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  1. Member
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    I'm shooting on a Sony Handycam that outputs MPG files for editing.
    I'm editing in Sony Vegas (latest version).

    My main timeline fades into a simple graphic. But after editing and rendering, the last second or two of video gets blown out when I play it back in a simple video player (VLC, Quicktime, Realplayer...all produce the same result). It's as if the video quality goes down significantly in those last frames.

    Could this be due to the video quality? The camera outputs in MPG, and it's a 4.0 megapixel camera. My rendering settings are at "Internet HD 720p." I've done this before (with other cameras) and had no problem.
    Any ideas?
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  2. aBigMeanie aedipuss's Avatar
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    use mediainfo on one of the mpg files and post the text results here. could be interlaced 480i.
    --
    "a lot of people are better dead" - prisoner KSC2-303
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    Thanks for that.

    Here's what I got for results:

    Code:
    General
    Complete name                            : C:\Videos\M2U00078.MPG
    Format                                   : MPEG-PS
    File size                                : 33.6 MiB
    Duration                                 : 53s 56ms
    Overall bit rate mode                    : Variable
    Overall bit rate                         : 5 311 Kbps
    
    Video
    ID                                       : 224 (0xE0)
    Format                                   : MPEG Video
    Format version                           : Version 2
    Format profile                           : Main@Main
    Format settings, BVOP                    : Yes
    Format settings, Matrix                  : Custom
    Format settings, GOP                     : M=3, N=15
    Duration                                 : 52s 986ms
    Bit rate mode                            : Variable
    Bit rate                                 : 4 758 Kbps
    Maximum bit rate                         : 9 100 Kbps
    Width                                    : 720 pixels
    Height                                   : 480 pixels
    Display aspect ratio                     : 16:9
    Frame rate                               : 29.970 fps
    Standard                                 : NTSC
    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)                       : 0.459
    Time code of first frame                 : 00:00:00:00
    Time code source                         : Group of pictures header
    Stream size                              : 30.1 MiB (89%)
    
    Audio
    ID                                       : 189 (0xBD)-128 (0x80)
    Format                                   : AC-3
    Format/Info                              : Audio Coding 3
    Mode extension                           : CM (complete main)
    Format settings, Endianness              : Big
    Muxing mode                              : DVD-Video
    Duration                                 : 53s 56ms
    Bit rate mode                            : Constant
    Bit rate                                 : 448 Kbps
    Channel(s)                               : 6 channels
    Channel positions                        : Front: L C R, Side: L R, LFE
    Sampling rate                            : 48.0 KHz
    Bit depth                                : 16 bits
    Compression mode                         : Lossy
    Delay relative to video                  : -120ms
    Stream size                              : 2.83 MiB (8%)
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  4. Try disabling GPU acceleration - it's been known to cause garbage frames during rendering in vegas for many people
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  5. Member
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    Thanks for that.
    I've turned it off and restarted (per program notifications), but that didn't do anything. (Or fix anything, I should say).
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  6. Can you clarify what is happening? Is it blowing out (to white) for a few frames ? or Post a screenshot or video sample to describe it better

    Does it look ok in the preview before exporting? What happens if you try another codec or export format ?
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  7. Member
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    That's just it - It looks fine in preview, but it's just the last few frames that pixelate making the image blurry after rendering. I've used these settings before with no problem. But I suspect the quality of the video I'm getting to edit is the problem. The camera is a 4.0 Pixel Sony Handycam - relatively old.

    What's even more odd is that I have the video fade into an image at the end, but the image comes out clean. It's just the last few frames of the video on the timeline.
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  8. Originally Posted by Masada View Post
    But I suspect the quality of the video I'm getting to edit is the problem. The camera is a 4.0 Pixel Sony Handycam - relatively old.
    If the source video was the problem, you would expect to see pixellation in the preview . Make sure you examine at 100% . If there is macroblocking in the source, you can use some deblocking filters before rendering

    To rule out compression issues during export, try bumping up the bitrate on your render settings. Also post the mediainfor report for that



    What's even more odd is that I have the video fade into an image at the end, but the image comes out clean. It's just the last few frames of the video on the timeline.
    When there are "weird" issues that have no explanation in vegas , usually the culprit is GPU acceleration , but you've already tried disabling
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  9. Member budwzr's Avatar
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    I got a red screen on one project, so I opened the same media in a different version of Vegas, and no problemo.

    So I made two screenshots as proof, and opened a ticket. A week later, after I didnt care anymore, they replied with a template response, directing me to update to the latest release. But I did have the latest release.

    So its hard to nail them down.
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  10. Member
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    Yeah, the GPU acceleration is definitely off, and I've tried numerous settings for rendering and they all produce the same results. Because of that, I just think it's the video quality that I started with.

    budwzr, I have no idea what you're saying.
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  11. He's saying he updated his software.

    Are you dissolving by crashing the clips together (overlapping the clips on the same track) or have you added an effect? Whichever you did, try the other.
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  12. Because of that, I just think it's the video quality that I started with.
    It can't be the video quality you started with, if you don't see it in the preview (looking at it 1:1 or 100% zoom, because a reduced preview will hide artifacts)
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  13. Member budwzr's Avatar
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    You dont have the preview set to best/full? No wonder!
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