adobe HDS in multiple encodings (H.264, H.265, HE/AAC, E/AC3), container formats (MP4, MPEG-TS) and resolutions ...