[FFmpeg-trac] #1845(avformat:closed): Encoded movies with mov_text subtitles do not play with QT Player

[FFmpeg]

#1845: Encoded movies with mov_text subtitles do not play with QT Player
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             Reporter:  Atarikid      |                    Owner:
                 Type:  defect        |                   Status:  closed
             Priority:  normal        |                Component:  avformat
              Version:  git-master    |               Resolution:  fixed
             Keywords:  mov mov_text  |               Blocked By:
             Blocking:                |  Reproduced by developer:  1
Analyzed by developer:  0             |
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Changes (by aviram):

 * status:  reopened => closed
 * resolution:   => fixed


Comment:

 This is the solution and it works on my macOS and iOS devices, but this is
 the first place where is documented:


 {{{
 ffmpeg -i video.mov -canvas_size 1920x1080 -i sub.srt -c copy -c:s
 mov_text -tag:s:s:0 tx3g new.mov
 }}}

 The {{{-tag:s:s:0 tx3g}}} does the trick. The {{{-canvas_size WxH}}}
 doesn't seem necessary but that is what make files look similar, in the
 metadata level, to what gpac MP4Box generates.

 Also, resulting file must be named {{{.mov}}}, not {{{.mp4}}} and not
 {{{.m4v}}}, otherwise a different file brand will be set which makes
 ffmpeg complain.

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Ticket URL: <https://trac.ffmpeg.org/ticket/1845#comment:33>
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