[FFmpeg-user] Streaming flv with ffserver

Luke l1 at newanswertech.com
Tue Jun 24 11:51:51 CEST 2014

I've been having so much trouble streaming ASF to windows (or streaming anything 
else, really), I thought I would try FLV, using the example at:


My camera is not seeming to support H264 natively (actually it does, it's my old 
version of video4linux2 that doesn't recognize it), so I'm having to use mjpeg, 
which may or may not be my problem.

ffmpeg -f oss -i /dev/dsp2 -f v4l2 -vcodec mjpeg -i /dev/video0 -f ffm 

I will say, before I give the output, that I think the problem is that my 
compiled version of ffmpeg, did not come with many preset files, and did not 
come with any "medium" or libx264_medium preset.
So unless it's internal to the library (which may not be a thing), I don't have 
it on either machine, and that is probably the issue.

  ffmpeg version 2.2.git 
Copyright (c) 2000-2014 the FFmpeg developers
   built on Jun 12 2014 02:47:30 with gcc 4.4.7 (Debian 4.4.7-2)
   configuration: --prefix=/usr/local/ffmpeg_build 
--extra-ldflags=-L/usr/local/ffmpeg_build/lib --bindir=/usr/local/bin 
--extra-libs=-ldl --enable-gpl --enable-libass --enable-libfdk-aac 
--enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora 
--enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree
   libavutil      52. 89.100 / 52. 89.100
   libavcodec     55. 66.100 / 55. 66.100
   libavformat    55. 43.100 / 55. 43.100
   libavdevice    55. 13.101 / 55. 13.101
   libavfilter     4.  7.100 /  4.  7.100
   libswscale      2.  6.100 /  2.  6.100
   libswresample   0. 19.100 /  0. 19.100
   libpostproc    52.  3.100 / 52.  3.100
Guessed Channel Layout for  Input Stream #0.0 : stereo
Input #0, oss, from '/dev/dsp2':
   Duration: N/A, start: 1403602168.115474, bitrate: 1536 kb/s
     Stream #0:0: Audio: pcm_s16le, 48000 Hz, 2 channels, s16, 1536 kb/s
Input #1, video4linux2,v4l2, from '/dev/video0':
   Duration: N/A, start: 1403602168.385406, bitrate: N/A
     Stream #1:0: Video: mjpeg, yuvj422p(pc), 640x480, -5 kb/s, 30 fps, 30 tbr, 
1000k tbn, 1000k tbc
[swscaler @ 0xa02a300] deprecated pixel format used, make sure you did set range 
No pixel format specified, yuvj422p for H.264 encoding chosen.
Use -pix_fmt yuv420p for compatibility with outdated media players.
[libx264 @ 0xa002880] broken ffmpeg default settings detected
[libx264 @ 0xa002880] use an encoding preset (e.g. -vpre medium)
[libx264 @ 0xa002880] preset usage: -vpre <speed> -vpre <profile>
[libx264 @ 0xa002880] speed presets are listed in x264 --help
[libx264 @ 0xa002880] profile is optional; x264 defaults to high
Output #0, ffm, to 'http://video..com:5430/g.ffm':
     creation_time   : now
     Stream #0:0: Audio: aac (libfdk_aac), 44100 Hz, stereo, s16, 128 kb/s
       encoder         : Lavc55.66.100 libfdk_aac
     Stream #0:1: Video: h264, 320x240, q=2-31, 512 kb/s, 30 fps, 1000k tbn, 30 
       encoder         : Lavc55.66.100 libx264
Stream mapping:
   Stream #0:0 -> #0:0 (pcm_s16le (native) -> aac (libfdk_aac))
   Stream #1:0 -> #0:1 (mjpeg (native) -> h264 (libx264))
Error while opening encoder for output stream #0:1 - maybe incorrect parameters 
such as bit_rate, rate, width or height

ffserver config:

Port 5430
MaxHTTPConnections 50
MaxClients 45
MaxBandwidth 2000000
CustomLog /var/log/ffserver.log
<Feed g.ffm>
File /home/vidstream/.g.ffm
FileMaxSize 100MB
<Stream g.flv>
feed g.ffm
Format flv
VideoCodec libx264
VideoFrameRate 30
VideoBitRate 512
AVOptionVideo crf 23
         AVOptionVideo preset medium
         AVOptionVideo flags +global_header
VideoSize 320x240
AudioCodec aac
Strict -2
AudioBitRate 128
AudioChannels 2
AudioSampleRate 44100
AVOptionAudio flags +global_header
PreRoll 15

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