MC Live Encoder 4.2 Release Notes

***Olga Bulava*** · 2025-08-12, 10:38 AM

New Features and Major Improvements in MainConcept Live Encoder V4.2

MPEG-DASH output now supports multi-audio tracks.
Dolby Digital (AC-3) and Dolby Digital Plus (E-AC-3) support for decoding on ingest for HTTP, RTSP, SRT, UDP and Zixi outputs.
Input audio source with E-AC-3 can now be passed unmodified through the encoder to the Transport Stream, DASH and HLS outputs.
Web UI now includes controls for hitless switching of the license server.
Added functionality to disable HTTP authentication for WebDAV servers.
New frame rate conversion algorithm allows more accurate insertion of ads.
It is now possible to select an appropriate channel mapping layout for each audio codec.
Added functionality to enable time-based addressing for the DASH segment template via the configuration file.
MPEG-H encoder has been updated to v04.02 with functionality to set RAP on demand for more accurate ad insertion.
Updated LCEVC libraries introducing enhanced performance for LCEVC and VVC.
Performance levels for LCEVC and the base codec are now managed through a single control.
RTSP ingest no longer has time limitations when receiving a signal in the demo build.
Installer can detect and install missing Avahi libraries for AWS Linux.
REST API requests can be used for multiple encoders managed by one web service.
Wibu CodeMeter has been updated to version 8.30, resolving issues with random license service stoppages on some versions of Windows. Existing previously activated licenses are unaffected by this change and will continue to function.
Added option to store all MPEG-DASH manifest files and media segments in a single directory without subfolders.

Known Issues in MainConcept Live Encoder V4.2

[NDE-151] Start/stop encoding causes the encoder to behave unpredictably when no disk space is available and, as a result, may not produce any output signal.
[NDE-261/NDE-280] When using a two-second segment size for HLS creation with either AVC/H.264 or HEVC/H.265 hardware or software encoding, the peak bitrate sometimes exceeds the bandwidth specified in the HLS master playlist by more than 20%. There is no problem when using 4 or 6 second segment sizes.
[NDE-409] Occasional frame drops when doing HEVC 8K 60p 10-bit liveencoding on Linux.
[NDE-462] It is currently not possible to insert logos with a bit depth of 8-bit or less.
[B-83199] Closed Captions information is not written into MPEG-DASH manifest and HLS playlist files. This can be corrected by a separate packaging tool.
[NDE-524] There is a memory leak after stopping streaming of LCEVC streams on Linux. This memory is reused if streaming is restarted.