![]() Now imagine a car doing 100km/h (62mph), perpendicularly to the axis of your camera. And so, at night NTSC cam will use 1/30s exp., PAL will use 1/25s exp. If there is no such frame rate available, it will use its highest frame rate, like 15fps or 20fps. By default all NTSC cameras are set to 30fps, while PAL ones to 25fps. This sentence is true only when considering longest available exposure for a given framerate.Īt factory settings your camera will use shutter speed as slow as possible dictated by framerate. I'm mentioning this, because once I've seen a thread, where a person claimed that the more fps you have in your camera the sharper the image will be. ![]() This is by the way one and only relation between framerate and shutter speed. If you use slower shutter, you will lose framerate. So there is no way to use longer exposure than 1/30s at 30fps. If you multiply 1/30s by 30fps you get exactly 1s. In this example 1/30s is the longest exposure available, because we've set a frame rate to 30. ![]() This is what is called the exposure time (in camera settings it is called SHUTTER). It can "look" at the scene for as long as 1/30 second or as short as 1/100000s. For simplicity it can be described like this: for every frame the camera "looks" at the scene through the lens and saves the image. If you set its frame rate to 30 frames per second (fps), it captures 30 images per second which are then combined into a video file. Your camera captures a given amount of frames (images) every second. Motion blur is a result of exposure time (shutter speed) being too long in respect to motion of an object. The image looks great on factory settings, but all moving objects at night are blurry and I can't identify anything." Leaving factory settings is not a good idea. Many times on this forum I've seen posts like: "I bought a set of cameras recently. This is probably the most common issue, new camera owners run into. Bref, c'est un des logiciels les plus complets du genre, bourré de fonctions étonnantes.Here is a quick guide to what might go wrong with the image of your cctv camera, and how to fix this. Il permet aussi de remplacer la piste audio d'une vidéo, de faire des coupes sans recompression, d'incruster un time code, de créer des sous-titres, d'ajouter un logo en filigrane sur des images, de renommer en lot des fichiers, de télécharger des vidéos depuis Internet, etc. Outre ses fonctions de conversion et d'encodage, il propose des outils de rognage d'image très efficaces. Comme il est basé sur FFmpeg, il dispose d'une immense bibliothèque de codecs et gère ainsi des fichiers dans de très nombreux formats compressés ou non compressés, y compris ceux utilisés chez les professionnels de l'audiovisuel et du broadcast. Très puissant, tout en restant assez simple d'emploi, il offre une foule de fonctions pour encoder, convertir, retoucher et optimiser des images, des vidéos et des fichiers audio. ![]() Une référence !Ĭonçu à l'origine par et pour des monteurs vidéo par un développeur français, Shutter Encoder est l'un des rares outils de traitement audio et vidéo de qualité réellement professionnelle qui soit totalement gratuit. De qualité professionnelle, mais totalement gratuit, Shutter Encoder est un outil particulièrement puissant et complet pour encoder, convertir et traiter des fichiers audio et vidéo dans de nombreux formats.
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