This is an important prerequisite for the following reasons.Ī. Video players and users cannot choose/switch between resolutions. Progressive Download files can only be encoded in a single resolution - a major drawback. Progressive Download is not suited for ‘live’ streaming - even though this blog primarily deals with VOD it is the lack of ‘live’ streaming capability that led to alternative technologies to crop up. ![]() ‘Progressive Download’ has its drawbacks. With the proliferation of high speed internet, better video encoding (I’m talking about H.264 here) and powerful CDNs, ‘Progressive Download’ gives the viewer a virtual buffer-less and seamless viewing experience. ‘Progressive Download’ had become the mainstay of online video for the last 15 years or so. It downloads the video file in parts (it relies on the meta-data present in the file header to do this in the right sequence), buffers the downloaded data and plays the buffered data as and when it has enough data. The video player does not download the entire video file before playback. Only, the video file is not accessed from the local hard-drive but served from a remote server or (most probably) from a Content Distribution Network (CDN). ‘Progressive Download’ playback is similar to how you would play a video in your PC or laptop. Choosing either or both could have a significant impact on the performance and usability of your OTT application. While building an OTT application, it is useful to understand the technology behind both these streaming methodologies and their respective advantages and disadvantages. ![]() Video delivery via Progressive Download vs. Because, what I just described above are the two common techniques used in video delivery - namely ‘Progressive Download’ and ‘Adaptive Bitrate Streaming’. The answer to both those questions is ‘yes’. Is the video sent as a single monolith file by the server that is progressively downloaded and played back by the player? Or is the video sent as small chunks of ‘mini video files’ that are played sequentially to make it look like one seamless playback? While we all enjoy watching videos online, rarely do we think how the video gets streamed to the video player.
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