[FFmpeg-user] Newbie streaming problem
belcampo
belcampo at zonnet.nl
Wed Oct 12 18:03:38 CEST 2011
On 10/12/2011 02:07 PM, Steven Occhipinti wrote:
> Thanks, must be close now.
>
> I thought the -an would be a little contradicting, but I tried removing one
> of the -map options instead of removing the -an option. Either way,
> rearranging the options as you suggested helped, but I'm getting a different
> error now.
I'm no webcam/video4linux2 guru, so I'm guessing a little bit.
Earlier you stated that you could create a playable mp4 with the command
ffmpeg -an -f video4linux2 -s 320x240 -r 15 -i /dev/video0
-vcodec mpeg4 -vtag DIVX /tmp/test.mp4
Does the later used command also produce a playable file?
ffmpeg -i /dev/video0 -vcodec mpeg4 -map 0.3 -map 0.2 -vtag DIVX -f
video4linux2 -s 320x240 -r 15 /tmp/test.mp4
if not, maybe placing -f video4linux2
in front of -i makes a difference
So maybe try
ffmpeg -f video4linux2 -i /dev/video0 -vcodec mpeg4 -map 0.3 -map 0.2 -vtag DIVX
-s 320x240 -r 15 /tmp/test.mp4
>
> # 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
> 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
> /dev/video0: Unknown format
>
>
> Sorry to keep asking like this :(
> I wouldn't have thought it would compain about "-f video4linux2" as that was
> one of the options I thought I got right initially when I recorded my first
> video clip.
>
> Any ideas?
> I appreciate you help!
>
>
> On Wed, Oct 12, 2011 at 1:42 AM, belcampo<belcampo at zonnet.nl> wrote:
>
>> 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<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<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<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<http://ffmpeg.org/mailman/listinfo/ffmpeg-user>
>>>>>
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>>>> ffmpeg-user mailing list
>>>> ffmpeg-user at ffmpeg.org
>>>> http://ffmpeg.org/mailman/**listinfo/ffmpeg-user<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<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<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<http://ffmpeg.org/mailman/listinfo/ffmpeg-user>
>>>
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>> ffmpeg-user at ffmpeg.org
>> http://ffmpeg.org/mailman/**listinfo/ffmpeg-user<http://ffmpeg.org/mailman/listinfo/ffmpeg-user>
>>
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