So there are 2 problems I am facing.
(1) Export hangs.
(2) If QT renders but no audio.
The audio-video export hangs around specific seconds (not exact frame) but within 2 seond range.
There's a PSD on timeline around that timeframe. I removed it and tried rendering without it. Didn't help.
Switched off all audio and tried export - i still hangs.
I copy the sequence, create a new premiere project, paste the copied sequence and exported to QT (both audio-video).
The export goes successfully - does not hang, however QT does not have any audio.
Then I try export again from this new premiere file, with the same settings, the export hangs around the same area as before.
I tried creating a new premiere file with copied sequence three times - it's the same thing - export goes through first time, but does not have any audio. And export hangs after first time.
After trying many different things - creating new projects, new sequences, eliminating one asset at a time to find if the problem was in some asset, clearing cache, unchecking the write XMP when file is imported box in preferences/media - I was finally able to render the video + audio successfully for that one project. I believe the problem was with two audio files. Here's what worked:
1) Clear cache
2) Uncheck "write XMP..." in preferences/media
3) Quit premiere pro
4) Copy the 2 audio files in a different folder and change the file name
5) Restart premiere and open the project
6) Replace footage file by linking the 2 audio files to files on new location
7) Save project
i suddenly ran into the same (or a similar) problem within premiere cs 5.5:
copied a sequence to clipboard, opened a new project, pasted into a new sequence, took that sequence and used it in another sequence. for those who wonder why i do it this way: the copied an pasted sequence is an intro (i will call it "intro" sequence). i wanted to reuse this sequence in a simple way in many projects (i will call it the "cut" sequence)...
while audio played back fine in the timeline, it was not exported. i recognized too, that the waveform was not displayed in the timeline of the "cut" sequence.
BUT: i found a solution that worked for me
simply click "sequence->render audio" in the "cut" sequence before exporting. after that, the waveform will show up in the timeline and audio will export the way expected!
Yes, problems with Copy/Paste do crop up, and usually with the Audio. This thread: http://forums.adobe.com/thread/1100893?tstart=0 is but an example.
My remote guess would be that something causes the Clip's reference to un-link from the necessary CFA, and PEK files, that are created in the Media Cache, when the Conforming process is run at Import.
In my readings, and personal observations, the problem is not constant, and seems to crop up, rather randomly - even working fine for awhile, and then surfacing later, rather than instantly, upon Paste, all the time.
Glad that you got your issue handled, and thanks for reporting on how you cured it.
This is now august 2014 !!! Almost two years after this problem was reported. I'am trying a CS6 thing and never had this problem until now when I dropped what seems to be a killer issue: 3 different sources of digital files into one sequence. I never used different cameras, but I received some full HD files. One audio only from Zoom recorder (was 1,411 kbps...), one AV Quicktime mov from a Cannon EOS 70 D and one AV MTS AVCHD from a Sony PMW 100.
The report is the same: no problem importing and editing but no way to export audio, neither only in wav or mp3, neither with the video. As people noticed, unmarking "export audio" your video edition was exported as ever.
No hardware issue too, as things evolved form 2011-12 and now I'm using I7 with 8 fast cores, 8 GB DDR3, SSD SATA 3 hard drive only for editing, and a 960 cuda cores Video Card. So, all the previous "weak hardware" and "re install" things were WRONG!
thyl0r's reply is the only correct thing at this issue. I tried others (no re install, of course) and they failed. I made the - simply click "sequence->render audio" - and my despair vanished in less than a minute. This answer has to be incorporated to Premiere's FAQ. Thank you thyl0r whoever you are.