Artefakte / Unschärfen beim Rendern eines langen Film, nicht bei kurzem

New Here ,
Jan 20, 2021

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Hallo,

folgendes Problem: Beim Rendern eines 1h-Flims  ergeben sich Unschärfen, Artefakte, Rauschen und Stufen bei vielen 25 fps-Clips. Die erzeugten Unschärfen sind auch innerhalb einer Szene nicht immer durchgängig. Die 50 fps-Clips sind OK. Rendere ich die gleichen 25-fps-Clips einzeln oder als Minifilm von 3 Clips, so ist das Ergebnis OK. In allen Fällen habe ich mit den komplett gleichen Exporteinstellungen gearbeitet. Die Bitrate sollte mit  50 MBit/s für 1920*1080 ausreichen, Maximale Tiefe war auch vorgegeben.

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Adobe Employee ,
Jan 20, 2021

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Hi Carsten,

Sorry. Can you embed some screenshots so we can visualize what you are also seeing? Please use the photo icon to embed actual photos, do not simply attach the files.

 

Thanks,
Kevin

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New Here ,
Jan 22, 2021

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Hi Kevin,

Find enclosed two examples. Another problem: Rendering the film sometimes does not finish (keeping Renering with 100% for an hour) or finishing the film before expected time with only (for exemple) the first third of total clips, afterwards jumping to the end. Tried this on two different computers, similar results.Premiere-Render-01a.jpgPremiere-Render-01b.jpgPremiere-Render-02a.jpgPremiere-Render-02b.jpg

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Adobe Community Professional ,
Jan 22, 2021

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are any of your sources from a screen capture or shot on a smartphone?  If so, your problem is probably be caused by variable frame rates


use mediainfo to determine whether your source is variable or constant frame rate

https://mediaarea.net/en/MediaInfo/Download

if it's variable use handbrake to convert to constant frame rate

https://handbrake.fr
and here's a tutorial on how to use handbrake

https://www.youtube.com/watch?time_continue=34&v=xlvxgVREX-Y

 

If that's not the case, you might try smart rendering

https://community.adobe.com/t5/premiere-pro/faq-what-is-smart-rendering/td-p/10648488?page=1

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New Here ,
Jan 22, 2021

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Some of the clips have (constant) 50 fps, some have (constant) 25 fps. Is this a problem for premiere pro? Also: I already mixed 50 fps and 25 fps clips in my 1-min-test; export there without problems, problems"only" in the 1-hour-film.

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Adobe Community Professional ,
Jan 22, 2021

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did any of our sources come from screen recordings or smarphone videos?  and did you check the frame rate with media info?  What your describing is NOT normal behavior for Premiere Pro but could be caused by variable frame rate sources.  Unfortunately, the problems caused by vfr are inconsistent and cannot be predicted.  

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New Here ,
Jan 22, 2021

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No screen recordings and no smartphone videos. Most of DJI (mp4), some of Canon Handycam (mpeg)

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Adobe Community Professional ,
Jan 22, 2021

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both of these formats are processor intensive and you would get much better performance transcoding to an all i-frame format like prores (happy to explain what this means if you don't know).  and we do see many posts here about problems with dji footage.   It would help us figure out what's going on if you would Please tell us your system specs: OS version, Premiere version, amount of RAM, Hardware specs including graphics card.

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