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Ah, time bases relate to objects! So, can there be multiple time bases in a scene?

April 26, 2017ah bases objects relate scene time

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Ah, time bases relate to objects! So, can there be multiple time bases in a scene?

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Indeed, different audio-visual objects may have different OTBs. MPEG-4 permits presentation of multiple objects encoded using different OTBs. However, in that case a tight synchronization between such objects may not be possible. Therefore it can be anticipated that some application scenarios (e.g. broadcast) may want to restrict content to just one single time base.