What is Video Encoding? Codecs and Compression Techniques
Mar 18, · Also called video conversion, video encoding converts a given video input into a digital format that is compatible with most types of Web players and mobile devices. In the most basic sense of the term, video encoding is compressing video files so that they are not saved as individual images but as fluid video. Aug 12, · Video encoding is the process of converting digital video files from one format to another. Encoding is also known as “transcoding” or “video conversion.” At the time of recording, the device gives the video file a particular format and other specifications/5(5).
Was this reply helpful? Yes No. Sorry this didn't help. Thanks for your feedback. I would request you kindly check now that video uploading and after uploading its playing is now happening correctly or not. This video could not be loaded, either because the server or network failed or because the format is not supported. The message has changed from "we're encoding it" to "this video can't be played here.
Please download the file", which is not exactly a fix in my book. From the three snippets I tried uploading from my enccoding, one is showing properly, the other two are supposedly still "Encoding" - since Wednesday! We are talking about videos shorter than 30 seconds here!
I'd understand it if I uploaded a three hour epos or footage from, say, a 24 hour livestream as in, all of itbut this is just disappointing. Choose where you want to search below Search Endoding the Community. Tobias Unruh. I've uploaded a short mp4 video 51 seconds in total on yammer about YouTube was done with that video within a few seconds, so it's unlikely that the original file is somehow corrupted.
The video was, however, rendered with the H codec. Is yammer somehow incapable of dealing with that? Should I upload the bigger, unrendered version of the video or should I just wait a few more hours? I would prefer not to post the YouTube link to my video. This thread is locked. You can follow the question or vote as helpful, but you cannot reply to this thread. I have vidfo same question I'm having the same problem with mp4 files. I tried creating several versions with smaller and smaller file sizes but what can you do with a luck.
Yammer is so glitchy I can't stand to use it, but I must as my encodding uses it. Very annoyed. How satisfied are you with this reply? Thanks for your feedback, it helps us improve the site. In reply to A. User's post on May 23, As far as I know, it doesn't get much smaller than H at the moment, and it used to work with mp4 files taken straight from my phone just fine.
Ahat well, guess I'll have to reupload. In reply to Tobias Unruh's post on May 23, Hello What is the berlin crisis, We have messaged you in private chat regarding some confidential information of your network.
Kindly go through that and reply on the same. Regards, Sreejith. Bas Otte. Same issue here User Moderator. In reply to Bas Otte's post on May 24, Hello Bas, The issue with video uploading and playing in yammer might be fixed now.
Regards, Sushil Dhiwa. Microsoft Yammer support team. User's post on May 24, Hi, The problem seems to be resolved for me now, thanks. Shi Ping Sia. Hi Sushil, I have the same problem with a 4s mp4 video. Error message: This video could not be loaded, either because the server or network failed or because the format is not supported.
Please advise. Thanks, Shi Ping. This site in other languages x.
Why is encoding important?
Mar 16, · Video encoding is the process of converting digital video files from one standard digital video format into another. The purpose of this is for compatibility and efficiency with a desired set of applications and hardware such as for DVD/Blu-ray, mobile, video streaming or . Feb 20, · What is video encoding? In simple terms, encoding is the process of compressing and changing the format of raw video content to a digital file or format, which will in turn make the video content compatible for different devices and platforms. Video encoding is the process of turning uncompressed video input into a form that can be stored and played by a variety of devices. Video encoding involves two main processes: compression and transcoding. Compression, or the discarding of superfluous data, significantly decreases the size of a video file so that it is more manageable.
What is video encoding? In simple terms, encoding is the process of compressing and changing the format of raw video content to a digital file or format, which will in turn make the video content compatible for different devices and platforms.
The main goal of encoding is to compress the content to take up less space. When the content is played back, it is played as an approximation of the original content. Of course, the more content information you get rid of, the worse the video that is played back will be, compared to the original. The process of video encoding is imposed by codecs, which we will discuss in this post.
Video encoding is important because it allows us to more easily transmit video content over the internet. In video streaming, encoding is crucial because the compressing of the raw video reduces the bandwidth making it easier to transmit, while still maintaining a good quality of experience for end viewers.
If all the video content was not compressed, available bandwidth on the Internet would be inadequate to transmit all of it and prevent us from deploying widespread, distributed video playback services. The fact that we can stream video on multiple devices in our homes, on-the-go using mobile, or even while video chatting with loved ones across the globe, even with low bandwidth, is owed to video encoding. In video encoding, motion is very important.
We most often express this in I frame or keyframe , P frame and B frame. The keyframe stores the entire image. In the next frame or the P frame, when noticing not much has moved or changed, the P frame can refer to the previous keyframe, as only some pixels have moved.
