Currently, we are discarding all TS PES payload readers on seek. This is to fix
a bug that makes PES stream readers read packets inconsistently after seeking (first
time, the readers ignore all packets before PMT, second seek time after PMT is
read, the readers will read all packets before PMT).
This works fine if we don't support seeking to arbitrary position within the TS
stream. However, this may lead to a problem if we want to support seeking, because
some TS streams only have track format at the begining of the stream, and reseting
the payload readers after seeking can lead to track format not available anymore.
This change reverts the original fix (do not discard TS PES payload readers on seek
anymore). Instead, in non-HLS mode, after we have processed all PMTs packets in
the strea, we will re-seek to the beginning and perform readin again to make sure
the result will be consistent across multiple seeks. This is a prepare step to
support seeking in TS streams.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=202466233
4f57c46560