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4K Timelapse Questions...

Tags: 4k, 4k profile, kdenlive, timelapse 4k, 4k profile, kdenlive, timelapse 4k, 4k profile, kdenlive, timelapse
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ezergal
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4K Timelapse Questions...

Sun Oct 12, 2014 9:33 pm
Hi, i recently installed magic lantern on my camera and i am very interested in making a time lapse... so, i was thinking since the camera resolution is very high why not aiming to 4k. I've looked around but haven't found any profile for the proyect... so the questions would be is there a profile? can i make mine? (how?) and which rendering format would be the best for it?

thanks for your time!
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ttguy
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ezergal
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Re: 4K Timelapse Questions...

Tue Oct 14, 2014 12:18 am
Thanks, cheers!
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ezergal
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Re: 4K Timelapse Questions...

Tue Oct 14, 2014 12:37 am
Though... i've got another question... why there are no profiles for that resolution (4K) by default in kdenlive? (don't get me wrong, it's not the fact of making my own profile) it's just strange i think... being it a fairly simple thing to do.. perhaps could have been a new thing besides the (appreciated) bugfixes for the last release...
or there is a reason?
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ttguy
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Re: 4K Timelapse Questions...  Topic is solved

Tue Oct 14, 2014 7:20 am
The reason might be that ffmpeg/avconv/melt does not cope with that resolution very well. Just my feelings from googling a bit on this.
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Ubu the Tech Guru
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Re: 4K Timelapse Questions...

Wed Nov 12, 2014 3:54 pm
ttguy wrote:https://userbase.kde.org/Kdenlive/Manual/Project_Menu/Render#Create_Custom_Render_Profiles
do you know if threads=4 is a valid option for the encoding profiles because my kdenlive-git I am using the AUR isn't using 4 cores, it appears like it's only using 1 core. i have a thread in the rendering section about slow encoding. any help would be appreciated.


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ttguy
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Re: 4K Timelapse Questions...

Thu Nov 13, 2014 8:40 am
Ubu the Tech Guru wrote:
ttguy wrote:https://userbase.kde.org/Kdenlive/Manual/Project_Menu/Render#Create_Custom_Render_Profiles
do you know if threads=4 is a valid option for the encoding profiles because my kdenlive-git I am using the AUR isn't using 4 cores, it appears like it's only using 1 core. i have a thread in the rendering section about slow encoding. any help would be appreciated.


No I don't know anything about that really.
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Thu Nov 13, 2014 9:51 pm
Hello,

Several thread mention that: in 0.9.10 the multithreading is unfortunately disabled.

I picked many patches from movit branch that where fixing non-movit bugs, but the one on multithreading was actually disabling too many things. I will push the revert soon so that future daily builds render quickly again :-\

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Re: 4K Timelapse Questions...

Fri Nov 14, 2014 6:41 am
so would that mean that sunab's ppa's will get this revert? because I would love my renders to use multi-cores again and I use sunab's svn ppa in Xubuntu and I use kdenlive-git from the AUR in my Arch system.


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vpinon
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Re: 4K Timelapse Questions...

Fri Nov 14, 2014 7:53 am
Revert commited yesterday, need to wait about one day to have it built?

The mutlithread option was only for MLT processing (filters & transitions calculation).

Encoding threads (what worries you most I think) actually never have been disabled; they are set in the encoding profiles; if you use the default ones for H264 for example, they load the MLT preset "x264-medium" that itselft declares "threads=0" (automatic filling of your processor power). Or do you use custom/outdated profiles?
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Ubu the Tech Guru
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Re: 4K Timelapse Questions...

Fri Nov 14, 2014 1:48 pm
this is a fresh Arch install along with kdenlvie-git from AUR, when I choose H.264/AAC High Profile and make sure Encoder Threads is set to 4, this is what I see in htop. It appears like only 1 core is being used.
Image

so I then create my own profile and within it I add threads=4 like so
Code: Select all
properties=x264-medium vb=%bitrate+'k' pass=%passes ab=%audiobitrate+'k' threads=4

it appears to still only use 1 thread. I realize that htop may not be the best monitor of cpu utilization but shouldn't it at least give a somewhat close representation of what my 4 cores are doing?


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