Welcome to Doom9's Forum, THE in-place to be for everyone interested in DVD conversion.

Before you start posting please read the forum rules. By posting to this forum you agree to abide by the rules.

 

Go Back   Doom9's Forum > Video Encoding > MPEG-4 AVC / H.264

Closed Thread
 
Thread Tools Search this Thread Display Modes
Old 19th August 2009, 13:27   #1841  |  Link
Audionut
Registered User
 
Join Date: Nov 2003
Posts: 1,281
Quote:
Originally Posted by SeeMoreDigital View Post
But those versions of DGAVCDec only work with (certain types of) Nvidia graphics cards.
Ah yes, I had forgot about the non nvidia versions.

Sorry ministrix, the version I linked to will only work with a nvidia card that has vp2 or greater.
__________________
http://www.7-zip.org/
Audionut is offline  
Old 19th August 2009, 13:34   #1842  |  Link
Guest
Guest
 
Join Date: Jan 2002
Posts: 21,901
You can either concatenate the M2TS files before loading into DGAVCIndex or you can demux to one file using tsmuxer.
Guest is offline  
Old 21st August 2009, 02:12   #1843  |  Link
MatLz
I often say "maybe"...
 
MatLz's Avatar
 
Join Date: Jul 2009
Location: France
Posts: 583
I have noticed the loss of some kb when I demux video, compared to original stream. What is the reason?
MatLz is offline  
Old 21st August 2009, 02:16   #1844  |  Link
Guest
Guest
 
Join Date: Jan 2002
Posts: 21,901
When you demux you no longer have the other elementary streams, such as audio. You also no longer have the muxing overhead.

Last edited by Guest; 21st August 2009 at 02:31.
Guest is offline  
Old 21st August 2009, 02:42   #1845  |  Link
MatLz
I often say "maybe"...
 
MatLz's Avatar
 
Join Date: Jul 2009
Location: France
Posts: 583
Quote:
Originally Posted by neuron2 View Post
When you demux you no longer have the other elementary streams, such as audio. You also no longer have the muxing overhead.
In fact it's when I just put a .264 it happens. For example, when I put the stream out of a mkv or a mp4 (like as I did for test the inloop deblocking : put out from my mkv with mkvextract)
So it remains some overhead?
MatLz is offline  
Old 21st August 2009, 03:19   #1846  |  Link
Guest
Guest
 
Join Date: Jan 2002
Posts: 21,901
Your question is so vague it's hard to make sense of it.

Case 1: You have just an AVC elementary stream in the MKV. You demux the AVC stream and compare the size of the MKV to the size of the demuxed AVC stream.

Case 2: You start with an AVC elementary stream, put it into an MKV, extract it and then compare the extracted AVC stream to the original AVC stream.

Case 3: ...

You have to tell me exactly what you are doing.

Last edited by Guest; 21st August 2009 at 04:00.
Guest is offline  
Old 21st August 2009, 03:42   #1847  |  Link
MatLz
I often say "maybe"...
 
MatLz's Avatar
 
Join Date: Jul 2009
Location: France
Posts: 583
I have test the deblock=false in the dgavcdec filter. For that, that I have extract the .264 stream out the mkv I made.
I puted this .264 file in dgavcindex and use demux video stream.
Result: a loss of some kb.
MatLz is offline  
Old 21st August 2009, 03:48   #1848  |  Link
Guest
Guest
 
Join Date: Jan 2002
Posts: 21,901
Quote:
Originally Posted by MatLz View Post
I puted this .264 file in dgavcindex and use demux video stream.
It makes no sense to demux from an elementary stream. Why are you doing that?

If you post the AVC stream that you input into DGAVCIndex I can try to identify why the operation is not acting as a no-op.

Last edited by Guest; 21st August 2009 at 04:01.
Guest is offline  
Old 21st August 2009, 03:58   #1849  |  Link
Guest
Guest
 
Join Date: Jan 2002
Posts: 21,901
OK, I duplicated it and here is the explanation.

DGAVCIndex maps 00 00 00 01 xx start codes to 00 00 01 xx. According to my reading of the spec and my testing, this is not a problem, and in fact no-one has ever reported any problem with it.

If you have a compelling reason why the original extra 00 bytes should be retained, I can consider outputting them.

Last edited by Guest; 21st August 2009 at 04:13.
Guest is offline  
Old 21st August 2009, 04:15   #1850  |  Link
MatLz
I often say "maybe"...
 
