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Compression issue w/ Microsoft DV AVI vs. Microsoft AVI
TV Commercial compression issue w/ Microsoft DV AVI vs. Microsoft AVI
Using Premiere Pro 1.5 I created a commercial for TV
When compressing 30 seconds of video to a Microsoft DV.AVI file the size is 111MB
When compressing 30 seconds of video to a Microsoft .AVI file the size is 900MBBoth videos look the same to me but I am not satisfied with how it looks on TV. I sent the station the Microsoft DV.AVI master on miniDV which looked good through my deck. Once the piece aired, I saw artifacts with some of the text and logos that were used and I do understand that this could just be inherent in the wimpy DV format or an issue with the transfer at the station, etc…. So to wrap it up, should an uncompressed Microsoft AVI file look better then the Microsoft DV.AVI file?
Thanks, Jim
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6 Replies
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Basic rule of thumb: Don’t convert from one one format to another unless there is no other way. Every conversion will cost quality.
Second rule of thumb: What was never in the original, cannot be added in post. Example an 8 bit stream captured, will NOT improve by using 10 bits. A 4:1:0 stream will NOT improve by using a 4:2:2 setting.
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One other thing is: What formats will the station accept? Also does the station trans-code themselves, that maybe where the artifacts could be coming from.
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In my experience, the only time you would want to export to DV, is if your original “DV” video was unaltered, where the only thing you did during edit was cuts. Any added graphic, color correction, transitions, etc. will require Premiere to recompress the frames where the video was affected.
Vince
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INHO, decompressing DV into uncompressed .avi wont hurt or help the original DV footage. However the frames with CG added should look better as uncompressed.avi
That said, if your graphics are not NTSC compatible (safe colors/fonts/line thickness) all bets are off. -
Most of the text animations were created in AE7 and exported as uncompressed AVI with the millions+ alpha channel setting. Once in Premiere, it seems they lose much of their quality when I render. Should I work the other way for a 30 second spot, should I bring my video/audio in to AE7 and export uncompressed from AE?
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They may lose some colors, but shouldn’t lose quality if you are exporting uncompressed.
Vince
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