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1

Convertir vidéo 25 fps en 50 fps

Community Beginner ,
Jan 27, 2025 Jan 27, 2025

Bonjour à tous,

 

Je travaille actuellement (pour un projet perso) sur une vidéo au format 25 fps et j'aimerais savoir quel est le meilleur moyen via Premier Pro de la transformer en une vidéo de 50 fps.

 

Le fichier d'origine est un 1080i 25 im/s avec trames entrelacées. (ligne du haut d'abord, balayage MBAFF)

 

Dois-je effectuer la transformation via Media Encoder ou est-ce plus simple sur Premier Pro directement ?

 

Dans l'idéal j'aimerais un fichier final de 1080p50 et désentrelacé car il s'agit d'une vidéo avec des images rapides et beaucoup de mouvement, donc j'ai besoin d'un rendu le plus fluide possible tout en conservant bien sûr le maximum de la qualité d'origine du fichier.

 

Existe-t-il différentes façon de procéder ?

 

Merci d'avance de vos précieux conseils.

 

Bonne journée à tous.

 

Andy

 

 

 

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Editing , Formats
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correct answers 1 Correct answer

Community Expert , Jan 27, 2025 Jan 27, 2025

Place the 1080i footage on a 1080p50 timeline and export it as 1080p50. That´s all you have to do.

 

You can also edit the 1080i footage in a 1080p50 timeline without exporting the footage to a new file and then use that file in the project. That can be good to know.

 

If you do that you will retain the fluid motion from the 1080i file. If you deinterlace it you will get bad quality with choppy motion. Deinterlacing is and has never been a way to make footage motion fluid and smooth.

 

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Community Expert ,
Jan 27, 2025 Jan 27, 2025

Place the 1080i footage on a 1080p50 timeline and export it as 1080p50. That´s all you have to do.

 

You can also edit the 1080i footage in a 1080p50 timeline without exporting the footage to a new file and then use that file in the project. That can be good to know.

 

If you do that you will retain the fluid motion from the 1080i file. If you deinterlace it you will get bad quality with choppy motion. Deinterlacing is and has never been a way to make footage motion fluid and smooth.

 

quote

I'm currently working (for a personal project) on a video in 25 fps format and I'd like to know what is the best way via Premier Pro to transform it into a 50 fps video.


By @Andrea24953621fdip

 

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Community Beginner ,
Jan 27, 2025 Jan 27, 2025

Bonjour Averdahl,

 

Merci pour le conseil. Je vais essayer ça. 

Ok, bon à savoir (pour le désentrelacement).

 

Pour le projet, comment dois-je procéder pour le paramétrer en 1080p50 dès le départ ?

 

Puis-je le faire au moment de lancer un nouveau projet ?

 

Merci encore.

 

Andy

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Community Expert ,
Jan 27, 2025 Jan 27, 2025

When you create a new Sequence via File > New > Sequence you can go to the Settings tab and change the Timebase from xx to 50,00 frames/second. Click OK when done.

 

If you want to change an existing Sequence, select the sequence and go to Sequence > Sequence Settings and change the Timebase from xx to 50,00 frames/second.

 

You cannot set the project itself to a specific framrate, it´s always the Sequences that you set to a specific framerate.

 

Averdahl_0-1737995849606.png

quote

For the project, how do I set it to 1080p50 from the start?

 

Can I do this when starting a new project?


By @Andrea24953621fdip

 

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Community Beginner ,
Jan 27, 2025 Jan 27, 2025

Ok, merci bien.

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Community Beginner ,
Jan 28, 2025 Jan 28, 2025

Une dernière petite question pratique.

 

Quand j'ai transformé la séquence en 50 fps et que j'utilise mon fichier de base en 1080i (25fps), puis-je faire mon montage, mes différents cuts et inserts vidéos dans cette séquence là (à partir donc du fichier de base en 25fps) ? Pour ensuite exporter le tout fini en 50 fps ?

 

Ou dois-je d'abord l'exporter en 50 fps puis ensuite "retravailler" la vidéo et faire mon montage ?

 

Merci d'avance.

 

Andy

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Community Expert ,
Jan 28, 2025 Jan 28, 2025

Yes, you can edit your 1080i25 file in your 1080p50 sequence and then export it to 1080p50 without problems. 🙂

 

quote

When I transformed the sequence into 50 fps and I use my base file in 1080i (25fps), can I do my editing, my different cuts and video inserts in this sequence (from the base file in 25fps)? To then export the whole finished thing in 50 fps?


By @Andrea24953621fdip

 

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Community Beginner ,
Jan 28, 2025 Jan 28, 2025

Ok, merci beaucoup pour ces précieux conseils. 

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Community Beginner ,
Feb 02, 2025 Feb 02, 2025

Bonjour, j'aurais encore une petite question si vous le permettez.

Sur ma séquence en 50fps, j'ai travaillé sur plusieurs pistes audios (à partir de fichiers vidéos en 25fps) que je souhaite exporter en format mp3 avant de les remettre sur le fichier video final en 50fps. Puis-je les exporter via l'export classique ou dois-je suivre une quelconque procédure sachant que ces pistes audios devront correspondre à la vidéo finale en 50 fps ? J'aimerais être sûr de ne pas commettre d'impair, car je ne voudrais pas que ces pistes audios soient désynchronisées avec la vidéo en 50 fps une fois remises dessus.

Un grand merci d'avance. 

Andy

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Community Expert ,
Feb 02, 2025 Feb 02, 2025

You don´t have to do anything. 

 

One (1) second of audio in 25 fps video is one (1) second in 50 fps video as well. Video has frame rate, audio has not so exporting/importing is not needed. If in doubt, try to export your video and look/hear if the audio is out of sync.

 

If you still want to do it, avoid mp3 and use wav instead.

 

quote

...because I don't want these audio tracks to be out of sync with the 50 fps video once put back on it.


By @Andrea24953621fdip

 

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Community Beginner ,
Feb 02, 2025 Feb 02, 2025

Ok merci bien. Jusque-là, j'avais tendance à exporter les audios un à un, car j'ai besoin de les transformer en format AC3 pour les joindre à la vidéo finale. Et cela me permet aussi, via un autre logiciel, de nommer les différentes pistes audios pour facilement me retrouver. Via Premier Pro, peut-on tout exporter d'un coup ? Vidéo et les différentes pistes audios associées ? Peut-on aussi renommer les pistes audios pour que le nom de chacune d'entre elles apparaissent (au moins au début) au moment de la lecture ? Merci encore pour précieux temps et vos conseils avisés Averdahl.

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Community Expert ,
Feb 02, 2025 Feb 02, 2025

Yes, try to put let´s say 10 minutes of 25 fps footage on a 50 fps timeline and export it and then playback the exported footage. The output will be in sync without having to do anything special about the audio prior to export.

quote

Via Premier Pro, can you export everything at once?


By @Andrea24953621fdip

 

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Community Beginner ,
Feb 02, 2025 Feb 02, 2025

Ca marche. Merci beaucoup. Encore une fois. 

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Community Expert ,
Feb 02, 2025 Feb 02, 2025
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You´re welcome! 🙂

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It works. Thank you very much. Once again. 


By @Andrea24953621fdip

 

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