[FFmpeg-devel] Notes about avdevice

[compn]

On Sun, 25 Nov 2012 07:20:00 -0500, Don Moir wrote:
>> On Sun, Nov 25, 2012 at 03:38:20AM -0500, Don Moir wrote:
>>> >Don Moir <donmoir <at> comcast.net> writes:
>>> >
>>> >>1) avdevice has dependencies on avfilter and swresample.
>>> >>I have no need for either of these and this is
>>> >>unfortunate. It doesn't appear that these dependencies
>>> >>can be turned off.
>>> >
>>> >Unreproducible.
>>> >
>>> >Carl Eugen
>>>
>>> If I try to use avdevice without avfilter-3.dll and swresample-0.dll
>>> in place it complains. This is possibly due to lavfi.c in avdevice.
>>
>> The swresample dependency is because you have e.g. scale filter enabled
>> in avfilter.
>> The avfilter dependency is because you have the avfilter indev
>> activated.
>
>How do you build avdevice with no dependency on avfilter ?
>
>> Also the device lists do _not_ go to stdout, they go to av_log.
>> While hardly convenient, intercepting them certainly is feasible.
>
>Yes correct and basically means the same thing to me and not useable. You never know what will come thru av_log and in my case I 
>might have several videos playing along with camera support. Cameras get plugged in and unplugged and would need to update list 
>periodically. I am not going to do something like try to read the av_log just so I can use avdevice. But getting the list in a 
>modern way is easy along with the device resolutions and should be implemented in a modern way instead of something that goes back 
>30 years. 
>

do you want json output like ffmpeg has now?

-compn