Handle videos without sound

[iliatimofeev]

Crushing it is not the best behavior.

[iliatimofeev]

nput #0, mov,mp4,m4a,3gp,3g2,mj2, from 'session_data/2023-07-03_12:52:29/video.mov':
  Metadata:
    major_brand     : qt  
    minor_version   : 0
    compatible_brands: qt  
    creation_time   : 2022-12-15T23:15:09.000000Z
    com.apple.quicktime.make: Apple
    com.apple.quicktime.model: MacBookPro16,1
    com.apple.quicktime.software: macOS 12.3.1 (21E258)
    com.apple.quicktime.creationdate: 2022-12-15T18:09:40-0500
  Duration: 00:01:15.52, start: 0.000000, bitrate: 3695 kb/s
  Stream #0:0[0x1](und): Video: hevc (Main) (hvc1 / 0x31637668), yuv420p(tv, bt709), 1918x1078, 3689 kb/s, 59.99 fps, 60 tbr, 6k tbn (default)
    Metadata:
      creation_time   : 2022-12-15T23:15:09.000000Z
      handler_name    : Core Media Video
      vendor_id       : [0][0][0][0]
      encoder         : HEVC
Stream map '0:a' matches no streams.
To ignore this, add a trailing '?' to the map.

mov