MC Live Encoder 4.0 Release Notes

***Olga Bulava*** · 2025-08-12, 10:29 AM

New Features and Major Improvements in MainConcept Live Encoder V4.0

Live preview of the input attached to the encoding job.
AC-3 pass-through for HLS output streams.
SCTE-104/35 conversion for Decklink capture cards.
SCTE-35 signaling for TS over IP protocols (HTTP, UDP, SRT and Zixi).
SCTE-35 signaling for HLS and DASH playlists.
MPEG-H audio support in HLS.
Flexible configuration of date and time placeholders for HLS and DASH media segment file names.
Intel Quick Sync Video encoding is now also available for Linux.
Live Encoder now requires Rocky 8 or RHEL 8 on Linux, dropping support for CentOS 7 and RHEL 7.
VVC/H.266 and VVC/H.266+LCEVC encoding speed has been significantly improved.
Uploading to WebDAV is now possible to both Nginx and Apache servers.

Known Issues in MainConcept Live Encoder V4.0

[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.