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Software quality issues?
iMovie/QT file of it the quality wasn't too bad. But when it went thru iDVD to a DVD, the quality really dropped off. (Resolution was not great) Is this a software problem or ......? Would FinalCutPro put out a higher quality picture? (Original video was dig8 from Sony TRV 460 via Firewire to Mac G4 (Panther) and iMovie 4 to iDVD 5 on (Tiger)!) Thanks Lyndon "lyndon" <lynd***@easyjunktrapstreet.com> wrote in message I'm not a Mac user, but . . .news:lyndonr-332C9F.13115126062006@sn-ip.vsrv-sjc.supernews.net... > Having imported video into computer and creating an > iMovie/QT file of it the quality wasn't too bad. But > when it went thru iDVD to a DVD, the quality really > dropped off. (Resolution was not great) Is this a > software problem or ......? Would FinalCutPro put > out a higher quality picture? Producing a DVD requires transcoding DV-codec-encoded AVI to MPEG2, a lossy, temporally-compressed format. The transcoding process is critical to final video quality -- such things as bit precision, motion search, compression rate, matrix structure, number of analysis passes, variable versus constant bit rate compression, and other factors determine how good the final video will look. Most entry-level consumer products, like iDVD, compromise on transcode quality in the interest of speed of output. Final Cut Pro is, primarily, an editing program -- I don't whether it is intended for authoring DVDs from the timeline, or can simply produce a quick-and-dirty DVD for evaluation purposes (lots of comparable prosumer editing packages go the quick-and-dirty DVD route). You may wish to investigate stand-alone authoring and/or transcoding packages. However, it is clear that poor video on the DVD when compared to the edited AVI is the result of transcoding that has been optimized for speed rather than quality. For what it's worth, as a PC user, I edit in Adobe Premiere Pro, which is a prosumer editing program comparable to Final Cut Pro. I always use a standalone transcoder (tmpgenc) that allows me to optimize for quality and then import the resulting mpeg2 file into a separate authoring program (Adobe Encore). This allows me to produce DVDs that approach commercial DVDs in terms of video quality. Show quoteHide quote > > (Original video was dig8 from Sony TRV 460 via Firewire > to Mac G4 (Panther) and iMovie 4 to iDVD 5 on (Tiger)!) > > Thanks > Lyndon In article <4gav96F1ltlv***@individual.net>,
Show quoteHide quote "PTravel" <ptra***@ruyitang.com> wrote: Thanks for the response, but I found what seems to be the source > "lyndon" <lynd***@easyjunktrapstreet.com> wrote in message > news:lyndonr-332C9F.13115126062006@sn-ip.vsrv-sjc.supernews.net... > > Having imported video into computer and creating an > > iMovie/QT file of it the quality wasn't too bad. But > > when it went thru iDVD to a DVD, the quality really > > dropped off. (Resolution was not great) Is this a > > software problem or ......? Would FinalCutPro put > > out a higher quality picture? > Producing a DVD requires transcoding DV-codec-encoded AVI to MPEG2, a lossy, > temporally-compressed format. The transcoding process is critical to final > video quality -- such things as bit precision, motion search, compression > rate, matrix structure, number of analysis passes, variable versus constant > bit rate compression, and other factors determine how good the final video > will look. Most entry-level consumer products, like iDVD, compromise on > transcode quality in the interest of speed of output. Final Cut Pro is, > primarily, an editing program -- I don't whether it is intended for > authoring DVDs from the timeline, or can simply produce a quick-and-dirty > DVD for evaluation purposes (lots of comparable prosumer editing packages go > the quick-and-dirty DVD route). You may wish to investigate stand-alone > authoring and/or transcoding packages. However, it is clear that poor > video on the DVD when compared to the edited AVI is the result of > transcoding that has been optimized for speed rather than quality. of the problem. I had produced an mp4 with iMovie and sent that to iDVD which did have a real dropoff in picture quality. But going back to the original iMovie file and exporting directly to to iDVD resulted in a very markedly improved picture. In fact, it came out better than I thought it would before I even started the whole DVD creating process. Lyndon lyndon wrote:
Show quoteHide quote > In article <4gav96F1ltlv***@individual.net>, Well, sure. When you output to mp4 you are transcoding to a lossy> "PTravel" <ptra***@ruyitang.com> wrote: > > > "lyndon" <lynd***@easyjunktrapstreet.com> wrote in message > > news:lyndonr-332C9F.13115126062006@sn-ip.vsrv-sjc.supernews.net... > > > Having imported video into computer and creating an > > > iMovie/QT file of it the quality wasn't too bad. But > > > when it went thru iDVD to a DVD, the quality really > > > dropped off. (Resolution was not great) Is this a > > > software problem or ......? Would FinalCutPro put > > > out a higher quality picture? > > > Producing a DVD requires transcoding DV-codec-encoded AVI to MPEG2, a lossy, > > temporally-compressed format. The transcoding process is critical to final > > video quality -- such things as bit precision, motion search, compression > > rate, matrix structure, number of analysis passes, variable versus constant > > bit rate compression, and other factors determine how good the final video > > will look. Most entry-level consumer products, like iDVD, compromise on > > transcode quality in the interest of speed of output. Final Cut Pro is, > > primarily, an editing program -- I don't whether it is intended for > > authoring DVDs from the timeline, or can simply produce a quick-and-dirty > > DVD for evaluation purposes (lots of comparable prosumer editing packages go > > the quick-and-dirty DVD route). You may wish to investigate stand-alone > > authoring and/or transcoding packages. However, it is clear that poor > > video on the DVD when compared to the edited AVI is the result of > > transcoding that has been optimized for speed rather than quality. > > Thanks for the response, but I found what seems to be the source > of the problem. I had produced an mp4 with iMovie and sent that > to iDVD which did have a real dropoff in picture quality. But > going back to the original iMovie file and exporting directly to > to iDVD resulted in a very markedly improved picture. In fact, it > came out better than I thought it would before I even started the > whole DVD creating process. compressed format, i.e. you lose quality. When you input that to iDVD and burn a DVD, you are re-transcoding to mpeg2, another lossy compressed format, i.e. you lose quality. By introducing the extra, and unnecessary, transcode to mp4 you lose a significant amount of video quality. Show quoteHide quote > > Lyndon
Why *Lower* Optical Zoom on Higher-Priced Camcorders?
Dumbest Question of the Month (Yes/No Answer) If Your Camera Doesn't Have a USB Connection--? pal vs NTSC After effects and effect pallet. Video camera's picture turns red. Please Help! Problem with 35" Sony TV picture tube digital 8 players? current camcorders w/analog in? xferring vhs > pc for editiing? Jerky video playback problems good replacement digital 8 camcorder with analog in? |
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