Snapshot continuously generates pictures by video frame

[lgcshy]

Hello! I'd like to ask about the snapshot example about generating pictures. I plan to save every frame of the video stream from the camera to a directory on the server. Do I just need to use io. Writer writes bytes to os. File object is fine. Delete the return code below: `// Encode to (RGB) jpeg buffer := new(bytes.Buffer) if err = jpeg.Encode(buffer, img, nil); err != nil { panic(err) }

            // Serve image
            w.Header().Set("Content-Type", "image/jpeg")
            w.Header().Set("Content-Length", strconv.Itoa(len(buffer.Bytes())))

            // Write jpeg as HTTP Response
            if _, err = w.Write(buffer.Bytes()); err != nil {
                    panic(err)
            }
            return`

[lgcshy]

`func (t *TrackWriter) start() { for { pkt, _, err := t.track.ReadRTP() if err != nil { log.Println("read rtp error: ", err) break } t.sb.Push(pkt) // Use SampleBuilder to generate full picture from many RTP Packets sample := t.sb.Pop() if sample == nil { log.Println("sample is nil") continue }

    // Read VP8 header.
    videoKeyframe := (sample.Data[0]&0x1 == 0)
    if !videoKeyframe {
        log.Println("not video keyframe")
        continue
    }
    // Begin VP8-to-image decode: Init->DecodeFrameHeader->DecodeFrame
    t.decoder.Init(bytes.NewReader(sample.Data), len(sample.Data))

    // Decode header
    if _, err := t.decoder.DecodeFrameHeader(); err != nil {
        log.Println("decode frame header error: ", err)
        continue
    }

    // Decode Frame
    img, err := t.decoder.DecodeFrame()
    if err != nil {
        log.Println("decode frame error: ", err)
        continue
    }

    // Encode to (RGB) jpeg
    buffer := new(bytes.Buffer)
    if err = jpeg.Encode(buffer, img, &jpeg.Options{Quality: 100}); err != nil {
        log.Println("encode jpeg error: ", err)
        continue
    }
    // write to file
    fileName := fmt.Sprintf("%s-%s.jpg", t.track.Kind().String(), time.Now().Format("2006-01-02-15-04-05"))
    if err = os.WriteFile(fileName, buffer.Bytes(), 0644); err != nil {
        log.Println("write file error: ", err)
        continue
    }
}

}`

The above code can only get one picture, and then it will be judged that the keyframe is unsuccessful. My encoder is vp8 encoder

[lgcshy]

can anyone help