golang 使用ffmpeg获取rtsp流截图,并生成缩略图
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golang 调用命令公共方法
func CallCommandRun(cmdName string, args []string) (string, error) {
cmd := exec.Command(cmdName, args...)
fmt.Println("CallCommand Run 参数=> ", args)
fmt.Println("CallCommand Run 执行命令=> ", cmd)
bytes, err := cmd.Output()
if err != nil {
fmt.Println("CallCommand Run 出错了.....", err.Error())
fmt.Println(err)
return "", err
}
resp := string(bytes)
fmt.Println(resp)
fmt.Println("CallCommand Run 调用完成.....")
return resp, nil
}
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golang直接使用命令调用ffmpeg 获取rtsp码流截图
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ffmpeg命令
./ffmpeg -rtsp_transport tcp -timeout 10000000 -y -i rtsp://username:password@ip:554/chID=00000001-0000-0000-0000-000000000000 -ss 00:00:01 -vframes 1 -f image2 -vcodec png image.png
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go 程序取流截图
// 根据URL调用ffmpeg 获取截图
func GetIpcScreenShot(ffmpegPath string, url string, screenShotPath string) string {
var params []string
params = append(params, "-rtsp_transport")
params = append(params, "tcp")
params = append(params, "-timeout")
// 10s
params = append(params, "10000000")
params = append(params, "-y")
params = append(params, "-i")
params = append(params, url)
params = append(params, "-ss")
params = append(params, "00:00:02")
params = append(params, "-vframes")
params = append(params, "1")
params = append(params, "-f")
params = append(params, "image2")
params = append(params, "-vcodec")
params = append(params, "png")
params = append(params, screenShotPath)
resp, err := CallCommandRun(ffmpegPath, params)
if err != nil {
fmt.Println(err.Error())
fmt.Println("获取截图出错，url为--->", url)
}
return resp
}
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使用imaging包将第二步获取的截图生成缩略图
github.com/disintegration/imaging
// 将截图生成缩略图
func GetThumbnail(screenShotPath string) error {
src, err := imaging.Open(screenShotPath)
if err != nil {
fmt.Println("生成缩略图，打开截图文件失败--->", err)
return err
}
// 220 * 140 宽220px, 高140px
dsc := imaging.Resize(src, 220, 140, imaging.Lanczos)
err = imaging.Save(dsc, screenShotPath)
if err != nil {
fmt.Println("生成缩略图失败--->", err)
return err
}
return nil
}
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