Some Mpeg2 files do not import correctly

Former user wrote on 8/16/2021, 7:09 PM

Disclaimer: I don't expect to get any help on this one since I'm not providing the "required" information. Plus, I've since uninstalled the program.

OS: Windows 10 1909

Hardware: Asus MB, Intel i9, 32GB Ram, Nvidia RTX series video

Program: Vegas Pro (edit) 18 Trial (All Default Settings)

Problem: Corrupted (?) truncated, sometimes pixelated MPG 2 videos upon import

I found that some (short < 3 minute) mpg (mpeg 2 files), do not import correctly using VP18 edit. This does not happen with Vegas Movie Studio 16 or VP9. When I imported them and dragged them to the timeline, the first few seconds appeared to be from the end of the same video. Then the normal start of the video was truncated by roughly the same amount (essentially paste and cut in). On some of these videos, there was obvious pixilation in places. I tried repeating the process with several different files by either importing and the dragging to the timeline or directly dragging the file to timeline.

I could not see that there was anything unusual with the properties of each video (Format, Resolution, Frame Rate, Wrapper, Codec, Bitrate...etc). In fact, out of the ten or so I tested, there were only 3. I had no other format issues, such as MP4/H264/AAC.

I was pretty excited to go with VP18, but this particular issue makes it difficult to use without re-encoding the problematic videos.

Thanks for reading this.

Mike

General

mp1b

Format                                   : MPEG-PS
File size                                : 159 MiB
Duration                                 : 3 min 51 s
Overall bit rate mode                    : Variable
Overall bit rate                         : 5 755 kb/s

Video
ID                                       : 224 (0xE0)
Format                                   : MPEG Video
Format version                           : Version 2
Format profile                           : Main@Main
Format settings                          : BVOP
Format settings, BVOP                    : Yes
Format settings, Matrix                  : Default
Format settings, GOP                     : M=3, N=12
Duration                                 : 3 min 51 s
Bit rate mode                            : Variable
Bit rate                                 : 5 449 kb/s
Maximum bit rate                         : 7 000 kb/s
Width                                    : 720 pixels
Height                                   : 576 pixels
Display aspect ratio                     : 4:3
Frame rate                               : 25.000 FPS
Standard                                 : PAL
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Compression mode                         : Lossy
Bits/(Pixel*Frame)                       : 0.526
Time code of first frame                 : 00:00:00:00
Time code source                         : Group of pictures header
GOP, Open/Closed                         : Open
Stream size                              : 150 MiB (95%)

Audio
ID                                       : 189 (0xBD)-128 (0x80)
Format                                   : AC-3
Format/Info                              : Audio Coding 3
Commercial name                          : Dolby Digital
Muxing mode                              : DVD-Video
Duration                                 : 3 min 51 s
Bit rate mode                            : Constant
Bit rate                                 : 192 kb/s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 48.0 kHz
Frame rate                               : 31.250 FPS (1536 SPF)
Compression mode                         : Lossy
Stream size                              : 5.30 MiB (3%)
Service kind                             : Complete Main

General

mp2b

Format                                   : MPEG-PS
File size                                : 242 MiB
Duration                                 : 3 min 38 s
Overall bit rate mode                    : Variable
Overall bit rate                         : 9 300 kb/s

Video
ID                                       : 224 (0xE0)
Format                                   : MPEG Video
Format version                           : Version 2
Format profile                           : Main@Main
Format settings                          : CustomMatrix / BVOP
Format settings, BVOP                    : Yes
Format settings, Matrix                  : Custom
Format settings, GOP                     : M=3, N=12
Format settings, picture structure       : Frame
Duration                                 : 3 min 38 s
Bit rate mode                            : Variable
Bit rate                                 : 8 731 kb/s
Maximum bit rate                         : 9 282 kb/s
Width                                    : 720 pixels
Height                                   : 576 pixels
Display aspect ratio                     : 4:3
Frame rate                               : 25.000 FPS
Standard                                 : PAL
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Interlaced
Scan order                               : Top Field First
Compression mode                         : Lossy
Bits/(Pixel*Frame)                       : 0.842
Time code of first frame                 : 00:06:42:19
Time code source                         : Group of pictures header
GOP, Open/Closed                         : Open
Stream size                              : 228 MiB (94%)
Color primaries                          : BT.601 PAL
Transfer characteristics                 : BT.470 System B/G
Matrix coefficients                      : BT.470 System B/G