MatLz's Avatar
 
Join Date: Jul 2009
Location: France
Posts: 583
I know "demux" word, but I did it, point. I'm curious, that's all.
Well, so curious I just tried with .264 stream directly encoded by X264 (not extract out of a mkv).
There is a negligible loss of 0.014% but a loss at all.
That was my question.
MatLz is offline  
Old 21st August 2009, 04:21   #1851  |  Link
Guest
Guest
 
Join Date: Jan 2002
Posts: 21,901
Quote:
Originally Posted by MatLz View Post
There is a negligible loss of 0.014% but a loss at all.
It's actually a gain, because you have a smaller file size with exactly the same video content.
Guest is offline  
Old 21st August 2009, 04:31   #1852  |  Link
MatLz
I often say "maybe"...
 
MatLz's Avatar
 
Join Date: Jul 2009
Location: France
Posts: 583
Quote:
Originally Posted by neuron2 View Post
It's actually a gain, because you have a smaller file size with exactly the same video content.
In fact, I noticed that a long time ago and use this "method" for, in my mind, have better compatibility with dgavcdecode.
MatLz is offline  
Old 21st August 2009, 04:40   #1853  |  Link
Guest
Guest
 
Join Date: Jan 2002
Posts: 21,901
Quote:
Originally Posted by MatLz View Post
In fact, I noticed that a long time ago and use this "method" for, in my mind, have better compatibility with dgavcdecode.
There is no issue of compatibility. The specification for NALU parsing supports both forms of NALU delimiters I described, and my tools obviously implement the spec. Any other tool that correctly implements the spec will also have no problem with either method.
Guest is offline  
Old 23rd August 2009, 20:03   #1854  |  Link
Guest
Guest
 
Join Date: Jan 2002
Posts: 21,901
Wrong thread if you're talking about the NV version.

Post a link to the first two source fragments. I assume you mean you have a lot of source files, and not one that you split in your script. If that's not so, explain it and give your script.

Please reply in the correct thread.
Guest is offline  
Old 27th August 2009, 08:28   #1855  |  Link
hannah
Registered User
 
Join Date: Sep 2005
Posts: 41
I have this Sony AVCHD handycam (Model: HDR-SR12). This is a hard-drive camera. The video files have an extension *.mts

I am currently using DGAVCIndex 1.0.9 to generate *.dga which really works fine. I then serve this in my avisynth. This version of DGAVCIndex cannot process more thn 1 .mts file.

Is there a version of DGAVCIndex available which can process multiple .mts file and generate one .dga file please?

Many thanks in advance.
hannah is offline  
Old 27th August 2009, 13:27   #1856  |  Link
Guest
Guest
 
Join Date: Jan 2002
Posts: 21,901
Yes, DGAVCDecNV can do it, but it requires a supported Nvidia graphics card.

http://neuron2.net/dgavcdecnv/dgavcdecnv.html

As a workaround for DGAVCDec you can merge the M2TS files using DOS COPY /b.
Guest is offline  
Old 28th August 2009, 00:15   #1857  |  Link
hannah
Registered User
 
Join Date: Sep 2005
Posts: 41
Quote:
Originally Posted by neuron2 View Post
Yes, DGAVCDecNV can do it, but it requires a supported Nvidia graphics card.
thanks a lot..unfortunately I do not have a Nvidia graphics card. I am already merging the .mts files however it's tiem consuming and takes up double the space.

Thanks again for your input.
hannah is offline  
Old 30th August 2009, 09:17   #1858  |  Link
Varies
Registered User
 
Join Date: Aug 2008
Posts: 64
neuron2
Whether add use DDS2 (haali avss.dll fast & HQ) optionally instead of libavcodec is possible?
__________________
message transgoogled :)

Last edited by Varies; 31st August 2009 at 07:08.
Varies is offline  
Old 28th September 2009, 18:26   #1859  |  Link
Jawed
Registered User
 
Join Date: Jan 2008
Location: London
Posts: 156
Artefacts with version 1.0.9

I have a problem with artefacts appearing in a BBC iPlayer download. I have created an MKV of the offending section of original video (a zoom on a photograph) and included the script that shows this problem:

http://www.mediafire.com/?mizmxjozkzu

See the artefacts that suddenly disappear at frame 241.

Using directshowsource doesn't produce this problem.

Jawed
Jawed is offline  
Old 28th September 2009, 18:33   #1860  |  Link
Guest
Guest
 
Join Date: Jan 2002
Posts: 21,901
Can't duplicate it with your sample. It works perfectly for me.

I demuxed the video from the MKV and made a project, etc.
Guest is offline  
Closed Thread

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +1. The time now is 16:08.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.