pts is off for concealment errors with dat analysis

[dericed]

Am testing with https://archive.org/download/datstrue-read/multiple_reads_one_tape/HD61_imaged.hda.

A large error is reported at:

			<frame n="128919" pos="778948668" pts="01:04:27.570000" abst="01:05:32:05" full_conceal_aud="l"/>
			<frame n="131513" pos="778960312" pts="01:05:45.390000" abst="01:06:50:24" abst_r="1" full_conceal_aud="1"/>
			<frame n="131514" pos="778902092" pts="01:05:45.420000" abst="01:06:50:24" abst_r="1" full_conceal_aud="1"/>
			<frame n="131515" pos="778907914" pts="01:05:45.450000" abst="01:06:50:24" abst_r="1" full_conceal_aud="1"/>
			<frame n="131516" pos="778913736" pts="01:05:45.480000" abst="01:06:50:24" abst_r="1" full_conceal_aud="1"/>
			<frame n="131517" pos="778919558" pts="01:05:45.510000" abst="01:06:50:24" abst_r="1" full_conceal_aud="1"/>
			<frame n="131518" pos="778925380" pts="01:05:45.540000" abst="01:06:50:24" abst_r="1" full_conceal_aud="1"/>
			<frame n="131519" pos="778931202" pts="01:05:45.570000" abst="01:06:50:24" abst_r="1" full_conceal_aud="1"/>
			<frame n="131520" pos="778937024" pts="01:05:45.600000" abst="01:06:50:24" abst_r="1" full_conceal_aud="1"/>
			<frame n="131521" pos="778942846" pts="01:05:45.630000" abst="01:06:53:07" abst_nc="1" full_conceal_aud="l"/>
			<frame n="131522" pos="778948668" pts="01:05:45.660000" abst="01:06:53:08" full_conceal_aud="l"/>
			<frame n="131523" pos="778954490" pts="01:05:45.690000" abst="01:06:53:09" full_conceal_aud="l"/>
			<frame n="131524" pos="778960312" pts="01:05:45.720000" abst="01:06:53:10" full_conceal_aud="l"/>
			<frame n="131525" pos="778902092" pts="01:05:45.750000" abst="01:06:53:11" full_conceal_aud="l"/>
			<frame n="131549" pos="778919558" pts="01:05:46.470000" abst="01:06:54:01" abst_r="1" full_conceal_aud="r"/>
			<frame n="131550" pos="778925380" pts="01:05:46.500000" abst="01:06:54:01" abst_r="1" full_conceal_aud="1"/>
			<frame n="131551" pos="778931202" pts="01:05:46.530000" abst="01:06:54:01" abst_r="1" full_conceal_aud="1"/>
			<frame n="131552" pos="778937024" pts="01:05:46.560000" abst="01:06:54:01" abst_r="1" full_conceal_aud="1"/>
			<frame n="131553" pos="778942846" pts="01:05:46.590000" abst="01:06:54:01" abst_r="1" full_conceal_aud="1"/>
			<frame n="131554" pos="778948668" pts="01:05:46.620000" abst="01:06:54:01" abst_r="1" full_conceal_aud="1"/>
			<frame n="131555" pos="778954490" pts="01:05:46.650000" abst="01:06:54:01" abst_r="1" full_conceal_aud="1"/>
			<frame n="131556" pos="778960312" pts="01:05:46.680000" abst="01:06:54:01" abst_r="1" full_conceal_aud="1"/>
			<frame n="131557" pos="778902092" pts="01:05:46.710000" abst="01:06:54:01" abst_r="1" full_conceal_aud="1"/>
			<frame n="131558" pos="778907914" pts="01:05:46.740000" abst="01:06:54:01" abst_r="1" full_conceal_aud="1"/>
			<frame n="131559" pos="778913736" pts="01:05:46.770000" abst="01:06:54:01" abst_r="1" full_conceal_aud="1"/>
			<frame n="131560" pos="778919558" pts="01:05:46.800000" abst="01:06:54:01" abst_r="1" full_conceal_aud="1"/>

but the error is around 1:05:33.5. Here seen in audacity: