[FFmpeg-trac] #5825(avcodec:closed): Vobsub subtitles won't overlay with some MKV

FFmpeg trac at avcodec.org
Tue Sep 27 03:59:47 EEST 2016

#5825: Vobsub subtitles won't overlay with some MKV
             Reporter:  edumj        |                    Owner:
                 Type:  defect       |                   Status:  closed
             Priority:  important    |                Component:  avcodec
              Version:  git-master   |               Resolution:  fixed
             Keywords:  dvdsub       |               Blocked By:
  regression                         |  Reproduced by developer:  1
             Blocking:               |
Analyzed by developer:  0            |

Comment (by edumj):

 Ok, no error with full file!

 But the 1000 fps thing...

 I used this full command:
 "ffmpeg" -i "%~1" -lavfi
 [0:s:0][0:v]scale2ref[subs][video];[video][subs]overlay -map 0:a:1 -f avi
 -c:v libxvid -b:v 1500k -vtag XVID -c:a libmp3lame -b:a 128k
 "overlay+scale2ref -lavfi.avi"
 And the resulting video is 1000 fps and very "pixelated" (low bitrate),
 but if I add "-r 25" as output, it's Ok. Do I have to always especify
 framerate for lavfi to work?

Ticket URL: <https://trac.ffmpeg.org/ticket/5825#comment:26>
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