Quality Test - MSI Afterburner's MJPEG Implementation (Part I) with Hitman: Absolution (Ultra Settings, 1080p)

Update: Added screenshot example of the RTV1 codec 'color banding' issue, with circled areas¹**
Update: Added Quality Test Comparison (Four 1080p samples of Hitman:Absolution) at different Quality Settings²**

Recording with the MJPEG (Motion JPEG) codec, every frame is an independent 'Keyframe 'or 'I-Frame' (short for "Information Frame"), which means it is a type of frame that can be 'cut' or started from in video editing programs (technically, every frame is a JPG picture!). This also allows for faster seeking and rendering in editing applications. MJPEG also requires less overhead (better performance/less 'lag' while recording) than many codecs. As well, the audio captured is PCM ("Uncompressed") with MSI's Afterburner, which means that any video editor should be able to recognize the sound data. Errors in programs like Virtualdub saying "Error initializing audio stream decompression" or Sony's Vegas showing "Stream attributes could not be determined" will not occur and these will open the audio without associated problems.

Testing out MSI's Afterburner as a game recorder and using the built-in MJPEG codec that comes with the program, I fired up some Hitman: Absolution, turned up everything to Ultra, captured some clips and put them together, uploaded it to YouTube, and collected some results with everyone:

This video compilation is a test of a few things:
1) Hitman: Absolution's performance while maxed out (Ultra Settings in game Options)
2) Capture quality of MSI Afterburner and performance/lag of using it
3) H.264/AVC compression quality maintainability
4) Youtube's quality maintainability

Recorded with:
MSI Afterburner
- v.2.3.0
- MJPEG codec, "Full Frame", 80% quality, 30fps
- Audio automatically records into PCM ("Uncompressed") format

Recorded Game: 
Hitman: Absolution @ 1920x1080 (1080p)
- "Ultra" settings (Preset)
- Anisotropic Filtering set to 4xAA
- "Texture Filtering Quality" set to High Quality (i.e.Off/NoFiltering) in Control Center

- "Morphological" Anti-Aliasing (MLAA) setting (AMD/ATi) set to ON
- "Surface Format Optimization" set to OFF in Control Center (AMD/ATi)

Framerate while not recording: ~31-79fps
Framerate while recording: ~28-64fps

I chose some Hitman: Absolution clips for a Quality Test because it was a good example of a recent game (at the time of this writing) that includes both fast movement/action areas on the screen, as well as slow/non-moving parts, including text. It has lots of dark and light areas, high contrast edges, particles (rain/filmgrain/sparks,etc) and tests area panning as well.

I was impressed with MSI Afterburner and it's utilization of the MJPEG codec overall. It seems to be slightly optimized or tweaked somewhat. At 80% Quality (to be in the realm of comparison with Bandicam's MJPEG Preset Default of 'Quality80'), flatter/darker parts were not overly compressed - which would create excessive macroblocking and/or be too smoothed out, normally. This could be partially due to the 'Film Grain' effect within the game, however (seen mainly when the sky or a flat-coloured background is in view).
In other words, there was very little Gibbs Effects aka 'Ringing' ("mosquito noise") around elements such as text when onscreen, and what effects were there, were 'hidden' somewhat by the grain effect. You had to look closely to see it, which is still pretty good for not recording in a 100% Quality setting - but again, the 'Film Grain' effect in this game is contributing to this 'negative effect of the MJPEG codec' not being as visible.

A small amount of Gibbs Effects/Mosquito Noise/Ringing can be seen around and within the UPC symbol  from this frame taken out of the original MJPEG recording. It is about as visible and even seems to be less so in the video itself, due to the "Film Grain" effect present in the game helping to hide it. Click to see Full Size

The very small amount of color banding present in the original recording was somewhat generated by the Game Engine and there is very little of it (what does occur is hidden somewhat with the film grain effect the game has).
In the recorded output, thankfully there is very little, partially because of a higher-quality setting when used and how MJPEG codec handles color dithering; color banding usually won't be seen very much at higher bitrate/quality settings (which means low compression), but will be easily seen at lower bitrate/quality settings (which uses higher compression).
Keeping above 80% quality when recording with the MJPEG codec [I recommend recording at 90% if your system can handle it, as most games do not have the Film Grain effect present in Absolution to help hide compression artifacts, such as color banding, flat color/area macroblocks and Gibbs Effects] if you have the space, it should leave you satisfied with easily-editable captures.

