Error: gl returned null (missing dependencies)

[maerics]

While attempting to run the "kenBurns" example in a Debian docker image (using a node:14-stretch base image) I get the following error:

640x640 25fps
Error: gl returned null, this probably means that some dependencies are not installed. See README.
    at module.exports (/usr/local/lib/node_modules/editly/glTransitions.js:12:11)
    at module.exports (/usr/local/lib/node_modules/editly/index.js:265:36)
    at processTicksAndRejections (internal/process/task_queues.js:97:5)
    at async /usr/local/lib/node_modules/editly/cli.js:124:3

For reference, here's the Dockerfile I'm using:

FROM node:14-stretch

RUN apt-get -qq update \
  && apt-get -qq install \
    build-essential \
    libcairo2-dev \
    libpango1.0-dev \
    libjpeg-dev \
    libgif-dev \
    librsvg2-dev \
    libxi-dev \
    libglu1-mesa-dev \
    libglew-dev \
    pkg-config \
    python2.7 \
    python-pip \
    ffmpeg

RUN mkdir -p /opt/node \
  && cd /opt/node \
  && npm install --global --unsafe-perm editly

[chapmanjacobd]

maybe you need xvfb

[maerics]

No change after installing that package, still seeing the same error

[chapmanjacobd]

https://github.com/thewtex/docker-opengl/blob/master/Dockerfile
https://github.com/jamesbrink/docker-opengl#docker-images
https://hub.docker.com/r/jamesbrink/opengl/dockerfile

it looks like a minimal install might be a little bit complicated

[maerics]

Looks like any sort of docker install might be complicated! 😛

[mifi]

If you find a way to do it, then it would be nice if u put together a list of working instructions (or a link), then we can put it in the readme 👍

[Stefan-Hanke]

Merely installing xvfb just... installs it. However it is not running. I've used the instructions found here

xvfb-run -s "-ac -screen 0 1280x1024x24" <node program>

Using that command results in e.g. xvfb-run -s "-ac -screen 0 1280x1024x24" editly --json kenBurns.json5 which now complains about assets not found.

BTW I find it unfortunate that there are no sample assets. Makes it harder to play around with it.

[maerics]

@Stefan-Hanke great find, that command prefix does the trick! I'll submit a PR with the dockerfile and instructions in the readme. If we could get those assets in this repo then the examples could just work (tm) out of the box...

[mifi]

Good job!

I don't want to include the sample assets in this repository because they are quite huge and I don't want everyone who downloads the repo to have to download hundreds of megabytes. But I'm thinking about putting them in a separate github repo and then having a download script from here.

[over9001]

I'm thinking about putting them in a separate github repo and then having a download script from here
Yes please!

[MDrooker]

I did get further along with this Docker File...But now its failing when FFMPEG tries to write out to the temp dir-
Hope this helps someone

FROM node:14.7
# FROM nikolaik/python-nodejs:latest
RUN apt-get update && apt-get install -y \
    libcairo2-dev \
    libpango1.0-dev \
    libjpeg-dev \
    libgif-dev \
    librsvg2-dev \
    libxi-dev \
    libglu1-mesa-dev \
    libglew-dev \
    python2.7 \
    python-pip \
    ffmpeg \
    xvfb
# Create app directory
RUN mkdir -p /usr/src/app
WORKDIR /usr/src/app
# #
# ## Install app dependencies
COPY package.json /usr/src/app/

RUN npm install
ADD https://github.com/Yelp/dumb-init/releases/download/v1.2.0/dumb-init_1.2.0_amd64 /usr/bin/dumb-init
RUN chmod 0777 /usr/bin/dumb-init

# Bundle app source
COPY . /usr/src/app

ENTRYPOINT ["/usr/bin/dumb-init", "--", "xvfb-run", "-s", "-ac -screen 0 1280x1024x24"]
CMD [ "node", "source/startup.js" ]

[glebteterin]

@MDrooker your configuration works for me just fine

[MDrooker]

Yea...Mine is still tossing errors on creating the asset.

[srameshr]

Using xvfb-run -s '-screen 0 1024x768x24 -ac +extension GLX +render -noreset' node index.js fails with an out of memory error if the video is 720P in width.

[dinesh-rawat-dev]

640x640 25fps
(node:19147) UnhandledPromiseRejectionWarning: Error: gl returned null, this probably means that some dependencies are not installed. See README.
    at module.exports (/home/ubuntu/backend/node_modules/editly/glTransitions.js:12:11)
    at module.exports (/home/ubuntu/backend/node_modules/editly/index.js:347:36)
(node:19147) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:19147) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

I am also struglling this issue in ubuntu 18