Well, my music needs to start at 1:03:480, so my video has to start at the same time.
 

• I already have VideoEngine flag set to 0 in your AUD.INI file (so I'm using DirectShow): 

[Video]
VideoEngine=0

• I already installed K-Lite Codec Pack

But when play, Sonar becomes unstable, slow and the MP4 video doesn't appear.
Or rather, it appears but several seconds after I stop.
So, a mess.
 
I tested it with several other formats and apparently the only format that works with start time is AVI. But in this case, a video of 107 Mb in MP4 becomes 2.7 Gb in AVI ...
Does anyone have any solution for this?

Use video editing software for ANY changes to video, including start time.

SONAR is not a video editor, it does audio for video. Note there are AVI formats that can take up less space (e.g., screen captures done with the TechSmith codec) but I don't know how well they get along with SONAR.
 
For video editing I highly recommend Sony Vegas. Even the lite versions are extremely capable, and due to its origins as a hard disk recorder designed to compete with Pro Tools, the interface is very comfortable for those used to DAWs. Also, it follows Windows conventions closely, so it works a lot like SONAR. It's a great program.

Thanks but I did not say anywhere I wanted to edit a video.
What I'm understanding about your answers is that this is a known bug and the only solution is to edit the video adding a space ahead?
This is at least absurd.
Best would then removing from Sonar the option to change video start time, once and for all.

I work with video in Sonar everyday (for 23 years now).  I never bother with files and codecs. I load the video from my client into Vegas, put a :10 start up time, whether I have to add time ....or delete to start later... I always have a :10 second roll-up.  I Create an AVI file...then go to work. I match my picture TimeCode in Sonar by imputing an Off-set in the Clock section of Preferences.
 
Saves me tons of time 'cause I don't fight the video issues.  Sonar runs smooth, handles VSTs and mixing better than any DAW.
 
Not worth fighting the Video Codec thinggy.
 
Good luck! 

rogeriodec
Thanks but I did not say anywhere I wanted to edit a video.
What I'm understanding about your answers is that this is a known bug and the only solution is to edit the video adding a space ahead?
This is at least absurd.

 
 
With MP4, you would indeed need to add your desired offset to the video's beginning. Note that Apple has still not released a 64-bit version of QuickTime for Windows (the most recent version for Windows is from October 2014, and installs in the x86 program folder). 

Best would then removing from Sonar the option to change video start time, once and for all.

Why? It works perfectly well with AVI and WMV files. It seems unfair to deny those who create AVI and WMV files the ability to move start times just because you can't do it with MP4 files.
 
Unfortunately I get the feeling that if Apple was going to release a 64-bit version of QuickTime for Windows, they would have done so already. I'm not holding my breath.
 
There are other issues as well with QuickTime files. The following is from SONAR's help file:
 
QuickTime issues
 
In order to import/export QuickTime files in SONAR, you must install both the filters AND QuickTime. The following are some other known QuickTime issues:
 
*  It is presently only possible to export QuickTime videos on a 32-bit system. This is a limitation of QuickTime, not SONAR.
 
*  QuickTime Import/Export requires version 6.5.1 or higher of the QuickTime Player to be installed. The QuickTime Player is not included with SONAR, but can be downloaded separately from Apple's web site (www.apple.com/quicktime/download/win.html).
 
*  Audio mixdown to QuickTime must be set to 16 bits stereo or mono, or the resulting export will create an unusable file or abort with an error.
 
*  Audio mixdown to QuickTime must be set to 48 KHz or less or the resulting export will create a file that plays back incorrectly.
 
*  When exporting to QuickTime, the frame rate of the QuickTime video compressor will default to “best possible”. Since not all movies in a SONAR video project correctly report their frame rate, the best practice is manually enter the desired frame rate. This is done in the video settings of the QuickTime video compressor.
 
*  Exports to QuickTime from a SONAR video project created from an AVI using the Indeo video compressor will create a movie with white frames.
 
*  Exports to QuickTime may have an extra white frame on the last frame of the movie. This extra frame can be removed with the QuickTime Pro Player or another QuickTime editing application. 
 
 

FWIW Logic Pro X works only with QuickTime movies, to use anything else you need a converter. A converter might be your best solution for Windows as well.

Thanks, 
 
I found a way to allow the use of Anacrusis, keeping the video in 0:00:00, essentially creating the first bar with a beat and tempo containing all the notes of Anacrusis as if they were a full bar.
For example, if my original music is 4/4 at 100 BPM and I have three sixteenth notes in the first bar, I create the first measure as 3/8 at 200 BPM and the second bar I switch to 4/4 100 BPM.
This solves the problem not only from the difficulty of Sonar dealing with Start Time other than 0, but also avoids the confusion of changing all unique markings video time, if I slide it.
 
But still, I wonder if you could show me a link that teaches how to integrate Sonar to Vegas?

rogeriodec
But still, I wonder if you could show me a link that teaches how to integrate Sonar to Vegas?

It's not linked in the sense of ReWire or something like that. I just get the video exactly as desired in Vegas, bring it into SONAR, then compose music to it. Vegas has a timeline that accommodates bars and beats, so you can easily make the length relate to musical values for when you bring it into SONAR.
 
With narration for instructional videos, I record the narration in SONAR, then bring the audio into Vegas and cut the video to it.
 
The reason for using both is Vegas does video infinitely better than SONAR, and SONAR does audio infinitely better than Vegas. When you use both for their intended tasks, the end result rocks. I often have SONAR, Vegas, and Hypercam all open at the same time and working together in Windows.

Sorry, but what does MP4 have to do with Quicktime? As far as I know they're unrelated. Apple Quicktime's proprietary format is .MOV, I thought. I've certainly been able to play MP4 files without Quicktime on my system. Can't say the same for .MOV files.

I wish Sonar would handle this simple feature better too. I'm all for practical solutions but buying video software just to create a good initial starting point is ridiculous. I get that Sonar is not a video editor but it does advertise being able to PLAY video for the purpose of scoring and this is a pretty fundamental issue, as evidenced by virtually everyone using VEGAS to do it. I'm not a programmer but I don't even see what start time has to do with whichever codec is in use. If I want it delayed by ten seconds, Sonar just needs to start playing it after ten seconds.