²**Quality Test Comparison - Four examples of various Quality Settings (90%, 70%, 50% and 30%) when using MSI Afterburner's MJPEG Codec in Hitman: Absolution. The differences are most apparent in the middle section, the bricks that the police officer is standing on, and the people milling around to the left of the gazebo, both areas showing colour loss (Posterization) and detail loss (Quantization), more obvious in the 30% sample (bottom). All sources were original output frame extractions from 1080p recordings.
Click to see Full size

[A quick note here that MSI Afterburner's output/recording seems to be somewhat darker than other game recording programs. It even states this in it's own Options, "captured video may appear darker than you see it while gaming" and offers a checkbox that will apply Gamma Correction. Since this article is more about MSI's MJPEG optimization and utilization (performance and ability to maintain visible quality), this 'darker recording' will be explored further in a future Game Recorder Comparison article]

For people trying out any game recording software and finding your recordings are choppy/laggy on playback (that is, when you are looking at the generated/recorded file), you should find that if you use a player/viewer that has Acceleration (GPU, videocard, DirectX processing), it should play back much more smoothly. If your system does not have this option, you can also try converting what is captured to another file temporarily, one with a smaller bitrate/size, and you should then find it will play back that converted file just fine (especially when recording with lossless/high-bitrate codecs).


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It was interesting to do some side recording with Afterburner's included RTV1 codec as well*
The Riva Tuner Video codec is an iteration related to older codecs such as Indeo Video and S3TC compression techniques. It is similar to MJPEG and it seems to have very little effect on performance while recording - even performing slightly better than MJPEG at times, which was a nice surprise. Unfortunately, it suffers from 'color banding' (Color Quantization/Posterization) and the result is apparent lower quality, even at high bitrate/quality settings. Although it may not be as obvious in the below comparisons (depending on the settings of your monitor/colors/brightness), and while it certainly does not 'destroy the quality overall' in the game recording, in the captured video the color banding can be very distracting, especially when it includes motion through the color and light changes in an area as you move through it [it may not be to everyone, of course]. The size of the file produced is quite a bit larger than when recording with the MJPEG codec as well, but more on that in a future article..

*As this article is mainly a Test of Afterburner's usage of the MJPEG codec, a future Game Recorder Comparison article will include the RTV1 codec found in MSI's Afterburner and cover it in more detail than here

¹**An example of the RTV1 codec's problem with Color Quantization ('color banding'). This frame is extracted directly from a 100% Quality RTV1 codec recording (Batman: Arkham City Benchmark @ 1080p). The areas that contain the most obvious color banding problem have been highlighted with green circles.

If you are having problems with Color Banding that is not in the game itself, try to use a higher-bitrate setting (higher quality) for the codec you are recording with, resulting in lower compression and lowered loss of details, if you can do so.
[With the RTV1 codec, it appears that it will still remain a little, no matter what...]

...


Getting back to MJPEG testing with Afterburner, framerate was maintained close to non-recording performance (at ~30-60+fps for this game) when recording. I usually used MSI's Afterburner only as a monitor/controller for the videocards installed and captured with another program such as FRAPS or Bandicam. Using MSI Afterburner alone and having to run one less application in the background to capture no doubt had at least some sort of streamlining affect on performance. It felt that way, slightly.

Clear, crisp textures can be seen in this frame taken from the original MJPEG capture.
MSI's Afterburner and it's utilization of the MJPEG codec seems to be even slightly superior to Bandicam's implementation of it. [Hmm..something that must soon be tested!]
Click to see Full Size

The Average bitrate of the original MJPEG captures was about 30Mbps up to 70Mbps, which meant a writing stream to the disk of up to 8MB/s, which almost any hard drive can handle (recorded onto a drive capable of 150MB/s at the time).
The original generated recording files were about twice the bitrate and size of the final MPEG-4 compressed file uploaded to YouTube, the final file weighing in at about 600MB with a bitstream of 25Mbps on average (it is assumed that almost everyone will compress recorded material into a final output video compilation file of 8-20Mbps or so, for uploading to YouTube/Vimeo/etc (Blu-Ray's standard bitrate is 36Mbps and most video editing application presets go up to 20Mbps by default).
This final utilized bitrate, with the efficiency of H.264/AVC, manages to keep most of the detail that was in the original MJPEG recordings, although sadly, most of the finer detail is lost after uploading, as can be seen in the screenshot comparison below:

