Quantcast FFmpeg: Using the Same Source to Compare Results (HDTV) - Page 2 - digitalFAQ.com Forums [Archives]
Go Back    digitalFAQ.com Forums [Archives] > Video Production Forums > Video Encoding and Conversion

Reply
 
LinkBack Thread Tools
  #21  
02-06-2004, 07:34 AM
GFR GFR is offline
Free Member
 
Join Date: May 2002
Posts: 438
Thanks: 0
Thanked 0 Times in 0 Posts
What about short VOB trailers like DTS or DD trailers?
Reply With Quote
Someday, 12:01 PM
admin's Avatar
Site Staff / Ad Manager
 
Join Date: Dec 2002
Posts: 42
Thanks: ∞
Thanked 42 Times in 42 Posts
  #22  
02-06-2004, 07:46 AM
incredible incredible is offline
Free Member
 
Join Date: May 2003
Location: Germany
Posts: 3,189
Thanks: 0
Thanked 0 Times in 0 Posts
Send a message via ICQ to incredible
Quote:
Originally Posted by GFR
What about short VOB trailers like DTS or DD trailers?
Nice Idea but they do not contain a variety of calm/complex/light/dark scenes.


The best would be to load a m2v 23.976 from a dvd source (why HDTV?) into "mpeg2schnitt" ( http://mdienert.winnt.de/Mpeg2Schnitt06g.zip ) means "mpeg2cut".
I think that appl. is very useful to cut m2v's (demuxed vobs) and therefore to slice a movie into useful parts with a total length of ca. 2mins, which would give us a perfect "encoding-testing-object"

If I have the time tonight, I will do such a sliced 2min. sample on the movie "Titanic" as it gots that exactly mentioned variety of scenes as I mentioned above .... and " complex water"-scenes and also "dark underwater scenes"!!! Very useful as such scenes are addicted according to bitrate-peaks and bitrate-lows!

So I will (If I got the time) create a new free Arcor.de account for approx. 1 or two days which schould be able - within these 2 days according to traffic - to handle such a sample-size.
Reply With Quote
  #23  
02-06-2004, 11:35 AM
kwag kwag is offline
Free Member
 
Join Date: Apr 2002
Location: Puerto Rico, USA
Posts: 13,537
Thanks: 0
Thanked 0 Times in 0 Posts
Maybe a pice of a SuperBit DVD

-kwag
Reply With Quote
  #24  
02-06-2004, 11:54 AM
Krassi Krassi is offline
Free Member
 
Join Date: Mar 2003
Location: Germany
Posts: 390
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by kwag
Maybe a pice of a SuperBit DVD
Are they better than "normal" DVD's? Do you have one

I've found some HDTV progressives here:
http://www.microsoft.com/windows/win...tShowcase.aspx
The problem is that they are encoded in WM9
Still searching for other sources...
Reply With Quote
  #25  
02-06-2004, 12:00 PM
Dialhot Dialhot is offline
Free Member
 
Join Date: May 2003
Posts: 10,463
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by Krassi
Are they better than "normal" DVD's?
Superbit DVD have only the movie and no more than 2 audio streams (original in 5.1 or DTS - and local language in 2ch). That give more space to the movie and it is generally encoded at an avg bitrate near 8000.
That is theorically better than the regular version of the same movie where there are a lot of bonus.

But some superbit are big supersh!t (the master used was so bad that the benifit of bitrate does not help !)
Reply With Quote
  #26  
02-06-2004, 12:52 PM
kwag kwag is offline
Free Member
 
Join Date: Apr 2002
Location: Puerto Rico, USA
Posts: 13,537
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by Dialhot
But some superbit are big supersh!t (the master used was so bad that the benifit of bitrate does not help !)
That's right
I do have one SiperBit DVD. I'll take a look at it, and see if there's a small clip with mixed action and details, and also I'll look for a clean part.
I'll give that a look in the next few hours, and I'll post here.
We're DEFINITELY going to have to put this on BitTorrent, to distribute the load
Probably I'll post the VOB in the site, PM a couple of users running BitTorrent clients, and then post the ".torrent " file, which contains the meta information so everyone can download it.

