HV20 really has 1920x1080 resolution?
I've got HV 20 , on the box is written 1920x1080 sensor, but when i capture in Vegas 7 i've got the resolution 1440x1080, what I've did wrong?
It's a setting that i can do to capture 1920x1080 video?
Is a Vegas 7 problem, should using other software will help?
Hi eusceptic! Welcome to the forum!Originally Posted by eusceptic
This has been discussed many times before. Here
The HV20 does record in 1920x1080 but only in PF24 Mode. And it's wrapped in a 60i stream which you then must do a "Pulldown" in post or while capturing using Cineform's capturing software. Discussion on removing Pulldown can be found Here
-Kyle
Oh boy! This is a big discussion, and I highly recommend that you read the HDMI threads, but I'll give you the short version.
First, let me tell you that the sensor is actually bigger than 1920x1080, which is 2 megapixels. It's actualy 3 megapixels for photographs, but it's masked off.
You are probably capturing through firewire off of your videotape. HD video is ALWAYS 1440 x 1080 with 4:2:0 colorspace and a 1.33 pixel ratio. The pixels are stretched to give the wider format.
That is the technical standard to fit the video stream within the data rate for the mini-DV tape. Every HD camera that records to mini-DV uses that format. You are not losing anything compared to any other camera.
The interesting thing is that the output from HDMI is 1920x1080 with 4:2:2 color space and square pixels. The HV20/HV30 is one of the few that has HDMI output.
There is much debate on whether the data stream is being intercepted before it's compressed (which is what it appears to be IMHO since there is more detail in the HDMI capture.) HDMI Comparison Thread.
HDMI is captured with an Intensity card by Black Magic Design. The biggest drawback of this is you need a computer running at the same time. That means indoors, or with an extension cord, or portable power. Portable Intensity Thread.
A big advantage is you get two videos at once. One on the computer and one on the video tape.
Look at the comparisons and decide for yourself.
Duke
Sorry Kyle. Not quite right. 24p is still 1440 with a 1.33 pixel if on tape or by firewire.
Duke
Ahh, so it's only 1920x1080 via HDMI without a tape?
Whether you capture from tape through HDMI or capture live through HDMI then it is 1920x1080.
As Duke said...1440x1080 always over firewire.
No one can read the Gospels without feeling the actual presence of Jesus. His personality pulsates in every word. No myth is filled with such life...Albert Einstein
OK I am new but from my understanding from reading here the HDV standard is 1440x1080 so I don't see how you could capture from tape through HDMI at 1920x1080 unless the camera is reconverting it back to 1920x1080. So to the OP you aren't doing anything wrong. 1440x1080 is what the HDV format standard is even though the CMOS is 1920x1080.
Exactly right. An even bigger problem is the 4:2:0 compression that's applied to store the signal to tape (which is why there's no advantage to ingesting a tape on HDMI vs. FireWire, whereas a live-capture over HDMI will be 4:2:2).
The orginal poster wasn't doing anything wrong. 1440 is normal and what you'll get out of every HDV camera. Once it's on videotape it's that format no matter what you capture it with.
However, if you can capture it before it's compressed for videotape by HDMI direct you can get more data. For TV, DVD, etc the HDV is great all by itself. Only in extreme situations is HDMI direct capture worth the hassel.
Duke
Correct, but if it's an HDMI capture from a tape the data was already lost by the compression to put it on the tape.
Tanks for all you responses.
HDMI capture is not a good idea for me, but know I know i haven't fool by Canon .
I have another question, 24p videos can be capture with Sony Vegas 7? Or just with cineform software?
I have to do an amateur documentary and i wanted to shoot in 24p.
You can capture video with Vegas 7, however it will be captured as 60i. Because there are no flags on the stream, Vegas can't recognize the 24p video embedded in 60i.
So, if you want to capture 24p direct from the camera, then yes, you will need CineForm. That will allow you to remove pulldown while capturing, resulting in 23.976 fps progressive files.
Or you can capture as 60i and remove pulldown before editing (many applications can do that). This has been discussed before.
Yes...of course I know ....was not talking about compression. Just saying everything from HDMI is outputted at 1920 x 1080. Whether it's upscaled from tape or output live...HDMI is 1920 x 1080....
No one can read the Gospels without feeling the actual presence of Jesus. His personality pulsates in every word. No myth is filled with such life...Albert Einstein
Since firewire is always 1440 and the new Canon HF10 using the AVCHD codec has a picture size of 1920x1080, I guessing you get 4:2:2 & da big picture without the HDMI hassle.
Not quite............you get the big picture 1920 x 1080 in 4:2:0. The AVCHD codec uses a YV12 colorspace, same as HDV and all Mpeg-2 for that matter. Oh, and you do get a BIG hassle dealing with it in post.............Since firewire is always 1440 and the new Canon HF10 using the AVCHD codec has a picture size of 1920x1080, I guessing you get 4:2:2 & da big picture without the HDMI hassle.
There is no such thing as "Idiot-Proof".........a good Idiot will get around that every time.
The HDMI output on the HV20 is 1920 x 1080 upscaled from 1440 x 1080. I was reluctant to admit this myself but finally became convinced after extensive testing.
-RHKFilm
I thought pixel size played a role somewhere. Do wide (1.333) pixels v/s square (1.0) ones have anything to do with the 1440 v/s 1920 issue?
Do you have your testing posted here?
I agree with you that HDMI from videotape is 1440 upscaled to 1920. However, if live capture HDMI was only upscaled 1440 I don't think it would show the increased details in the higher resolutions as shown in this thread as you go scroll down.
http://hv20.com/showthread.php?t=722...dmi+comparison
OR, maybe increased resolution is due to HDV compression.
For what ever reason around 1000 or 1100 there is more details captured on the HDMI live capture. For me, I don't really care why.
I think arguing over whether the extra definition of details is compression or direct capture is a red herring.
I just care about the practical effect that it does provide the extra details and HDMI live capture does give you 4:2:2 color, which is twice the color data.
Duke
The resolution of the video processed by the Canon HV20/30 is 1920 x 1080. If you capture live via HDMI, it will be the full 1920 x 1080...........
In order for the camera to store the footage onto tape, it must resize it to 1440 x 1080 with a 4:2:0 color space. That's HDV Standard specs. The only way it could keep the full 1920 x 1080 resolution, is if stored it as a file to a HDD or Flash Memory like the JVC and many AVCHD cameras do....................
There is no such thing as "Idiot-Proof".........a good Idiot will get around that every time.
What is the color space of AVCHD cameras?
The Color Space is YV12. The sampling bit depth is 4:2:0, it's the same for all HDV and all Mpeg-2 camcorders..............What is the color space of AVCHD cameras?
The Color Space for DV is YUY2 with bit depth of 4:1:1 for NTSC and 4:2:0 for PAL (I might be wrong for PAL)...............
There is no such thing as "Idiot-Proof".........a good Idiot will get around that every time.
Duke's side by side comparison is pretty convincing; I think the data must be routed out toHDMI further upstream. Unless there is some magic upsampling gizmo, but upsampling does not usually work so creatively.
You say that resolution from HV20 using HDMI is always 1920x1080.
Why is then in my case when connecting HV20 via HDMI to LCD HP w2207h only 576i??
Waiting for your answers!
Regards,
Jure
HDMI negotiates the best standard supported by the display device.
Maybe something had gone wrong in your case.
Cheers,
David.
Those are really odd numbers. Is one of the devices PAL? I'm not in PAL land, but my vague recollection is 576 is pal. Also 2207 divided by 3 (RGB) is 753, which also sounds like PAL standard definition.
Posting Permissions
Reply With Quote
