✳ CODEC COMPATIBILITY
Threads AV1 in MP4
threads accepts AV1 in MP4; expect server-side transcoding, which can lower the final rendition.
Medium quality risk · AV1 inside MP4 not specifically documented for Threads.
AV1 inside MP4 (with the av01 sample entry) is the modern open-codec upload pair. Recent builds may accept.
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 AV1 in MP4?
threads accepts AV1 in MP4; expect server-side transcoding, which can lower the final rendition. Koldflux's compatibility engine reaches this verdict from sourced platform documentation.
Should I convert AV1 in MP4 for Threads?
AV1 inside MP4 is not the recommended upload for threads; H264 inside MP4 is.
Will Threads re-encode my file?
AV1 inside MP4 not specifically documented for Threads.