title: Streaming by ffserver and ffmpeg on RaspberryPi
body: <p>I want to ditribute the video of the UVC Camera on Rpsberry Pi
  I edited /etc/ffserver.conf as follows.</p>
  
  <pre><code>HTTPPort 8090
  HTTPBindAddress 0.0.0.0
  MaxHTTPConnections 20
  MaxClients 10
  MaxBandwidth 500000
  CustomLog -
  
  &lt;Feed feed1.ffm&gt;
  File /tmp/feed1.ffm
  FileMaxSize 50M
  &lt;/Feed&gt;
  
  &lt;Stream index.html&gt;
  Format status
  ACL allow 192.168.12.0 192.168.12.255
  &lt;/Stream&gt;
  
  &lt;Stream test.mpeg&gt;
  Feed feed1.ffm
  Format mpeg
  VideoSize hd720
  VideoFrameRate 15
  VideoBitRate 4096
  VideoBufferSize 4096
  VideoQMin 5
  VideoQMax 51
  Strict -1
  &lt;/Stream&gt;
  </code></pre>
  
  <p>Then, I started ffserver
  Next, I executed the following command</p>
  
  <pre><code>ffmpeg -f v4l2 -s 1280x720 -i /dev/video0 -ac 1 -f alsa -i hw:1,0 http://localhost:8090/feed1.ffm
  </code></pre>
  
  <p>I requested 192.168.12.101: 8090 / test.mpeg from FireFox on the same network,
  but no video is displayed and a program to open or a file save dialog opens.</p>
  
  <p>What should I do?</p>
  
  <p>Execution result of Raspberry Pi</p>
  
  <pre><code>Input #0, video4linux2,v4l2, from '/dev/video0':
    Duration: N/A, start: 519134.790720, bitrate: 147456 kb/s
      Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 1280x720, 147456 kb/s, 10 fps, 10 tbr, 1000k tbn, 1000k tbc
  Guessed Channel Layout for Input Stream #1.0 : mono
  Input #1, alsa, from 'hw:1,0':
    Duration: N/A, start: 1536994777.250578, bitrate: 768 kb/s
      Stream #1:0: Audio: pcm_s16le, 48000 Hz, mono, s16, 768 kb/s
  [tcp @ 0x23ec7f0] Connection to tcp://localhost:8090 failed (Connection refused), trying next address
  Sat Sep 15 15:59:37 2018 [ffm @ 0xf10e40]Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
  Sat Sep 15 15:59:37 2018 [ffm @ 0xf10e40]Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
  Sat Sep 15 15:59:37 2018 127.0.0.1 - - [GET] "/feed1.ffm HTTP/1.1" 200 4175
  [tcp @ 0x2401d50] Connection to tcp://localhost:8090 failed (Connection refused), trying next address
  Output #0, ffm, to 'http://localhost:8090/feed1.ffm':
    Metadata:
      creation_time   : now
      encoder         : Lavf57.56.101
      Stream #0:0: Audio: mp2, 22050 Hz, mono, s16, 64 kb/s
      Metadata:
        encoder         : Lavc57.64.101 mp2
      Stream #0:1: Video: mpeg1video, yuv420p, 1280x720, q=5-51, 4096 kb/s, 10 fps, 1000k tbn, 15 tbc
      Metadata:
        encoder         : Lavc57.64.101 mpeg1video
      Side data:
        cpb: bitrate max/min/avg: 8192000/0/4096000 buffer size: 33554432 vbv_delay: -1
  Stream mapping:
    Stream #1:0 -&gt; #0:0 (pcm_s16le (native) -&gt; mp2 (native))
    Stream #0:0 -&gt; #0:1 (rawvideo (native) -&gt; mpeg1video (native))
  Press [q] to stop, [?] for help
  [alsa @ 0x23ebee0] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8)
  [alsa @ 0x23ebee0] ALSA buffer xrun. 48kB time=00:00:00.13 bitrate=2949.1kbits/s dup=3 drop=0 speed=0.251x
  [video4linux2,v4l2 @ 0x23ea230] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8)
  [alsa @ 0x23ebee0] ALSA buffer xrun.276kB time=00:00:02.40 bitrate= 942.1kbits/s dup=30 drop=0 speed=0.201x
  Sat Sep 15 15:59:55 2018 [mpeg @ 0xf136d0]VBV buffer size not set, using default size of 130KB speed=0.844x
  If you want the mpeg file to be compliant to some specification
  Like DVD, VCD or others, make sure you set the correct buffer size
  frame=  107 fps=3.1 q=2.0 Lsize=     856kB time=00:00:14.06 bitrate= 498.6kbits/s dup=80 drop=0 speed=0.413x
  video:844kB audio:2kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.120285%
  Sat Sep 15 16:00:11 2018 127.0.0.1 - - [POST] "/feed1.ffm HTTP/1.1" 200 876544
  Sat Sep 15 16:00:11 2018 [mpeg @ 0xf136d0]buffer underflow st=0 bufi=0 size=418
  Sat Sep 15 16:00:11 2018 192.168.12.150 - - [GET] "/test.mpeg HTTP/1.1" 200 29263
  Exiting normally, received signal 2.
  </code></pre>
  
  <p>Result of 192.168.12.101:8090</p>
  
  <pre><code>ffserver Status
  Available Streams
  Path    Served
  Conns   
  bytes   Format  Bit rate
  kbit/s  Video
  kbit/s  
  Codec   Audio
  kbit/s  
  Codec   Feed
  index.html  1   0   -   -   -       -   
  test.mpeg   0   0   mpeg    4160    4096    mpeg1video  64  mp2     feed1.ffm
  Feed feed1.ffm
  Stream  type    kbit/s  codec   Parameters
  0   audio   64  mp2 1 channel(s), 22050 Hz
  1   video   4096    mpeg1video  1280x720, q=5-51, fps=15
  Connection Status
  Number of connections: 1 / 10
  Bandwidth in use: 0k / 10000k
  #   File    IP  Proto   State   Target bit/s    Actual bit/s    Bytes transferred
  1   index.html  192.168.12.150  HTTP/1.1    HTTP_WAIT_REQUEST   0   0   0 
  </code></pre>