Goldfish: Vision-Language Understanding of Arbitrarily Long Videos

TL;DR

Goldfish introduces an efficient method for understanding arbitrarily long videos using a retrieval mechanism and a new long-video benchmark, significantly improving accuracy over previous models in both long and short video comprehension.

Contribution

The paper presents Goldfish, a novel approach with a retrieval-based mechanism for long video understanding and introduces the TVQA-long benchmark for evaluating such models.

Findings

Achieved 41.78% accuracy on TVQA-long, surpassing previous methods by 14.94%.

MiniGPT4-Video performs exceptionally on short video benchmarks, exceeding state-of-the-art results.

Demonstrated significant improvements in both long and short video understanding tasks.

Abstract

Most current LLM-based models for video understanding can process videos within minutes. However, they struggle with lengthy videos due to challenges such as "noise and redundancy", as well as "memory and computation" constraints. In this paper, we present Goldfish, a methodology tailored for comprehending videos of arbitrary lengths. We also introduce the TVQA-long benchmark, specifically designed to evaluate models' capabilities in understanding long videos with questions in both vision and text content. Goldfish approaches these challenges with an efficient retrieval mechanism that initially gathers the top-k video clips relevant to the instruction before proceeding to provide the desired response. This design of the retrieval mechanism enables the Goldfish to efficiently process arbitrarily long video sequences, facilitating its application in contexts such as movies or television series. To facilitate the retrieval process, we developed MiniGPT4-Video that generates detailed descriptions for the video clips. In addressing the scarcity of benchmarks for long video evaluation, we adapted the TVQA short video benchmark for extended content analysis by aggregating questions from entire episodes, thereby shifting the evaluation from partial to full episode comprehension. We attained a 41.78% accuracy rate on the TVQA-long benchmark, surpassing previous methods by 14.94%. Our MiniGPT4-Video also shows exceptional performance in short video comprehension, exceeding existing state-of-the-art methods by 3.23%, 2.03%, 16.5% and 23.59% on the MSVD, MSRVTT, TGIF, and TVQA short video benchmarks, respectively. These results indicate that our models have significant improvements in both long and short-video understanding. Our models and code have been made publicly available at https://vision-cair.github.io/Goldfish_website/