Time difference in stream time base units from the pts of this
packet to the point at which the output from the decoder has converged
independent from the availability of previous frames. That is, the
frames are virtually identical no matter if decoding started from
the very first frame or from this keyframe.
Is AV_NOPTS_VALUE if unknown.
This field is not the display duration of the current frame.
This field has no meaning if the packet does not have AV_PKT_FLAG_KEY
set.
The purpose of this field is to allow seeking in streams that have no
keyframes in the conventional sense. It corresponds to the
recovery point SEI in H.264 and match_time_delta in NUT. It is also
essential for some types of subtitle streams to ensure that all
subtitles are correctly displayed after seeking.
Time difference in stream time base units from the pts of this packet to the point at which the output from the decoder has converged independent from the availability of previous frames. That is, the frames are virtually identical no matter if decoding started from the very first frame or from this keyframe. Is AV_NOPTS_VALUE if unknown. This field is not the display duration of the current frame. This field has no meaning if the packet does not have AV_PKT_FLAG_KEY set.
The purpose of this field is to allow seeking in streams that have no keyframes in the conventional sense. It corresponds to the recovery point SEI in H.264 and match_time_delta in NUT. It is also essential for some types of subtitle streams to ensure that all subtitles are correctly displayed after seeking.