One of the problems I have with it is that when pausing the video you can have problems when one image contains part of one frame and part of another.
This is especially noticeable at higher shutter speeds.
That should never
happen if following the procedure correctly. Even at high shutter speeds, the exposure of, say frame# 75 on each matched clip properly lined up quantized to frames will show a sliver of the frame, the rest black during the exposure. Both clips should show the same sliver of the frame but maybe at different locations in the frame #75. If you could sync the high shutter speed then the match would work.
Frank, I have not much experience shooting genlocked cameras at non-standard shutter speeds, like 1/1000 sec. While still photographers often select different shutter speeds to stop action, videographers rarely worry about this and stick to the standard 1/60. I fall in this category. Your requirements are not normal and as such may require special needs in editing such as a sync of shutter speeds. This has nothing to do with frame synchronization.
I do agree with you that I don't think the LANC Sony Protocol can sync lock shutter speed on a video camcorder. I believe it can on some still cameras, if I can trust the amateur blogs I have read as truth.
Wolfgang- If all you want to do is shoot wide stereobase video with the TD10's all you need to do is follow what I have successfully done for the past 9 months. Much of what you are doing, I believe, is exploring directions that don't make much sense in meeting minimum needs and is a waste of money such as buying many camcorders in the hopes that two will sync together. As I said, you can sync up both TD10 camcorders using the methods for pairing as outlined in the Sony Help section and when you follow this, you don't even need a Lanc Shepherd or other Lanc controller. All the controller does is make the operation easier and permit a pretty close zoom function that can be tweaked in the 3D stereo auto corrector. I shot quite a bit of 3D wide stereo base before even owning the Lanc Shepherd. Many stereographers have also done lots of work without the need to genlock the camcorders with Lanc controller.
With the Lanc Shepherd, I have learned that it is good for these functions-
1. turning on both camcorders together.
2. start recording both camcorders, close to the same time ( usually within 2-3 frames )
(1 & 2 are usually performed at fairly close to the same time)
3. Zoom is performed in very close sync as long as both camcorders are turned on with the zoom at full wide or full telephoto, against the stop, from the off position.
I was disappointed that the Lanc Shepherd does NOT perform synchronization of:
Exposure, white balance, focus, shutter speed. I don't think any of these is supported by Lanc for camcorders as it is not a supported LANC function per Sony. Also, Lanc does not truly genlock the slave camcorder's clock to the master. I know this for a fact as Sony's Lanc protocol only supports start stop of both recorders. Sony Lanc does support VITC ( vertical interval time code ) but the consumer camcorders do not. The Sony HVR Z1U LANC does support VITC and I designed and built a LANC time code converter to make the LANC time code compatible with LTC ( longitudinal time code) so that I could use the Z1U clock as the master time code generator for my broadcast cameras to lock onto in a genlock required shoot. I believe that the professional version of the TD10 DOES support LANC time code but we are not using these so it is not important. Besides, we can use the clap board method to sync the two as I described earlier. Time code is not required for 3D pairing.