Audio issues after editing the original capture

[VladBusca]

Hello.

I use an old card and software to digitize vhs tapes - Winfast PVR 2000. Which is still quite ok I guess, by means that the mpg files are correct and qualitative (as qualitative as vhs rip can be).

However, when I try to improve a bit the original mpg capture in Sony Vegas 14, the resulting m2t file has the audio out of sync (the beginning is ok but gets worse until the end).
Here are the orginal file and the improved file properties:

[Attachment 44367 - Click to enlarge]

Also here are the video files:

original vhs capture (mpeg):
https://www.youtube.com/watch?v=6XRwYXy98zg

enhanced file with audio issue:
https://www.youtube.com/watch?v=7B2thociVUk

Is there anything I can do to avoid this?

Many thanks!

Vlad

[Bernix]

Hi,
better is post Text format of mediainfo of source and "improved" file. But it is obvious, that improved is 4secs shorter. Probably something with VFR?
Don't know if Vegas has such feature, that's why mediainfo report is much better.

Bernix

[VladBusca]

Hi,
better is post Text format of mediainfo of source and "improved" file. But it is obvious, that improved is 4secs shorter. Probably something with VFR?
Don't know if Vegas has such feature, that's why mediainfo report is much better.

Bernix

Here they are

[Attachment 44368 - Click to enlarge]

[Attachment 44369 - Click to enlarge]

Ignore those 4 seconds, when improving I deleted unwanted vhs content from the beginning and the end.

Thanks

[Bernix]

Unfortunately this is not text form... In view choose Text, it is important, this view isn't much informative.

Bernix

[VladBusca]

Hi,
better is post Text format of mediainfo of source and "improved" file. But it is obvious, that improved is 4secs shorter. Probably something with VFR?
Don't know if Vegas has such feature, that's why mediainfo report is much better.

Bernix

Sorry, never used mediainfo. Here are the text formats:

ORIGINAL:
General
Complete name : E:\Temp\WinFast WorkArea\Video_0106-1154(CVBS)_Celelalte Cuvinte Rock 95.mpg
Format : MPEG-PS
File size : 947 MiB
Duration : 20 min 48 s
Overall bit rate mode : Variable
Overall bit rate : 6 364 kb/s
Writing library : ArcSoft MPEG-2 PAL

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
Duration : 20 min 48 s
Bit rate mode : Variable
Bit rate : 6 014 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) : 0.580
Time code of first frame : 00:00:00:00
Time code source : Group of pictures header
GOP, Open/Closed : Open
Stream size : 895 MiB (94%)
Writing library : ArcSoft MPEG-2 PAL
Color primaries : BT.601 PAL
Transfer characteristics : BT.470 System B, BT.470 System G
Matrix coefficients : BT.470 System B, BT.470 System G

Audio
ID : 192 (0xC0)
Format : MPEG Audio
Format version : Version 1
Format profile : Layer 2
Duration : 20 min 47 s
Bit rate mode : Constant
Bit rate : 224 kb/s
Channel(s) : 2 channels
Sampling rate : 48.0 kHz
Frame rate : 41.667 FPS (1152 SPF)
Compression mode : Lossy
Delay relative to video : 455 ms
Stream size : 33.3 MiB (4%)

IMPROVED:
General
ID : 1 (0x1)
Complete name : E:\Temp\WinFast WorkArea\Video_0106-1154(CVBS)_Celelalte Cuvinte Rock 95.m2t
Format : MPEG-TS
Commercial name : HDV 720p
File size : 2.79 GiB
Duration : 20 min 44 s
Overall bit rate mode : Constant
Overall bit rate : 19.3 Mb/s
Maximum Overall bit rate : 19.7 Mb/s

Video
ID : 4096 (0x1000)
Menu ID : 1 (0x1)
Format : MPEG Video
Commercial name : HDV 720p
Format version : Version 2
Format profile : Main@High 1440
Format settings : BVOP
Format settings, BVOP : Yes
Format settings, Matrix : Default
Format settings, GOP : Variable
Codec ID : 2
Duration : 20 min 44 s
Bit rate mode : Constant
Bit rate : 17.9 Mb/s
Maximum bit rate : 18.3 Mb/s
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate : 25.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.778
Time code of first frame : 00:00:00:00
Time code source : Group of pictures header
GOP, Open/Closed : Closed
Stream size : 2.60 GiB (93%)

Audio
ID : 4098 (0x1002)
Menu ID : 1 (0x1)
Format : MPEG Audio
Format version : Version 1
Format profile : Layer 2
Codec ID : 3
Duration : 20 min 44 s
Bit rate mode : Constant
Bit rate : 384 kb/s
Channel(s) : 2 channels
Sampling rate : 48.0 kHz
Frame rate : 41.667 FPS (1152 SPF)
Compression mode : Lossy
Stream size : 57.0 MiB (2%)

Menu
ID : 110 (0x6E)
Menu ID : 1 (0x1)
List : 4098 (0x1002) (MPEG Audio) / 4096 (0x1000) (MPEG Video)
Maximum bit rate : 19850000

[Bernix]

Since original video is in sync, I don't know why exported video is out of sync. It is usually when you capture video, there are some frames skipped, but your video source is o.k. I haven't a Vegas, so don't know how it handle audio. But probably during rendering some frames was skipped for me for unknown reason. If I get it right video is before audio at the end, it means there are less videoframes frames... But probably I made fool from myself...
Sorry probably some Vegas users helps you.

Bernix

[VladBusca]

Since original video is in sync, I don't know why exported video is out of sync. It is usually when you capture video, there are some frames skipped, but your video source is o.k. I haven't a Vegas, so don't know how it handle audio. But probably during rendering some frames was skipped for me for unknown reason. If I get it right video is before audio at the end, it means there are less videoframes frames... But probably I made fool from myself...
Sorry probably some Vegas users helps you.

Bernix

Thanks, Bernix! Yes, Vegas could be the issue, because it seems that the video is out of sync even immediately after importing it in Vegas, when previewing it.