Fraps records video and audio unencoded, uncompressed, raw. That means the files are huge. 30 minutes of recorded gameplay footage are about 50-70 gigabyte large, and there's absolutely no way around that. Which brings me to my first point of this how-to: get a large HDD/SSD. I'm talking about 1 single HDD/SDD, specifically just for Fraps. 250 Gigabyte ought to do it. Recording video and audio uncompressed also means a huge tool on your computer initially.

Now, the trick is to set up your system in a way that Fraps, while recording, takes as little a tool as possible on your running game.

I have 3 HDDs. 1st HDD is partitioned in C, F, G. 2nd HDD is partitioned in E, H and 3rd HDD is unpartitioned, D. C is my System partition, H is my games partition and D is my Fraps HDD.

You see, 1 HDD for my system, 1 HDD for my games, 1 HDD for Fraps. They are all physically separated, which is imperative. Why am I doing it this way? When a game runs the read/write heads goes back and forth reading the game and deploying the data to your CPU/RAM/GPU. When Fraps records it causes the read/write heads to move around and write data on the HDD.

Now imagine you have a game running and Fraps recording on the same HDD/partition. That means the read/write head has to do double the work namely reading the game and writing the recording (in simplified terms, realistically it's more than double the work) on the HDD which in turn translates into FPS drops and "lags" in the game. And remember, recording uncompressed with Fraps already takes a huge tool on your computer.

So ideally you'd want your game running on one HDD and Fraps recording on another, physically separated, (unpartitioned) HDD. Another important point is the swap/page file. Make absolutely sure your swap/page file is not on the same HDD as Fraps or your games are. I've my swap/page file stowed on C: .

It took me a bit experimenting back then but all this lead to a more stable, even increased, FPS while a massive drop in "lags". It may not work for each and every one of you, but it did for me.

On a side note: Perhaps some of you are using SSDs and can share your experiences? I don't have a SSD, yet, so I can't say how well it works on SSDs.

Related posts:

1. Fraps & VirtualDub: How to save disk space and enjoy good quality, small file size HD video clips
2. VirtualDub 720p HD settings for YouTube! [Good quality, small file size]
3. Real-Time Screen capturing/recording easily done with VirtualDub and VHScrCap

The biggest problem most of us face while recording gameplay clips with Fraps is its disk space usage. Fraps records everything uncompressed, continuously (free version is limited to 30 sec.) and sequential. Meaning from start till stop the "whole" clip is split into single 4GB files (For FAT32 filesystem user convenience).

The length of a single 4 GB clip depends on the resolution and the in-game scene you record it in. For example, for me a 4 GB clip has about 90 sec. worth of gameplay in 1920x1200 resolution.

Because of this uncompressed real-time recording your frame-rates drops significantly while playing. There is NO way to keep up 40+fps with Fraps running unless you have one hell of a monster system.

Imagine what happens when you want to capture a 30+ min gameplay clip. Either you buy yourself a Terabyte HDD or you use a very simple trick: recording in half-size, upscaling and sharpening. Read the How-To guide!

This guide is intended for 16:10 and 16:9 resolutions. It should not be used for 4:3 resolutions. One cannot upscale a 4:3 resolution into a 16:9, i.e. true 720p or 1080p, without the end result either having black bars left and right or being over-stretched/-squeezed.

Recording in Half-screen/size

Before we start with VirtualDub transcoding, upscaling and sharpening, we first have to record our gameplay. We do not record our gameplay in full-screen/size mode, as usual, but in half-screen/size:

This means if you have a game running at 1920x1200 resolution, Fraps will record it at 960x600, or if you run it at 1280x1024, Fraps will record 640x512, etc. Which in turn translates into much more gameplay time in each 4 GB file.

Another example: While recording in 1920x1200, I only got about 90 sec. (1:30 min) per 4 GB file, recording in half the resolution (i.e. 960x600) resulted in about 360 sec. (6 min) per 4 GB file. Whole 270 sec. more!

