[FFmpeg-user] ffmpeg reports no colorkey filter

[Paul B Mahol]

On 6/28/15, qw <applemax82 at 163.com> wrote:
> Hi,
>
>
> I use the below command to run colorkey filter, but ffmpeg report there is
> no colorkey filter:
>
>
> [root at localhost ffmpegOverlay]# ffmpeg -i ./transparent_3.png -vf
> colorkey=green ./transparent_3_test1.png
> ffmpeg version 2.7.1 Copyright (c) 2000-2015 the FFmpeg developers
>   built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-11)
>   configuration: --enable-gpl --enable-libx264
>   libavutil      54. 27.100 / 54. 27.100
>   libavcodec     56. 41.100 / 56. 41.100
>   libavformat    56. 36.100 / 56. 36.100
>   libavdevice    56.  4.100 / 56.  4.100
>   libavfilter     5. 16.101 /  5. 16.101
>   libswscale      3.  1.101 /  3.  1.101
>   libswresample   1.  2.100 /  1.  2.100
>   libpostproc    53.  3.100 / 53.  3.100
> Input #0, png_pipe, from './transparent_3.png':
>   Duration: N/A, bitrate: N/A
>     Stream #0:0: Video: png, rgba(pc), 256x256, 25 tbr, 25 tbn, 25 tbc
> [AVFilterGraph @ 0x1d1e900] No such filter: 'colorkey'
> Error opening filters!
>
>
> I find ffmpeg supports colorkey filter as shown below. But why does ffmpeg
> report there is no colorkey filter?
> http://ffmpeg.org/ffmpeg-filters.html#colorkey
>
>
> Thanks!
>
>
> Andrew
>
>
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