[FFmpeg-user] Newbie streaming problem
belcampo
belcampo at zonnet.nl
Thu Oct 13 16:28:18 CEST 2011
On 10/13/2011 02:35 PM, Steven Occhipinti wrote:
> On Thu, Oct 13, 2011 at 3:03 AM, belcampo<belcampo at zonnet.nl> wrote:
>
>> 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
>>
> This does not produce a playable file, I get this error:
> [video4linux2 @ 0x823a2c0]Wrong size (0x0)
> /dev/video0: Error while opening file
>
>
>> if not, maybe placing -f video4linux2
>> in front of -i makes a difference
>>
> I've found the -f video4linux2 must be before the -i /dev/video1, otherwise
> I get an "Unknown format" error.
> That also matches other examples I have found.
>
> I was also getting a "Wrong size (0x0)" error, and so I have moved all other
> arguments between the -f and the -i to fix that.
> After a fair amount of experimenting, this is the best I can come up with:
>
> # ffmpeg -f video4linux2 -s 320x240 -r 15 -vcodec mpeg4 -map 0.3 -map 0.2
> -vtag DIVX -i /dev/video0 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 @ 0x9b322d0][3]Capabilities: 4000001
> [video4linux2 @ 0x9b322d0]The V4L2 driver changed the video from 320x240 to
> 176x144
> Input #0, video4linux2, from '/dev/video0':
> Duration: N/A, start: 1318508978.203480, bitrate: 6082 kb/s
> Stream #0.0: Video: mpeg4, yuyv422, 176x144, 6082 kb/s, 15 tbr, 1000k
> tbn, 15 tbc
> Number of stream maps must match number of output streams
> ioctl(VIDIOC_QBUF)
>
>
> I also experimented with different -map options, but no luck.
> Is there a way I can ensure which streams need to set with -map.
> The man page says it maps input streams to output streams, but it looks like
> there is only 1 input stream and 4 output streams.
The term stream confuses I think, you have 1 webcam which can produce 2
video streams, and 2 audio streams, where the difference is the
quaility. Video resolution of 320x240 or 176x144 and audio bitrate of
32kb/s or 64kb/s.
Maybe, again I'm no webcam guru, you should have a look at the program
v4l2-ctl to set the webcam in one of the different quality modes. After
'setting' this you only will have one video and one audio stream, which
perhaps makes the map function obsolete. Give it a try, maybe it'll
solve all or a few of the problems.
>
> Man page:
> -map input_stream_id[:sync_stream_id]
> Set stream mapping from input streams to output streams. Just
> enumerate
> the input streams in the order you want them in the output.
> sync_stream_id
> if specified sets the input stream to sync against.
>
> It looks like it take input streams as argument, which I think I only have 1
> of.
> When I run it without the -map options, it lists 1 input stream and 4 output
> streams:
> # ffmpeg -f video4linux2 -s 320x240 -r 15 -vcodec mpeg4 -vtag DIVX -i
> /dev/video0 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 @ 0x812c2d0][3]Capabilities: 4000001
> [video4linux2 @ 0x812c2d0]The V4L2 driver changed the video from 320x240 to
> 176x144
> Input #0, video4linux2, from '/dev/video0':
> Duration: N/A, start: 1318509208.059178, bitrate: 6082 kb/s
> Stream #0.0: Video: mpeg4, 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: mpeg4, 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)
>
> These "streams" still confuse me :S
>
>
>> 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<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>
>>>>>>> <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>
>>>>>>> <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>
>>>>>>> <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>
>>>>>>> <http://**ffmpeg.org/mailman/listinfo/**ffmpeg-user<http://ffmpeg.org/mailman/listinfo/ffmpeg-user>
>>>>>>> ______________________________****_________________
>>>>>> ffmpeg-user mailing list
>>>>>> ffmpeg-user at ffmpeg.org
>>>>>> http://ffmpeg.org/mailman/****listinfo/ffmpeg-user<http://ffmpeg.org/mailman/**listinfo/ffmpeg-user>
>>>>>> <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><
>>>> 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><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>
>>>>> <http://**ffmpeg.org/mailman/listinfo/**ffmpeg-user<http://ffmpeg.org/mailman/listinfo/ffmpeg-user>
>>>>> ______________________________****_________________
>>>> ffmpeg-user mailing list
>>>> ffmpeg-user at ffmpeg.org
>>>> http://ffmpeg.org/mailman/****listinfo/ffmpeg-user<http://ffmpeg.org/mailman/**listinfo/ffmpeg-user>
>>>> <http://**ffmpeg.org/mailman/listinfo/**ffmpeg-user<http://ffmpeg.org/mailman/listinfo/ffmpeg-user>
>>>> ______________________________**_________________
>>> 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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