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openclaw - 💡(How to fix) Fix Inbound image resize/recompression for Discord (and non-WhatsApp channels) [1 participants]

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openclaw/openclaw#52843•Fetched 2026-04-08 01:18:37
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Problem

When a user sends a large image (e.g. 9MB raw photo) via Discord, it gets passed into the model context at full size. This can cause context window issues — in our case, a 9MB grandpa photo effectively crashed the session.

The WhatsApp channel already has inbound image recompression (resize to max 2048px side, recompress to JPEG, target agents.defaults.mediaMaxMb default 5MB, capped at 6MB) as documented in docs/nodes/images.md. But this pipeline doesn't apply to Discord or other channels.

Expected behavior

All channels should apply the same inbound image resize/recompression before the image hits the model context. The existing WhatsApp logic (max side 2048px, target mediaMaxMb, JPEG recompression) would work perfectly as a universal default.

Current behavior

  • WhatsApp: Images resized and recompressed ✅
  • Discord: Raw images passed through at full size ❌
  • Other channels: Likely same as Discord

Suggested approach

Apply the existing resize pipeline universally to all inbound images, gated by agents.defaults.mediaMaxMb (or per-channel channels.<name>.mediaMaxMb). This is already implemented for WhatsApp — just needs to be generalized.

Environment

  • OpenClaw version: 2026.3.13
  • Channel: Discord
  • Trigger: 9MB JPEG image sent via Discord DM/channel

extent analysis

Fix Plan

To apply the existing resize pipeline universally to all inbound images, follow these steps:

  • Update the image processing pipeline to use the agents.defaults.mediaMaxMb setting for all channels.
  • Add a check to apply the resize and recompression logic to all incoming images, regardless of the channel.

Example code changes:

# Get the media max MB setting
media_max_mb = agents.defaults.mediaMaxMb

# Define the image resize and recompression function
def resize_and_recompress(image):
    # Resize the image to max 2048px side
    image = image.resize((min(2048, image.width), min(2048, image.height)))
    # Recompress the image to JPEG with target size
    image = image.convert('RGB')
    image.save('image.jpg', 'JPEG', quality=int(100 * (media_max_mb / (image.width * image.height * 3 / 1024 / 1024))))
    return image

# Apply the resize and recompression logic to all incoming images
def process_incoming_image(image, channel):
    # Check if the image needs to be resized and recompressed
    if image.size > media_max_mb * 1024 * 1024:
        image = resize_and_recompress(image)
    return image
  • Update the channel-specific code to use the process_incoming_image function:
# Discord channel
def discord_process_image(image):
    return process_incoming_image(image, 'discord')

# WhatsApp channel
def whatsapp_process_image(image):
    return process_incoming_image(image, 'whatsapp')

# Other channels
def other_channel_process_image(image, channel):
    return process_incoming_image(image, channel)

Verification

To verify that the fix worked, test the image resize and recompression logic with different image sizes and channels. Check that the resized and recompressed images are correctly processed and passed to the model context.

Extra Tips

  • Make sure to update the agents.defaults.mediaMaxMb setting to the desired value.
  • Consider adding logging and error handling to the image resize and recompression logic to handle any issues that may arise.
  • Test the fix with different image formats and sizes to ensure that it works correctly in all scenarios.

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FAQ

Expected behavior

All channels should apply the same inbound image resize/recompression before the image hits the model context. The existing WhatsApp logic (max side 2048px, target mediaMaxMb, JPEG recompression) would work perfectly as a universal default.

#api#ssr#batch processing#GPU compatibility#latency issue

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openclaw - 💡(How to fix) Fix Inbound image resize/recompression for Discord (and non-WhatsApp channels) [1 participants]