Originally used in an earlier article testing out MJPEG on Diablo3 with Bandicam, this screenshot shows examples of the detail loss after uploading to YouTube, when the video is played back at 1080p and 720p. Click to see Full Size 

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What was more disappointing was that YouTube feels the need to overly re-compress uploads. Much of the quality is lost, especially things like the film grain, one of the 'first things to go' in temporal video recompression. For instance, at 1:03-1:08 there is visible grain effect maintained in the settings I chose for the final compressed output file, keeping most of the grain from the original MJPEG recording from Afterburner. In the YouTube Video Player after uploading, it can be seen that much of that grain is lost. Another example of this is the dense cornfield against the much flatter sky textures at 1:30-1:36. I kept the complexity of the cornstalks and hard contrasts of the plant details versus the sky on purpose, yet after YouTube's recompressing of the video, the result is blurred and smoothed details that were not like that in the recorded MJPEG video or the final H.264/AVC high-quality video output/final compress. I will attempt other uploads of the data at various settings for experimentation and put it just below this paragraph when an upload does not lose much of the finer details I wish to share**. I understand they must do it to save space (no doubt people upload huge, 'FRAPS-original' size files and recordings sometimes), it is merely unfortunate. At least it then becomes an example of what happens to some of the quality and detail once uploaded to YouTube (the extracted frame above, for example, is from the original MJPEG recording produced by Afterburner). There seems to be no use, at this time, to attempt to upload extremely high quality/fine detail. 

 The file originally uploaded to YouTube, the results of the MSI/MJPEG Quality Test, was previously compressed with a bitrate of 25Mbps. While this bitrate, using high-quality H.264/AVC codec settings, was enough to maintain details such as Film Grain and high contrast edges, much of this detail was lost after YouTube recompressed the uploaded file. 

**Another, higher-bitrate excerpt [in an attempt to compensate for YouTube's recompression] of the original MSI/MJPEG video capture:

This video then, is an attempt to compensate for YouTube's recompression and data loss, by uploading a video stream with a very high bitrate (an average of 60Mbps, up to 80Mbps, higher even than the original recorded data). As such, the duration is much smaller, a mere excerpt of the original intended upload.

Result: Even when a video stream is uploaded with the much higher bitrate, even when the original captured file is uploaded, even when I rendered the capture to a 2160p (4K UltraHD) file and uploaded that to YouTube, YouTube's recompression of the uploaded material (while still watchable) loses far too much detail from the actual upload - at least for high-detail evaluation of a game recorder's produced video streams. This is unfortunate. For now then, I will try to always show frames (screenshots) extracted from the original captured files created by game recording applications in Quality Tests...

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Turning up the Recording Quality setting to 100%, the bitrate for MJPEG jumps up to over 275Mbps (over 30MB a second of file size being written to the drive). Quite a jump - and at that bitrate, the size becomes comparable to a YUV codec (or a FRAPS 1080p half-size recording) easily - but the quality ramps up as well. Color dithering and loss of detail is surprisingly near-negligible at 100% Quality with this game, yet the resource demand for using the MJPEG codec [especially MSI's optimization of it] seems to remain small, as MJPEG was already a lightweight codec with somewhat smaller processing being done, to begin with. Today's powerful videocards and CPU's should be capable of pumping out a sequence of lightly compressed JPEG's in a single file [no pun intended] without breaking a sweat. As long as your system isn't chugging along already, adding some MJPEG capturing shouldn't affect it very much. For those of you with slightly older systems with trouble recording in other codecs, give MJPEG a try, it should record smoother for you.

Overall, well done MSI.  /clap

If anyone is looking for a completely free Game Recording program (it might have even come on a disc with your videocard, as mine did) look no further than MSI's Afterburner. Keeping the settings relatively high [especially with the MJPEG codec, to keep compression artifacts low] and/or doing your own tests to see what looks 'good enough' for you, I suspect many people will be happy (if you aren't already) with using Afterburner and the low-resource-demanding and editing-friendly MJPEG codec to record your gaming adventures.



