Re: Bad preview of 4k video
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 made sense for the big houses like Google to pay the people that are smart enough to develop a library for encoding video. For the mathematics involved in merging various effects per frame in video, you need different libraries. There was an attempt to use some of the accelerations available on a GPU with the movit project. Unfortunately it is so unstable in Kdenlive that it crashes out on my system in minutes. I'll enable it from time to time to see the progress on the project, but for any serious editing it's turned off on my system. This might break your heart, applying effects is not even properly multi-threaded. You can set the number of threads higher for the effects, but there are some concurrency issues and if your effect stack depends on the effects being applied in a certain order you will see some weird visual effects. You might think about just dropping the preview resolution until you can apply the effects smoothly, do your edits and let the system render the high resolution stuff at some later time when you can be doing something else. Evert Vorster Awesome Chapters Tours http://www.awesomechapters.com Tel: +264 (0) 811477690 On Sun, 28 Jun 2020 at 17:45, Mehdi Haghgoo wrote: > 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 > 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 Tours > http://www.awesomechapters.com > Tel: +264 (0) 811477690 > > > On Sun, 28 Jun 2020 at 14:24, Camille Moulin > 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 > > >
Re: Bad preview of 4k video
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 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 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
Re: Bad preview of 4k video
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. (See attachment) Cheers Em dom., 28 de jun. de 2020 às 11:48, Evert Vorster escreveu: > 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 Tours > http://www.awesomechapters.com > Tel: +264 (0) 811477690 > > > On Sun, 28 Jun 2020 at 14:24, Camille Moulin > 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 >> >> >> -- .1010.r.i.1101|n.o.i.s.1110|i.m.1010.g.1110|مقاومة fsf member #5439 usuario GNU/Linux #471966 |_|0|_| |_|_|0| |0|0|0| http://www.gunga.com.br;>gunga http://www.tempoecoarte.com.br;>tempoecoarte http://www.atelier-labs.org;>atelier-labs http://www.mocambos.net;>rede mocambos
Re: Bad preview of 4k video
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 Tours http://www.awesomechapters.com Tel: +264 (0) 811477690 On Sun, 28 Jun 2020 at 14:24, Camille Moulin 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 > > >
Re: Bad preview of 4k video
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 >
Bad preview of 4k video
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, it is all free and fullfeatured. It's ridiculous that Lightworks Free version only allows h264 and up to 720p export! 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
