Question: In MBMS streaming delivery using H.264 (AVC), where should Sequence Parameter Sets be contained if taken into use or updated within the RTP stream?
Option 1: Only in the SDP description of the stream
Option 2: Randomly selected access units within the RTP stream
Option 3: Each IDR access unit and each access unit including a recovery point SEI message where the Sequence Parameter Set is used
Option 4: The first access unit of every GOP (Group of Pictures) in the RTP stream
Explanation: This is because, according to best practices for H.264 (AVC) in MBMS, if a sequence parameter set is taken into use or updated within the RTP stream, it should be contained at least in each IDR (Instantaneous Decoding Refresh) access unit and each access unit including a recovery point SEI (Supplemental Enhancement Information) message, where the sequence parameter set is used in the decoding process. This ensures seamless decoding and minimizes errors in the video stream.