-kwag
Reply With Quote
  #27  
02-06-2004, 12:59 PM
kwag kwag is offline
Free Member
 
Join Date: Apr 2002
Location: Puerto Rico, USA
Posts: 13,537
Thanks: 0
Thanked 0 Times in 0 Posts
But, are you all aware that the "emotion.mpg" is interlaced, and the sample I encoded with ffvfw,is interlaced, using KVCD's matrix

-kwag
Reply With Quote
  #28  
02-06-2004, 01:14 PM
kwag kwag is offline
Free Member
 
Join Date: Apr 2002
Location: Puerto Rico, USA
Posts: 13,537
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by incredible

Interlaced encoding:

- You need the Notch in alternate scan ordered version!
I always have my doubts about that, because no matter what the scan order is, the frequency domain for each part (block) of a quantization matrix, is always the same
It doesn't matter how you scan a matrix. The frequency spectrum for each block will always be the same.
I believe that is an encoder dependant issue, and as seen with ffvfw and KVCD's matrix, it works just as well on progressive or interlaced material.

-kwag
Reply With Quote
  #29  
02-06-2004, 07:02 PM
kwag kwag is offline
Free Member
 
Join Date: Apr 2002
Location: Puerto Rico, USA
Posts: 13,537
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by kwag
I'll give that a look in the next few hours, and I'll post here.
Sorry, but I had a busy day
So not today

-kwag
Reply With Quote
  #30  
02-06-2004, 07:36 PM
vhelp vhelp is offline
Free Member
 
Join Date: Jan 2003
Posts: 1,009
Thanks: 0
Thanked 0 Times in 0 Posts
About emotion.mpg ...

I did a few tests w/ this source (big resolution, and more time to process)
this might impeed or slow down our debuggin process. But still, I did encode
it w/ both ffvfw and TMPG. My conclusions were thus:
* TMPG did a better job.
.
.
It could be because I am using another version of ffvfw, however.
I did not like the final output of ffvfw. I encoded emotion.mpg w/ the same
paramters.
.
.
But, imo, the source was good quality.


@ incredible..

wait.. I would hold off on such complex scenes as those that
you are indicating. Why ? ..because we're all still debuggin this
ffvfw out and the worse thing we all can do is "pit" it up again the
worst case scene, when we really should be getting it working right
with easy scenes. Then, we take the harder steps higher on complex
scenes. This way, we are not waisting so much energy on difficult
scenes in the beginning. IMO, I would not recommend starting off w/
really complex scenes. First get the easier scenes encoding right,
because it's easier to debug ffvfw on these.. and the process would
probably go that much quicker

Also, mpeg2schnitt (or variant) was posted by kwag some time ago
when we were researching VOB encoding issues (I can't remember the exact
issues ) I believe it was back in July/2003, when we were trying
to figure out TMPG's [x] Force picture type setting to use a
bitrate based off the Average bitrate that vdubMOD was given us as an
average, and plugging that in to TMPG. If kwag remembers that fun.
.
.
Plus, that tool you mentioned is in German . There is an MPEG2Cut v1.15
out. Do a search for MPEG2Cut-1.15.rar. It's based off dvd2avi
I believe.. MPEG2Cut by Jackei/Symbiose/Dark Avenger


** Main Site: http://www.digital-digest.com/dvd/do.../mpeg2cut.html
* --> http://www.digital-digest.net/downlo...G2Cut-1.15.rar
* --> http://www.digital-digest.net/downlo...G2Cut-1.15.rar
* --> http://mitglied.lycos.de/darkav/down...ource-1.15.rar
* --> SOURCE: http://mitglied.lycos.de/darkav/down...ource-1.15.rar
***** Forum: http://mitglied.lycos.de/darkav/
.
.
* --> you can get RocketJet4's mod of above tool on his main page
* --> http://www.geocities.com/rocketjet4/
* --> Tool: http://www.geocities.com/rocketjet4/...203__ALPHA.zip - 04Feb2004
***** EzBoard: http://pub31.ezboard.com/fdarkavengerssiteforumfrm1



