Fails to merge clips when video have no audi stream

[espux]

When the video only have a Video stream and no Audio stream Vidcutter fails with the following message in the log.

  Metadata:

    major_brand     : isom

    minor_version   : 512

    compatible_brands: isomiso2avc1mp41

    encoder         : Lavf62.3.100

  Duration: 00:26:10.63, start: 0.017000, bitrate: 7012 kb/s

  Stream #0:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(progressive), 1920x1080 [SAR 1:1 DAR 16:9], 7003 kb/s, 60 fps, 60 tbr, 90k tbn, start 0.017000 (default)

    Metadata:

      handler_name    : Video

      vendor_id       : [0][0][0][0]

      encoder         : OvenMediaEngine

At least one output file must be specified
2026-03-26 22:27 - root - CRITICAL -   File "vidcutter\videocutter.py", line 1390, in saveMedia
  File "vidcutter\videocutter.py", line 1434, in joinMedia
  File "vidcutter\libs\videoservice.py", line 608, in isMPEGcodec
  File "vidcutter\libs\videoservice.py", line 268, in codecs

2026-03-26 22:27 - root - CRITICAL - <class 'AttributeError'>: 'NoneType' object has no attribute 'group'