[FFmpeg-trac] #3142(FFserver:open): FFserver ignores encoding params in stream context

FFmpeg trac at avcodec.org
Thu Nov 28 10:45:44 CET 2013

#3142: FFserver ignores encoding params in stream context
             Reporter:  importinis   |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  important    |                Component:  FFserver
              Version:  unspecified  |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  1
Analyzed by developer:  1            |

Comment (by saste):

 Replying to [comment:3 importinis]:
 > In http://ffmpeg.org/ffserver.html#toc-Description  I see, that
 "ffserver is a streaming server for both audio and video. It supports
 several live feeds, streaming from files and time shifting on live feeds
 (you can seek to positions in the past on each live feed, provided you
 specify a big enough feed storage in ‘ffserver.conf’)."
 > So ffserver is streaming server not encoder, so why to ignore servers
 params? In this case, params related to streaming server(ffserver) should
 NOT be ignored. Maybe you have an answer: How to set Preroll,
 StartSendOnKey in -override_ffserver ? I cant find any option.

 AFAIK {{{Preroll}}} and {{{StartSendOnKey}}} should be settable even with

 {{{-override_ffserver}}} only affects encoding parameters (which are
 usually set by ffserver when sending the header to ffmpeg). So for example
 AVOptionAudio/Video options will be ignored by ffmpeg when you set the
 option, and you will need to specify the corresponding option in ffmpeg.

 Now, simple question since I started to look at ffserver yesterday, how
 can I reproduce the !Preroll/StartSendOnKey issue? What should I expect,
 what happens instead?

Ticket URL: <https://trac.ffmpeg.org/ticket/3142#comment:4>
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