Dynamic Live Streaming Index Memory Management
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Solution Overview
Problem
Creating an index for live multimedia streaming with unknown file length poses challenges due to memory overhead and inefficient seek point granularity, especially when recording events of extended duration, as existing methods require storing seek points in memory until the recording finishes and use fixed intervals that become impractical over time.
Innovation Solution
Implementing a dynamic index system with a static, fixed-length index file and a dynamic seek point interval, where seek points are initially added at a set interval, and when the index memory capacity is reached, alternate points are deleted, allowing for a new interval calculation and insertion, maintaining a balance between memory usage and seek point granularity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If seek points are stored in memory until recording finishes, then seek points are available for random access, but memory overhead becomes prohibitive for extended recording sessions
Solution Approach 1:
The index file transitions from a static structure to a dynamic one that automatically adjusts its capacity based on the recording duration. The system monitors the number of seek points and expands the index file capacity when it reaches a predefined threshold, allowing the index to adapt to extended recording sessions without requiring excessive memory allocation upfront.
Solution Approach 2:
The system pre-allocates an initial capacity for the index file and establishes a threshold for expansion. This preliminary setup allows the index to operate efficiently from the start without requiring large memory allocations, while still preparing for future growth when the recording duration increases.
2Ease of manufacture
If fixed seek point interval is used initially, then index creation is simple, but granularity becomes insufficient for long recordings
Solution Approach 1:
The seek point interval dynamically adjusts based on the recording duration and the current state of the index file. The system calculates an optimal interval by dividing the total recording time by the number of seek points already in the index, ensuring that seek points remain appropriately spaced throughout the recording process.
Solution Approach 2:
The system continuously monitors the recording duration and the number of seek points added to the index. Based on this feedback, the system recalculates and adjusts the seek point interval to maintain optimal granularity, ensuring that the index remains effective as the recording progresses.
3Reliability
If index capacity is increased to accommodate more seek points, then seek point coverage improves, but memory consumption increases
Solution Approach 1:
The index file capacity dynamically expands only when necessary, based on the number of seek points added during recording. The system monitors the index fill level and expands capacity only when a predefined threshold is reached, avoiding unnecessary memory allocation while ensuring sufficient coverage for the current recording duration.
Solution Approach 2:
The system changes the index file capacity parameter dynamically during recording operations. When the number of seek points approaches the predefined threshold, the system increases the capacity parameter to accommodate additional seek points, ensuring continuous effective operation without excessive memory consumption.
Data Source
AI summary
Generation of live streaming indices is disclosed that stores a media stream recording from a live event. Seek points are added to a fixed-length index memory corresponding to each point of the media stream separated at a first interval. In response to the fixed length being reached, alternate ones of the seek points are deleted up to a predefined percentage of the fixed length. Location indicators are added where the deletions caused the previous interval to be altered and at the end of the previous seek points remaining in the index memory. A new interval is then calculated, which corresponds to the altered interval, after which new seek points are added beginning at the second location indicator to the index memory corresponding to the points in the media stream separated by the new interval.