Upscaling and Sharpening

We want HD Quality, so we're going to upscale and sharpen our recorded clip. Start up VirtualDub, open the uncompressed file, change in "Video" -> "Full Processing Mode" and "Audio" -> "Full Processing Mode", then set your VirtualDub according to this screenshot:

Save your settings via "File" -> "Save processing settings" or Ctrl+S, so you can simply load them in the future. Saves a lot of time!

Addendum: Regarding "Threads"; QuadCores = 6, DualCores = 3.

You'll need VirtualDub and the H.264 codec, which you can get here. Get the VFW-version, and pay attention if you're downloading x86(32bit) or x86_64(64bit).

The settings in the screenshot are the same ones like in "VirtualDub 720p HD settings for YouTube! [Good quality, small file size]", what differs, however, is that we are also going to use the "sharpen" filter. If you want a very detailed explanation what each option in the x264 codec does, check this out!

We call the method to resize a lower resolution (960x600) to a higher resolution (1280x720, in this case), UPSCALING (sometimes also refereed to as up-converting). For your information, 1280x720 is the Standard HD (720p) resolution. The other is Ultra-HD or Full-HD (1080p, 1920x1080).

However due the upscaling method we lose quality, which is where the filter "sharpen" comes in. Upscaling from lower to higher resolutions causes the image to "blur" (A more detailed explanation).  Sharpen counteract this.

You'll have to experiment with the slider in preview mode around a bit, until you find the result best to your liking. I found myself settling down between 23-30, depending on each clip.

When everything is set, start transcoding via "File" -> "Save as AVI".

Now on the other hand, if you UPSCALE from a lower resolution to HD resolution the video is not really HD material anymore, because you lose quality during upscaling. Just saying. It's at best pseudo HD.

Two important VirtualDub settings you should not forget:

"Options" -> "Preferences" -> "Threading": Set the "Video Compression Threads" to 1. This is important if you have a multi-core CPU to make use of the multiple cores and in turn speed up the transcoding process.

Since VirtualDub Version 1.9.4 there's an option to use your GPU as part of the transcoding process. Make use of it to additionally speed up your transcoding process. "Options" -> "Preferences" -> "3D accel", hack in the box.

Addendum 16.05.2010:
I've been getting mixed messages. Apparently using "3d accel" causes it to render slower than usual on some systems. I can confirm that. With 3d accel turned on, a 10min video takes about 1 hour 10-20 minutes, while turned off it takes about 1 hour max. You'll have to experiment on your system!

Addendum 23.10.2009:
There’s currently a problem causing VirtualDub 1.9.4 - 1.9.9, crashing under Windows 7. The culprit is 3D accel! Turn it off under “Preferences” -> “3D accel” and enjoy VirtualDub once again!

Update 27.01.2011:
Updated Setting screenshot

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So I set out to look for an Open Source/Freeware solution, and I've found one! VirtualDub coupled with VH Screen Capture Driver works like a charm!

First you need to download and install VH Screen Capture Driver, then you start up VirtualDub.

In VirtualDub you do the following:

Step 1:  Switch to Capture Mode

Step 2:  Select Capture Device

This is why you need to install VH Screen Capture Driver, before VirtualDub, otherwise you won't have the Screen Capture "Driver".

Step 3: Set your capture file

Choose its name and its location.

Step 4: Configure the capture devide / filter

You need to config VH Screen Capture Driver in order for it to run correctly.

Press "select" then put in your current desktop resolution in Width / Height. I'm running my PC in 1920 x 1200 resolution.

And that's pretty much it. Didn't cost a cent!

You can record uncompressed audio/video and transcode it later:

or you can choose to expirement with those setting to your best liking! I personally record uncompressed and transcode it afterwards.

Enjoy!

Edit: According to some users, this method does not work with Windows 7 and Windows Vista.

Addendum 18.08.2010:
If you are a Windows 7 user, I suggest you use Fraps to record your desktop. Fraps has the ability to record your Aero desktop, which is awesome. No more hassle. Start Fraps, and start recording.

