系统命令
package main
import (
"bytes"
"fmt"
"os/exec"
)
func main() {
in := bytes.NewBuffer(nil)
//linux
//cmd := exec.Command("sh")
//windows
cmd := exec.Command("cmd")
cmd.Stdin = in
go func() {
in.WriteString("echo hello world > test.txt\n")
in.WriteString("exit\n")
}()
if err := cmd.Run(); err != nil {
fmt.Println(err)
return
}
}
ffmpeg转码
func main() {
cmdArguments := []string{"-i", "divx.avi", "-c:v", "libx264",
"-crf", "20", "-c:a", "aac", "-strict", "-2", "video1-fix.ts"}
cmd := exec.Command("ffmpeg", cmdArguments...)
var out bytes.Buffer
cmd.Stdout = &out
err := cmd.Run()
if err != nil {
log.Fatal(err)
}
fmt.Printf("command output: %q", out.String())
}
ffmpeg录音
录音设备名由命令获取
ffmpeg -list_devices true -f dshow -i dummy
ffmpeg version git-2020-04-22-2e38c63 Copyright (c) 2000-2020 the FFmpeg developers
built with gcc 9.3.1 (GCC) 20200328
configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libsrt --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --disable-w32threads --enable-libmfx --enable-ffnvcodec --enable-cuda-llvm --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt
--enable-amf
libavutil 56. 42.102 / 56. 42.102
libavcodec 58. 80.100 / 58. 80.100
libavformat 58. 42.101 / 58. 42.101
libavdevice 58. 9.103 / 58. 9.103
libavfilter 7. 79.100 / 7. 79.100
libswscale 5. 6.101 / 5. 6.101
libswresample 3. 6.100 / 3. 6.100
libpostproc 55. 6.100 / 55. 6.100
[dshow @ 000001d6f042bbc0] DirectShow video devices (some may be both video and audio devices)
[dshow @ 000001d6f042bbc0] "Integrated Webcam"
[dshow @ 000001d6f042bbc0] Alternative name "@device_pnp_\\?\usb#vid_1bcf&pid_2b95&mi_00#6&1ca786e2&0&0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global"
[dshow @ 000001d6f042bbc0] DirectShow audio devices
[dshow @ 000001d6f042bbc0] "Line-In/Mic-In (SB X-Fi Surround 5.1)"
[dshow @ 000001d6f042bbc0] Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\wave_{FC795785-0F3D-483E-94A3-B8A1ADAC0520}"
[dshow @ 000001d6f042bbc0] "麦克风 (Realtek(R) Audio)"
[dshow @ 000001d6f042bbc0] Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\wave_{34BE0A01-C298-4CAA-88F7-87EFA5B666A6}"
[dshow @ 000001d6f042bbc0] "What U Hear (SB X-Fi Surround 5.1)"
[dshow @ 000001d6f042bbc0] Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\wave_{CC0A7A5D-9D3E-4AE7-8B81-89617B15CF5E}"
录音
func main() {
in := bytes.Buffer{}
outInfo := bytes.Buffer{}
cmd := exec.Command("cmd")
//cmd := exec.Command("ping", "www.163.com")
cmd.Stdout = &outInfo
cmd.Stdin = &in
//in.WriteString("echo hello world > test.txt\n")
// go func() {
// //in.WriteString("ffmpeg -f dshow -i audio=麦克风 (Realtek(R) Audio) -ar 16000 -ac 1 -t 00:00:05 test.wav\n")
// }()
//命令写入cmd.Stdin
in.WriteString("ffmpeg -f dshow -i audio=@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\\wave_{34BE0A01-C298-4CAA-88F7-87EFA5B666A6} -ar 16000 -ac 1 -t 00:00:05 test.wav -y \n")
//in.WriteString("ping www.baidu.com\n")
//in.WriteString("echo hello world\n")
// if err := cmd.Run(); err != nil {
// fmt.Println(err)
// return
// }
err := cmd.Start()
if err != nil {
fmt.Println(err.Error())
}
if err = cmd.Wait(); err != nil {
fmt.Println(err.Error())
} else {
fmt.Println(cmd.ProcessState.Pid())
//程序退出code
fmt.Println(cmd.ProcessState.Sys().(syscall.WaitStatus).ExitCode)
//输出结果
fmt.Println(outInfo.String())
}
}