Audio
ID                                       : 189 (0xBD)-128 (0x80)
Format                                   : AC-3
Format/Info                              : Audio Coding 3
Commercial name                          : Dolby Digital
Muxing mode                              : DVD-Video
Duration                                 : 3 min 38 s
Bit rate mode                            : Constant
Bit rate                                 : 384 kb/s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 48.0 kHz
Frame rate                               : 31.250 FPS (1536 SPF)
Compression mode                         : Lossy
Delay relative to video                  : 136 ms
Stream size                              : 10.0 MiB (4%)
Service kind                             : Complete Main

Comments

Musicvid wrote on 8/16/2021, 8:39 PM

Since you are aware of the information needed for peer support, best of luck and thanks for sharing your story. It's an unusual one.

RogerS wrote on 8/16/2021, 9:09 PM

At least post MediaInfo for these videos so we have some idea what you are talking about.
https://www.vegascreativesoftware.info/us/forum/faq-how-to-post-mediainfo-and-vegas-pro-file-properties--104561/

Former user wrote on 8/16/2021, 10:24 PM

Added and amended OP. Besides working fine with Vegas Studio 16, these also look fine in VLC, Handbrake and a couple of other programs I have.

Musicvid wrote on 8/17/2021, 7:04 PM

Are these broadcast recordings?

Musicvid wrote on 8/17/2021, 7:57 PM

If they are downloads, it's hard to tell how many generations of encodes (or miscodes) they've been through. We call these "Frankenfiles." It's not unusual for them to play fine but not open correctly in an NLE. But since you say they opened in a previous version of Vegas, it remains curious. Assuming they are legit, non-copyrighted files, feel free to upload one that isn't working correctly to Drive or Dropbox. Otherwise, there isn't much help available, sorry to say.

Musicvid wrote on 8/17/2021, 8:54 PM

If you'll post that URL I'll check out the downloads and report back to you.

Former user wrote on 8/17/2021, 9:54 PM

Oh dear. My bad assumption So, that "digital" noise is the tail end of the video, looped back to the beginning.. Oh strange?

Musicvid wrote on 8/18/2021, 8:09 AM

That site features downloads of low-quality rips and screen recordings of possibly copyrighted material. A look at my signature should tell you why, even though retired, I cannot comment further.

You may be OK with personal use, but many of our forum regulars earn income from producing, selling, and distributing original, copyrighted content; thus, the appearance of conflicts of interest needs to be considered.

The forum terms of use statement on piracy is in Section 5 here:

https://www.vegascreativesoftware.info/us/community-rules/

MMiles wrote on 8/18/2021, 3:24 PM

Well, when I deleted my post with the offending link, my account got deleted. Probably something I clicked, so I had to create a new account.

Anyway, for the record, the problem Mpg's also don't import correctly in VP19. However, they import and work fine without error in VP17.

Thanks for all those that helped.

Mike

Musicvid wrote on 8/18/2021, 5:51 PM

FWIW, The file opens correctly in VP14, VP18, and VP19 on this end. Best of luck!

MMiles wrote on 8/18/2021, 6:55 PM

Thanks Musicvid for checking it out on different versions. Hmm. Tried it myself on two different computers with same import issues, so I don't know what to think...unless I have to change something in the preferences. At this point, it's not worth the effort to keep fiddling. I'd love to purchase a VP17, but no 3rd party has it for a decent price. I waited too long I believe.

Hey thanks again for all the years of help you've brought to these forums.

Mike