[FFmpeg-user] capture from camera (macOS) and pass video to ffplay

[Kieran O Leary]

Hi

On Wed, 12 Sep 2018, 17:09 Peter Gusev, <gpeetonn at gmail.com> wrote:

> Hi! well I'm sure the ones I tried are incorrect as I'm not familiar with
> ffmpeg much. But here's one of them:
>
> ffmpeg -f avfoundation -framerate 30 -i "0" -f rawvideo -pix_fmt argb - |
> ffplay -f rawvideo -s1280x720 -pix_fmt argb -i -
>

Put a space between -s and 1280x720

ffmpeg version 3.4ffplay version 3.4 Copyright © 2000-2017 the FFmpeg
> developers Copyright © 2003-2017 the FFmpeg developers
>
>   built with Apple LLVM version 9.0.0 (clang-900.0.38)
>   built with Apple LLVM version 9.0.0 (clang-900.0.38)
>   configuration: --prefix=/usr/local/Cellar/ffmpeg/3.4 --enable-shared
> --enable-pthreads --enable-version3 --enable-hardcoded-tables
> --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-gpl
> --enable-ffplay --enable-libmp3lame --enable-libx264 --enable-libxvid
> --enable-opencl --enable-videotoolbox --disable-lzma
>   configuration: --prefix=/usr/local/Cellar/ffmpeg/3.4 --enable-shared
> --enable-pthreads --enable-version3 --enable-hardcoded-tables
> --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-gpl
> --enable-ffplay --enable-libmp3lame --enable-libx264 --enable-libxvid
> --enable-opencl --enable-videotoolbox --disable-lzma
>   libavutil      55. 78.100 / 55. 78.100
>   libavutil      55. 78.100 / 55. 78.100
>   libavcodec     57.107.100 / 57.107.100
>   libavcodec     57.107.100 / 57.107.100
>   libavformat    57. 83.100 / 57. 83.100
>   libavformat    57. 83.100 / 57. 83.100
>   libavdevice    57. 10.100 / 57. 10.100
>   libavdevice    57. 10.100 / 57. 10.100
>   libavfilter     6.107.100 /  6.107.100
>   libavfilter     6.107.100 /  6.107.100
>   libavresample   3.  7.  0 /  3.  7.  0
>   libavresample   3.  7.  0 /  3.  7.  0
>   libswscale      4.  8.100 /  4.  8.100
>   libswscale      4.  8.100 /  4.  8.100
>   libswresample   2.  9.100 /  2.  9.100
>   libswresample   2.  9.100 /  2.  9.100
>   libpostproc    54.  7.100 / 54.  7.100
>   libpostproc    54.  7.100 / 54.  7.100
> Failed to set value '-pix_fmt' for option 's1280x720': Option not found
>

The lack of a space is causing this error.

Best,

Kieran