I, P and B frames form groups of pictures GOPs together, and frames in such a group can only refer to each other, not frames outside of it. Within each frame, there are macroblocks. Each block has a specific size, colour and movement information. These blocks are encoded somewhat separately, which leads to proper parallelization. Previously, codecs such as H.
Large blocks are used when there isn't a lot of detail needed in the block, and only using a large block saves a lot of space, rather than just having many small blocks. Macroblocks consist of multiple components. There are sub-blocks whose purpose is to give pixels colour information. There are also sub-blocks that give the vector for motion compensation compared to the previous frame.
Due to this macroblock structure, in low bandwidth situations there can be sharp edges or "blockiness" visible within the video content. There are ways around this by adding a filter that smooths out these edges. The filter is called an "in-loop" filter, and is used in the encoding and decoding processes to ensure the video content stays close to the source material.
In most cases, we divide a color in RGB channels, however, the human eye detects changes in brightness much more quickly than changes in color, especially in moving images. Therefore, in video, we use a different color space called YCbCr. This colour space divides into:. In chroma subsampling, we split images in their Y channel and their CbCr channel.
For example, from an image we take a grid of two rows with four pixels each 4x2. In the subsampling we define a ratio as j:a:b. In streaming video, is the full colour space. In video streaming think your Netflix and Hulu TV shows , the most commonly and widely used is In the video editing space however, is the most common.
When discussing the encoding of video, we refer to more than just saving space with the image components, but also with the audio components. Audio is a continuous analog signal, but for encoding, we need to digitise this. Once the audio is digitised, we split it up into multiple sinusoids, or sinus waves, each of which represents an audio frequency.
To save space, we can discard frequencies that we do not need. If we take an image, we can also see rows of pixels behind one another as one large signal. Just like audio we remove frequencies in the image, known as frequency domain masking. Removing frequencies does lead to a loss of detail, but you can remove a fair amount of frequencies without it being noticeable to the end viewer. This process is known as quantization.
Codecs are essentially standards of video content compression. Codecs are made up of two components, an encoder to compress the content, and a decoder to decompress the video content and play an approximation of the original content. For audio, AAC is seen as the de-facto standard in the industry. AAC is essentially supported everywhere, and has the largest market share. Other audio codecs include: Opus, Flac and Dolby Audio. Opus excels in voice and is also used by YouTube, seemingly the only large service using it, but still it falls back to AAC.
It is supported virtually everywhere, on any device, while still providing a quality video stream, and is seen as a baseline for newer codecs. It also is relatively easy concerning royalty fees.
This codec was first standardized in , and was eventually expanded on from through The goal with H. These improvements were achieved by optimising the techniques that already existed in H. Essentially, H. Although this is all great news, H. The main issue is the uncertainty around licensing and royalties. VP9 was standardised in This codec is similar to HEVC, however no royalties are required. They instead support H. Instead of creating three separate codecs and frustrated by the limitations of royalties, they decided to join, therefore AV1 was created.
All AOMedia members offered up their related patents to contribute to a patent defense programme. While the AV1 codec is finalised, there is still work being done, but it seems the codec is starting to be adopted by big industry players and will continue to be in the future.
The current state of codecs seems relatively simple: AAC for audio, and H. The multi-codec approach is a must in these situations. However, it's only enabled in places where CPU power is way cheaper than bandwidth, for example when a viewer is streaming over 4G. Netflix is aiming to use AV1 for all platforms in the future. EVC will be suitable for realtime encoding and decoding. A hybrid codec is essentially a codec which works on top of another codec. The process usually follows these steps:.
Perseus has the advantage of saving in the scale of HEVC without having to redo the whole encoding pipeline, and it also has hardware decoding on iOS and Android. This essentially means "superresolution" generation with a neural network NN or an AI. The NN is trained to enhance the image and add details which were lost during compression.
The goal is to reach 40ms to get a framerate of 25fps. The biggest challenges are with fidelity, meaning the image before compression is the same after enhancement, and it is still difficult to do while DRM is in play.
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Quick start. API Reference. Code Samples. All How To Guides. Configure your DRM. AV1 H. Why is Encoding Important? Motion Compensation In video encoding, motion is very important. Macro Blocks Within each frame, there are macroblocks. Chroma Subsampling In most cases, we divide a color in RGB channels, however, the human eye detects changes in brightness much more quickly than changes in color, especially in moving images. Quantization When discussing the encoding of video, we refer to more than just saving space with the image components, but also with the audio components.
What are Codecs? Video Codecs H. Hybrid Codecs A hybrid codec is essentially a codec which works on top of another codec. The process usually follows these steps: usual steps: take an input video use proprietary downscaler on the video e.
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