CVT: A crowdsourcing video transcoding scheme based on blockchain smart contracts

Yuling Chen, Hongyan Yin, Yuexin Xiang, Wei Ren, Yi Ren, Neal Naixue Xiong

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)
10 Downloads (Pure)


Streaming media has been largely used by millions of users every day. The number of customers and programs, e.g., TV series, movies, and various shows, are still growing fast. However, the demand for video transcoding for various personal terminal devices results in the shortage of computing resources and the prolongation of processing delay in centralized video transcoding systems. To solve this issue, we propose a blockchain, especially, smart contract based scheme that can achieve decentralized and on-demand crowdsourcing for video transcoding, which remarkably mitigates the transcoding overhead. Specifically, our scheme consists of four key components such as employers, workers, task allocation, and payment. An employer initializes the smart contract, releases the task, and initiates the smart contract. Workers bid for the task, and the successful bidder will obtain the task and execute the task. The task allocation mechanism and the payment mechanism can guarantee the profits of both and encourage both as well. Moreover, the smart contract consists of the bidding contract and the task execution contract. The extensive analysis of our proposed scheme justified the feasibility, security for defending against typical threats, applicability in realistic situations, and portability for most multimedia such as videos and audios.

Original languageEnglish
Pages (from-to)220672-220681
Number of pages10
JournalIEEE Access
Early online date7 Dec 2020
Publication statusPublished - Dec 2020


  • Blockchain
  • Crowdsourcing
  • Smart Contracts
  • Video Transcoding

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