Video on timeline corrupts after a failed export

made a short video, export with yotube preset, select file and overwrite it, turns out the export failed
i decided to export it again only to realize the mp4 videos on the timeline are ofcourse there but with removed sounds and theyre nothing except one frame , individual mp3 files work properly, the video files just dont, its like someone took one frame and stretched it to the lenght the video was originally set to before the export

Without a lot more information it would be impossible for anyone to help solve the issue you are having.

More information would include the following:

  • Shotcut version number (Help - About Shotcut)
  • Video Mode used
    • To view Video Mode settings, click on Output, then Properties
  • Computer specifications (CPU/Ram) (Minimum system requirements)
  • Operating system (Windows/macOS/Linux)
  • Source video specifications as shown in Shotcut’s Property window
    • Click on a video clip, then click on Properties
  • Did you use Advanced with Export settings? If so, what did you change?
  • Export settings, is the Use hardware encoder option checked or unchecked?
  • Filters used

shotcut version 22.01.30
HD 1080p 60 fps
intel i7-7700HQ CPU 2.80 GHz , GTX 1070 8 GB VRAM 24 GB of RAM
Windows 10 Home
Specifications 1920x1080 h264 60 fps
didnt use advanced settings
not ticked
no filters

edit: failed export log
[libx264 @ 00000187e8ebc4c0] using SAR=1/1 [libx264 @ 00000187e8ebc4c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2 [h264 @ 00000187e8968840] Reinit context to 1920x1088, pix_fmt: yuv420p [libx264 @ 00000187e8ebc4c0] profile High, level 4.2, 4:2:0, 8-bit [libx264 @ 00000187e8ebc4c0] 264 - core 161 r3039M 544c61f - H.264/MPEG-4 AVC codec - Copyleft 2003-2021 - http://www.videolan.org/x264.html - options: cabac=1 ref=2 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=6 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=2 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=1 keyint=15 keyint_min=1 scenecut=40 intra_refresh=0 rc_lookahead=15 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00 [mov,mp4,m4a,3gp,3g2,mj2 @ 00000187ee602580] Format mov,mp4,m4a,3gp,3g2,mj2 detected only with low score of 1, misdetection possible! [mov,mp4,m4a,3gp,3g2,mj2 @ 00000187ee602580] moov atom not found [AVIOContext @ 00000187ee4fc900] Statistics: 0 bytes read, 0 seeks Failed with exit code -1073741819 Failed with exit code -1073741819

You say:

Was by any chance the file that you attemted to overwrite the original source file? If so, restore the original source video and your project should now be OK. Then try exporting it to a different (new) file.