Decoding issue perhaps? What's the media? https://www.vegascreativesoftware.info/us/forum/faq-how-to-post-mediainfo-and-vegas-pro-file-properties--104561/

What's the GPU model?

You can try re-encoding it and replacing the file as a workaround. I use https://www.shutterencoder.com/

@RogerS - I don't think we'll see @lamayapat again. I could be wrong?

GPU: NVIDIA GeForce RTX 2080 Ti

Version: Sony Vegas 19

Media of the file:

Yes @Grazie you're wrong 😁

And you are you too 😉. You don’t have a SONY product. You have a MAGIX product, called VegasPro 19.

Now that you’re back let’s see what we can do. 😎

Version: Sony Vegas 19

If you bought/obtained Sony Vegas Pro 19 from a website advertising it as being 'Sony", you've got a pirated / cracked version of Vegas Pro 19. If you bought it from the official VEGAS website, there is absolutely no mention of 'Sony' in the product's name - and hasn't been from Vegas Pro 14 onwards - and that's 7 years ago.

@Dexcon Now, let’s if @lamayapat  returns. I do hope so.

It's indeed MAGIX my bad not Sony, and it's a paid version. I've been using it for so long that "sony vegas" is what sticked to my brain.

@lamayapat - OK, now we are on the same page, what is the BUILD number of VP19 you have? There may well have been fixes we are not aware of.

Would be better to copy and paste the MediaInfo so we can see all of it.

What I gather from this is that it is 8-bit 4:4:4 AVC, which is an unusual format. (anime rip?) If it were me I'd convert it all to ProRes 422 (or 444) and not worry about glitches.

You can try other workarounds like in preferences/ file io turning hardware decoder to none (from presumably NVDEC) You could also check "enable legacy AVC decoding" in case it works better here (will put more strain on your CPU though as the GPU won't be doing decoding for any AVC files).

@Grazie build 651

@RogerS you mention that 4:4:4 AVC is an usual format, what would be an usual one?

General
Format                                   : MPEG-4
Format profile                           : Base Media / Version 2
Codec ID                                 : mp42 (mp42/iso2/avc1/mp41)
File size                                : 13.6 MiB
Duration                                 : 6 min 59 s
Overall bit rate                         : 271 kb/s
Frame rate                               : 30.000 FPS
Recorded date                            : 2023/08/18 13:56:08
Encoded date                             : 2023-08-24 12:00:15 UTC
Tagged date                              : 2023-08-24 12:00:15 UTC
Writing application                      : HandBrake 1.6.1 2023012300

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High@L4
Format settings                          : CABAC / 4 Ref Frames
Format settings, CABAC                   : Yes
Format settings, Reference frames        : 4 frames
Codec ID                                 : avc1
Codec ID/Info                            : Advanced Video Coding
Duration                                 : 6 min 59 s
Bit rate                                 : 268 kb/s
Width                                    : 1 920 pixels
Height                                   : 1 080 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 30.000 FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.004
Stream size                              : 13.4 MiB (99%)
Writing library                          : x264 core 164 r3100 ed0f7a6
Encoding settings                        : cabac=1 / ref=4 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=8 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=24 / lookahead_threads=4 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=300 / keyint_min=30 / scenecut=40 / intra_refresh=0 / rc_lookahead=50 / rc=crf / mbtree=1 / crf=20.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / vbv_maxrate=25000 / vbv_bufsize=31250 / crf_max=0.0 / nal_hrd=none / filler=0 / ip_ratio=1.40 / aq=1:1.00
Encoded date                             : 2023-08-24 12:00:15 UTC
Tagged date                              : 2023-08-24 12:00:15 UTC
Color range                              : Limited
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709
Codec configuration box                  : avcC

Writing application                      : HandBrake 1.6.1 2023012300

Thank you for uploading the MediaInfo report. Is there a specific reason that you've used HandBrake to transcode the video. What happens if you use the camera original in Vegas Pro?

Oops, my bad wrong file, thank you for pointing this out! I was trying out different stuff and with handbrake it works however the quality decreases a lot and I'm looking to fix the original file

Here's the correct one:

General
Complete name                            : D:\0000-25159_.mp4
Format                                   : MPEG-4
Format profile                           : Base Media
Codec ID                                 : isom (isom/iso2/avc1/mp41)
File size                                : 145 MiB
Duration                                 : 6 min 59 s
Overall bit rate                         : 2 894 kb/s
Frame rate                               : 60.000 FPS
Recorded date                            : 2023/08/18 13:56:08
Writing application                      : Lavf59.27.100

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High 4:4:4 Predictive@L4.2
Format settings                          : CABAC / 4 Ref Frames
Format settings, CABAC                   : Yes
Format settings, Reference frames        : 4 frames
Codec ID                                 : avc1
Codec ID/Info                            : Advanced Video Coding
Duration                                 : 6 min 59 s
Bit rate                                 : 2 888 kb/s
Width                                    : 1 920 pixels
Height                                   : 1 080 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 60.000 FPS
Chroma subsampling                       : 4:4:4
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.023
Stream size                              : 144 MiB (100%)
Writing library                          : x264 core 164 r3099 e067ab0
Encoding settings                        : cabac=1 / ref=3 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=7 / 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=4 / threads=24 / lookahead_threads=4 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=1 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=crf / mbtree=1 / crf=1.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
Codec configuration box                  : avcC

For high quality, low compression formats something like ProRes or MagicYUV would work well in VEGAS.

It the source is > 8 bit consider keeping it as 10-bit.
If it needs the color precision of 4:4:4 preserve that.

This Handbrake conversion is odd- why go from 60fps to 30fps and 4:4:4 to 4:2:0? For quality the "production standard" preset should be a better starting point. Keep keyint= your framerate, not 10x your framerate.

Personally I'd go to 10-bit ProRes for VEGAS (there are others people use for animation but they rely on the 32-bit Quicktime plugin in VEGAS so I'd avoid them).

I'm going through a very similar problem. I play a video on my Vegas Pro 21, and in some frames it looks like a few pixels. I render to see if the pexels come out, but I continue with them. Can anyone help me resolve this problem?

@MARCOS-ANTONIO Please make a new post for your issue. It looks like a decoding problem so we'd also want to know your MediaInfo, your GPU and which build of 21 you are using.

Where can I find my MediaInfo?

There are instructions in the hyperlink.