Re: Bad preview of 4k video

2020-06-29 Thread Massimo Stella
Hi Mehdi, I remind you that you can render the timeline preview for the zones you need to get a perfect smooth playback before to export  (as you have to do if you use application like Avid, Premiere and FCP.) If you check you'll find that this feature is available on Lightworks too but only fo

Re: Bad preview of 4k video

2020-06-28 Thread Evert Vorster
Hi there, Mehdi. MLT does use some GPU accel, and I have some scripts for the encoding of x264 and x265 video in kdenlive. The thing about GPU acceleration is that someone has to write the module in the low level language that a GPU understands. As there are a lot of people re-encoding video, it

Re: Bad preview of 4k video

2020-06-28 Thread Mehdi Haghgoo
Thanks Evert, I have not used proxies, but as I understand from your comment, it would not do much good for me here.  One more thing Camille, do you mean MLT does make zero use of GPU for video processing? If so, this seems quite a drawback, but then adding GPU might be extra work on different p

Re: Bad preview of 4k video

2020-06-28 Thread farid abdelnour
Hi To third Camille's suggestion I also recommend to reduce the preview resolution. Ever since that feature was introduced I stopped using proxies. I can't recall a bad experience with proxies besides the disk space, fortunately for 20.08 JBM added an interface to manage the generated proxies. (Se

Re: Bad preview of 4k video

2020-06-28 Thread Evert Vorster
Hi there, Mehdi. To second Camille's suggestion, the first thing to try would be to lower the preview resolution. This setting does not affect the rendered video, but does provide a much smoother editing experience on older hardware. When editing 4K footage on my machine, I use a resolution of 540

Re: Bad preview of 4k video

2020-06-28 Thread Camille Moulin
Hi Mehdi, Thanks for the  kind words about kdenlive :-). About your performance problem, on short term you can try to lower down the preview resolution (in the lower left corner of the monitor, see picture attached.)or you can enable proxies. On the medium/long term, the goal is to be able to use

Bad preview of 4k video

2020-06-28 Thread Mehdi Haghgoo
Hi First of all, I know that Kdenlive is a great piece of software and I appreciate the hard work put into it in the past and at present. I have done some video manipulation with ffmpeg and I know video editing software is a big deal. Also in comparison with other Linux software like Lightworks,