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The Woes of G2M3

Saturday, February 21, 2009 by Dereck Martin
For those that do not know, G2M3 is a special video codec used by GoToMeeting and GoToWebinar for recording.  It is only playable in Windows Media Player and there is suppose to be a plug-in for Quicktime under MAC.  It has caused so much frustration these past few weeks in a task I was assigned.

We implemented a new video help section, and we had an archive of old GoToMeeting recorded sessions.  The videos were all in WMV format utilizing the G2M3 video codec.

None of the video converters available for WMV to FLV (flash video) could handle the video codec properly.  Most would fatally crash.  That is where the adventure began in finding a way to convert G2M WMV video files into something that was more exportable.

The first thing I tried was ffmpeg since it can handle almost anything.  It failed immediately when trying to convert it.  At least it was nice enough to give me a reason why.  It said the video stream was unsupported.

Stream #0.2: Video: G2M3 / 0x334D3247
 

After trying several converters, I had almost given up.  Until I dug deep into Google searches and came up with a post that shed some light on how to fix the problem.  It appears the most converters do not interface with some back-end Windows Media Player functionality to decode the video of some WMV codecs during conversion.  I did find something that did, and that was a utility called Windows Media Encoder.

WME was designed to stream Windows Media out to a Windows stream sever, but it can re-encode WMV using standard Windows Media 9 video and audio codecs.  It is also free download and use.

This was not the end of journey for this task. The FLV converter we use does apparently support one of the Windows Media 9 codecs.  It supports newer WMV codecs, just not the old codecs.  I had to re-encode the WMV to another more suitable format. 

I chose to just convert the WMV into MPG with the aid of TMPEGenc.  This software is also free to use as long as MP2 encoding it not the main goal.  After all these old video files were converted to MPG format, our FLV converter worked.

The lesson in this situation is to set the GoToMeeting settings to record in standard WMV format not the Default G2M3 Format.  After testing, I found out the standard WMV works fine with our FLV converter.

I hope this helps anyone out there who plans on using G2M for any sort of video tutorials in SWF or FLV format.  I should also note that Citrix is aware that the G2M3 is incompatible with Linux and any Windows or Mac box that does not have this codec installed.  Keep that in mind when you use the product.


Comments for The Woes of G2M3

Friday, March 13, 2009 by Neil Elver:
Thank you so much for taking the time to write this up! I was having the exact same problem and after trying a handful of converters and codecs I found your site right before giving up - and it looks like TMPEGenc is working! Thanks.
Monday, March 30, 2009 by Sandy:
Great post!! I was having the same problem where the G2M2 format block me from converting to other formats. I am trying your format now, but it takes so long to convert one video to flash file. Does it happen to you also? At the moment, my conversion is wmv -> wmv -> mpg -> flv Am I doing it correctly??
Monday, March 30, 2009 by Sandy:
Weird, my last comment doesn't show. Please forgive me if I double comment. I came across your post when I was getting fed up with all these useless file conversions. I am following your format but somehow TMPEGenc is taking like an hour and more to convert to mpg. Is there anything I can do to shorten conversion time? The problem is I have quite a few videos I need to convert and scared it will take me days to finish. Can you please help me?
Thursday, June 18, 2009 by Mario:
Thanks man! I was starting to pull hairs off of my head. Cheers.
Monday, June 29, 2009 by Jon:
Great Post...TMPEGenc in the key! It looks like its working. A nice fix since GoToMeeting tells you your SOL if you record the file in G2M3 and need to share it. Thanks!
Tuesday, August 4, 2009 by krishnadas:
thanks
Friday, August 7, 2009 by Aman:
Dereck, YOU ARE THE MAN!
Monday, August 24, 2009 by zac:
wow. thank you so much. i've been doing so much crap to try and get a g2m3 video converted to an mpeg (or absolutely anything but a g2m3 wmv). i even recreated a client's powerpoint webinar using the audio from the actual wmv and converting the slides to jpgs and reanimating everything. what a joke! this is excellent. i used to use tmpgenc a long time ago but completely forgot about it! windows media encoder and tmpgenc to the RESCUE!
Tuesday, September 1, 2009 by Derek Martin Mosley:
Dereck, your second-to-last paragraph sounds as though I don't have to go through multiple conversions (G2M default > WMV > MPG > FLV), but can convert directly by using the FLV converter you're using (G2M's WMV record option > FLV). Correct? If so, what FLV converter are you using?
Tuesday, September 8, 2009 by Dishon:
Hey I really appreciate your information but can you tell me where I can go to get the free downloads? Thank you
Wednesday, September 9, 2009 by Dan @Broox.co.uk:
Hi Guys This has been a life saver for me - I've spent hours searching for a way of converting G2M3 to 'any other type of file'! Windows Media Encoder, although slow, looks like it may do the job. Personally for converting to FLV (or almost anything else) i use SUPER video converter which also accepts standard WMV files. Anybody requires it drop me a line at daniel@broox.co.uk and I can send you a link. Hope this has helped somebody!

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