There are many techniques for compress a video and image, but they all use loss compression somehow. Loss is typically expressed in the number of original bits (64 KB, for example) per processed bit. For example, It is easy to demonstrate that for images and videos. It is usually impossible to compress them without losing data. This means that there will always be a loss of quality for any video or image compression algorithm.
How to compress a video without losing quality?
To better understand this concept, we need to know what happens:
1) The first step is to divide the whole video into small sections called frames.
2) Each frame is then compressed to a given bit depth by taking it as an image with the aid of a codec.
3) The last step is to put all these frames together in order and compress them as a video.
How is it done?
This process has been made possible thanks to video compression algorithms such as JPEG 2000, H.264, Theora, and VP8. Which companies like Google, Apple videos for their products.
The main difference between the loss compression algorithms is that they use different mathematical equations to process video or image data.
A codec can be defined as rules describing how information should be represented symbolically and encoded (e.g., an image codec such as the JPEG standard).
A codec performs compression using a compression ratio (the amount of space saved) which is often measured by comparing size before and after or bandwidth required to transmit data.
Another definition is that it can be described as an algorithm that transforms any input to the desired output.
In other words, it takes the given information and processes it so that it can be transmitted or stored as efficiently as possible.
It offers an online tool to compress videos without loss of quality. You can use this free service on their website to compress a video for your personal or professional usage. Their algorithm is based on the theory of wavelet compression, which provides high-quality video images even at low bitrates.
It works by dividing a video into bands and compressing them separately. It is similar to what moviemakers do when they shoot scenes with different light intensities.
So, for example, you can compress your lengthy wedding video containing very bright direct sunlight without losing any important details. In shadows by providing the maximum number of waves (bands) at a “low” compression level.
Another tool to perform lossless compression is Shotcut which is also free. You can download it directly from their official webpage and install it on your computer or laptop to use it for any video editing needs.
It doesn’t have the online version that VideoSmaller provides. But it is just as effective in compressing videos without losing quality. Shotcut is a cross-platform application used on Windows, Mac OS, and Linux operating systems. It supports all the main video formats such as Flv, mp4, Mkv, among others.
The compression ratio provided by Shotcut lies between lossless and lossy codecs, which provide a high quality of images at a relatively low bitrate.
In addition, compress a video, enables you to edit or add effects in the video and audio tracks. As all the processes are done in real-time, you can view a clip before even rendering it due to their powerful technology called ‘lazy lighting.’
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