By Nick Wilson 
For companies that offer video on demand and over-the-top services, often known as VOD and OTT, protecting their content from unauthorised use and disclosure has never been more vital than it is right now. In fact, it is more important than it has ever been. In point of fact, the significance of doing so is higher than it has ever been before. The utilisation of digital rights management (DRM) protected content has achieved widespread popularity among content creators and distributors as an additional technique of inhibiting unlawful streaming. DRM stands for digital rights management and is an acronym for digital rights management system. The abbreviation for “digital rights management” is “DRM.” The phrase “digital rights management system” is shortened to “DRM,” which is an abbreviation for the term. The administration of digital rights is what is meant by the abbreviation “DRM.” This is done with the intention of preventing unlawful streaming and limiting the amount of damage that could be caused as a consequence of it. You will be able to differentiate between the video streams that are associated with each particular watching session and the video streams that are associated with other sessions with the assistance of watermarking. The most common methods for adding a watermark to an image include bitstream modification, A/B watermarking, and watermarking that is done on the client’s side. However, there are many other methods for adding a watermark to an image. The technique of watermarking can also be accomplished through a wide number of other available methods.
Session-based watermarking is something that can be implemented on any streaming player or device, and it ensures that each individual user gets a copy of the video that is completely unique to them. Because it can be added to any streaming player or device, this form of digital watermarking has the potential to be of great benefit. Any media player or device that can play streaming video or audio can have session-based watermarking applied to the content it plays. It is possible for the edge server to carry out the necessary duties for video watermarking since all streaming sessions are sent from the edge of the content delivery network (CDN). Because every streaming session is sent from the edge, this is now within our grasp of possibility. Because of the most current advancement in watermarking technology, service providers are now able to directly inject a watermark into an encoded bitstream. This allows for greater flexibility and efficiency. The progress that has been made in technological capabilities has made it possible for this to occur. During this stage of the process, the edge server will first generate a one-of-a-kind identifier for each individual piece of content. This step comes just before the content is distributed to end users.
The following is a list of anti-piracy procedures that, with the assistance of an edge server, can be put into action:
The video asset that will be transferred is first subjected to the ABR transcoding procedure. Only after this step can the pre-processing for the watermark commence. This happens before the beginning of the process of submitting the application. This method of video analysis is beneficial in easing the process of encoding a WMID since it locates probable transition spots in the video stream. It accomplishes this by locating points in the video stream that are prone to undergo changes (Watermark Identifier). During the process of packaging the bitstream, the information that was obtained from this analysis is added to the metadata and encoded. During the entirety of the packing procedure, this step is carried out.
After some investigation, it was discovered that the token for the watermark had been delivered: Before beginning each individual watching session, the video player will first check to see if a WMID has been supplied in any manner. If it has, then the session will proceed to the next step. The platform management subsystem of the content provider will generate a JSON web token. This token will be similar to a WMID in that it will be able to perform the functions that are associated with it.
Before responding to a request for a video, the edge server does a validity check on the WMID token to determine that it is an authentic token and then processes the request. If the compliance checks are passed, then the WMID that was supplied in the token will be used to add a watermark to the ABR video that was requested; however, this will only take place if the tests are passed successfully. This occurs if and only if all of the tests are completed successfully and with flying colours. After that, the content delivery network (CDN) will start distributing videos that have already been watermarked. This will ensure that each individual consumer will get their very own, individualised video stream. The videos that have already been watermarked will be disseminated so that this goal can be accomplished.
The use of edge computing for bitstream watermarking can lower the requirements for storage and bandwidth, but it will also increase the latency of the video. This is made possible by the fact that in order to watermark an object, it is only necessary to do so on a single version of the item. This is because there is only one version of an asset that has to have a watermark put to it. This is the reason behind this. This is because it is not necessary for there to be more than one version of an asset that contains a watermark in order for it to be effective. Instead, all that is required is for there to be at least one version. If the watermark can be identified and obtained in advance, it will be considerably simpler to identify leaks and fix any damage that may have been caused as a result of those leaks. If the watermark cannot be located and obtained in advance, it will be significantly more difficult to identify leaks. In the event that the watermark cannot be located and retrieved in advance, it will not be feasible to locate leaks in the system.