Thanks for reading this far.
I have som more info on this. The problem in my current configuration seems to be related to the connection between PrE and the head-set I am using.
I have a Logitech H530 USB headset which is using the drivers supplied by Windows. Logitech does not supply drivers for this. The current driver is version 6.1.7601.17514.
When I get the problem, the audio is disabled also for othe applications. If I unplug the USB cable for the head-set and reinsert it and then go to the loudspeaker icon in the lower right hand corner and click on the "knob" I will hear the normal "bing".
I can then resume playback in PrE. However, if I do not go to the speaker to get the "bing" I cannot start playback.
So for some reason, when I close a project in PrE, PrE seems to be messing up something in the audio settings of PrE itself and/or Windows, so that the USB headset gets disconnected (Why PrE - because this never happens with any other application).
Under Settings/Audio Hardware/ASIO settings/Output, the Logitech headset is enabled.
Under Settings/Audio Output Mapping, the logitech headset is selected.
When you Import those AVCHD files into PrE, and place them onto the Timeline, is there a red line above them, initially?
If there is no red line, then your Project settings are correct, but if not, then you need to investigate the your Project's setting.
When you get red lines above your Clips, say when you add an Effect, any form of overly, or Transitions, to get the best playback, you will want to hit the Enter key to Render the Timeline. However, with AVCHD, or any H.264 material, your i5 will never likely give really smooth playback, this is just too much necessary processing needed.
Also, it appears that you have but one physical HDD, and then have it partitioned. What is the speed, and size, of that HDD? Partitions will slow down the process also. See this ARTICLE.
I see two immediate problems: the i5 and the partitions, and there could be more, such as a mis-match between the footage and the Project, and possibly the speed of your HDD. For laptops, they are commonly 5400RPM, and 7200RPM is the minimum for smooth video editing.
Good luck, and let us know a bit more.
Thanks for your reply!
From my first post: "There is also a green dot in the video thumbnail in the project window. There are no other color markings or lines."
I don't know if you read my second post.
My i5 is not a problem for the simple tasks I am performing. When playback works, I have NO problems with performance.
I just use one video track, cut and trim and export to flv. Only if I start adding a second video track, I get into trouble regarding performance.
The problem is that when I close a project in PrE, for some reason my audio stops working. This will block blayback in the next project I create - until I remove and reinsert the USB cable for the headset and click on the volume lever in the lower right hand corner of the screen. I have never seen this behavior with any other application than PrE.