Screencast Dissected: Performance Measurements and Design Considerations


Dynamic and adaptive binding between computing devices and displays is increasingly more popular, and screencast technologies enable such binding over wireless networks. In this paper, we design and conduct the first detailed measurement study on the performance of the state-of-the-art screencast technologies. Several commercial and one open-source screencast technologies are considered in our detailed analysis, which leads to several insights: (i) there is no single winning screencast technology, indicating rooms to further enhance the screencast technologies, (ii) hardware video encoders significantly reduce the CPU usage at the expense of slightly higher GPU usage and end-to-end delay, and should be adopted in future screencast technologies, (iii) comprehensive error resilience tools are needed as wireless networks are vulnerable to packet loss, (iv) emerging video codecs designed for screen contents lead to better Quality-of-Experience (QoE) of screencast, and (v) rate adaptation mechanisms are critical to avoid degraded QoE due to network dynamics. Furthermore, our measurement methodology and open-source screencast platform allow researchers and developers to quantitatively evaluate other design considerations, which will lead to optimized screencast technologies.


Chih-Fan Hsu, Tsung-Han Tsai, Chun-Ying Huang, Cheng-Hsin Hsu and Kuan-Ta Chen, "Screencast Dissected: Performance Measurements and Design Considerations," In Proceedings of ACM Multimedia Systems 2015, Mar 2015.


@inproceedings{hsu15:screencast, author = {Chih-Fan Hsu and Tsung-Han Tsai and Chun-Ying Huang and Cheng-Hsin Hsu and Kuan-Ta Chen}, title = {Screencast Dissected: Performance Measurements and Design Considerations}, booktitle = {Proceedings of ACM SIGMM Conference on Multimedia Systems (MMSys'15)}, pages = {--}, month = {March}, year = {2015} }