parcat broken after slice header changes (JVET-Q0775)

[ksuehring]

parcat needs to be updated with any HLS changes that affect reading and patching of POC.

Since a new syntax element was added to the slice header, parcat now fails for streams generated after the merge of !1255

[jonatan]

Thanks Karsten for reporting on the problem. I have started to look into how to address it.

Since PH can now be signalled in SH, parsing to the current location of POC LSB in the SH in the software would mean parsing through an entire PH in parcat. However, it was decided at the meeting to move POC LSB from SH to PH (recorded as decision on JVET-Q0115 and included in the PH text changes in JVET-Q0819).

I'm working on implementing the move of POC from SH to PH and update parcat accordingly.

Thus, my current thinking is to focus on that integration instead of implementing a temporary solution to parse through the entire PH in parcat. Please let me know if you disagree with this approach or have suggestions for a different (better) process for addressing the issue.

Best Regards Jonatan

[ksuehring]

I think it's OK to fix parcat with the POC change. Asking to implement parsing of the whole PH seems unreasonable when POC is getting moved anyway.

[jonatan]

A merge request for moving POC to PH has been submitted as !1300. The MR also includes modifications to parcat to operate with POC LSB signaled in PH.

[ksuehring]

I merged !1300