[FFmpeg-user] libdc1394 troubles

[Bryan Goldstein]

If it helps, the error is being thrown in libavdevice/libdc1394.c when a
sanity check is reached and the fps->framerate appears to be zero (which
I'm guessing it shouldn't be).

- Bryan


On Sun, Dec 2, 2012 at 11:13 AM, Bryan Goldstein <brysgo at gmail.com> wrote:

> Hi Lou,
>
> Here it is uncut:
> ---
> omap3-multi:~$ sudo ffmpeg -loglevel debug -v verbose -f libdc1394 -i
> hw:0,0 -vcodec mpeg4 -b:v 10000k -bufsize 150000k -r 640x480
> http://127.0.0.1:8090/feed1.ffm
> Password:
> ffmpeg version N-47291-g0b14c19 Copyright (c) 2000-2012 the FFmpeg
> developers
>   built on Nov 30 2012 01:11:28 with gcc 4.5.3 (GCC) 20110311 (prerelease)
>   configuration: --enable-libdc1394
>   libavutil      52.  9.102 / 52.  9.102
>   libavcodec     54. 77.100 / 54. 77.100
>   libavformat    54. 40.100 / 54. 40.100
>   libavdevice    54.  3.100 / 54.  3.100
>   libavfilter     3. 23.104 /  3. 23.104
>   libswscale      2.  1.103 /  2.  1.103
>   libswresample   0. 17.101 /  0. 17.101
> [libdc1394 @ 0x1cdc520] Can't find matching camera format for uyvy422,
> 320x240 at 29970:1000fps
> hw:0,0: Operation not permitted
> ---
> However, I can still get the same output by just doing `ffmpeg -f
> libdc1394 -i hw:0,0`
>
> Thanks,
> Bryan
>
>
> On Fri, Nov 30, 2012 at 7:41 PM, Lou <lou at lrcd.com> wrote:
>
>> On Fri, 30 Nov 2012 16:03:31 -0500
>> Bryan Goldstein <brysgo at gmail.com> wrote:
>>
>> > Hello,
>> >
>> > I am new to ffmpeg and I am having some trouble using my libdc1394
>> > supported webcam with it. I keep getting the same error:
>> > ----
>> > [libdc1394 @ 0x1722520] Can't find matching camera format for uyvy422,
>> > 320x240 at 29970:1000fps
>> > hw:0,0: Operation not permitted
>> > ----
>> >
>> > Here is some build info:
>> >
>> > ffmpeg version N-47291-g0b14c19 Copyright (c) 2000-2012 the FFmpeg
>> > developers
>> >   built on Nov 30 2012 01:11:28 with gcc 4.5.3 (GCC) 20110311
>> (prerelease)
>> >   configuration: --enable-libdc1394
>> >   libavutil      52.  9.102 / 52.  9.102
>> >   libavcodec     54. 77.100 / 54. 77.100
>> >   libavformat    54. 40.100 / 54. 40.100
>> >   libavdevice    54.  3.100 / 54.  3.100
>> >   libavfilter     3. 23.104 /  3. 23.104
>> >   libswscale      2.  1.103 /  2.  1.103
>> >   libswresample   0. 17.101 /  0. 17.101
>> >
>> > libdc1394 version is 2.2.0
>> >
>> > Camera is Chameleon CMLN-13S2C
>> >
>> > Does anyone have any idea as to what I could be doing wrong?
>> >
>> > Thanks,
>> > Bryan
>>
>> Please provide the complete ffmpeg command line and the complete, uncut
>> console output.
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>
>