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Hi,
When I tested the pipeline
rtspsrc->rtph264depay->qtmux->filesink
I found that the captured file has every frame set as key frame in atom "stss". I probed the src pad of rtph264depay, it seems that every buffer has flag "GST_BUFFER_FLAG_DELTA_UNIT" set, and qtmux used this flag to determine whether the current frame is a sync frame or not.
Should that flag be set only for the buffer containing an IDR picture?
Another issue with the buffer outputted from rtph264depay is that duration is invalid. I am not sure whether this caused the problem in qtmux. Is the duration optional so that downstream module can infer the duration based on timestamp if needed?
Thanks,
Yiliang
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