My laptop is, I think, not a small one: an ASUS K70AB series with Athlon 64 QL65, 500 GB hard drive and 4 GB of memory. My camcorder is a Canon HG20 HD and I was very pleased with both until I wanted to edit my videos. Even with Openshot it seemed to be difficult, what is confirmed in dozens of forums. I have had extensive contact with a French Openshot expert, the friendly and very helpful Cenwen, who advised me to wait eventually for EKD 2.0 what will contain a AVCHD converter. EKD 2.0 is still not out and the former Ubuntu synaptic version is in French, but I do not understand French. Open Shot is fortunately included in Ubuntu synaptic now, but MTS files placed on the time-line to edit are still not good: the videos are "stuttering", run in, fits and starts, probably - somewhere - a lack of capacity and, perhaps, initiated by Ubuntu.
What is possible with Openshot is to put the MTS files on the time-line and to render the time-line content into many different video file formats. OpenShot will be used as a video converter only. I have tried it and the resulting MP4 did not stutter. The new MP4 file can be loaded into Openshot again, with all the possibilities of Openshot: smoothly flowing to manipulate and to edit. If multiple MTS files are placed on the time-line, those files become joined while rendering (converting). The extra converting phase cost extra time and (temporary) storage of course. The extra time seems (unmeasured) shorter than the time for indexing with Kino before, for my old digitised video camcorder tape files.
Probably this trick works for all variants AVCHD how could be opend with Openshot. I'm convinced about Openshots capabilities now and I will make my donation very soon!
Very much thanks to Cenwen too, of course!
If this tip - for some reason - do not belong to this forum, I hope that someone remove this tip to the right place.
Sorry for my poor English!