ATH-MaaS/Pixelle-Video · error · RuntimeError

DashScope image generation returned no image URLs. output={g

Error message

DashScope image generation returned no image URLs. output={getattr(response, 'output', None)}

What it means

When DashScope returns HTTP status 200 but _extract_image_urls finds no image URLs in response.output, generate_image raises this RuntimeError — the call nominally succeeded but contained no usable image results.

Source

Thrown at pixelle_video/services/api_services/image_dashscope.py:116

        if ImageGeneration is None:
            raise RuntimeError("dashscope package not installed. Run: pip install dashscope")

        try:
            messages = [{"role": "user", "content": [{"text": prompt}]}]
            with self._proxy_env():
                response = ImageGeneration.call(
                    model=model,
                    api_key=self.api_key,
                    messages=messages,
                    n=n,
                    size=size,
                    watermark=False,
                )

            if response.status_code == 200:
                results = self._extract_image_urls(getattr(response, "output", None))
                if not results:
                    raise RuntimeError(f"DashScope image generation returned no image URLs. output={getattr(response, 'output', None)}")
                
                # Check if we should download
                if save_dir:
                    os.makedirs(save_dir, exist_ok=True)
                    local_files = []
                    for i, url in enumerate(results):
                        file_name = f"ds_{session_id if session_id else 'nosess'}_{int(time.time())}_{i}_{uuid.uuid4().hex[:6]}.png"
                        file_path = os.path.join(save_dir, file_name)
                        if self.image_processor.download_image(url, file_path):
                            local_files.append(file_path)
                    return local_files
                
                return results
            else:
                raise RuntimeError(f"Image generation failed: {response.code}, {response.message}, status={response.status_code}")
        except Exception as e:
            logging.error(f"Error in generate_image (DashScope): {e}")
            raise

View on GitHub (pinned to 848b054e4f)

Solutions

Log response.output to inspect the actual structure
Update the dashscope SDK to match the current API response schema
Retry the generation; check account quotas/content policy
Adjust _extract_image_urls parsing to handle the observed output shape

Example fix

// before
results = self._extract_image_urls(response.output)
// after
results = self._extract_image_urls(response.output)
if not results:
    logging.warning("empty output: %s", response.output)
    results = self._extract_image_urls(getattr(response.output, 'results', None) or response.output)

Defensive patterns

Strategy: retry

Validate before calling

results = gen.generate_image(prompt=p, save_dir=out)
if not results:
    raise RuntimeError("no images produced; check response.output")

Try / catch

for attempt in range(3):
    try:
        return gen.generate_image(prompt=p)
    except RuntimeError as e:
        if "no image URLs" in str(e) and attempt < 2:
            time.sleep(2 ** attempt)
            continue
        raise

Prevention

Log response.output on every empty result
Update dashscope SDK when API schemas change
Check quotas and content policy for silent-empty behavior

When it happens

Trigger: Provider returns 200 with an empty/unexpected output structure; task still pending with no results; response schema changed after an SDK/API update; prompt yielded zero generations.

Common situations: DashScope API version drift; async generation polled too early; account restrictions returning empty results; logging the output shows output.results missing or empty.

Related errors

AI-assisted analysis of ATH-MaaS/Pixelle-Video@848b054e4f (2026-08-30). Data as JSON: /api/errors/e8a30a5b438c69cf. Report an issue: GitHub.