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I asked the librarian if he knew how to fix glitches with the Playhead* in the progress bar in both the Windows Movies & TV App (henceforth MTVApp), and Windows Media Player (henceforward WMP)....
#1: Initial revision
by
Vaug
·
2026-08-12T19:09:09Z (about 1 month ago)
Why does LosslessCut loosen the Playhead in the Progress Bar in Movies & TV app, and Windows Media Player?
I asked the librarian if he knew how to fix glitches with the [Playhead*](https://www.axon.com/help/justice/images/dems/evidence.com__overall_dems_/evidence/using_the_media_player/ga_june-media_player_controls.png ) in [the progress bar](https://www.reddit.com/r/words/comments/1exfpwh/comment/lj5n3vs) in both the Windows Movies & TV App (henceforth MTVApp), and Windows Media Player (henceforward WMP). I tried to play the same .mp4 file in MPC-HC, Movies & TV App , WMP. The playhead in the [scrub bar](https://www.reddit.com/r/NoStupidQuestions/comments/2w7169/comment/coo85sz/) of MPC-HC worked normally. >[Just as an FYI, in the video industry we call that action of moving along the timeline of a video by dragging the play head "scrubbing", though of course "scrolling" did get your point across fine!](https://old.reddit.com/r/ffmpeg/comments/ju9obp/how_to_fix_mp4_videos_that_do_not_scroll_properly/gcas9j9) >[The act of moving the playhead left or right is called scrubbing.](https://www.reddit.com/r/NoStupidQuestions/comments/2w7169/comment/coo85sz/) But I can’t scrub in MTApp, or WMP. When I click anywhere on the [seek bar](https://www.reddit.com/r/NoStupidQuestions/comments/2w7169/comment/coo9ha9), the Playhead never moves to the point at which my mouse cursor is pointing. Instead, the Playhead always remain stuck at the origin on the far left. The librarian downloaded [LosslessCut]( https://losslesscut.app), opened my .mp4 in it, and exported it as another .mp4. This new .mp4 has the same size as my original, but it works! When I play this new .mp4 in MTVApp & WMP, I can scrub! But why? Why does LosslessCut slacken the playhead? #### *Pictures of Playhead  From https://developer.amazon.com/docs/vega-api/0.22/vega-epg.html 