[Kdenlive-devel] AVCHD

Tue Feb 7 19:13:41 UTC 2012

Hey there - again.

I recently got the SVN-PPA for Ubuntu of KDEnlive and the current version of KDEnlive. I might repeat myself - but it's still not really usable for me. The recording option ... I think it works with Terratec Grabby (Video4Linux2) - why don't you let the user freely decide the codecs and formats in which he wants to record.??

And the second point: AVCHD. (H264). I always record in H264 for it resulting in smallest filesizes with high CPU Load while decoding. :D I see it's a pretty hard video codec, but as far as I unterstand it there is one image fully defined and then only the changes based on the one full picture. If there is a change, that is too big or o heavy there will be another full frame. (i-Frame (????)) I see that even Adobe Premiere has its problems with this codec, but it is in my humble opinion the best one for sake of my harddiskdrives. Adobe (apparently) searched bad to the last i-frame and builds all later changes on top of it ... so it is pretty slow loading a random position in a video. But KDEnlive is too slow to accomplish a nice editing envirornment. The video in Timeline is too slow --- for 5 seconds then there is ja jump to the real position after the 5 seconds. I can understand it hanging for a while, when I clicked on a later point in time ...
 searching for last iframe ... but if it is always so slow... that's just unusable ... I hope this critics are not taken personally - And maybe I helped you to make an even better editing experience for video cutters all around the world. ;) (nice sentence, ain't it)

Regards Stefan Naumann
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