NotebookLM

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Troubleshooting of NotebookLM

NotebookLM Workaround: Large Video to MP3 Conversion

Problem Description:

The original 2.3GB video file exceeded NotebookLM's strict 200MB limit for local uploads. As stated in their official documentation: "The current limit is 500,000 words per source or up to 200MB for local uploads." (每個檔案大小不得超過 200MB)

Solution:

Use FFmpeg to convert the video to MP3 audio. Result: The file size was reduced to 126MB, successfully meeting the limit.

1. Download & install Download FFmpeg

2. Open the terminal

3. Command Used:

ffmpeg -i input_video.mp4 -vn -c:a libmp3lame -q:a 2 output_audio.mp3

Breakdown of flags:

• -i input_video.mp4: The input file.
• -vn: Skips the video stream (No Video).
• -c:a libmp3lame: Specifies the audio codec to use (LAME is standard for MP3).
• -q:a 2: Sets Variable Bit Rate (VBR) quality. 2 averages around 190 kbps (high quality). Use 0 for best quality or 4 for standard.
• output_audio.mp3: The name of the new file.

Further reading

• Add or discover new sources for your notebook - Computer - NotebookLM Help