NDLI: An experimental study of video uploading from mobile devices with HTTP streaming

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An experimental study of video uploading from mobile devices with HTTP streaming

Content Provider	ACM Digital Library
Author	Zimmermann, Roger Seo, Beomjoo Cui, Weiwei
Abstract	Mobile video traffic is growing rapidly in networks due to the continuing user adoption of smartphones and tablet computers. While video viewing is now prevalent on such devices, they also easily enable the recording and uploading of videos for quick publishing on popular video sharing websites. Dynamic Adaptive Streaming over HTTP, or DASH, is a media streaming standard that has recently been developed by the Motion Pictures Experts Group (MPEG) and which has gained attention for its ability to enable media players to render videos with high quality under various network conditions. MPEG-DASH has been ratified at the end of 2011 and is now also known as ISO/IEC 23009--1. It is noteworthy that the focus of the initial standard is limited to the efficient server-to-client distribution of videos. In our study we examine the common challenges that manifest themselves during the client-to-server uploading of mobile videos, for example such issues as unstable wireless connections and delayed video availability. We propose a new approach that provides compatibility with DASH and at the same time improves content availability by reducing the end-to-end delay from the recording time of mobile videos to the publishing of the first segment of the multi-bitrate encoded versions through a careful pipelining of the overall process. Our approach features (1) the use of segmentation of videos on the mobile device before uploading and (2) segment-wise transcoding and transformatting on the server side. Therefore, our solution does not require any dedicated encoder for live events while achieving semi-realtime live streaming and providing multi-bitrate content for user-generated videos from smartphones. We report on the performance of our prototype system which uses Android and iOS client devices.
Starting Page	215
Ending Page	225
Page Count	11
File Format	PDF
ISBN	9781450311311
DOI	10.1145/2155555.2155589
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2012-02-22
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Http streaming Dash Segmenting Transcoding Upload Mobile video
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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