[FFmpeg-trac] #4117(undetermined:new): ffmpeg hangs while converting usb camera input

[FFmpeg]

#4117: ffmpeg hangs while converting usb camera input
-------------------------------------+-------------------------------------
             Reporter:  biofool      |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  unspecified  |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
-------------------------------------+-------------------------------------
Changes (by cehoyos):

 * keywords:  ffmpeg hang =>
 * priority:  important => normal
 * component:  ffmpeg => undetermined


Old description:

> Summary of the bug:
> How to reproduce:
> {{{
>  ffmpeg -f lavfi -i aevalsrc=0 -f video4linux2 -s 640x480 -i /dev/video0
> -strict -2 http://localhost:8090/feed1.ffm
> ffmpeg version N-67694-gdcb10ef Copyright (c) 2000-2014 the FFmpeg
> developers
>   built on Nov 15 2014 13:25:02 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
>   configuration: --enable-libvpx --enable-libvorbis\}}}
> Patches should be submitted to the ffmpeg-devel mailing list and not this
> bug tracker.
> {{{
> ffserver.conf:
> HTTPPort 8090                      # Port to bind the server to
> HTTPBindAddress 0.0.0.0
> MaxHTTPConnections 2000
> MaxClients 1000
> MaxBandwidth 10000             # Maximum bandwidth per client
>                                # set this high enough to exceed stream
> bitrate
> CustomLog -
>
> <Feed feed1.ffm>               # This is the input feed where FFmpeg will
> send
>    File ./feed1.ffm            # video stream.
>    FileMaxSize 10G              # Maximum file size for buffering video
>    ACL allow 127.0.0.1
> </Feed>
>
> <Stream test.webm>              # Output stream URL definition
>    Feed feed1.ffm
> #   Format ogg
>    Format webm
>
> #   # Audio settings
>    AudioCodec vorbis
>    AudioBitRate 64             # Audio bitrate
>
>    # Video settings
>    VideoCodec libvpx
> #   VideoCodec  vp8
>    VideoSize 800x448
>    VideoFrameRate 30
>    AVOptionVideo flags +global_header  # Parameters passed to encoder
> #   AVOptionVideo quality rt
>
>                                        # (same as ffmpeg command-line
> parameters)
> #   AVOptionVideo cpu-used 0
>    AVOptionVideo qmin 10
>    AVOptionVideo qmax 42
>    AVOptionAudio flags +global_header
>
>    PreRoll 15
>    StartSendOnKey
>    VideoBitRate 400            # Video bitrate
> </Stream>
>
> <Stream status.html>            # Server status URL
>    Format status
>    # Only allow local people to get the status
>    ACL allow localhost
>    ACL allow 192.168.0.0 192.168.255.255
> </Stream>
>
> <Redirect index.html>    # Just an URL redirect for index
>    # Redirect index.html to the appropriate site
>    URL http://www.ffmpeg.org/
> </Redirect>
> }}}

New description:

 Summary of the bug:
 How to reproduce:
 {{{
  ffmpeg -f lavfi -i aevalsrc=0 -f video4linux2 -s 640x480 -i /dev/video0
 -strict -2 http://localhost:8090/feed1.ffm
 ffmpeg version N-67694-gdcb10ef Copyright (c) 2000-2014 the FFmpeg
 developers
   built on Nov 15 2014 13:25:02 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
   configuration: --enable-libvpx --enable-libvorbis\
 }}}
 {{{
 ffserver.conf:
 HTTPPort 8090                      # Port to bind the server to
 HTTPBindAddress 0.0.0.0
 MaxHTTPConnections 2000
 MaxClients 1000
 MaxBandwidth 10000             # Maximum bandwidth per client
                                # set this high enough to exceed stream
 bitrate
 CustomLog -

 <Feed feed1.ffm>               # This is the input feed where FFmpeg will
 send
    File ./feed1.ffm            # video stream.
    FileMaxSize 10G              # Maximum file size for buffering video
    ACL allow 127.0.0.1
 </Feed>

 <Stream test.webm>              # Output stream URL definition
    Feed feed1.ffm
 #   Format ogg
    Format webm

 #   # Audio settings
    AudioCodec vorbis
    AudioBitRate 64             # Audio bitrate

    # Video settings
    VideoCodec libvpx
 #   VideoCodec  vp8
    VideoSize 800x448
    VideoFrameRate 30
    AVOptionVideo flags +global_header  # Parameters passed to encoder
 #   AVOptionVideo quality rt

                                        # (same as ffmpeg command-line
 parameters)
 #   AVOptionVideo cpu-used 0
    AVOptionVideo qmin 10
    AVOptionVideo qmax 42
    AVOptionAudio flags +global_header

    PreRoll 15
    StartSendOnKey
    VideoBitRate 400            # Video bitrate
 </Stream>

 <Stream status.html>            # Server status URL
    Format status
    # Only allow local people to get the status
    ACL allow localhost
    ACL allow 192.168.0.0 192.168.255.255
 </Stream>

 <Redirect index.html>    # Just an URL redirect for index
    # Redirect index.html to the appropriate site
    URL http://www.ffmpeg.org/
 </Redirect>
 }}}

--

Comment:

 Is the issue only reproducible if you use multiple inputs or also with one
 input?
 Is the issue only reproducible with ffm output?

 Please provide the failing command line (that hangs) together with the
 complete, uncut console output and a backtrace when hanging to make this a
 valid ticket.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/4117#comment:1>
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