Here's Suggestion #1

Find a DVD source (we all have ) and, as a consortium, we all
agree (have concensus) on various scenes, and (ie, easy/mid/hard) and
cut those three out, and VOB them as one source, then U/L them. Now..
If there is a (c) issue w/ this, then we can still perform this
w/out (c) problems. This is something we could post in a sticky thread
here, the receipee, and only then, it's up to the individual to obtain the
exact same dup of our madness to debug ffvfw (or any other codec or
encoder out there) using the example below as a bases.. though you can
mod'fy it if need by.:

* DVD Title
* Chapters to cut from
* exact spots
* Merge those together
...actually, you don't have to merge them. Just make sure that the
...VOBs are in numerical order, and when you dvd2avi it to a .d2v source,
...it will segment them together - vualla!! Less work for the dummies
...out there wanting to take part :P


Here's Suggestion #2

Regarding above, we could all contribute to a "POOL" of cut-scenes that we all
could take part in. Our results could be logged somewhere's or someone could
tally the results of those that post (offline at their leasure)
Always good ta have someone take notes


-vhelp
sfilters: picture; images; pics;
Reply With Quote
  #31  
02-06-2004, 09:55 PM
vhelp vhelp is offline
Free Member
 
Join Date: Jan 2003
Posts: 1,009
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by kwag
Hi jellygoose,

Right now, Bit Torrent is probably the most robust protocol on the net. The way it works, is different to other file sharing protocols. The way it works, is that only the files you have downloaded, are available to others. For example, if you start downloading our kvcd compatibility image file, you simultaneously start uploading parts of the same file, and you can't avoid that. That's why you contribute to the load balancing on the network. Also, the protocol has automatic resume features, and also downloads form many simultaneous users.
It's far more efficient that Kazaa(FastTrak), E-Mule (E-donkey), DC++, WinMX, You name it. I've tried them all
Currently, the most interesting OF ALL, is M.U.T.E., which is ANONYMOUS (can't track IP addresses ), but it's still in early stages, and doesn't do auto resume or download from many simultaneous (swarm downloads) users.
But I'm keeping an eye on that one, VERY seriously
http://mute-net.sourceforge.net/

As a matter of fact, if you try M.U.T.E. right now, and search for "kvcd", you should see the only file I'm sharing, which is "kvcd-compat-v2.nrg"
Give it a try

And here's the link for probably the best Bit Current client available at this moment:
http://www.lanspirit.com/bss/bsrc3.exe

-kwag
.
.
and then,
.
.

Quote:
Originally Posted by kwag
Quote:
Originally Posted by vhelp
Kwag...

How hard is it to set up on a 56k dialup (or would that cause a certain death ?? )
Not hard at all
Quote:

Sharing band-width is ok by me :P but I don't want to hurt anyone if 56k
dial-up is gonna impact this idea. I like it though :P
Not at all, because you can actually be sending one block (one segment of data), while the person receiving is actualy receiving, for example 5 other parts, from other people, simultaneously.
So you're actually helping the bandwidth.
The bandwidth is cumulative. So say someone is receiving 5 parts from 5 people at 56Kbps, he's actually receiving a total speed of 56Kbps * 5
Quote:

I have a firewall installed, Sygate Personal Firewall v5.5 working
rather nicely - - I'm happy :P
If you use Bit Torrent, you must open ports 6881 to 6999 fot incoming TCP connections. That's all.
Quote:

Note, link to app below is dead.
* http://www.lanspirit.com/bss/bsrc3.exe

-vhelp

Yep, site is down.
It was up this afternoon.
Well, you can really use ANY of the many Bit Torrent clients.
Here are a few:
http://pingpong-abc.sourceforge.net/download.html
http://www.bt.degreez.net/
http://bitconjurer.org/BitTorrent/

But really the best one with the best user interface is BitSpirit, so you might want to check the site later.

-kwag
@ Kwag..

Is this the same thing ??

