[FFmpeg-trac] #9447(avfilter:closed): avfilter/vf_v360 interprets commands as relative rotation offsets

FFmpeg trac at avcodec.org
Wed Oct 20 21:49:20 EEST 2021

#9447: avfilter/vf_v360 interprets commands as relative rotation offsets
             Reporter:  Saul Baker  |                    Owner:  (none)
                 Type:  defect      |                   Status:  closed
             Priority:  normal      |                Component:  avfilter
              Version:  git-master  |               Resolution:  invalid
             Keywords:  v360        |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
Comment (by Saul Baker):

 That seems pretty definitive, what was your reasoning?

 It seems like zeroing these when {{{reset_rot!=0}}} is an unintended hold-
 over from the relative mode which makes sense there as you need to know
 the change increment not the cumulative value, but here they're better
 left untouched as long as {{{reset_rot!=0}}}.

 In fact it's a surprising side effect when {{{reset_rot>0}}} and any other
 of the properties except yaw, pitch and roll are changed the view is
 suddenly clamped back to 0,0,0 - skipping the zeroing of those properties
 in the siutation where {{{reset_rot!=0}}} would seem to make this
 reset_rot 'mode' would seem the best solution - and as a side effect make
 it fully consistent with the old absolute behaviour.
Ticket URL: <https://trac.ffmpeg.org/ticket/9447#comment:29>
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