[FFmpeg-user] How to capture video and audio from MacBook's camera/microphone?

[Kuu Miyazaki]

BTW, no problem with Vobis.
It seems like Opus encoding issue.

# OK (VP8 + Vorbis)
$ ffmpeg -f avfoundation -video_size 320x240 -framerate 30
-pixel_format bgr0  -i "0:0" -c:v  libvpx -c:a libvorbis
vp8-vorbis.webm

# NG (VP9 + Opus)
$ ffmpeg -f avfoundation -video_size 320x240 -framerate 30
-pixel_format bgr0  -i "0:0" -c:v  libvpx-vp9 -c:a libopus
vp9-opus.webm

2015-10-11 21:24 GMT+09:00 Kuu Miyazaki <miyazaqui at gmail.com>:
>>My internal MIC works fine here - please report back if you don't get it
>>working.
>
> I'm still unable to hear the sound.
> I tried with a different Macbook Pro (OSX 10.11 El Capitan.)
> But the result was the same, no sound.
> Below is the output:
>
> $ ffmpeg -f avfoundation -video_size 320x240 -pixel_format bgr0 -i
> "0:0" video-audio.webm
>
> ffmpeg version 2.8 Copyright (c) 2000-2015 the FFmpeg developers
>   built with Apple LLVM version 7.0.0 (clang-700.0.72)
>   configuration: --prefix=/usr/local/Cellar/ffmpeg/2.8 --enable-shared
> --enable-pthreads --enable-gpl --enable-version3
> --enable-hardcoded-tables --enable-avresample --cc=clang
> --host-cflags= --host-ldflags= --enable-opencl --enable-libx264
> --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid
> --enable-libvorbis --enable-libvpx --enable-ffplay --enable-libopus
> --enable-vda
>   libavutil      54. 31.100 / 54. 31.100
>   libavcodec     56. 60.100 / 56. 60.100
>   libavformat    56. 40.101 / 56. 40.101
>   libavdevice    56.  4.100 / 56.  4.100
>   libavfilter     5. 40.101 /  5. 40.101
>   libavresample   2.  1.  0 /  2.  1.  0
>   libswscale      3.  1.101 /  3.  1.101
>   libswresample   1.  2.101 /  1.  2.101
>   libpostproc    53.  3.100 / 53.  3.100
>
> Input #0, avfoundation, from '0:0':
>   Duration: N/A, start: 52850.629467, bitrate: N/A
>     Stream #0:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 320x240,
> 17 tbr, 1000k tbn, 1000k tbc
>     Stream #0:1: Audio: pcm_f32le, 44100 Hz, stereo, flt, 2822 kb/s
> [libvpx-vp9 @ 0x7f85c3072400] v1.4.0
> [libopus @ 0x7f85c3088800] No bit rate set. Defaulting to 96000 bps.
> Output #0, webm, to 'video-audio.webm':
>   Metadata:
>     encoder         : Lavf56.40.101
>     Stream #0:0: Video: vp9 (libvpx-vp9), yuv444p, 320x240, q=-1--1,
> 200 kb/s, 17 fps, 1k tbn, 17 tbc
>     Metadata:
>       encoder         : Lavc56.60.100 libvpx-vp9
>     Stream #0:1: Audio: opus (libopus), 48000 Hz, stereo, flt, 96 kb/s
>     Metadata:
>       encoder         : Lavc56.60.100 libopus
> Stream mapping:
>   Stream #0:0 -> #0:0 (rawvideo (native) -> vp9 (libvpx-vp9))
>   Stream #0:1 -> #0:1 (pcm_f32le (native) -> opus (libopus))
> Press [q] to stop, [?] for help
> frame=   36 fps=1.8 q=0.0 Lsize=      54kB time=00:00:06.41 bitrate=
> 69.6kbits/s
> video:42kB audio:12kB subtitle:0kB other streams:0kB global
> headers:0kB muxing overhead: 2.447533%
>
> $ ffplay video-audio.webm
>
> * snip *
>
> Input #0, matroska,webm, from 'video-audio.webm': sq=    0B f=0/0
>   Metadata:
>     encoder         : Lavf56.40.101
>   Duration: 00:00:06.41, start: 0.004000, bitrate: 69 kb/s
>     Stream #0:0: Video: vp9 (Profile 1), yuv444p(tv), 320x240, SAR 1:1
> DAR 4:3, 17 fps, 17 tbr, 1k tbn, 1k tbc (default)
>     Stream #0:1: Audio: opus, 48000 Hz, stereo, fltp (default)
> 2015-10-11 21:09:30.166 ffplay[41579:227848] 21:09:30.166 WARNING:
> 140: This application, or a library it uses, is using the deprecated
> Carbon Component Manager for hosting Audio Units. Support for this
> will be removed in a future release. Also, this makes the host
> incompatible with version 3 audio units. Please transition to the
> API's in AudioComponent.h.
>    8.89 A-V:  0.050 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0
>
> 2015-10-11 3:59 GMT+09:00 Thilo Borgmann <thilo.borgmann at mail.de>:
>> Am 10.10.15 um 17:43 schrieb Kuu Miyazaki:
>>>> You will have to use the filters "video:audio" syntax, or the
>>> -audio/video_device_index options.
>>>
>>> Thank you very much.
>>> Now I can get a V+A file.
>>>
>>> Though the sound is still silent, the audio data itself seems to be included.
>>> I will try tweaking some parameters.
>>
>> My internal MIC works fine here - please report back if you don't get it
>> working.
>>
>> -Thilo
>>
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