[FFmpeg-user] Newbie streaming problem

[belcampo]

On 10/11/2011 12:15 PM, Steven Occhipinti wrote:
> On Tue, Oct 11, 2011 at 6:43 PM, belcampo<belcampo at zonnet.nl>  wrote:
>> 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
>>>
>>>
>>> _______________________________________________
>>> ffmpeg-user mailing list
>>> ffmpeg-user at ffmpeg.org
>>> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>> _______________________________________________
>> ffmpeg-user mailing list
>> ffmpeg-user at ffmpeg.org
>> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>>
>
>
> Thanks for your prompt reply.
> Your reply makes sense to me, but when I add those 2 map options, I
> get this error:
> "Number of stream maps must match number of output streams"
I think the order of options is important, try to change in something like:

ffmpeg -i /dev/video0 -vcodec mpeg4 -map 0.3 -map 0.2 -vtag DIVX -f video4linux2 -s 320x240 -r 15
http://localhost:8090/feed1.ffm

>
> I tried just the video stream too, but that gives the same result..
> what are the output streams?
>
> # ffmpeg -map 0.3 -map 0.2 -an -f video4linux2 -s 320x240  -r 15 -i
> /dev/video0 -vcodec mpeg4 -vtag DIVX http://localhost:8090/feed1.ffm
You choose 0.3 and 0.2 as input and therefore output,and then disable 
audio with -an that won't work.
> 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 @ 0x9ce02c0][3]Capabilities: 4000001
> [video4linux2 @ 0x9ce02c0]The V4L2 driver changed the video from
> 320x240 to 176x144
> Input #0, video4linux2, from '/dev/video0':
>    Duration: N/A, start: 1318328002.348537, bitrate: 6082 kb/s
>      Stream #0.0: Video: rawvideo, yuyv422, 176x144, 6082 kb/s, 15 tbr,
> 1000k tbn, 15 tbc
> Number of stream maps must match number of output streams
> ioctl(VIDIOC_QBUF)
> _______________________________________________
> ffmpeg-user mailing list
> ffmpeg-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/ffmpeg-user