Please note dear reader, that I am not saying "This codec is the best one to record with" or "use this one only". I am merely showing that it is possible, or how to tweak it for quality or file size, as to your own personal tastes. There are many codecs out there to choose from when game recording and although some are more apt for certain types of games than others, overall it is your own choice to do with as you wish - do a few short tests and use what you prefer.


Have fun recording with MSI Afterburner and the MJPEG codec - and See you in the games!

[Note: As noted throughout this article, this testing of MJPEG with Hitman:Absolution alone is not a full test of MJPEG quality maintenance potential, as this game utilizes a "Film Grain" effect, which hides some of MJPEG's weaknesses in maintaining Quality. In a future post (Part II), a more in-depth examination of MJPEG as a video game recording codec, using other games and utilities, will be actualized. See you then!]

Battlefield Play4Free - First Impressions, Graphics Comparison, Tips and Brief Shotgun Gameplay/x264 Test Recording (1080p)

I recently got around to trying the 'Play For Free' version of the Battlefield series and created an account through their website to try this game out.
[I remembered much later that I actually had an account that I used during the Beta phase, but I completely forgot about that - and also what the game was like back then anyway - too much Battlefield 3 cleared all of that from my brain, I suppose!]
It is free to create an Account and play forever if you so desire, but there are also many options for purchasing weapons, armor, clothing, and other items with "Real Money".

The 4 classes available to play in BFP4F, with information on each. Click to see Full Size.

After creating a free account (which is assigned to an e-mail address), I started out playing the Medic class and it seemed to get more fun as it went along. You don't start out with paddles/defibrillators, but you do start out with a healing box that you throw down (as in Battlefield Bad Company 2), a Machine Gun (MG3), pistol (M9), Tracer Darts (a'la BFBC2) and a knife - but no grenades (yet). Running around dropping healing boxes and backing up my team was great and when I unlocked the Defibs, I felt like I was playing BFBC2. After getting used to the Controls (adjusting the sensitivity, changing some of the default hotkeys, etc) in no time it felt like good'ol Battlefield.

A hotel in Battlefield 2 (bottom) and the same hotel in Battlefield Play4Free (top)
Click to see Full Size

The visuals are akin to Battlefield 2, with extra shaders and effects mixed with some BFBC2 elements. For instance, you can 'spot' the enemy and the BFBC2-type 'triangle' appears above their head for a while and they appear on the map. The environment looks more like Battlefield 2 than Battlefield Bad Company 2, with many models (shapes) looking like they were pulled straight from BF2 and just converted. This is not a bad thing particularly, I enjoyed BF2 a lot, and with some shading, fog and other graphical boosts that were done, the game doesn't look too bad - especially when you consider it's a free-to-play title and won't cost you one cent if you don't want to spend it.

Graphics comparison between Low, Medium and High 'Video Quality' settings.
Click to see Full Size

I would have liked more complexity to many things, but it makes sense that they tried to keep the polygon/videocard usage down, supporting more types of machines/older ones, so that more people could play it (and they could also potentially make more money). It does look very playable, especially if you can turn things up a bit, and the gameplay is still The Battlefield Formula, which meant soon I wasn't paying attention to the graphics at all - I was too busy capturing points, driving teammates around, an' killin' an' healin'.. If you like the Battlefield style of gameplay, especially Battlefield2, you should enjoy playing this game.

Unlabeled comparison of that apartment complex that is forever under construction.
Click to see Full Size

The starting guns for the Medic were low accuracy and low damage and you will get killed a lot in direct firefights, but with some practice with short bursts and aiming down the sights, you can still kill others, even at a distance, and slowly start to make points. The starting rifle for the Sniper packs more of a punch of course, but seems to take forever to reload and has bullets that must be made out of solid granite, because they seem so heavy and drop so much. The starting guns for the Engineer was an RPG and [what I found to be,] a decent sub-machine gun (I have always been a fan of the PP-2000 though, I remember fondly running around in Bad Company 2 with Magnum Rounds in one /evillaugh). Recoil is high on these beginning guns, but I assume it gets better later on as more becomes unlocked at higher soldier levels. Grenades don't seem to go straight all the time, in random throws, which makes for some tense-but-funny bounces.

Although the PLAY NOW buttons will get you into the thick of battle very quickly, you cannot choose what game mode to play (Rush, etc). If you want to choose what game type to play or what server to play on, there is a server browser [indicated in the picture above with green arrows] button in the upper-right corner of the Launcher.



