[Libav-user] avformat_find_stream_info times out on rtp stream

[Philippe Gorley]

> 2016-09-16 18:16 GMT+02:00 Philippe Gorley
> <philippe.gorley at savoirfairelinux.com>:
> > I'm looking to upgrade my application (I'm currently using FFmpeg from the Ubuntu 16.04 repo)
> > to a more recent release of FFmpeg, such as 3.1.3. Everything went well, except that
> > avformat_find_stream_info now times out on my RTP stream, although it does eventually
> > return the info. I've tried linking against master with the same result. Doing some
> > investigation, I found that release 2.8.6 does not exhibit this behaviour, while 2.8.7 does.
> 
> (Which change introduced the issue but see below first?)
> 
> [...]
> 
> > I've compiled FFmpeg with the following configuration:
> > ./configure --prefix=/usr/local --disable-everything --disable-programs --enable-protocols
> > --enable-demuxers --enable-parser=h264 --enable-decoder=h264 --enable-indev=v4l2
> > --enable-shared
> >
> > Is this timeout a known bug?
> 
> Is the issue reproducible with current FFmpeg git head?
> I believe a similar issue was fixed recently.

Yes, I have reproduced with git head (as of 30 or 45 minutes ago).

> Is it also reproducible with "./ffmpeg -i rtp://hostname:port"?
> Is it also reproducible if you build with "./configure && make"?

It does not time out. Any ideas why that is? Is it maybe an option in the AVDictionary?

As for which change introduced it, I don't know; I downloaded and compiled the release tarballs from http://ffmpeg.org/releases/

> Carl Eugen
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Philippe