Threads Opus in MP4
Opus in MP4 is not in threads's documented upload list. Convert before uploading.
Quality impact not documented · OPUS inside MP4 is not in threads's documented upload list.
non-standard mux; some recent builds accept it but it is not a default creator pair. Negative claim inferred from the absence of opus/mp4 in threads's documented media list. No transcoding claim made.
Choose a compatible conversion →ISO/IEC 14496-12 (ISO Base Media File Format) (verified 2026-09-18) · Threads Publishing Reference (verified 2026-09-18)
Frequently asked
Does Threads support Opus in MP4?
Opus in MP4 is not in threads's documented upload list. Convert before uploading. Koldflux's compatibility engine reaches this verdict from sourced platform documentation.
Should I convert Opus in MP4 for Threads?
OPUS inside MP4 is a non-standard mux; convert to H264 inside MP4 for safe upload to threads.
Will Threads re-encode my file?
OPUS inside MP4 is not in threads's documented upload list.