Amazon CTO Werner Vogels recently open-sourced a command-line tool called Distill CLI, which leverages Amazon Transcribe and Amazon Bedrock to generate summaries from audio files. It simplifies the meeting recording and information extraction process and improves work efficiency. Distill CLI is written in Rust and cleverly utilizes AWS services such as Amazon S3 and AWS Lambda to achieve efficient audio transcription and summary generation. This article will delve into Distill CLI’s functionality, technical advantages, project background, and future development potential.
Amazon CTO Werner Vogels recently launched a personal project called Distill CLI. This open source tool leverages Amazon Transcribe and Amazon Bedrock to generate recording summaries directly from the command line. Distill CLI was written by Vogels in Rust and aims to provide an automated way to transcribe and aggregate media files. It uses Amazon S3, AWS Lambda, Amazon Transcribe, Amazon Bedrock and AWS CDK to manage the project's infrastructure.

Distllll CLI output example. Source: All Things Distributed Blog
Functions and features
Distill CLI is based on the open source tool Amazon Bedrock Audio Summarizer, which can efficiently process recordings and generate summaries. Users can upload media files and monitor the summarization process through the command line interface, simplifying the process of meeting notes and information extraction. Vogels first mentioned the project in the article "Hacking to Make Team Meetings Better," highlighting its use in improving the note-taking process.
Technical advantages
Vogels shared some of the technology choices and optimization results from the early stages of the project. He said that by rewriting the Lambda function in Rust, the cold start speed increased by 12 times and the memory usage was reduced by 73%. This optimization makes the entire recording summarization process more efficient and reduces the number of writes to S3. Transcripts and summaries are kept in memory, thus improving overall performance.
Distill CLI has a simple user interface that provides status updates and notifies the user of any failures. The tool supports outputting summaries to the terminal and as Word documents, text files, Markdown, and Slack messages, and can process audio files in any language supported by Amazon Transcribe.

The first version of Distill. Source: All Things Distributed Blog
Project background and goals
Vogels said he is always looking for tools and strategies to improve his note-taking process. Although he generally prefers taking notes with pen and paper, he also recognizes the advantages of technology in improving the ability to accumulate information, especially in situations such as meetings that require active participation.
Vogels noted that Distill CLI was initially developed to meet the needs of his team, but he also wanted to challenge himself by learning a new language. This project proves that hands-on experience is an effective way to learn while maintaining curiosity about technology.
By combining recording transcription and summarization capabilities into a simple and efficient tool, Distill CLI provides users with a powerful solution to help them better manage and utilize audio content. With the continuous optimization of projects and improvement of functions, this tool is expected to play an important role in various team collaboration and meeting recording scenarios.
Project address: https://github.com/awslabs/distill-cli/
All in all, Distill CLI, as an efficient audio transcription and summarization tool, provides users with a new way of managing audio content with its simplicity, ease of use, high performance and powerful functions. Its open source feature also makes it easier for developers to improve and expand, and it has huge potential for future development.