Optimal recording in 3D help.
I haven't experimented with recording of gameplay in 3d till now and going to be attempting it. I would appreciate any help or suggestions in recording quality movies while maintaining good compression. This is mainly because I will hosting it on my own server($).
I haven't experimented with recording of gameplay in 3d till now and going to be attempting it. I would appreciate any help or suggestions in recording quality movies while maintaining good compression. This is mainly because I will hosting it on my own server($).

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#1
Posted 02/23/2012 12:06 AM   
Well, I've been recording with FRAPS then compressing with ffmpeg using the following in a batch file:

D:\Programs\FFMpeg\bin\ffmpeg -i %1 -b:v 9999k out9999.avi

Most of the time I have to record at half resolution. If I record at full resolution then I hit the 4-gig barrier after about a minute and FRAPS starts a second file. If i had some good movie edit software then I could string the two together but all I have is the Microsoft Movie Maker. I used DivX compression and got so-so results with Movie Maker but it seemed to somehow mangle the NVIDIA 3D Vision Video Player until I uninstalled DivX again.
Well, I've been recording with FRAPS then compressing with ffmpeg using the following in a batch file:



D:\Programs\FFMpeg\bin\ffmpeg -i %1 -b:v 9999k out9999.avi



Most of the time I have to record at half resolution. If I record at full resolution then I hit the 4-gig barrier after about a minute and FRAPS starts a second file. If i had some good movie edit software then I could string the two together but all I have is the Microsoft Movie Maker. I used DivX compression and got so-so results with Movie Maker but it seemed to somehow mangle the NVIDIA 3D Vision Video Player until I uninstalled DivX again.

#2
Posted 02/23/2012 03:13 AM   
Virtual Dub makes it easy to attach two files together. You just want to make sure "full stream copy" is selected in the video pulldown menu before finishing.
Virtual Dub makes it easy to attach two files together. You just want to make sure "full stream copy" is selected in the video pulldown menu before finishing.

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#3
Posted 02/23/2012 06:09 AM   
Staxrip is a great, free program that allows you to stitch together multiple FRAPs videos and also encode/compress to different formats: http://staxmedia.sourceforge.net/

It also lets you manipulate aspect ratios and output formats for 720p FP friendly uploading to Youtube for HTML5 viewing.

I tried Virtual Dub in the past and while it does work and gives you a great deal more flexibility in terms of video editing, I had issues with its audio output codecs when uploaded to Youtube. Windows Movie Maker isn't a bad option either, very simple to use but you are greatly limited in terms of encoding quality and output resolution.

As for recording, I still use FRAPs and try to record in full-resolution 1080p then compress it down. The difference between full-res and half-res is very noticeable even after compression, but full-res recording is extremely bandwidth/seq. write dependent and is also incredibly storage space intensive. I'd say you need ~450-500MB/s to record 1080p 3D at close to 60FPS; the RAID0 array I write to for FRAPs videos only manages ~300MB/s on a good day, so I only get 35-40FPS in 3D when recording to it.

FRAPs recording is also very CPU and to a lesser extent, GPU intensive, so in some games that require the extra CPU cycles, it will drop your FPS while recording. There used to be a bug too where FRAPs recording in 3D didn't work with SLI, but this has been fixed at some point (I've verified with R295 for sure), and the 2nd GPU can really help framerates while recording in some games.

If you can't get good framerates at 1080p with your HDD or GPU config, I'd say you're better off dropping down to 720p and using full-resolution recording rather than 1080p and recording at half-res. LMK if you have more questions.
Staxrip is a great, free program that allows you to stitch together multiple FRAPs videos and also encode/compress to different formats: http://staxmedia.sourceforge.net/



It also lets you manipulate aspect ratios and output formats for 720p FP friendly uploading to Youtube for HTML5 viewing.



I tried Virtual Dub in the past and while it does work and gives you a great deal more flexibility in terms of video editing, I had issues with its audio output codecs when uploaded to Youtube. Windows Movie Maker isn't a bad option either, very simple to use but you are greatly limited in terms of encoding quality and output resolution.



As for recording, I still use FRAPs and try to record in full-resolution 1080p then compress it down. The difference between full-res and half-res is very noticeable even after compression, but full-res recording is extremely bandwidth/seq. write dependent and is also incredibly storage space intensive. I'd say you need ~450-500MB/s to record 1080p 3D at close to 60FPS; the RAID0 array I write to for FRAPs videos only manages ~300MB/s on a good day, so I only get 35-40FPS in 3D when recording to it.



FRAPs recording is also very CPU and to a lesser extent, GPU intensive, so in some games that require the extra CPU cycles, it will drop your FPS while recording. There used to be a bug too where FRAPs recording in 3D didn't work with SLI, but this has been fixed at some point (I've verified with R295 for sure), and the 2nd GPU can really help framerates while recording in some games.



If you can't get good framerates at 1080p with your HDD or GPU config, I'd say you're better off dropping down to 720p and using full-resolution recording rather than 1080p and recording at half-res. LMK if you have more questions.

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#4
Posted 02/23/2012 08:00 PM   
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