Getting Rendi to work with n8n

[ivcained]

When I try to do the demo requests in quick start, I get the error:
Bad request - please check your parameters
Command must contain '{{' and '}}' or '{{' and '}}' for input and output files. Please send the request as instructed in the API reference https://docs.rendi.dev/api-reference/endpoint/run-ffmpeg-command.

Can you please help me with some documentation that is specific for n8n? I'm also having a discussion about this [here] (https://farcaster.xyz/ivc/0xeee7ba58)

[peternaf]

Hi!
We are actually going to release a youtube video this week that explains how to integrate rendi.

Regarding your specific issue, it seems that you are hitting the curly brackets issue with n8n. Strings of structure "{{..}}" are special strings in n8n, and therefore are not sent correctly to rendi.
In order to solve for this, you just need to use backslashes. So "\{\{....\}\}" should work. In case you are writing a JSON string in n8n, you might need to use double backslashes (so that the JSON will recognize the special character '') - it will look like this "\\{\\{....\\}\\}"

Let us know if this solved your issue

[ivcained]

So, Something like this?

{
"input_files": {
"in_img_1": "{{ $json.body.data.author.pfp_url }}",
"in_img_2": "https://storage.rendi.dev/sample/rodents.png",
"in_img_3": "https://storage.rendi.dev/sample/evil-frank.png",
"in_audio_1": "https://storage.rendi.dev/sample/Neon%20Lights.mp3"
},
"output_files": {
"out_1": "output.mp4"
},
"ffmpeg_command": "-loop 1 -t 5 -i \{\{in_img_1\}\} -loop 1 -t 5 -i \{\{in_img_2\}\} -loop 1 -t 5 -i \{\{in_img_3\}\} -i \{\{in_audio_1\}\} -filter_complex "[0:v][1:v][2:v]concat=n=3:v=1:a=0,format=yuv420p[v]" -map [v] -map 3:a -c:v libx264 -c:a aac -shortest \{\{out_1\}\}"
}

[peternaf]

Correct
Again, you might need to use double backslashes \\{\\{in_img_1\\}\\}

[Just realized github's text editor also removes double backslashes, so needed to edit the text so it will appear right]

[ivcained]

I get an error "JSON parameter needs to be valid JSON"

NodeOperationError: JSON parameter needs to be valid JSON at ExecuteContext.execute (/usr/local/lib/node_modules/n8n/node_modules/.pnpm/n8n-nodes-base@file+packages+nodes-base_@aws-sdk+credential-providers@3.808.0_asn1.js@5_1af219c3f47f2a1223ec4ccec249a974/node_modules/n8n-nodes-base/nodes/HttpRequest/V3/HttpRequestV3.node.ts:366:15) at WorkflowExecute.executeNode (/usr/local/lib/node_modules/n8n/node_modules/.pnpm/n8n-core@file+packages+core_@opentelemetry+api@1.9.0_@opentelemetry+sdk-trace-base@1.30_5aee33ef851c7de341eb325c6a25e0ff/node_modules/n8n-core/src/execution-engine/workflow-execute.ts:1253:31) at WorkflowExecute.runNode (/usr/local/lib/node_modules/n8n/node_modules/.pnpm/n8n-core@file+packages+core_@opentelemetry+api@1.9.0_@opentelemetry+sdk-trace-base@1.30_5aee33ef851c7de341eb325c6a25e0ff/node_modules/n8n-core/src/execution-engine/workflow-execute.ts:1427:22) at /usr/local/lib/node_modules/n8n/node_modules/.pnpm/n8n-core@file+packages+core_@opentelemetry+api@1.9.0_@opentelemetry+sdk-trace-base@1.30_5aee33ef851c7de341eb325c6a25e0ff/node_modules/n8n-core/src/execution-engine/workflow-execute.ts:1727:38 at processTicksAndRejections (node:internal/process/task_queues:105:5) at /usr/local/lib/node_modules/n8n/node_modules/.pnpm/n8n-core@file+packages+core_@opentelemetry+api@1.9.0_@opentelemetry+sdk-trace-base@1.30_5aee33ef851c7de341eb325c6a25e0ff/node_modules/n8n-core/src/execution-engine/workflow-execute.ts:2303:11

[peternaf]

Please send a printscreen of the n8n module (with the full json) along with the error message next to it

[ivcained]

[Audify copy.json](https://github.com/user-attachments/files/22329442/Audify.copy.json)

[peternaf]

This still doesn't show the full json..

[ivcained]

This still doesn't show the full json..

Sorry, had to resize it.

[ivcained]

This still doesn't show the full json..

Sorry, had to resize it.

[peternaf]

Ok. So, there are no double backslashes inside of the ffmpeg_command section - you need to make sure there appear inside
If you will send a full printscreen, of the entire n8n dashboard (not just the body content type) - it could give more clues

Anyway, this week we will release the n8n and rendi explainer video - you could use it to make sure everything is set correctly.

[ivcained]

Sent you a msg on twitter.
Happy to share the project I'm building in the open with everyone.

[ivcained]

Audify copy.json
Somehow the earlier one doesn't work, reuploaded.