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Fix llama.cpp media marker

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This commit is contained in:
Nicolas Mowen 2026-04-29 08:43:32 -06:00
parent 3201985359
commit 11bb9fed4c
1 changed files with 12 additions and 2 deletions
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14
frigate/genai/llama_cpp.py
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@ -44,6 +44,7 @@ class LlamaCppClient(GenAIClient):
_supports_tools: bool
_image_token_cache: dict[tuple[int, int], int]
_text_baseline_tokens: int | None
_media_marker: str
def _init_provider(self) -> str | None:
"""Initialize the client and query model metadata from the server."""
@ -56,6 +57,7 @@ class LlamaCppClient(GenAIClient):
self._supports_tools = False
self._image_token_cache = {}
self._text_baseline_tokens = None
self._media_marker = "<__media__>"
base_url = (
self.genai_config.base_url.rstrip("/")
@ -141,6 +143,13 @@ class LlamaCppClient(GenAIClient):
chat_caps = props.get("chat_template_caps", {})
self._supports_tools = chat_caps.get("supports_tools", False)
# Media marker for multimodal embeddings; the server randomizes this
# per startup unless LLAMA_MEDIA_MARKER is set, so we must read it
# from /props rather than hardcoding "<__media__>".
media_marker = props.get("media_marker")
if isinstance(media_marker, str) and media_marker:
self._media_marker = media_marker
logger.info(
"llama.cpp model '%s' initialized — context: %s, vision: %s, audio: %s, tools: %s",
configured_model,
@ -465,10 +474,11 @@ class LlamaCppClient(GenAIClient):
jpeg_bytes = _to_jpeg(img)
to_encode = jpeg_bytes if jpeg_bytes is not None else img
encoded = base64.b64encode(to_encode).decode("utf-8")
# prompt_string must contain <__media__> placeholder for image tokenization
# prompt_string must contain the server's media marker placeholder.
# The marker is randomized per server startup (read from /props).
content.append(
{
"prompt_string": "<__media__>\n",
"prompt_string": f"{self._media_marker}\n",
"multimodal_data": [encoded], # type: ignore[dict-item]
}
)