On 2022-07-07 03:11 pm, Anton Khirnov wrote:
Quoting Gyan Doshi (2022-07-04 18:29:12)
This is a per-file input option that adjusts an input's timestamps
with reference to another input, so that emitted packet timestamps
account for the difference between the start times of the two inputs.
Typical use case is to sync two or more live inputs such as from capture
devices. Both the target and reference input source timestamps should be
based on the same clock source.
If not all inputs have timestamps, the wallclock times at the time of
reception of inputs shall be used. FFmpeg must have been compiled with
thread support for this last case.
I'm wondering if simply using the other input's InputFile.ts_offset
wouldn't achieve the same effect with much less complexity.
That's what I initially did. But since the code can also use two other
sources for start times (start_time_realtime, first_pkt_wallclock),
those intervals may not exactly match the difference between
fmctx->start_times so I use a generic calculation.
Regards,
Gyan
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