视频的第一帧

如评论中所建议，使用ffmpeg是最简单的方法。以下是改编自此答案的示例：

package mainimport (    "bytes"    "fmt"    "os/exec")func main() {    filename := "test.mp4"    width := 640    height := 360    cmd := exec.Command("ffmpeg", "-i", filename, "-vframes", "1", "-s", fmt.Sprintf("%dx%d", width, height), "-f", "singlejpeg", "-")    var buffer bytes.Buffer    cmd.Stdout = &buffer    if cmd.Run() != nil {        panic("could not generate frame")    }    // Do something with buffer, which contains a JPEG image}