I was doing some searching (for everyone ) and came up w/ this one
for BT ? :

* http://www.lanspirit.com/forum/index...&showtopic=431
* Fefered to as "BitSpirit" --> http://mitglied.lycos.de/tuxman666/bitspirit.htm

* D/L File: http://mitglied.lycos.de/tuxman666/bssfinal2.exe

???
-vhelp
Reply With Quote
  #32  
02-06-2004, 10:45 PM
kwag kwag is offline
Free Member
 
Join Date: Apr 2002
Location: Puerto Rico, USA
Posts: 13,537
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by vhelp

@ Kwag..

Is this the same thing ??

I was doing some searching (for everyone ) and came up w/ this one
for BT ? :

* http://www.lanspirit.com/forum/index...&showtopic=431
* Fefered to as "BitSpirit" --> http://mitglied.lycos.de/tuxman666/bitspirit.htm

* D/L File: http://mitglied.lycos.de/tuxman666/bssfinal2.exe

???
-vhelp
Hi vhelp,

The bittorrent protocol, and clients (which change on a daily basis) just get better every day

Go and get this:
http://www.torrentstorm.com/

-kwag
Reply With Quote
  #33  
02-18-2004, 05:14 AM
Krassi Krassi is offline
Free Member
 
Join Date: Mar 2003
Location: Germany
Posts: 390
Thanks: 0
Thanked 0 Times in 0 Posts
I just got back from a short vacation and finally received my second DVB capture card (Skystar 2). I've just recorded some samples from Euro1808 and the transmissions where great (suberb quality). Let me sort out some samples, i will post some links to screenshots then and we could then (maybe ) agree to use one of these samples.

My power supply on this machine gave up with some smoke signals after one hour of capture
Reply With Quote
  #34  
02-19-2004, 02:59 AM
Krassi Krassi is offline
Free Member
 
Join Date: Mar 2003
Location: Germany
Posts: 390
Thanks: 0
Thanked 0 Times in 0 Posts
So with these two links
Basketball, 1.4 MB
Eau Rouge

you can see some screenshots of my samples.

I have recorded some short samples of a concert in a church and some sport scenes (where the images above are from).

The only problem is my bandwith, so we have to go the filesharing-way

I will post some other samples if you are interested.

Here are the infos from bitrate viewer:
Code:
Num. of picture read: 118
Stream type: MPEG-2  MP@HL  VBR
Resolution: 1920*1088
Aspect ratio: 16:9 Generic  
Framerate: 25.00
Nom. bitrate: 19132400 Bit/Sec
VBV buffer size: 488 
Constrained param. flag: No 
Chroma format: 4:2:0
DCT precision: 10
Pic. structure: Frame
Field topfirst: Yes
DCT type: Field
Quantscale: Nonlinear
Scan type: ZigZag
Frame type: Interlaced
Reply With Quote
  #35  
02-19-2004, 03:40 AM
incredible incredible is offline
Free Member
 
Join Date: May 2003
Location: Germany
Posts: 3,189
Thanks: 0
Thanked 0 Times in 0 Posts
Send a message via ICQ to incredible
Hi Krassi, welcome home again,

I see that the interlacing of your basketball.jpg is well damaged!
A typical output if someone encodes interlaced conted using to low bitrate, as interlacing needs much mor avg bitrate.

Quote:
Pic. structure: Frame
Field topfirst: Yes
DCT type: Field
Scan type: ZigZag
Frame type: Interlaced
Does make me wondering as BRV tells you "interlaced/DCT Fieldtype" but ZigZag used
Reply With Quote
Reply




Similar Threads
Thread Thread Starter Forum Replies Last Post
Recording HDTV to HDTV nicksteel Video Capturing / Recording 1 12-11-2006 03:52 PM
Avisynth: HDTV source to KDVD? TBO Avisynth Scripting 3 01-31-2006 12:29 PM
FFMPEG: FFVFW testing results/concerns poerschr Video Encoding and Conversion 8 03-11-2004 12:11 PM
FFMPEG: Do ffvfw and mencoder/ffmpeg give the same results? Razorblade2000 Video Encoding and Conversion 4 02-06-2004 04:23 PM
FFMPEG: -sameq use same video quality as source (implies VBR) Razorblade2000 Video Encoding and Conversion 0 10-01-2003 11:09 AM




 
All times are GMT -5. The time now is 07:34 AM  —  vBulletin © Jelsoft Enterprises Ltd