Minggu, 08 Desember 2013

How to make a live video feed with an HDMI Camcorder?

Q. How can you make a live video feed on an HDMI camcorder? People come with solutions, but they don't describe how they work or how to use it. I want to make animations, but with a poor quality video capture USB, the quality and video resolution is crap. I have a SONY HDR-CX190. If you do come up with a solution, please tell me how to use it.

A. Live feed to what? From the camcorder to a locally-connect (with a cable) computer?

Blackmagic Design has a couple of video converter boxes. Connect the camcorder's AV-out to the video converter box; the converter box connects to the computer.

The preferred method is to use a firewire connection because firewire is designed for streaming - USB is not (it is a bursty protocol). But your CX190 has no firewire connection - for consumer grade camcorders, this is normally the domain of miniDV tape based systems.

If you choose to do a high definition stream and want to send that out to the internet somewhere, we'd need to know a lot more about your computer, the local network connection (wired ethernet - 100baseT or gig bit ethernet) will be needed) and the internet service provider needs to be very robust. Video like this uses a TON of bandwidth and can easily bring a poorly designed (or congested) wifi network down.

Back to the camcorder to computer connection... Most low-end video editors cannot deal well with USB-based streaming (in high quality video - in this case, high definition video) becasue USB is not designed to carry this sort of high-bandwidth video. Most of the time, the camcorder's analog AV-out is used, then the analog video get digitized and shoved over USB. You have already discovered this. If we can't replace the camcorder then something else needs to happen. But you told us nothing about the computer.

Looking through the Blackmagic Design product list, you'll see cards with HDMI inputs that use an expansion slot inside the computer. These are not inexpensive... and the files will be huge - but the video quality will be there. There are other video converter products available from other manufacturers - but without knowing your budget, computer and operating system, it is impossible to make any specific recommendations - only general ones...


How can I get the slow motion effect from MXF 60p recorded by P2 HD Camcorder?
Q. I have some MXF video files shot with my P2 HD Camcorder. I am shooting at 60P, but I want to slow the footage 50 percent for editing. I assumed that if I selected the 30P setting that the footage would be slowed, but the converted shot is the same length as the original footage that was shot at 60P. How can I get the slow motion effect?

A. You did not tell us what you are editing with or where you "selected the 30P setting" to slow the video playback speed.

Don't convert anything until the video editor can deal with the video. Then use the video editor's controls to do what is needed.

+++++

I just answered your FCP question.

Once the video is in FCP, place the clip you want to slow into the timeline. Click once to select it. On the command line, under "Modify" select "Speed". Adjust as needed.





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