export method

Future<bool> export(String input, int? fps, String output)

Implementation

Future<bool> export(String input, int? fps, String output) async {
  var path = this.path;

  if (type == FileType.asset) {
    path = await moveAssetToTemp(path);
  }

  final buffer = StringBuffer();

  final overlay = 'overlay=${x ?? '(W-w)/2'}:${y ?? '(H-h)/2'}';

  if (height != null || width != null) {
    buffer.write(
      '[1:v]scale=${height ?? -1}:${width ?? -1}[ov];[0:v][ov]$overlay;',
    );
  } else {
    buffer.write('"[0:v][1:v]$overlay;"');
  }

  final audiocmd = [
    if (isMute) ...['-an', ' -c:v'] else '-c:a',
  ];

  return ffmpeg.execute([
    '-i',
    input,
    if (fps != null) ...['-r', '$fps'],
    '-i',
    path,
    '-filter_complex',
    buffer.toString(),
    ...audiocmd,
    'copy',
    output,
    '-y',
  ]);
}