Pixels On DVD

NewGuy · Post by **NewGuy** » Mon Jul 04, 2005 1:24 pm

I am using Video Studio #8. When I complete my DVD and play it I notice some pixel problems through out. It apperars mostly on the dark colors.
I have applied antiflicker and this still is a problem.
Does anyone know how I can fix this problem.

Thanks
M

THoff · Post by **THoff** » Mon Jul 04, 2005 5:15 pm

Can you explain the problem a bit better? Are these brightly colored pixels that flicker on and off (noise), or are you talking about other encoding artifacts such as macroblocks that are of the same or similar color? Are the same issues evident in the source video? How did you capture the source video? What are your DVD project settings?

NewGuy · Post by **NewGuy** » Mon Jul 04, 2005 6:36 pm

They are the macroblocks that are of the same or similar color.
They are evident on the source video, I captured via a capture device from my TV reciever through the capture device into my computer (USB2).
My settings were NTSC MPEG files 24 Bits, 720 x 480, 29.97 fps
Video data rate: Variable (Max. 4000 kbps) LPCM Audio, 48 KHz, Stereo.
Hope this is more info.
Thanks
M

THoff · Post by **THoff** » Mon Jul 04, 2005 7:11 pm

1. Don't capture directly to MPEG2 format unless your capture device does hardware encoding to that format. Capture to uncompressed AVI or use the lossless Huffyuv codec, and then encode to MPEG format separately.

2. Increase the bitrate. A bitrate of 4000Kbps is going to give you VHS quality at best, and in your case you have specified that as the maximum bitrate, and what really determines quality for VBR encoding is the average bitrate. CBR encoding is quicker and simpler -- use VBR only once you run into disk capacity problems, and then use two-pass encoding.

NewGuy · Post by **NewGuy** » Mon Jul 04, 2005 7:23 pm

So do I change the "video data rate " from constant to varaible and change the 4000 kbps to a higher setting?

Thanks
M

THoff · Post by **THoff** » Mon Jul 04, 2005 7:48 pm

I would use CBR with at least 6000Kbps for the bitrate. If you have no more than about one hour of video or so, just use 8000Kbps.

NewGuy · Post by **NewGuy** » Mon Jul 04, 2005 7:55 pm

How do I do " two-pass encoding"?

Thanks
M

THoff · Post by **THoff** » Mon Jul 04, 2005 8:16 pm

Two-pass encoding is only available when using variable bitrate (VBR) encoding. It's a checkable option when you create the MPEG2 file that is grayed out for CBR encoding.

NewGuy · Post by **NewGuy** » Mon Jul 04, 2005 8:35 pm

I have searched all over for "Two-pass encoding" where is this located?
M

THoff · Post by **THoff** » Mon Jul 04, 2005 9:50 pm

Check out page 179 of the manual.

sharanmini · Post by **sharanmini** » Tue Jul 05, 2005 10:22 pm

I am using VS8, While capturing I am capturing my MiniDV data in MPEG-II format and editing.

While editing I am adding pictures(.JPG) and adding TEXT in it.

I could see lack of clarity(I do not know how to call this, macroblocks???) in burned DVD vs Camcorder.

I see THoff suggesion to "Don't capture directly to MPEG2 format unless your capture device does hardware encoding to that format"

If I use codec "Huffyuv", Can I capture MPEG-II? is it better than VS8's codec? or is there any better wa to improve the clarity?

Thanks in advance.

-------- My Settings ----

MPEG-2 Video, Lower Field First
24 bits, 720 x 576, 4:3
29.97 fps
Variable Bit Rate (Max. 8000 bps)

MPEG Audio Layer 2
44,100 Hz, 16 bit, Stereo
224 kbps

THoff · Post by **THoff** » Tue Jul 05, 2005 10:58 pm

Huffyuv is only for AVI files. You would capture and edit using the AVI file format with the Huffyuv codec, and then use Share -> Create Video File to create an MPEG2 for your DVD project.

Huffyuv is a lossless codec, i.e. no image detail is lost as you capture your video. The vast majority of other codecs (including MPEG1, MPEG2 and MPEG4) compress the video by throwing away some detail. That's why it is advisable to convert to MPEG2 at the last stage of your DVD production (aside from the fact that high-quality MPEG2 encoding takes considerable time without specialized hardware).