Preview endpoint returning error

[mthsdiniz-usp]

Hey all,

I tried deploying a custom cog route but whenever i try using the preview i'm getting the following error:

{
"detail": "Could not encode array of shape (3,500,500) and of datatype uint8 using PNG driver"
}

Does anyone have any clue of what might be going on ?

I'm using a docker python:alpine base image :

FROM python:3.11-alpine
USER root

RUN pip config set global.trusted-host "pypi.org files.pythonhosted.org pypi.python.org"
RUN pip config set global.timeout 3660

COPY ./requirements.txt /app/requirements.txt
RUN apk add --no-cache build-base \
                       gcc \
                       g++ \
                       libc-dev \
                       musl-dev \
                       linux-headers \
                       geos-dev \
                       gdal-dev \
                       proj-dev \
                       libjpeg-turbo-dev \
                       libpng-dev \
                       jpeg-dev \
                       tiff-dev \
                       curl \
                       gdal \
                       geos 

RUN pip install --no-cache-dir --upgrade -r /app/requirements.txt
#RUN pip uninstall -y redis

# COPY nginx.conf /etc/nginx/nginx.conf
COPY ./app /app
WORKDIR /app

USER 888

ENV HOST 0.0.0.0
ENV PORT 80
CMD uvicorn main:app --host ${HOST} --port ${PORT}

[vincentsarago]

@mthsdiniz-usp It's pretty hard for us to help without reproductible example or more information about your data and the exact request your going through titiler.

I've tried to replicate locally with the info I have and I don't see any issue 🤷

import numpy
from rio_tiler.models import ImageData

im = ImageData(numpy.zeros((3, 500, 500), dtype="uint8"))
im.render(add_mask=False)