Sound quality when burning an iMovie to disc

I just got iLife 9 and made a video using iMovie. The picture and sound quality on my computer are excellent; but when I burned the movie to a disc using iDVD the pictures remained high quality but the sound was poor. Any idea what might have caused the problem and what I can do to get better sound quality? Any help would be much appreciated.

Problem found !
Karls answer's helped me to findout the issue.
Nevertheless, this wasn't the bug.
When playing the movie in iMovie HD, sound rendering is not correct. When you burn your DVD, sound track is calculated to mix every sound tracks according to each sound volume curve defined in iMovie.
If you see a dot at the beginning of a sound track this mean that the DVD sound rendering will be incorrect.
Clean the and make sure that, when you select a sound object, you can change its volume by adjusting it, not manually, but using the general volume cursor. If not, you have a problem. Remake a perfect flat volume curve before adjusting it again.

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Sound Issue when burning an imovie HD projet with iDVD

I've just finished a 45 minutes movie with a rich sound track, using the video recorded sound, mixed with music & garage band loops and effects.
In Imovie, I've used a variable sound level adjustment to have a good sound mix. When playing with iMovie, everything is fine.
When burning my DVD, the volume levels in the soundtrack are incorrect with big sound variations each time i've used a mix of 2 sound effect, one with a decreasing volume, the other one with increasing sound volume at the same time for example.
Is there any known bug issue regarding this ?
Imac G4 Mac OS X (10.3.9)
Imac G4 Mac OS X (10.3.9)

Problem found !
Karls answer's helped me to findout the issue.
Nevertheless, this wasn't the bug.
When playing the movie in iMovie HD, sound rendering is not correct. When you burn your DVD, sound track is calculated to mix every sound tracks according to each sound volume curve defined in iMovie.
If you see a dot at the beginning of a sound track this mean that the DVD sound rendering will be incorrect.
Clean the and make sure that, when you select a sound object, you can change its volume by adjusting it, not manually, but using the general volume cursor. If not, you have a problem. Remake a perfect flat volume curve before adjusting it again.

Does anyone experienced bad quality when burning a DVD?

Does anyone experienced bad quality when burning a DVD?
Using OS 10.6.8 and Magiv Video in iDVD, I am having a hard time creating a decent DVD. The videos per se are fine, but the intro menu and menu text and images are extremely poor quality and hard to read. What is going on?

