[FFmpeg-trac] #7242(avfilter:new): zoompan filter variables 'in' and 'on' start at 2, 1 instead of at 0

FFmpeg trac at avcodec.org
Sun Jun 3 10:48:26 EEST 2018


#7242: zoompan filter variables 'in' and 'on' start at 2, 1 instead of at 0
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             Reporter:  jdlh        |                    Owner:
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  avfilter
              Version:  git-master  |               Resolution:
             Keywords:  zoompan     |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
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Comment (by jdlh):

 This behaviour was discussed on ffmpeg-user list thread
 ''[http://ffmpeg.org/pipermail/ffmpeg-user/2018-June/040023.html Zoompan
 filter, frame counts seem to start from 2 and 1, not 0 -- expected
 behaviour?]''

 Gyan Doshi's comment: "This change occurred when zoompan switched to
 activate in
 2ce43274e39295e3965c51dcfaf802628a5929f9". I think that means
 [http://git.videolan.org/?p=ffmpeg.git;a=blobdiff;f=libavfilter/vf_zoompan.c;h=6998441419dd25581cef384095af6dc80fa7e6aa;hp=53a0700e37a958d849ffbf503c28ddd9f663be3c;hb=2ce43274e39295e3965c51dcfaf802628a5929f9;hpb=99b6e68441ce49838ee424d2c3b659c92c01b368
 this diff of libavformat/vf_zoompan.c].

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Ticket URL: <https://trac.ffmpeg.org/ticket/7242#comment:1>
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