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Decoding "out of order" video frames (B-frames) #7

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@steveanton

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@steveanton

Many video codecs support B-frames, frames which have dependencies on previous and future (chronological) frames. Some decoders want to be fed packet in the decoder order (e.g., the future I-frame is fed before the B-frame that depends on it) while others will take care of buffering and reordering internally.

This is a tracking issue for sketching how the WebCodecs API supports B-frames.

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