Bad preview of 4k video

[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 platforms like mobile, Desktop, etc. because of different GPU architectures.  Any thoughts? 

- mehdi 
 
  On Sun, Jun 28, 2020 at 19:18, Evert Vorster<evorster at gmail.com> wrote:   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 540p for my monitor. This is near VHS quality, if you are old enough to remember that format.
Proxies are lower resolution copies of your original footage that Kdenlive can create automatically, and represents another level of smoothing of the editing process on older hardware. Unfortunately proxies create all sorts of problems in Kdenlive. Drawbacks include extra disk space used as well as the time it takes to generate. For your own sanity, please avoid using proxies if you can. 
Kind regards,Evert Vorster
Awesome Chapters Tourshttp://www.awesomechapters.comTel: +264 (0) 811477690


On Sun, 28 Jun 2020 at 14:24, Camille Moulin <camille.moulin at free.fr> wrote:

  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 GPU, but this is quite a large task and needs also to be implemented at MLT's level. Cheers, Camille 
   
  
  On 28/06/2020 13:05, Mehdi Haghgoo wrote:
  
 [...] I have a small problem though, Kdenlive is bad at previewing in-edit tracks especially for high-res videos like 4k and when layering multiple tracks. It just plays with a lot of hiccups. I have low end laptop: core i5 6200u dual core with Intel 520 graphics. Is there a way to improve the performance in future versions or are there any plans?  I have not tried kdenlive with a discrete graphics. Maybe, these issues are not present on powerful systems.  
  
 

 
 

 
 
 
  
  Again thank you for your great work. I would love this message to be seen as a query and suggestion at its best.  
  Looking forward to hearing your thoughts.  
  
  Best regards - mehdi 
  
 

 
 
  
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