Go Back    Forum > Digital Video > Video Project Help > Restore, Filter, Improve Quality

Reply
 
LinkBack Thread Tools
  #1  
01-23-2014, 11:08 AM
VideoFanatic VideoFanatic is offline
Free Member
 
Join Date: Jan 2014
Posts: 1
Thanked 0 Times in 0 Posts
SD Channel clip is HERE.
HD Channel clip is HERE.

The identical clips recorded are from a race which was originally broadcast in Standard Definition from 2007. However I noticed that the Sky F1 HD channel repeats old races and upscales them. So I recorded the same race from the SD and HD channel to compare them.

You can see that the picture quality is better in the HD sample because that channel uses a high bitrate. However you get horrible jaggy lines on the chalk lines that you don't get in the SD channel compressed sample.

For the best picture quality via Avisynth, in future should I just record the SD or HD channel?

If it's the HD channel then do you have any Avisynth script suggestions that would fix the jaggies on the HD sample?

Please keep in mind that for HD video sources (SD is fine), I can't run Avisynth MultiThreaded as the encodings crash.

Also I was wondering how the "One-on-one attention and advice from our specialists" works if I was to become a Premium member as video restoration is my hobby and I need help with Avisynth occasionally. Is there a forum section for that?
Reply With Quote
Someday, 12:01 PM
admin's Avatar
Ads / Sponsors
 
Join Date: ∞
Posts: 42
Thanks: ∞
Thanked 42 Times in 42 Posts
  #2  
01-23-2014, 11:02 PM
lordsmurf's Avatar
lordsmurf lordsmurf is online now
Site Staff | Video
 
Join Date: Dec 2002
Posts: 13,506
Thanked 2,449 Times in 2,081 Posts
More and more, broadcasters are hiring idiots. I just do not understand it. In the 90s and early 200s, such things would have never happened. Something like that was honestly a fire-able offense, and you'd be working at the local cable co, not a major network. Not even a local network!

But now? It happens daily on at least 2-3 channels. At any given time, you can find fubar aspect ratios, interlace errors, or audio errors (lipsync, distorted levels, etc). It's ghastly. When I see junk encodes like that, I just turn the channel. I'm not insulting my eyes with crap.

I just do not understand it. You'd half to be deaf or blind to miss those things. Helen Keller could have done better!

By the time you fix the jaggies, you'll toss out a lot of detail and resolution to achieve it. (This is the same method I use to restore drop-field deinterlaced video from VCDs/etc.) Just record the SD, and file a compliant with the network about the crap HD feed. Maybe they'll fix. (Some do, some do not.)

On the Avisynth, well, let me put it this way...
Right now, ask in the restoration forum. In February, something special will happen. Afterwards...

I use it all the time. Heck, right now my main capture desktop has 4 minutes left until one of my Avisynth passes is done. Funny enough, I was looking again to see if a sharper-than-QTGMC deinterlace filter existed yet, as I think it blurs too much even when tweaked. Or some better tweaks, or even filter mods. I saw you posted about this same thing back in 2012 on VH. Small world!

Yes, we help Premium Members faster, first, and with more details. Unless a free member asks something interesting, that is.

- Did my advice help you? Then become a Premium Member and support this site.
- For sale in the marketplace: TBCs, workflows, capture cards, VCRs
Reply With Quote
Reply




Tags
anti-aliasing, avisynth, upscaled

Similar Threads
Thread Thread Starter Forum Replies Last Post
JVC VCR seems to constantly track (re-track) tapes? finallygreen Video Hardware Repair 17 07-16-2022 10:35 AM
VHS has broken Control Track? Belmont Video Hardware Repair 2 12-25-2012 10:33 PM
On the right track to being capturing VHS? dummptyhummpty Project Planning, Workflows 3 10-10-2011 01:15 PM
Remove extra lines (empty lines) from copied/pasted text with Notepad++ kpmedia Computers 1 10-07-2011 05:32 PM
Replace audio track ninjastriker Edit Video, Audio 2 07-11-2006 05:51 AM

Thread Tools



 
All times are GMT -5. The time now is 11:56 PM