The Options field was a single line text input, so a list of options had to
be typed as one comma separated run. Make it a textarea, sized to the number
of entries it already holds, so each option can go on its own line.
Nothing needs to parse this: both consumers already take a set of separator
characters, they were just never given the newlines.
av_dict_parse_string() (Ffmpeg) and Split() (Libvlc) both skip empty
entries, so a blank line, crlf, or a trailing newline all work, and comma
separated values keep working unchanged.
The separator set is a named constant rather than a literal at each call
site so the tests exercise the value the cameras actually pass - with a
literal they would keep passing if a call site were reverted. Verified by
setting it back to "," which fails both test cases.
Add a "realtime=1" (alias "re=1") ffmpeg input option, modeled on the
existing "loop" option and equivalent to ffmpeg's -re flag. When set on a
file source, FfmpegCamera throttles packet delivery to the rate implied by
the stream timestamps instead of reading the file as fast as possible.
The option is parsed out of the ffmpeg Options string in OpenFfmpeg and
consumed so it is not passed to the demuxer or decoder. Capture() anchors
wall-clock time to the first delivered packet and sleeps before each
subsequent packet so it is not delivered ahead of schedule. Pacing uses dts
(monotonic in read order) with a pts fallback, runs after the existing
drop/jump filters, and re-anchors on backward jumps or gaps beyond a 10s cap
to avoid stalling on a discontinuity. Works alongside loop, whose
offset-adjusted timestamps stay monotonic across restarts.
The pacing decision is factored into a pure ComputeRealtimePace() function
and unit-tested in tests/zm_ffmpeg_camera.cpp (8 cases covering full/partial
interval waits, behind-schedule, on-schedule, backward jump, over-cap, and
the cap boundary).
Ported from the ai_server branch onto master's OpenFfmpeg structure.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Isaac Connor