I used my sony hcr96 dv camcorder to record an indoor scene in a room with a southern exposure. I set up my tripod with the window to my back but i guess i didn't realize how intense the sun was because when i viewed the captured footage on the tv, the whites (the wallpaper, the baby, the couch) were all extremely white & bright, actually they seemed to be saturated. My wife said that the baby looked like a snowman. I checked the original & it while it was bright, it wasn't saturated, showing some detail. i use dv type 1.
Why is the captured footage brighter?
captured video is brighter than original
Moderator: Ken Berry
I don't understand these two set-ups... I assume you checked the "original footage" by hooking the camera directly to the TV? How did you view the "captured footage" on the TV?when i viewed the captured footage on the tv, the whites... were all extremely white & bright, actually they seemed to be saturated... I checked the original & it while it was bright, it wasn't saturated, showing some detail.
This is a MiniDV camera? When you "capture" MiniDV to AVI/DV, the picture-data isn't altered at all, it's just re-packaged into an AVI file. Of course, when you make a DVD, it has to be converted to MPEG-2. (This is true with most digital video cameras... It's more of a "data-transfer" than a "capture".)sony hcr96 dv camcorder... Why is the captured footage brighter?
Colors on a VGA/SVGA computer monitor are generated differently than on an NTSC/PAL TV/Monitor. If you haven't made a DVD yet, you might want to make a short "sample" DVD to see if the problem goes-away when the DVD is played on a regular TV. (In any case, you probably will want to reduce the brightness with Video Studio.)
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Hi DVDoug
Thanks for replying.
I have a correction to make. The file saved to dvd is the 1 with the increased brightness problem. The capture process seems to be ok because the captured avi file looks exactely like the original tape which i played using "share" i.e.: using the play, ff & rewind virtual controls in vs11. I've played the dvd through 2 tv's (none digital) & each appears very washed out where the sun was brightest. Note however, the avi file is too bright too, but not "maxed out" like the dvd. This confirms everything you said about tv vs video monitors & converting to mpeg. FYI: I tried to reduce the brightness with vs11 brightness controls but it doesn't help, the brightest areas still look very bright on the avi file. I realize now that the sun shining through the window into the room caused very high contrast with the darker, not so illuminated areas. I should have turned down the exposure on the camera.
BTW: i haven't played the tape directly from the camera to the TV using a cable or even to a digital TV. I'll do that next.
Is there anything i can do to improve the dvd, short of adjusting the brt/contrast controls?
ron
Thanks for replying.
I have a correction to make. The file saved to dvd is the 1 with the increased brightness problem. The capture process seems to be ok because the captured avi file looks exactely like the original tape which i played using "share" i.e.: using the play, ff & rewind virtual controls in vs11. I've played the dvd through 2 tv's (none digital) & each appears very washed out where the sun was brightest. Note however, the avi file is too bright too, but not "maxed out" like the dvd. This confirms everything you said about tv vs video monitors & converting to mpeg. FYI: I tried to reduce the brightness with vs11 brightness controls but it doesn't help, the brightest areas still look very bright on the avi file. I realize now that the sun shining through the window into the room caused very high contrast with the darker, not so illuminated areas. I should have turned down the exposure on the camera.
BTW: i haven't played the tape directly from the camera to the TV using a cable or even to a digital TV. I'll do that next.
Is there anything i can do to improve the dvd, short of adjusting the brt/contrast controls?
ron
I second what Doug said that "capturing" cannot change anything.
However, you have to understand also "luma" and "chroma". NTSC DV, unlike PAL, has the colour signal attached to every fourth pixel on each line: this is called a colour space of 4:1:1. On a DVD, it is converted to 4:2:0 (almost the same as PAL DV), meaning the colours are attached to every other pixel along alternate lines. This difference implies a conversion and, as this is not perfect and the colour (chroma) compression algorithms differ, it can mean that you lose some colour detail, while the brilliance (luma) is unaltered.
The video luma signal in DV is 16-bits (I think) deep, which is a greater range than most TVs can usually show, therefore what you see is an approximation. I have a feeling that the range is lower in MPEG-2 (I haven't checked this in my lit, so I may be wrong). The figures are not important because the point is that there is detail in both highlights and shadows that are in the DV stream that you do not see on a TV (or on a 'puter monitor). By gently reducing the contrast and juggling with the brilliance (by small amounts), you can often bring out these details, but don't be heavy-handed; a little goes a long way. I think there may be filter to tweak the chroma up a little, as well. Click on "Color correction" and push the saturation slider a tiny wee bittie to the right (again, a little goes a long way).
However, you have to understand also "luma" and "chroma". NTSC DV, unlike PAL, has the colour signal attached to every fourth pixel on each line: this is called a colour space of 4:1:1. On a DVD, it is converted to 4:2:0 (almost the same as PAL DV), meaning the colours are attached to every other pixel along alternate lines. This difference implies a conversion and, as this is not perfect and the colour (chroma) compression algorithms differ, it can mean that you lose some colour detail, while the brilliance (luma) is unaltered.
The video luma signal in DV is 16-bits (I think) deep, which is a greater range than most TVs can usually show, therefore what you see is an approximation. I have a feeling that the range is lower in MPEG-2 (I haven't checked this in my lit, so I may be wrong). The figures are not important because the point is that there is detail in both highlights and shadows that are in the DV stream that you do not see on a TV (or on a 'puter monitor). By gently reducing the contrast and juggling with the brilliance (by small amounts), you can often bring out these details, but don't be heavy-handed; a little goes a long way. I think there may be filter to tweak the chroma up a little, as well. Click on "Color correction" and push the saturation slider a tiny wee bittie to the right (again, a little goes a long way).
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