how to redirect stdout stderr to zap logger?

[xiongchuan86]

I want to get output(stdout,stderr) from a log file

[u2takey]

you should write a adapter for logger which implement writer interface, example:

type LogAdapter struct{}

func (l *LogAdapter) Write(p []byte) (n int, err error) {
    log.Printf("%s", string(p))
    return len(p), nil
}

func TestWithLogger(t *testing.T) {
    err := ffmpeg.Input("./sample_data/in1.mp4", ffmpeg.KwArgs{"ss": "1"}).
        Output("./sample_data/out1.gif", ffmpeg.KwArgs{"s": "320x240", "pix_fmt": "rgb24", "t": "3", "r": "3"}).
        OverWriteOutput().WithOutput(&LogAdapter{}, &LogAdapter{}).Run()
    assert.Nil(t, err)
}