Author Topic: How does Dxtory capture audio?  (Read 17266 times)

Mora

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Re: How does Dxtory capture audio?
« Reply #45 on: July 01, 2013, 03:41:49 am »
Doesn't Fraps split the video in parts. Like 10mins each? Another simple fix would be to just stop and start recording every now and then, to reset the delay.

De-M-oN

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Re: How does Dxtory capture audio?
« Reply #46 on: July 01, 2013, 04:01:23 am »
Newer fraps versions have a checkmark option if they should do 4 GB splits or not.

Quote
Another simple fix would be to just stop and start recording every now and then, to reset the delay.
But dont forget to correct the lengths of the tracks for each file if you set them together later.

Fish

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Re: How does Dxtory capture audio?
« Reply #47 on: July 17, 2013, 11:05:15 am »
Add another to the list. Fraps (and other software) works perfectly for recording. Dxtory gives me out of sync audio. But it's happening much faster than described in this thread.

At about 20 seconds into the video, there's a noticeable desync of about 1/3 of a second (10 frames). Sometimes less, sometimes more. But that's about average.

Fish

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Re: How does Dxtory capture audio?
« Reply #48 on: July 17, 2013, 11:31:26 am »
Exkoder, for me this issue arose when I updated to the most recent Dxtory. I was running a version 2-3 versions old and it worked fine. Can you make older versions available for download for those of us having this issue?

UPDATE: You can disregard that idea. I tried various older version of Dxtory going back to 2.0.112, mixed with various versions of the Nvidia drivers going back to 314.22. It was a long process... and annoying. But the end result was that I'm still 1/4-1/2 second off on the audio of any files recorded with Dxtory. I also tested with Fraps at every stage -- No audio desync at all. Every video was also tested in BOTH Sony Vegas Pro 12 and Adobe Premiere Pro CC. The results were the same, regardless of the editing software.

My only guess is that it has something to do with Windows 8, since the last time I was recording regularly was when I was on Windows 7.
« Last Edit: July 17, 2013, 04:17:16 pm by Fish »

zerowalker

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Re: How does Dxtory capture audio?
« Reply #49 on: July 17, 2013, 10:11:33 pm »
Your problem isn´t the same as the threads.
The problem you are facing is caused by something, as it has various differences.

Our sync problem is the same all the time (it depends on hardware, but for me it´s about 75ms per hour).
Some people can have it speed up by 1 second per hour, or slow down by 1 seconds, it´s always different.
But it never changes, unless the user change the soundcard or perhaps motherboard.

Fish

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Re: How does Dxtory capture audio?
« Reply #50 on: July 18, 2013, 06:43:54 am »
You're right. I was able to fix it by installing 3rd party sound card drivers from PAX. Creative makes such horrible software.

Malix

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Re: How does Dxtory capture audio?
« Reply #51 on: July 18, 2013, 04:22:57 pm »
hmm, wonder if my issue could be fixed with drivers too, the asus xonar drivers have been said to be weak too.

OH WELL, maybe I'll break my system and try the UNi Xonar drivers, since they have claim to have option for ridiculously low latencies and whatnot.

EDIT:
Now that I spent some time on UNi Xonar driver page, I came accross this: http://www.thesycon.de/eng/latency_check.shtml
Quote
Thesycon’s DPC Latency Checker is a Windows tool that analyses the capabilities of a computer system to handle real-time data streams properly. It may help to find the cause for interruptions in real-time audio and video streams
So, probably worth a try to see if there is something weird going on with audio stuff in general.

EDIT2:
Also found this: http://forums.guru3d.com/showpost.php?p=3770113&postcount=2
apparently having high precision event timer (HPET) enabled in bios is BAD for DPC latency.

EDIT3:
(well spent lunch @ work, heh)
Mixed opinions & results accross the board with HPET ON/OFF, also apparently win7 (probably 8, too) must be specifically told to ENABLE the use of HPET. go figure.

also, atleast my throwaway win7 laptop here went more stable & lower on DPC latency when I completely disabled core parking. Core parking basically is turning off "idling" cpu cores, windows does this way too aggressively, it seems. http://bitsum.com/about_cpu_core_parking.php

Will do testing with DxTory when I get off from work :)
« Last Edit: July 18, 2013, 06:19:32 pm by Malix »

Malix

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Re: How does Dxtory capture audio?
« Reply #52 on: July 19, 2013, 06:00:46 pm »
So, did all I could with the xonar drivers & latencies, no dice. DxTory audio still goes off sync with time.

Malix

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Re: How does Dxtory capture audio?
« Reply #53 on: August 20, 2013, 05:30:44 pm »
*BUMP*

could this http://www.hwbot.org/news/9824_breaking_windows_8_benchmark_results_no_longer_accepted_at_hwbot/ be the cause for the audio/video sync drifting? Apparently Win8 has some weird clock drifting issues.

De-M-oN

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Re: How does Dxtory capture audio?
« Reply #54 on: August 21, 2013, 05:44:15 am »
Can you please do a test with 25fps.

I do for someone the audio editing in audition for his lets plays and so I get for every video his audiofiles and he records in 25fps and some other games in 30fps. His 25 fps videos have all the same length +40ms.

I mean

video is for example 35:10.500
then both audiotracks are 35:10.540.
Everytime the same lengths + 40ms.

His 30fps videos have always different difference between videolength and audiolength and also both audio tracks have then different lengths.