Video Pixelating - After Render only ...

Moderator: Ken Berry

Post Reply
WhiteMoose

Video Pixelating - After Render only ...

Post by WhiteMoose »

I can't figure out this quality stuff .. Points from a newbie ... Get Firewire cable instead of USB ... both work ... Larger resolution captured with Firewire ...

Question from Newbie - Why does the video jump (internally) more like big shifting pixelations on the screen ?

Only jumps if the camera is moving quickly side to side ... But is great at all times on tv before plugging into the computer ...

Any ideas how to get silky smooth playing video ?

thanks,

Joel@WhiteMoose.Ca
THoff

Post by THoff »

The two most likely causes are too low a bitrate, and if the problem is most pronounced during horizontal movement, probably the wrong field order.

Use lower-field first or frame based output and a bitrate of 7000Kbps with CBR encoding, and see if the problem disappears.
WhiteMoose

Only pixelating after burnt onto DVD ...

Post by WhiteMoose »

Checking out this video on my computer side by side with the TV , its only jumping on the DVD played on the TV ... the other pic on the comp is crystal clear ... I rendered / captured at 8000 as suggested in the sticky ... don't remeber CBR encoding ... Do remeber getting Lower first ...


Why would it pixelate after moving to DVD but be silky on the comp?

Joel
sjj1805
Posts: 14383
Joined: Wed Jan 26, 2005 7:20 am
operating_system: Windows XP Pro
System_Drive: C
32bit or 64bit: 32 Bit
motherboard: Equium P200-178
processor: Intel Pentium Dual-Core Processor T2080
ram: 2 GB
Video Card: Intel 945 Express
sound_card: Intel GMA 950
Hard_Drive_Capacity: 1160 GB
Location: Birmingham UK

Post by sjj1805 »

Have you tried more than one DVD?

If you have checked the Field Order as mentioned above but the picture is still not playing correctly on your TV, it may be your DVD player doesnt like the disk you created. Firstly check that your DVD player is designed to play DVD -r/+r -rw/+rw.

Then try burning at a lower speed. Even though you may have a 16x DVD burner and using appropriate disks, many DVD players are not happy with a disc burned at high speed. Burn again at 4x or lower, It seems the faster speed results in a weaker laser signal to the surface of the disc.
THoff

Post by THoff »

The PC display is not interlaced, whereas the TV is -- the DVD decoder on the PC does the deinterlacing for you.

Was the video you captured in DV AVI format (in this case it was lower-field first), or did you use the MPEG capture plugin? If you captured directly to MPEG2 (which I would not recommend), then you probably have upper-field first video.
WhiteMoose

Silky Smooth video achieved ...

Post by WhiteMoose »

Awesome.. just burned my first DVD that looked good on TV ... Changed the burn speed from 16X to 4X as recomended .... Also got a firewire cable rather than transferring by USB ...

I captured in MPEG 2 as recomended in the sticky .... I did manually change the field order to lower first (also as recomended in the sticky)... Why would you not use MPEG 2 to capture?

Is capture in DV rather than MPEG2 going to give me an even better quality video?

Joel
THoff

Post by THoff »

I personally don't recommend capturing directly to MPEG2 format.

The reason for this is that MPEG2 is not as suitable for editing as DV. If you have a MiniDV camcorder, capturing in DV format (really just a digital transfer) gets you an exact copy of the video as recorded by the camera, with no re-compression or conversion taking place.

Furthermore, DV uses intra-frame compression, whereas MPEG2 uses inter-frame compression -- with DV, each frame stands alone, whereas with MPEG2, the encoding on the current frame depends on the frames preceeding it. Any encoding and editing artifacts are carried forward.

Finally, if you are trying to fit a lengthy or complex video onto a single-layer DVD, you might benefit from two-pass VBR encoding. This is not an option if you capture directly to MPEG2, and doing so following the initial capture will result in further loss of fidelity.
Post Reply