[FFmpeg-user] Newbie streaming problem

[belcampo]

On 10/11/2011 04:26 AM, Steven Occhipinti wrote:
> Hi,
>
> I'm pretty new to ffmpeg and am a little confused on how ffserver works.
> My goal is to stream a webcam from one machine to (one or more) others.
> Ideally I would want the client machine to only require a web browser
> and the basic plugins, etc. to view the stream.
>
> I have Ubuntu 10.04.3 server installed and ffmpeg/ffserver from the repo.
> If I run this command to test the webcam and it starts up and a video
> file is successfully recorded /tmp/test.mp4:
>    #>  ffmpeg -an -f video4linux2 -s 320x240  -r 15 -i /dev/video0
> -vcodec mpeg4 -vtag DIVX /tmp/test.mp4
> I copied /etc/ffserver.conf to my home dir - I think I need to tweak
> this file a bit, but need a little help.
> I ran this command and it started a server on localhost:8090
>    #>  ffserver -f ~/ffserver.conf
> I then ran
>    #>  ffmpeg -an -f video4linux2 -s 320x240  -r 15 -i /dev/video0
> -vcodec mpeg4 -vtag DIVX http://localhost:8090/feed1.ffm
>
> and this is the output I get:
>
>    #>  ffmpeg -an -f video4linux2 -s 320x240  -r 15 -i /dev/video0
> -vcodec mpeg4 -vtag DIVX http://localhost:8090/feed1.ffm
> FFmpeg version SVN-r0.5.1-4:0.5.1-1ubuntu1.2, Copyright (c) 2000-2009
> Fabrice Bellard, et al.
>    configuration: --extra-version=4:0.5.1-1ubuntu1.2 --prefix=/usr
> --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib
> --enable-libgsm --enable-libschroedinger --enable-libspeex
> --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib
> --disable-stripping --disable-vhook --enable-runtime-cpudetect
> --enable-gpl --enable-postproc --enable-swscale --enable-x11grab
> --enable-libdc1394 --enable-shared --disable-static
>    libavutil     49.15. 0 / 49.15. 0
>    libavcodec    52.20. 1 / 52.20. 1
>    libavformat   52.31. 0 / 52.31. 0
>    libavdevice   52. 1. 0 / 52. 1. 0
>    libavfilter    0. 4. 0 /  0. 4. 0
>    libswscale     0. 7. 1 /  0. 7. 1
>    libpostproc   51. 2. 0 / 51. 2. 0
>    built on Sep 16 2011 17:04:18, gcc: 4.4.3
> [video4linux2 @ 0x89092c0][3]Capabilities: 4000001
> [video4linux2 @ 0x89092c0]The V4L2 driver changed the video from
> 320x240 to 176x144
> Input #0, video4linux2, from '/dev/video0':
>    Duration: N/A, start: 1318298315.446232, bitrate: 6082 kb/s
>      Stream #0.0: Video: rawvideo, yuyv422, 176x144, 6082 kb/s, 15 tbr,
> 1000k tbn, 15 tbc
> Output #0, ffm, to 'http://localhost:8090/feed1.ffm':
>      Stream #0.0: Audio: mp2, 44100 Hz, mono, s16, 32 kb/s
>      Stream #0.1: Video: mpeg1video, yuv420p, 176x144, q=3-31, 64 kb/s,
> 1000k tbn, 3 tbc
>      Stream #0.2: Audio: mp2, 22050 Hz, mono, s16, 64 kb/s
>      Stream #0.3: Video: msmpeg4, yuv420p, 352x240, q=3-31, 256 kb/s,
> 1000k tbn, 15 tbc
> Could not find input stream matching output stream #0.0
> ioctl(VIDIOC_QBUF)
>
>
> I'm assuming I need to setup a more suitable<feed>  definition to
> match the input, but after some fiddling I can't seem to get it
> working.
Your camera is providing 2 video and 2 audio streams you need to use the 
map function to make it work.
Adding -map 0.3 -map 0.2 to your ffmpeg command line will choose the 
higher definition video and audio.
> I've attached my ffserver.conf - Any help is much appreciated.
>
>
> Cheers,
> Steve
>
>
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