I found at the website, after logging in that there was a 'Starter Pack' for each class, a sort of 'preview' of a couple weapons that you can buy, which included a high-damage shotgun in it for my Medic. That was a lot of fun, if you don't mind having to run-and-gun into the frays, but it only lasted one day, then the gun disappears and is no longer usable anymore. Still, it was a nice little preview and I got some fast close-quarter kills with it while it lasted (see Video).

As with most online games that can possibly make money from you, the levels come fast at the beginning to get you hooked, then slow down quite a bit (I found it started to 'feel slow' around Level 6 or 7). You can purchase eXPerience boosters and as you level you can purchase more weapons as they become 'unlocked'. You gain free tokens called Credits as you play the game, but gain them slowly (automatically over time it seems, based on Time Played) and these Credits purchase weapons that [mostly] last one day (or items that have limited numbers of uses, such as healing bandages). You can purchase tokens called Funds ("Play4Free Funds", which used to be called "Battlefunds" during the Beta) with Real Money that you can use in the Store to purchase weapons as well, including versions that last forever.  If you are willing to purchase Play4Free Funds, you can also unlock weapons and items 'early' with them, that is, be able to purchase/unlock and equip items before the level you would normally have to be to unlock and use them.

Shotgun trial (not that kind) and the hotel from BF2.
Click to see Full Size

For the shotgun that I mentioned earlier, using these Play4Free Funds purchased with Real Money, it would cost about $.06 to use for a day and about  $1.00 to use forever. If you didn't want to spend any money for it, it seems that you can gain enough free tokens (Credits) to buy it for a day of play in about 5 or 6 rounds if your team is winning matches (about an hour of solid playtime) and just over twice that amount if your team is constantly losing matches. There was a sub-machine gun (a UMP-45) that was in the Engineer Starter Pack as a preview, and as another example, for that gun to use for one day, you would have to play about 5-6 rounds (each round lasting about 10-15 minutes) if you won most of them, and play about twice that long if your team kept losing. You can even purchase this gun (the UMP-45) to use forever with free tokens, but you would have to play about 4 hours a day for over 3 weeks and not spend much of the earned Credits on anything else. Quite a run, but if you are having fun playing the game anyway (and for free) the fact they give the option to purchase it that way is nice.

There is a Training section [the button is indicated in the picture above with green arrows] with trees and abilities to unlock for your soldier in order to drive vehicles, etc. For example: Medics do not start out with Defibrillators and must train for the equipment to revive fallen teammates.


You gain Soldier eXPerience by killing, capturing points, healing, etc and the XP gains you Levels, which unlock future items and weapons and each level gives you a Point that you can spend in MMORPG-style 'Talent Trees', where you can improve aspects of that Soldier or unlock different abilities, such as the ability for people to Spawn off of you or sense what direction damage is coming from (it doesn't do that at first), the ability to lay Claymores (and the ability to not trip them when you run by), fly vehicles and more. Thus, the more you contribute to your team by killing, capturing and healing, the more abilities to do these things you unlock. With the free Credits you gain over time as you play, the more you play, the more weapons and items you can unlock. The whole system encourages involvement and seems to work well, as there has only been a couple of games where I saw "AFK'ers" (people who have the game running but are Away From their Keyboard or not playing/helping). There were also a couple games where people said in Chat for others to "come stat-pad with them" (I left those games); but as I said, these were only a couple of games out of the 50+ I have played so far. Overall, everyone seems to be runnin'-n'-gunnin' and helping out their team just fine.

Soldiers supporting each other in a corner battle behind buildings.
Click to see Full Size

The sound in the game has differing cracks and booms for the various weapons with echo effects (Reverb) when you are inside buildings,etc and the vehicles each have their own engine sound [although there is some 'vehicle engine sounds' in the backing/environmental track that play in the background of each map (such as the rain and birds in jungle maps) that is somewhat confusing at times if your ears catch it in the background, you think a vehicle is nearby and it isn't]. I still laugh once in a while playing because every soldier uses The Wilhelm Scream. Nice. Most of the Voice Overs in the game sound like they came from BFBC2 but are tweaked a little. [The phrase when gaining control of a point still cracks me up, as it sounds like an old Clean & Clear commercial ("clear and under control.."), just like it did in BFBC2]. With the Communication Rose (Hotkey 'Q' and you choose an option, like Need Ammo) you can hear yourself and other Soldiers, but it's rare to hear someone spamming it.

