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• In Flutter, how to get image pixel

  12 janvier 2024, par Pianone

  my code here

  


  var response = await Dio().get(
   url,
   options: Options(responseType: ResponseType.bytes)
);
Uint8List? srcImage = Uint8List.fromList(response.data);
Uint8List? watermark = await captureWaterMark();
Image i = Image.memory(srcImage!);
//how can I get the pixel (Image i) such like 1920*1080 or just width/hight pixel
...tell me how to do...
srcImage = await addWaterMarkByFfmpegCommand(srcImage, watermark);
   final result = await ImageGallerySaver.saveImage(
      srcImage!, name: name,
   );


  


  i need get the pic pixel so that i can use it in ffmpeg command, it a func that add a watermark into srcImage, but cause their pixel ratio too diff to adapted watermark

  


  i try to get pixel from ffmpeg... but i failed

  


  /// addWaterMark by using ffmpeg Command
Future addWaterMarkByFfmpegCommand(Uint8List srcImg, Uint8List watermark) async {
  try {
    final Directory tempDir = await Directory.systemTemp.createTemp();
    final File image1File = File('${tempDir.path}/srcImg.jpg');
    await image1File.writeAsBytes(srcImg);
    final File image2File = File('${tempDir.path}/watermark.png');
    await image2File.writeAsBytes(watermark);

    final String outputFilePath = '${tempDir.path}/output.jpg';
    //when i get srcImage pixel, the positions in bold(iw*1) in the following commands will be replaced to make watermark adapted
    final String command =
        '-i ${image1File.path} -i ${image2File.path} -filter_complex "[1:v]scale=**iw*1**:-1[v1];[0:v][v1]overlay=10:10" -frames:v 1 $outputFilePath';
    await FFmpegKit.execute(command);

    final File outputFile = File(outputFilePath);
    final Uint8List outputBytes = await outputFile.readAsBytes();
    return outputBytes;
  } catch (e) {
    print('Error executing ffmpeg command: $e');
  }
  return null;
}


  


  ps : i am new to flutter and ffmpeg, plz help me, I'd appreciate, thanks alot

  


• ffmpeg restream rtsp to mjpeg

  20 septembre 2015, par JpaytonWPD

  I have a few IP cameras that stream 720 X264 video over rtsp. The streams are really unreliable when viewing on Android. They also fail if more then 2 connections are made.

  I have a ubuntu server that I can use to connect and restream as mjpeg or something else. There are tons of different commands out there but they all seem to involve transcoding the video.

  How can I simply restream the live rtsp feed as a mjpeg without doing anything to the video itself ? Theres no audio so no worries there.

• Restream an MJPEG from Axis IP Camera

  4 avril 2015, par FoleyX90

  Basically we have an IP camera set up offsite and we want people to be able to access the camera’s stream. Instead of everybody hitting the camera directly though, I need to our server to be able to grab the camera’s stream and distribute that to the users on the website. That way, there’s only 1 connection to the camera but we can handle many connections on our server. What tools should I use for this ? I’m very experienced in PHP and have some experience in FFMPEG but I can’t seem to find the right solution.