[FFmpeg-user] libdc1394 troubles

[Bryan Goldstein]

I finally resolved the issue. I wasn't setting the framerate right in two
ways:

1) The 7500 should have been 7.5 .
2) The '-r' flag must go *before* the input device if it is to be applied
to the input.

So in case anyone else wants to figure those things out without looking
stupid they can!

Your welcome,
Bryan


On Mon, Dec 3, 2012 at 1:44 PM, Bryan Goldstein <brysgo at gmail.com> wrote:

> Okay, it worked when I manually set the fps inside of <libavdevice/libdc1394.c>
> to the right framerate object. What I don't get is why it didn't just work
> to use `-r 7500`, anyone know what I'm doing wrong?
>
> Thanks,
> Bryan
>
>
> On Mon, Dec 3, 2012 at 12:33 PM, Bryan Goldstein <brysgo at gmail.com> wrote:
>
>> 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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>>>>
>>>
>>>
>>
>