Filename's contains special characters that are not handled properly by other libraries

[jpetro416]

Filename's contains special characters that are not handled properly by other libraries. For example, the colon character (:) as well as a comma "," in the filename is causing issues with the compression libs out there, as it's not a valid character in a file name on some operating systems.

Compression lib trying to access the file generated from:

 await _trimmer.saveTrimmedVideo(
      startValue: _startValue,
      endValue: _endValue,
      onSave: (outputPath) {  

Error:

Fatal error while transcoding, this might be invalid format or bug in engine or Android.
E/Transcoder( 4788): java.lang.IllegalArgumentException: could not access /data/user/0/com.myapp.app/app_flutter/Trimmer/tuts_map_trimmed:Apr28,2023-09:45:54.mp4
E/Transcoder( 4788): 	at android.media.MediaMetadataRetriever.setDataSource(MediaMetadataRetriever.java:370)

Code in video_trimmer that needs to be changed:
videoFileName ??= "${videoName}_trimmed:$formattedDateTime";
Recommendation:
videoFileName ??= "${videoName}_trimmed_$formattedDateTime";

    formattedDateTime = formattedDateTime.replaceAll(':', '_');
    videoFileName = videoFileName.replaceAll(' ', '_');
    videoFileName = videoFileName.replaceAll(',', '_');
    videoFileName = videoFileName.replaceAll(':', '_');
    videoFileName = videoFileName.replaceAll('-', '_');