[FFmpeg-trac] #5041(undetermined:closed): ffmpeg hangs up during analyzing flv stream

[FFmpeg]

#5041: ffmpeg hangs up during analyzing flv stream
-------------------------------------+-------------------------------------
             Reporter:  maxvgi       |                    Owner:
                 Type:  defect       |                   Status:  closed
             Priority:  normal       |                Component:
              Version:  git-master   |  undetermined
             Keywords:  http flv     |               Resolution:
             Blocking:               |  worksforme
Analyzed by developer:  0            |               Blocked By:
                                     |  Reproduced by developer:  0
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Comment (by maxvgi):

 Replying to [comment:6 cehoyos]:
 > {{{
 > $ ffmpeg -i http://admin:123890@91.202.204.9:89/h264.flv -probesize 1000
 -analyzeduration 1 -vcodec copy 1.mp4
 > }}}

 Yes, I got that it works if you ommit option {{{-an}}}.

 But I have several dozens of different multimedia sources. Some of them
 have audio stream inside, others do not.

 Is there any possibility to save just VIDEO stream from each of them using
 the same command line for them all, or it is nessessary to check several
 argument sets for ffmpeg each time multimedia source is created?

 In the {{{ffmpeg N-73635-gfd4c87f}}} I used the following command line:
 {{{
 $ ffmpeg -i <URI> -vcodec copy -an 1.mp4
 }}}
 And all video streams were muxed to mp4, audio streams were ignored.

 Then I tried to update ffmpeg to {{{N-76851-ga330430}}}. Everything works
 fine, but the only one stream
 {{{http://admin:123890@91.202.204.9:89/h264.flv}}} hangs up if the option
 {{{-an}}} is present in command line.

 As you understand, I cannot ommit the option {{{-an}}} from this command
 line because I need to save only video from all other sources.
 (Furthermore, I cannot save some audio codecs to mp4 and have not enough
 CPU to transcode). Yes, it is possible to make several attempts to
 download each stream using with different command lines, but it is rather
 difficult to realize.

 Is that a bug or feature? And the behaviour of which version of ffmpeg is
 correct?
 Should I continue using old {{{N-73635-gfd4c87f}}} or ask you to fix the
 problem in the current version?

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Ticket URL: <https://trac.ffmpeg.org/ticket/5041#comment:7>
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