Related posts:

1. Fraps & VirtualDub: How to save disk space and enjoy good quality, small file size HD video clips
2. VirtualDub 720p HD settings for YouTube! [Good quality, small file size]
3. VirtualDub: How to use mkv, mp4, flv, mov and other file formats with VirtualDub

Lately I've experimented with settings, and I think I found some good ones. Good video and sound quality with small file size were my goals. I think roughly 100 mb for a 5 min. clip and about 300mb for the full 10 min. in full 720p HD quality is awesome.

I'm still experimenting with sound compression but I think with 192 kb/s AC-3 ACM I have a good start.

Please bear in mind that the higher your resolution is the bigger your file size will be and vice versa. Those 100 mb respectively 300 mb are based on my 1920x1080 resolution!

This guide is intended for 16:10 and 16:9 resolutions. If you're playing on a 4:3 resolution, do not resize down to 1280*720p without maintaining aspect ratio, because the end-result will otherwise look over-stretched/-squeezed.

My settings for VirtualDub are in the picture below. If you want a very detailed explanation what each option does, check this out!

By the way, you have to have the H.264 codec installed to get it working. Download and install the latest VFW-version build here. PAY attention which version you're downloading, x86 (=32bit) or x86_64 (=64bit).

A warning about the Option "Multithreading" -> "Threads" don't set it higher than [# of your CPU Cores * 1.5] because then your whole system will start chugging. For example a Core 2 Duo would be 2 Cores * 1.5 = 3, a Q9550 would be 4 Cores * 1.5 = 6 and an AMD Phenom II X3 would be 3 Cores * 1.5 = 4.5 4.

This is by no means a guarantee that it will or will not work on your system. Each system, its components and its software are unique. You'll probably have to experiment a bit on your own. But those mentioned numbers are a good start.

It also might be necessary for you to adjust the audio volume to your liking. I have -10 dB, because the sound I record is terribad. My onboard sound sucks, period. Some people also experience asynchronous sound, here's how you can fix it.

On a side note: When you have uploaded your clip on YouTube and YouTube processed it the quality then will be lowered again. There's nothing you or I can do about that, it's up to YouTube.

The whole tutorial is also available on YouTube as a video:
http://www.youtube.com/watch?v=o9XOgnaJ_Hs

A few links to my own HD clips:
http://www.youtube.com/watch?v=nxijbXfIs4A&hd=1
http://www.youtube.com/watch?v=3yt35f2WFFY&hd=1
http://www.youtube.com/watch?v=Oe4jCQ8zzz0&hd=1
http://www.youtube.com/watch?v=eNLlobJbrm8&hd=1

Addendum 16.September 2009: Enabling GPU acceleration
Since version 1.9.4 it is possible to use the GPUs processing power (if your GPU supports it, which most modern GPUs do) as part of whole the transcoding process. This way you can speed up the transcoding process significantly (depending on your compression settings!).

On my computer this cut my transcoding time from an average 1h for a 10 min. clip down to some 40-ish minutes. Under "Options" -> "Preferences" enable "3D accel".

Addendum 23.10.2009: Crashes during encoding
There's currently a problem causing VirtualDub 1.9.4/5/6/7/8/9 to crash under Windows 7 while encoding sometimes. The culprit is 3D accel! Turn it off under "Preferences" -> "3D accel" and enjoy VirtualDub once again!

Addendum 16.05.2010: Option "3d accel" slowing down encoding
I've been getting mixed messages. Apparently using "3d accel" causes it to render slower than usual on some systems. I can confirm that. With 3d accel turned on, a 10min video takes about 1 hour 10-20 minutes, while turned off it takes about 1 hour max. You'll have to experiment on your system!

And if you are running on a multicore cpu, don't forget to enable threading via "Option" -> "Preferences" -> set "Threading" to 1!

Update 27.01.2011:
Updated Setting Screenshot

Related posts:

1. Fraps & VirtualDub: How to save disk space and enjoy good quality, small file size HD video clips
2. VirtualDub: How to use mkv, mp4, flv, mov and other file formats with VirtualDub
3. VirtualDub: How to split and merge video files