[FFmpeg-trac] #7472(avcodec:new): double free detected in avcodec_close after rtmp streaming with h264 codec

[FFmpeg]

#7472: double free detected in avcodec_close after rtmp streaming with h264 codec
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             Reporter:  andreanobile  |                    Owner:
                 Type:  defect        |                   Status:  new
             Priority:  important     |                Component:  avcodec
              Version:  unspecified   |               Resolution:
             Keywords:  double free   |               Blocked By:
             Blocking:                |  Reproduced by developer:  0
Analyzed by developer:  0             |
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Comment (by heleppkes):

 https://trac.ffmpeg.org/attachment/ticket/7472/main.cpp#L229

 This is the offending line. If you assign the same extradata buffer to
 both structures, it'll be free'ed twice.

 avcodec_parameters_from_context will already copy the extradata, I would
 recommend to move that line after opening the encoder, then there is no
 need to manually touch it, and nothing bad happens.

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Ticket URL: <https://trac.ffmpeg.org/ticket/7472#comment:1>
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