[FFmpeg-trac] #7623(avcodec:new): Wrong interpretation of (m)jpeg aspect ratio

FFmpeg trac at avcodec.org
Thu Dec 20 00:43:31 EET 2018

#7623: Wrong interpretation of (m)jpeg aspect ratio
             Reporter:  UlfZibis      |                    Owner:
                 Type:  defect        |                   Status:  new
             Priority:  normal        |                Component:  avcodec
              Version:  git-master    |               Resolution:
             Keywords:  mjpeg aspect  |               Blocked By:
             Blocking:                |  Reproduced by developer:  0
Analyzed by developer:  0             |

Comment (by llogan):

 Two issues:

 Your `ffmpeg` is old. Only recent builds from the git master branch are
 supported here due to the level of development that occurs.
 [https://johnvansickle.com/ffmpeg/ Download] a build or compile.

 You need to add `-frames:v 1` to output a single frame. Otherwise use a
 pattern, such as `output_%03d.jpg`, as specified in the error message.

Ticket URL: <https://trac.ffmpeg.org/ticket/7623#comment:5>
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