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Vegas Pro 9 re encoding
Hello, I am having an issue with Sony Vegas Pro encoding mpeg2 videos to mpeg2 after only making a few subtle changes such as removing parts of the video at the start and end. I need to render mass amounts of video from mpeg2 to mpeg2 with changes like this. Is there a faster way to render it or are there settings that I can change to prevent re-encoding?
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7 Replies
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In your Options, Preferences, make sure “Eable no-recompress long-GOP rendering” is checked and see if that makes a difference. Any effects or changing the source file will make you render every frame. But if your just piecing parts from and to the same format mpeg, this should do the trick. Hope this helps, Danny Hays
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Thanks, I made sure that the enable no-recompress long GOP rendering box was checked and it was. If I split the source file or make any other changes it will need to re-encode the video, am I correct?
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If I split the source file or make any other changes it will need to re-encode the video, am I correct?
You are talking about two different things here. Splitting the source and editing out a section will not cause re-compression IF AND ONLY IF your output format is IDENTICAL to your MPEG source.
If, however, you make a change like add any FX, then the video will need to be recompressed.
The key here is not only do you have to enable no-recompress long GOP, you also have to render to the exact MPEG2 format that the original MPEG2 files are. Even if something as small as the bit-rate does not match, the entire video will be recompressed.
~jr
http://www.johnrofrano.com
http://www.vasst.com -
Okay thank you very much, that is what I thought that the source files and the rendering output would have to be identical. Is there a setting or option that will automatically adjust the encoding settings to match those of the source video? Or is it completely manual? Also would there be any difference between MPEG2 codecs? I know Vegas uses the Main Concept MPEG codecs…
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Is there a setting or option that will automatically adjust the encoding settings to match those of the source video? Or is it completely manual?
No, it’s completely manual which makes it impossible at times to match.
Also would there be any difference between MPEG2 codecs? I know Vegas uses the Main Concept MPEG codecs…
There shouldn’t be a difference. Vegas is looking at things like resolution, GOP, bit-rate, etc. that should be the same regardless of who’s MPEG2 codec you used.
~jr
http://www.johnrofrano.com
http://www.vasst.com -
If I just do some trimming and add chapter marks, do the chapter marks counts as Video FX and cause re-encoding?
Mike Yoneda
Mililani, HI -
[Mike Yoneda] “do the chapter marks counts as Video FX and cause re-encoding?”
No, chapter markers should not cause a re-encode. They are either stored as meta-data or kept in a separate file.
~jr
http://www.johnrofrano.com
http://www.vasst.com
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