alright so i have been editing the native footage from my t2i without problems for weeks now using vegas 9. tonight i go to start a 1080 24p timeline, i import some t2i footage and put it on the timeline, and when i play it i cant see the video but i can hear the audio. i tried all kinds of project settings (720 24p, 720 30p, 1080 30p, 1080 60i, SD, etc) with the same results. i even started a SD projects and put an SD clip in it to see if that would work and it played fine. to make sure this was not a computer issue i opened premiere pro and put a clip from the t2i on a timeline and it played fine. so basically vegas wont play HD for me anymore. why is vegas doing this all of a sudden and what can i do to fix it? hopefully i just accidentally pressed something. any help with this would be awesome as i will be stressing out over this until its fixed.

do you have itunes installed on the PC?

i have been editing the native footage from my t2i without problems for weeks now using vegas 9. tonight i go to start a 1080 24p timeline, i import some t2i footage and put it on the timeline, and when i play it i cant see the video but i can hear the audio.

Most likely you have got quicktime updated, if using Vegas 9.0c, you need to have a quicktime version prior to 7.6.6, otherwise get Vegas 9.0d which works with quicktime 7.6.6.