How to choose the correct preview video properties ? 4K video to 1080P

Xtadeus wrote on 11/7/2017, 2:30 AM

Hi.

I would like to ask you something if you can help me :

I have recorded some videos with the new go pro her6 and files are in 2.7K 120 FPS.

I recorded that way to make a rendering afterwards with sony vegas in 1080P 120 fps.

I would like to know what I have to choose in video properties for the preview project ... Do I have to keep the resolution of the 2.7K video or may I already choose 1980x1020 120 FPS and then make the rendering when my editing is finished ?

I never know if I have to keep the resolution of my source video in video preview properties or change to the result I want AFTER rendering.

Thank you.

Xtadeus

Comments

Xtadeus wrote on 11/7/2017, 3:13 AM

Hello Cornico.

Yes indeed I want to render the video in 1920x1080 sorry. And my files are in 2.7K 120 FPS.

So I could choose (in preview video project ) the resolution I will use when I make the rendering right ? 1920x1080 120 fps.

I ask this because despite a good computer, a good graphic card, my preview project setting for the moment is set as the same resolution as my video files ( 2.7k 120FPS ) and I don't know if it is the reason why it is laggy when the preview is passing from one cut to another... If I can use 1920x1080 and then when I have finished my edition, make the rendering in 1920x1080 it would be ( I guess ) better to work on the edition.

ah so project settings are INDEPENDANT of rendering setting... I will try preview in 1080P and then will make the rendering in 1080P as well ( will see if it gives me less or no lag while editing )

Another small question concerning FPS : if my videos are in 120 FPS, do I have to render the final video in 120 FPS as well ? Would I get problem ( or slow downs ) if I render a 120 FPS into a 60 FPS or 30 FPS final file ?

ps : I work with 120 FPS to make smooth slow motion when editing ( putting 0.250 on some clips )... but I don t know if I have to keep the 120 FPS for the final rendering.

Thanks again if you can give me some info.

Xtadeus wrote on 11/7/2017, 3:49 AM

I think you are right.
No need to film with high FPS if I don t intend in making slow motion with it after.
Better to film everything in 60 fps.

But what could happens with video in 120 fps if I render them in 60 fps afterwards ? Nothing ? Is it better to keep the 120 fps from initial files ? When you use high framerates from the camera to make slow motions, what do you do after for rendering ? You keep the high frames or you choose 60 fps as final result ?

I am a bit confused with all of that ^^

Thank you again ( all my videos will be on youtube 1080P 60 FPS ) ( but originally filmed in 4k 60 fps or 2.7k 60fps or more ( indeed ).

Xtadeus wrote on 11/7/2017, 5:27 AM

Thx Cornico. I will try to change the preview video project to 1080P, continue to import my 2.7K 120 FPS files into sony vegas, and see if I have less lag/freeze during edition.

Then when my work is finished, I will make a rendering at 1080P 60 FPS to upload to youtube afterwards.

ps: concerning the disable resample option, that is already something I do each time.

I keep you advised ! ( hope to get less lag during edition it was really hard to edit, and I even had crash when using stabilize effects to some clips )

Thx

walter-i. wrote on 11/7/2017, 5:45 AM

For more information about smoothely preview - do you know this one?

Many greetings
Walter

Xtadeus wrote on 11/7/2017, 6:13 AM

No I did not know the link. Thanks. Will try as I said, and if necessary, will complete with that one.

Can you tell me ( if you know ) as I record my videos with the new Go Pro Hero 6 ( H.265 HEVC for encoding ) ( I use Handbrak to modify the videos into h.264 lossless in order to keep the quality the picture, and same fps as souce ) if my computer : I7 4790K with 32gb ddr3 memory under win7 64 bits and Ge force EVGA 980ti is sufficient or could be lacking power to edit such 2.7k or 4k videos ?

Thx

walter-i. wrote on 11/7/2017, 6:57 AM

Unfortunately not.
But perhaps there is an info in the "Vegas Pro FAQs", which are in the Section "important posts" (the 4th entry on Forum Vegas Pro)

Xtadeus wrote on 11/7/2017, 7:19 AM

oki and concerning software stability and performance ( for 4k or h.265 ) I am using sony vegas pro 13 and it was not able to open the file with that codec.
If I buy the sony vegas pro 15, will it be possible to open those files directly without converting them ?
Are the performances better ? ( for editing / rendering ) ... ?

thx.

NickHope wrote on 11/8/2017, 2:36 AM

oki and concerning software stability and performance ( for 4k or h.265 ) I am using sony vegas pro 13 and it was not able to open the file with that codec.
If I buy the sony vegas pro 15, will it be possible to open those files directly without converting them ?
Are the performances better ? ( for editing / rendering ) ... ?

thx.

Vegas Pro 14/15 can open HEVC but there are problems. Here is one example thread: https://www.vegascreativesoftware.info/us/forum/loading-hevc-projects-uses-100-ram-then-crashes-pc--105392/

GoPro Hero6 footage in particular has a problem with audio: https://www.vegascreativesoftware.info/us/forum/hevc-gopro-hero-6-audio-issues--109243/

If you transcode to H.264 then read this: https://www.vegascreativesoftware.info/us/forum/new-avc-issues-in-vp15-try-disabling-so4compoundplug-dll--108345/

Editing performance is generally no better in VP15 than VP13. There are faster AVC rendering options if you have an NVIDIA card that supports NVENC or an Intel CPU that supports QSV.