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Convert any 3D video to 3DS format
Posted by Nathan on Wed, December 7th, 2011 at 20:35 - 117 Comments

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Nathan

Convert any 3D video to 3DS format
Watch movies on your 3DS!

spinal, known from popular DS(i) homebrew applications and games such as Spike Dislike DS or the DSi Homebrew Channel, has figured out the 3DS's video format, so now you can watch any video you want on your precious 3DS. Check out the spoiler below to find out how.

UPDATE: SifJar has created a small GUI tool for this procedure, but beware, as it is still in beta phase and there may be bugs. Download link can be found below.

spinal

OK, having updated your 3DS no doubt you'll want to watch videos on it in 3D. So, here's how

The 3DS video format is a simple avi with two mjpeg video streams and a single ima adpcm audio stream, with a resolution of 480x240. You can convert to it with the following instructions...

Download or rip your 3D video (youtube has millions of them by now)
Download ffmpeg.

run the ffmpeg with the following options (assuming that your video is called "video.avi")

If your 3D video is top-bottom format -

Code
ffmpeg -y -i "video.avi" -s 480x480 -aspect 2:1 -r 20 -vcodec mjpeg -qscale 1 -vf crop=480:240:0:0 -acodec libmp3lame -ar 44100 -ab 96k -ac 2 "left.avi" ffmpeg -y -i "video.avi" -s 480x480 -aspect 2:1 -r 20 -vcodec mjpeg -qscale 1 -vf crop=480:240:0:240 -an "right.avi"

If your 3D video is side-by-side format -

Code
ffmpeg -y -i "video.avi" -s 960x240 -aspect 2:1 -r 20 -vcodec mjpeg -qscale 1 -vf crop=480:240:0:0 -acodec libmp3lame -ar 44100 -ab 96k -ac 2 "left.avi" ffmpeg -y -i "video.avi" -s 960x240 -aspect 2:1 -r 20 -vcodec mjpeg -qscale 1 -vf crop=480:240:480:0 -an "right.avi"

After a short time, you should have "left.avi" and "right.avi". It is now safe to move continue...

note - if the filesize is too large, you can adjust the quality by changing the "-qscale 1" to a different number, 1 - best, 31 = worst.

run ffmpeg with the following options to create the final movie file...

Code
ffmpeg -y -i "left.avi" -i "right.avi" -vcodec copy -acodec adpcm_ima_wav -ac 2 -vcodec copy -map 0:0 -map 0:1 -map 1:0 "VID_0001.AVI"

You can change "VID_0001.AVI" to a different filename if you like, but it must be LLL_NNNN.AVI to show up on the 3DS.

Once that's done, copy it to the folder on your SD card that all of your photos are stored in and view it in the photo viewer.
*update Some people wanted a 2D version also, so here it is, just a single step for the 2D version

Code
ffmpeg -i "video.avi" -s 480x240 -aspect 2:1 -r 20 -vcodec mjpeg -qscale 1 -acodec adpcm_ima_wav -ac 2 "VID_0001.AVI"

3DS Video 0.23 homepage

Source

Comment on: Convert any 3D video to 3DS format

Guy.brush

Wed, December 7th, 2011 at 20:42

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This really is awesome! Got to try it right away.

Hmm, got myself the latest Win64bit static build of ffmpeg at http://ffmpeg.zeranoe.com/builds/, but it immediately closes after opening. I think I'm going to to read some tutorials now.lol

This post has been edited by Guy.brush, Wed, December 7th, 2011 at 21:22

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Comment on: Convert any 3D video to 3DS format

wiimancj

Wed, December 7th, 2011 at 21:58

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This seems pretty cool.
Have any of you tried it?

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Comment on: Convert any 3D video to 3DS format

Guy.brush

Wed, December 7th, 2011 at 22:12

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I'm getting there, slowly. Been a while since I used command prompts. Feels like pre-Windows times. Yay

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Comment on: Convert any 3D video to 3DS format

jarathaxe

Wed, December 7th, 2011 at 22:18

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I downloaded the recent build, but cannot seem to get the converter to function either.

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Comment on: Convert any 3D video to 3DS format

wiimancj

Wed, December 7th, 2011 at 22:18

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sweet. let us know how 3D porn looks like on a Nintendo device

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Comment on: Convert any 3D video to 3DS format

Nathan

Wed, December 7th, 2011 at 22:20

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SifJar on GBAtemp has created a little GUI tool to do this, you can download it here.

@wiimancj: lmao!

Quoting: Comment on: Convert any 3D video to 3DS format

Guy.brush

Wed, December 7th, 2011 at 22:22

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jarathaxe on Wed, December 7th, 2011 at 22:18 GMT
I downloaded the recent build, but cannot seem to get the converter to function either.

Open command (the DOS style window, I don't exactly know how it's called in english, think it's command), then go to the folder your ffmpeg.exe is in by climbing the folder structure with "cd Foldername" until you're there, then insert the code spinal posted.

edit: sniped. Yeah. The GUI version should be much easier to use.

This post has been edited by Guy.brush, Wed, December 7th, 2011 at 22:39

Reason: clarification

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Comment on: Convert any 3D video to 3DS format

Crig_tumblr

Wed, December 7th, 2011 at 23:08

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so cool :p

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Comment on: Convert any 3D video to 3DS format

Guy.brush

Wed, December 7th, 2011 at 23:31

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HEUREKA! Thanks spinal. This is frickin' amazing! I converted the 1080p side by side Tintin movie trailer, worked like a charm and it looks gorgeous!

Now to get rid of that ten minute limit for vids.

This post has been edited by Guy.brush, Wed, December 7th, 2011 at 23:32

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