Hi my notes on this - might be of help
DVD quality
1. iDVD 08, 09 & 11 has three levels of qualities. (version 7.0.1, 7,0.4 & 7.1.1)
iDVD 6 has the two last ones
• Professional Quality
(movies + menus up to 120 min.) - BEST (but not always for short movies e.g. up to 45 minutes in total)
• Best Performances
(movies + menus less than 60 min.) - High quality on final DVD (Can be best for short movies)
• High Quality (in iDVD08 or 09) / Best Quality (in iDVD6)
(movies + menus up to 120 min.) - slightly lower quality than above
About double on DL DVDs.
2. Video from
• FCE/P - Export out as full quality QuickTime.mov (not self-containing, no conversion)
• iMovie x-6 - Don't use ”Share/Export to iDVD” = destructive even to movie project and especially so
when the movie includes photos and the Ken Burns effect NOT is used. Instead just drop or import the iMovie movie project icon (with a Star on it) into iDVD theme window.
• iMovie’08 or 09 or 11 are not meant to go to iDVD. Go via Media Browser and as Large (NOT HD or other resolutiona as result will suffer) or rather use iMovie HD 6 from start.
3. I use Roxio Toast™ to make an as slow burn as possibly e.g. x4 or x1 (in iDVD’08 or 09 this can also be set)
This can also be done with Apple’s Disk Utilities application when burning from a DiskImage.
4. There has to be about or more than 25Gb free space on internal (start-up) hard disk. iDVD can't
use an external one as scratch disk (if it is not start-up disc). For SD-Video - if HD-material is used I guess that 4 to 5 times more would do.
5. I use Verbatim ( also recommended by many - Taiyo Yuden DVDs - I can’t get hold of it to test )
6. I use DVD-R (no +R or +/-RW) - DVD-R play’s on more and older DVD-Players
7. Keep NTSC to NTSC - or - PAL to PAL when going from iMovie to iDVD
(I use JES_Deinterlacer to keep frame per sec. same from editing to the Video-DVD result.)
8. Don’t burn more than three DVDs at a time - but let the laser cool off for a while before next batch.
iDVD quality also depends on.
• DVD is a standard in it self. It is Standard Definition Quality = Same as on old CRT-TV sets and can not
deliver anything better that this.
HD-DVD was a short-lived standard and it was only a few Toshiba DVD-players that could playback.
These DVDs could be made in DVD-Studio Pro. But they don’t playback on any other standard DVD-Player.
Blu-Ray / BD can be coded onto DVDs but limited in time to - about 20-30 minutes and then need
_ Roxio Toast™ 10 Pro incl. BD-component
_ BD disks and burner if full length movies are to be stored
_ BD-Player or PlayStation3 - to be able to playback
The BD-encoded DVDs can be play-backed IF Mac also have Roxio DVD-player tool. Not on any standard Mac or DVD-player
Full BD-disks needs a BD-player (in Mac) as they need blue-laser to be read. No red-laser can do this.
• HOW much free space is there on Your internal (start-up) hard disk. Go for approx. 25Gb.
less than 5Gb and Your result will most probably not play.
• How it was recorded - Tripod vs Handheld Camera. A stable picture will give a much higher quality
• Audio is most often more critical than picture. Bad audio and with dropouts usually results in a non-viewed movie.
• Use of Video-editor. iMovie’08 or 09 or 11 are not the tools for DVD-production. They discard every second line resulting in a close to VHS-tape quality.
iMovie 1 to HD6 and FinalCut any version delivers same quality as Camera record in = 100% to iDVD
• What kind of movie project You drop into it. MPEG4 seems to be a bad choice.
other strange formats are .avi, .wmv, .flash etc. Convert to streamingDV first
Also audio formats matters. I use only .aiff or from miniDV tape Camera 16-bit
strange formats often problematic are .avi, .wmv, audio from iTunes, .mp3 etc
Convert to .aiff first and use this in movie project
• What kind of standard - NTSC movie and NTSC DVD or PAL to PAL - no mix.
(If You need to change to do a NTSC DVD from PAL material let JES_Deinterlacer_3.2.2 do the conversion)
(Dropping a PAL movie into a NTSC iDVD project
(US) NTSC DVDs most often are playable in EU
(EU) PAL DVDs most often needs to be converted to play in US
UNLESS. They are play-backed by a Mac - then You need not to care
• What kind of DVDs You are using. I use Verbatim DVD-R (this brand AND no +R or +/-RW)
• How You encode and burn it. Two settings prior iDVD’08 or 09
Pro Quality (only in iDVD 08 & 09)
Best / High Quality (not always - most often not)
Best / High Performances (most often my choice before Pro Quality)
1. go to iDVD pref. menu and select tab far right and set burn speed to x1 (less errors = plays better) - only in iDVD 08 & 09
(x4 by some and may be even better)
2. Project info. Select Professional Encoding - only in iDVD 08 & 09.
Region codes.
iDVD - only burn Region = 0 - meaning - DVDs are playable everywhere
DVD Studio pro can set Region codes.
1 = US
2 = EU
unclemano wrote
What it turned out to be was the "quality" settings in iDVD. The total clip time was NOT over 2 hours or 4.7GB, yet iDVD created massive visual artifacts on the "professional quality" setting.
I switched the settings to "high quality" which solved the problem. According iDVD help, "high quality" determines the best bit rate for the clips you have.
I have NEVER seen iDVD do this before, especially when I was under the 2 hour and 4.7GB limits.
For anyone else, there seem to be 2 places in iDVD to set quality settings, the first is under "preferences" and the second under "project info." They do NOT seem to be linked (i.e. if you change one, the other is NOT changed). take care, Mario
TO GET IT TO WORK SLIGHTLY FASTER
• Minimum of 25Gb free space on Start-Up hard disk
• No other programs running in BackGround e.g. Energy-Saver
• Don’t let HD spin down or be turned off (in Energy-Save)
• Move hard disks that are not to be used to Trash - To be disconnected/turned off
• Goto Spotlight and set the rest of them under Integrity (not to be scanned)
• Set screen-saver to a folder without any photo - then make an active corner (up right for me) and set
pointer to this - turns on screen saver - to show that it has nothing to show
Yours Bengt W

IPhoto Slideshows: major loss of quality when passed to iMovie or iDVD

Problem: Slideshows created in iPhoto and exported to a Quicktime movie lose quality when exported from iMovie or iDVD.
I've read through many threads in both the iMovie and iDVD forums, and I've done a lot of testing to find the source of my frustration. Now I want to spell out my findings and see how they compare with what others know of this process. I'm posting the thread in this forum because iPhoto seems to be the common denominator.
I create slideshows in iPhoto, adding Ken Burns effects to each photo individually. I then export the slideshow as a Large (640x480) movie. The resulting movie looks good when played in Quicktime.
I import the Quicktime movie into iMovie, add some music and themes and then export it. No matter how I export it, the quality greatly suffers.
I try bypassing iMovie and import the iPhoto-created movie directly to iDVD. I burn the project and the quality of the video suffers.
As a final test, I create a similar slideshow in Photo to Movie, using pan and zoom effects and music, just like the iMovie project. I export the slideshow to a Quicktime movie and it looks great. I send that movie to iDVD and burn the project -- the quality is much better.
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However, I have created some slideshows prior and didn't run into any quality issues. I used the Share - Send to iDVD, but that shouldn't change anything.
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Sound quality when burning an iMovie to disc

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