[FFmpeg-user] How to record audio and video from FaceTime HD Camera in OSX

[Jay Muthialu]

Hi Moritz,

Thanks for the information. I finally applied the patches. Although I could not apply through git because the latest ffmpeg version I downloaded did not seem to match with the patches in the email and it failed. So I had to manually sync the patch file to the source file and I complied sucessfully. The patched version works for all basics scenarios  but did not fix the underlying issue. It now shows the inbuilt microphone which is an improvement, but the microphone is showing as error. 

$ ffmpeg -f avfoundation -list_devices true -i ""

Output:
libavutil      54.  7.100 / 54.  7.100
  libavcodec     56.  1.100 / 56.  1.100
  libavformat    56.  4.102 / 56.  4.102
  libavdevice    56.  0.100 / 56.  0.100
  libavfilter     5.  1.101 /  5.  1.101
  libavresample   2.  1.  0 /  2.  1.  0
  libswscale      3.  0.100 /  3.  0.100
  libswresample   1.  1.100 /  1.  1.100
  libpostproc    53.  0.100 / 53.  0.100
[AVFoundation input device @ 0x7ff6c0c14de0] AVFoundation video devices:
[AVFoundation input device @ 0x7ff6c0c14de0] [0] FaceTime HD Camera
[AVFoundation input device @ 0x7ff6c0c14de0] AVFoundation audio devices:
[AVFoundation input device @ 0x7ff6c0c14de0] [0] Built-in Microphone
: Input/output error

Can you or anyone help me on this? Please note that I have applied all the 5 patches in the thread given below.

https://lists.ffmpeg.org/pipermail/ffmpeg-devel/2014-April/156866.html

These patches only modified one file "avfoundation.m". I have attached the patched avfoundation.m for reference purpose.

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Warm Regards
Jay

On Sep 8, 2014, at 3:52 AM, Moritz Barsnick <barsnick at gmx.net> wrote:

> Hi Jay,
> [oops, sent too early]
> 
> On Sun, Sep 07, 2014 at 12:01:25 -0400, Jay Muthialu wrote:
> 
>> I went through all the patches specified in the link but I am not
>> sure how to apply the patches. Could you please guide me on how to
>> apply the patches and also what would be command I would have to use
>> to take audio input ? Please note that I originally installed ffmpeg
>> using Homebrew.
> 
> You would need to compile yourself. Instructions are here:
> 
> https://trac.ffmpeg.org/wiki/CompilationGuide/MacOSX
> 
> I don't know how Homebrew works. To apply the patches, you would need
> to grab the patch files from the emails, i.e. sections like this:
> 
> diff --git a/libavdevice/avfoundation.m b/libavdevice/avfoundation.m
> index 3622be0..2ac1b3c 100644
> --- a/libavdevice/avfoundation.m
> +++ b/libavdevice/avfoundation.m
> <at>  <at>  -191,7 +191,7  <at>  <at>  static int
> avf_read_header(AVFormatContext *s)
>             goto fail;
>         }
>     } else {
> -        video_device = [AVCaptureDevice
> - defaultDeviceWithMediaType:AVMediaTypeMuxed];
> +        video_device = [AVCaptureDevice
> - defaultDeviceWithMediaType:AVMediaTypeVideo];
>     }
> 
>     // Video capture device not found, looking for AVMediaTypeVideo
> -- 
> 1.8.3.2
> 
> (I don't know where to get the proper ASCII versions of these patches)
> and apply each of them with
> patch -p1 -i <patchfilename>
> 
> before the configure of make stage. As said, I have no idea how to
> interrupt homebrew stages.
> 
> Moritz
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