![]() ![]() Lossy codecs discard unnecessary data and reduce quality where possible. Lossy compression, on the other hand, gets rid of data. zip file without compromising the data integrity, for instance, you’re employing lossless compression. Lossless compression involves compacting data without discarding any information. For that reason, these video compression standards are two-trick ponies: They facilitate both the encoding/compression and the decoding/decompressing aspect of video streaming. ![]() ![]() Literally ‘coder-decoder’ or ‘compressor-decompressor,’ codecs apply algorithms to the video and create a miniature version of it. Versatile Video Coding, or VVC, is also H.266 for the same reason.”įor the sake of clarity, I’ll be including both names at first mention of each codec within the subsections of this article. “H.264/AVC and H.265/HEVC have two names because each codec was standardized by both MPEG and the International Telecommunication Union (ITU). H.264, also known as AVC (Advanced Video Coding), is the most common video codec AAC (Advanced Audio Coding) is the most common audio codec.īut wait - why does H.264 also go by AVC? And how are we to sort through so many confusing acronyms? Streaming codec expert Jan Ozer explains it: Streaming requires the use of both audio and video codecs. Codecs allow us to tightly compress bulky streams down for delivery and storage. What Is a Codec?Ĭontent distributors use a video compression technology called a codec to shrink videos into a streamable size. ![]() To put it more simply: encoding describes the process of compression, whereas codecs describe the means for doing so. In order to compress the raw video into a more manageable size, encoders use video and audio codecs, which apply algorithms to shrink the bulky video for delivery. Popular software options include Vmix, Wirecast, and the free-to-use OBS Studio. Video encoding is essential to live streaming, helping to ensure quick delivery and playback.Įncoding can occur within a browser or mobile app, on an IP camera, using software, or via a stand-alone appliance. When it comes to streaming, videos are often compressed from gigabytes of data down to megabytes of data. Video encoding refers to the process of converting raw video into a digital format that’s compatible with many devices. Upload the converted mp4 file to OpenLearning. Press the “Start” button to begin the conversion. (Select the “Browse” button to choose a different location to save the converted video file.) In the “Save As” field, the type file name for the converted video file. Open Handbrake, and immediately you would be prompted to choose the video to convert (otherwise select the “Open Source” button on the toolbar).Ĭhoose the “General > Fast 720p30” as the preset. Using a desktop application (such as the free tool “Handbrake”) to convert the video. This can be done by:Įxporting the video from your video editing software in the appropriate format, or To avoid slow uploads and transcoding delays, video files can be prepared in the recommended format prior to upload. However, this may involve a slow upload of an unnecessarily large file (if your video is unoptimised) and the video will not be made available immediately, as further processing (transcoding) is required after the file upload has been completed. In some parts of the platform where learners are prompted to share video files, the learner can still choose to continue the upload by selecting "Convert my video". The video has a maximum resolution of 1280 pixels in width and 720 pixels in heightĪ video file meeting these criteria will be uploaded to OpenLearning as quickly as possible without incurring any further processing delay. The AAC/mp4a codec is used for audio compression The H.264/AVC codec is used for video compression It is recommended that video files fit the following criteria prior to upload: Video files uploaded to OpenLearning are checked to ensure that the video and audio are encoded in a way that is suitable to be delivered over the internet. More information OpenLearning video criteria Handbrake is a tool you can use to convert your videos:ĭownload and install the converter from the Handbrake website Technical details on the supported video upload codecsīefore uploading videos to the platform, convert large video files to mp4 format with the following settings:. ![]()
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