 If you are having trouble hitting the numbers for the different weapons and slots, or just want to change them, you can assign other keys for them in the Game Launcher under Settings (the gears button at the top). I liked to assign the numbers for items only, so my weapons are actually Spin Mouse Wheel Up for one and Spin Mouse Wheel Down for the other.


The music, which doesn't play during regular gameplay, is a nice hard-rock/heavy-metal take on the BF theme by Corroded. A looping 2-minute track called Age Of Rage plays while you are in the Game Launcher menu that sounds a lot like the music from The Terminator movies (not a bad thing). Short phrases from their version of the theme play when you Win, Lose or Level Up and a longer version plays while Loading. The hard-rock sound fits the game well.

Always take time to enjoy the scenery in life. Here are some trees and shadows.
Click to see Full Size

Overall, Battlefield Play4Free is like most free-to-play online games that use Microtransactions: it is in fact free to download, install and play and there is also the ability to purchase items and 'boosters' to level up/unlock items faster as well - but you don't need to spend any money on it at all if you really don't want to or cannot do so (and of course have the time to play to get what you want the slower/free way). Although it feels a little clunky to play at first if you're coming from the Retail versions of the Battlefield series, once you get used to the DirectX 9 graphics and mechanics, it eventually 'feels' like a Battlefield title (A Good Thing) and once you get used to it overall - it is a lot of fun to play (The Main Thing).

I almost forgot.. the gameplay video!  This clip was a test of a few things at once; Bandicam's 'External Codec' setting using x264 (H.264/AVC) available in version 1.8.2/2012-09 [new version at the time writing this post began] and higher, Bandicam's automatic Logo overlay with transparency (our logo, lower right corner), BFP4F's one-day-only 'Starter Pack' 870 Combat Shotgun, and the uploading of a clip directly from the recorded file/output to YouTube.
Enjoy!

Video Specs and Tech Talk:

Recorded game: Battlefield Play4Free, Online FPS
Recorded with: Bandicam Registered Version @1080p
Recording codec: x264 (H.264/AVC) using the 'External Codec' implementation in Bandicam
Recording settings/variables: 'VeryFast' Preset, CRF23, 'Zero-Latency' Option selected, Logo option with transparency (our logo, lower right) 

The first of many recordings testing out Bandicam's usage of other codecs installed in a system (called 'External Codecs' in the program), this clip was recorded using the x264 Advanced Video Coding codec. Not an editing-friendly codec (it is slower to seek/move between sections within an editing application and can have artifacting issues), it still manages to work well with little effect on framerate, with the proper settings. The Constant Rate Factor quality setting of 23, recording at 1920x1080, gave an output bitrate of about 20000kbps, resulting in a file size that uses about 150MB per minute of recording (a half hour of recording at this resolution and bitrate [with MPEG-4/AVC] would take up about 4.5GB). 

The 'VeryFast' Preset in x264 auto-selects a few things, such as 1 reference frame per GOP, no Trellis encoding, no Deblocking, no CABAC and no B-type frames in the original recording/output. I suggest the faster Presets, as the slower ones compress far too much on-the-fly and create lag in the game and in the recording - more on this will come in a future article**. The CRF set at 23 allowed some 'breathing room' for recording and compressing on the fly (it is a medium quality setting, a CRF of 18 being more of a 'standard high-quality' MPEG-4 setting), it also saved a little bit of disk space as this just-over-two-minute file was only about 300MB. While still watchable and acceptable in quality, the absence of deblocking (to hide macroblocks and other compression artifacts) and the high compression of flat/low-detail areas, making them smoothed out/blurred is visible, however. It is suggested to use a higher bitrate/rate control factor (if the system can handle it), even though more diskspace will be utilized. Youtube seems to have recompressed it as well, as even at the '1080p' Youtube setting, some quality has been lost from the original uploaded file. Still, it seems acceptable for a medium quality recording setting.

**A separate article/post testing out and explaining recording with h.264/AVC (MPEG-4 Part 10) in detail, for use in programs like Bandicam, Dxtory, MSI Afterburner, etc. can be found here at this blog: http://gametipsandmore.blogspot.ca/2013/05/game-recording-with-mpeg-4-using.html

Have fun and See You In The Game!