Answering my own question here in case someone else stumbles into this, it turns out those streams were completely broken:
- The CC data SEI NAL units were defined after the primary coded picture which violates the H264 standard - The user data part of SEI was lacking the marker_bits (0xFF) at the end Both issues were fixed upstream by the Dash industry forum and the public samples regenerated after the report, they work correctly now in ffmpeg. Cross-reference: https://github.com/Dash-Industry-Forum/dash-live-source-simulator/issues/115 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".