![]() ![]() While not perfect I've solutions using still images out of a video stream being used to assess video quality. There is not a lot that can be done, but it's always a good idea to keep that in mind while testing. performanceĪs explained above you want a lot to be done on the mobile itself (PSNR can be done offline) and this affects the performance of the software itself and the mobile's OS. If your storage is limited you can compromise on synthetic or repetitive video streams. Video consumes a lot of space, you want your original and results to reside on an SD card or internal memory during the test while still keeping high quality of the video itself. The simplest and most reliable way is probably suing MOS and especially using PSNR since it is computationally supported on many platforms and environments Challenges storage Other options could be having something identifiable in the stream like a moving element of somekind. You will first need to align your video streams in time, one way to achieve that is to insert some sycn pattern into the video stream itself for example 3D bar codes that can be analysed by software. If possible your software can output the decoded video stream to file instead of the stream, the main drawback here is that you don't test the software end to end. On some phones you can output the stream to hdmi and record it from there using traditional tools You can use adb's record tool to simply record the screen Usually the best idea would be injecting a premade video stream, performance wise you would want to store it on the device on an SD card. Simply using the camera would make comparison problematic since you don't have the reference stream, also conditions might change from test to test making the results inconsistent. You want to use some algorithm to compare a reference video stream to the received stream at the remote side. ![]() Simple comparison wouldn't work, the video is being compressed and decompressed and delay is being added in the middle so even in the best case you will need to align the streams.
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