HEVC or High-efficiency Video Coding (HEVC) is a new and advanced codec. In the past, it was in the test but now it is in full roll out. Latest mobiles and computer processors also support HEVC hardware decoding. Previously software like VLC used to work with software decoding. X265 library is used to encode videos into HEVC (H.265). We have tested the power of this new video coding format and is absolutely amazing. In simple words, the revolutionary power of x265 is mind-blowing.
Currently, at 2014, the x264 library dominates the world. Now its time for the new format. Our video resolution and displays are getting better. So in order to save storage and provide the best quality, we need a new format. These days even mobile phones support recording in HEVC. They give the best result in the smallest file size.
x265 is based upon older x265 and it is used to encode videos in HEVC. The development was initiated in 2013. The public stable version was made available on October 2014. So this is a hot technology that we have seen. We are always afraid of our Hard disk space. Many of us store music videos, movies, and games. Most space is taken by movies and music video. This new technology is meant to rescue us from this issue as well. Mostly the new format helps to get higher resolution like 4K and 8K in small sizes.
Power, Quality, and Benefits
One of the main advantages of this new compression is development in high-resolution video. This encoding helps us save space while using 4K and 8k formats. We are also seeing 4K HDR movie encodes in x265. The video sizes are almost half and double the quality. We can now get a high bit rate, high-quality videos at smaller sizes. Now, people can also have 4K HDR videos with 10-bit color in small sizes. 8K resolution is also coming in the near future and this new library can surely help.
We have seen some videos and the results are terrific. For example, a sample video of the same show was 130 MB for 480p but the 720p file was just 160 MB. The main thing we are getting is the best quality at the smallest size. This saves both resources and bandwidth. We can see that we get very good quality in a small size.
The first adopters are beneficiary are content creators. Movie studios and video creators can save a lot of space. They can also save bandwidth with this new technology. Old x264 can’t provide 4K and 8K videos in small sizes like new x265. The encoding efficiency is also very good. With an increase in resolution, the bit rate decreases in comparison with x264. For 480p it is 52%, for 720p it is 56%, for 1080p it is 62% and for 4k it is 64%. These data show that resulting file sizes are very small. This is a revolutionary change for video encoding, video streaming, and storage. Streaming is also faster due to smaller sizes.
Computing Power Requirement
In the current scenario of 2014, it is hard to find TV with HEVC decoding. Computers also can’t play video files easily without software help. The old decoders need very high computing resources. In 4th generation mobile Core i5 processors, we see they are taking very high resource. The playback is smooth with some jitter here and there using VLC player.
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The data compression was designed to be 1000:1 which is immense. Till now only latest updates of VLC player and some other decoders have supported H.265 playback. Processor manufacturers are also embedding the support though. Slowly mobiles and TV are picking this feature. It is a very good sign and we will see better improvement in video encoding in the future.