Chromium's MediaRecorder API now supports HEVC encoding, introducing the hvc1.* codec string, and adds new codecs (hev1.* and avc3.*) supporting variable resolution video in MP4. Support for HEVC platform encoding was added in WebCodecs in Chromium M130. As a follow-up, support has been added to the MediaRecorder API in Chromium. The API now supports both MP4 and Matroska muxer types with different HEVC and H.264 mime type specifications. HEVC encoding is only supported if the user's device and operating system provide the necessary capabilities.