FFmpegKit helper with imagesToVideo, imagesToGif, videoToGif helper

ffmpegkit_helper.dart

import 'dart:developer' as dev;
import 'dart:io';

import 'package:ffmpeg_kit_flutter/ffmpeg_kit.dart';
import 'package:path_provider/path_provider.dart';
import 'package:share_plus/share_plus.dart';

class FFMPEGKITHelper {
  // image files should be stored in numbered format like 1.png, 2.png, 3.png etc to work with ffmpeg
  static Future<String> imagesToMp4(List<File> images) async {
 
    final tempDir = await getTemporaryDirectory();
    final createdOn = DateTime.now();
    final fileName = createdOn.millisecondsSinceEpoch.toString();
    final outputPath = '${tempDir.path}/$fileName.mp4';
  

    final directory = '${images.first.parent.path}/%d.png';

    final String ffmpegCommand = '-y -i $directory -qscale:v 1  $outputPath';

    final session = await FFmpegKit.execute(
      ffmpegCommand,
    );
    await session.getOutput();

    final capturedVideo = XFile(outputPath);

    return capturedVideo.path;
  }

  static Future<String> imagesToGif(List<File> images) async {
    final tempDir = await getTemporaryDirectory();
    final appDir = await getApplicationDocumentsDirectory();
    final String outputPath = '${tempDir.path}/captured_gif.gif';
    final String palletePath = '${appDir.path}/palette.png';
    final directory = '${images.first.parent.path}/%d.png';
    final generatePalette =
        "-y -framerate 30 -i $directory -vf 'palettegen' $palletePath";
    final session1 = await FFmpegKit.execute(
      generatePalette,
    );

    final returnCode1 = await session1.getOutput();
    dev.log(returnCode1.toString());
    final String usePalette =
        '-y -framerate 30 -i $directory -i $palletePath -lavfi "paletteuse" -qscale:v 1  $outputPath';

    final session = await FFmpegKit.execute(
      usePalette,
    );

    final returnCode = await session.getOutput();
    dev.log(returnCode.toString());

    final capturedGif = XFile(outputPath);

    return capturedGif.path;
  }

  static Future<String> videoToGif(File mp4File, String outputPath) async {
    final command =
        "-y -i ${mp4File.path} -vf 'fps=25,scale=320:-1:flags=lanczos,split[s0][s1];[s0]palettegen[p];[s1][p]paletteuse' $outputPath";

    final session = await FFmpegKit.execute(
      command,
    );

    return outputPath;
  }
}