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.

NotebookLM Error: Problem with Uploading YouTube URL

Problem Description:

When attempting to upload YouTube URL to NotebookLM, users encounter the error message: "Something went wrong, Please try again later."

Known Causes:

Based on user reports, this error typically occurs with:

• Videos that are too recent
• Non-public or private videos
• Content with access restrictions

Workarounds Solutions:

1. Convert video to transcript:

• Extract text content from video using openai/whisper: Robust Speech Recognition via Large-Scale Weak Supervision or othe Speech-To-Text tools
• Upload the resulting transcript file to NotebookLM

2. Convert video to images, then to PDF:

• Extract video frames as individual images
• Compile images into a single PDF document
• Upload the PDF to NotebookLM using Web Video Frame Toolkit provides both conversion options mentioned above.

NotebookLM Error: Excel File Format Not Supported

Problem Description:

When attempting to upload an Excel file directly to NotebookLM, users encounter an error due to unsupported file format.

Workaround Solution:

1. Upload via Google Drive:

• Upload the Excel file to Google Drive
• Return to NotebookLM and select Google Drive as the source
• Choose the previously uploaded Excel file

Known Limitations:

• Large files may still fail to import even via Google Drive
• Files of 4MB or larger are known to cause import issues

If Import Still Fails:

• Reduce the number of data rows
• Remove unnecessary columns to decrease file size

NotebookLM Error: SRT File Format Not Supported

Problem Description: When attempting to upload an SRT ((SubRip Subtitle file) directly to NotebookLM, users encounter an error due to unsupported file format.

Workaround Solution:: Rename File Extension

1. Locate the SRT file on your device
2. Rename the file extension from .srt to .txt
3. Upload the renamed .txt file directly to NotebookLM

Why This Works:

• SRT is a plain text format — changing the extension does not alter the content
• NotebookLM accepts .txt files, so renaming allows the file to pass format validation

Further reading

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