Multimodal dataprep (opea-project#575)

* multimodal embedding for MM RAG for videos

Signed-off-by: Tiep Le <[email protected]>

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* develop data prep first commit

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* develop dataprep microservice for multimodal data

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* multimodal langchain for dataprep

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* update README

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* update README

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* update README

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* update README

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* cosmetic

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* test for multimodal dataprep

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* update test

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* update test

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* update test

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* cosmetic update

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* remove langsmith

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* update API to remove /dataprep from API names and remove langsmith

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* update test

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* update the error message per PR reviewer

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---------

Signed-off-by: Tiep Le <[email protected]>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

comps/__init__.py

@@ -19,6 +19,10 @@
     GraphDoc,
     LVMDoc,
     LVMVideoDoc,
+    ImageDoc,
+    TextImageDoc,
+    MultimodalDoc,
+    EmbedMultimodalDoc,
 )
 
 # Constants

comps/cores/proto/docarray.py

@@ -6,7 +6,7 @@
 import numpy as np
 from docarray import BaseDoc, DocList
 from docarray.documents import AudioDoc, VideoDoc
-from docarray.typing import AudioUrl
+from docarray.typing import AudioUrl, ImageUrl
 from pydantic import Field, conint, conlist, field_validator
 
 
@@ -17,7 +17,30 @@ class TopologyInfo:
 
 
 class TextDoc(BaseDoc, TopologyInfo):
-    text: str
+    text: str = None
+
+
+class ImageDoc(BaseDoc):
+    url: Optional[ImageUrl] = Field(
+        description="The path to the image. It can be remote (Web) URL, or a local file path",
+        default=None,
+    )
+    base64_image: Optional[str] = Field(
+        description="The base64-based encoding of the image",
+        default=None,
+    )
+
+
+class TextImageDoc(BaseDoc):
+    image: ImageDoc = None
+    text: TextDoc = None
+
+
+MultimodalDoc = Union[
+    TextDoc,
+    ImageDoc,
+    TextImageDoc,
+]
 
 
 class Base64ByteStrDoc(BaseDoc):
@@ -43,6 +66,18 @@ class EmbedDoc(BaseDoc):
     score_threshold: float = 0.2
 
 
+class EmbedMultimodalDoc(EmbedDoc):
+    # extend EmbedDoc with these attributes
+    url: Optional[ImageUrl] = Field(
+        description="The path to the image. It can be remote (Web) URL, or a local file path.",
+        default=None,
+    )
+    base64_image: Optional[str] = Field(
+        description="The base64-based encoding of the image.",
+        default=None,
+    )
+
+
 class Audio2TextDoc(AudioDoc):
     url: Optional[AudioUrl] = Field(
         description="The path to the audio.",

comps/dataprep/multimodal_utils.py

@@ -0,0 +1,258 @@
+# Copyright (C) 2024 Intel Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+import base64
+import json
+import os
+import uuid
+from pathlib import Path
+from typing import Iterator
+
+import cv2
+import requests
+import webvtt
+import whisper
+from moviepy.editor import VideoFileClip
+
+
+def create_upload_folder(upload_path):
+    """Create a directory to store uploaded video data."""
+    if not os.path.exists(upload_path):
+        Path(upload_path).mkdir(parents=True, exist_ok=True)
+
+
+def load_json_file(file_path):
+    """Read contents of json file."""
+    with open(file_path, "r") as file:
+        data = json.load(file)
+    return data
+
+
+def clear_upload_folder(upload_path):
+    """Clear the upload directory."""
+    for root, dirs, files in os.walk(upload_path, topdown=False):
+        for file in files:
+            file_path = os.path.join(root, file)
+            os.remove(file_path)
+        for dir in dirs:
+            dir_path = os.path.join(root, dir)
+            os.rmdir(dir_path)
+
+
+def generate_video_id():
+    """Generates a unique identifier for a video file."""
+    return str(uuid.uuid4())
+
+
+def convert_video_to_audio(video_path: str, output_audio_path: str):
+    """Converts video to audio using MoviePy library that uses `ffmpeg` under the hood.
+
+    :param video_path: file path of video file (.mp4)
+    :param output_audio_path: file path of audio file (.wav) to be created
+    """
+    video_clip = VideoFileClip(video_path)
+    audio_clip = video_clip.audio
+    audio_clip.write_audiofile(output_audio_path)
+    video_clip.close()
+    audio_clip.close()
+
+
+def load_whisper_model(model_name: str = "base"):
+    """Load a whisper model for generating video transcripts."""
+    return whisper.load_model(model_name)
+
+
+def extract_transcript_from_audio(whisper_model, audio_path: str):
+    """Generate transcript from audio file.
+
+    :param whisper_model: a pre-loaded whisper model object
+    :param audio_path: file path of audio file (.wav)
+    """
+    options = dict(task="translate", best_of=5, language="en")
+    return whisper_model.transcribe(audio_path, **options)
+
+
+def format_timestamp_for_transcript(seconds: float, always_include_hours: bool = True, fractionalSeperator: str = "."):
+    """Format timestamp for video transcripts."""
+    milliseconds = round(seconds * 1000.0)
+
+    hours = milliseconds // 3_600_000
+    milliseconds -= hours * 3_600_000
+
+    minutes = milliseconds // 60_000
+    milliseconds -= minutes * 60_000
+
+    seconds = milliseconds // 1_000
+    milliseconds -= seconds * 1_000
+
+    hours_marker = f"{hours:02d}:" if always_include_hours or hours > 0 else ""
+    return f"{hours_marker}{minutes:02d}:{seconds:02d}{fractionalSeperator}{milliseconds:03d}"
+
+
+def write_vtt(transcript: Iterator[dict], vtt_path: str):
+    """Write transcripts to a .vtt file."""
+    with open(vtt_path, "a") as file:
+        file.write("WEBVTT\n\n")
+        for segment in transcript["segments"]:
+            text = (segment["text"]).replace("-->", "->")
+            file.write(
+                f"{format_timestamp_for_transcript(segment['start'])} --> {format_timestamp_for_transcript(segment['end'])}\n"
+            )
+            file.write(f"{text.strip()}\n\n")
+
+
+def delete_audio_file(audio_path: str):
+    """Delete audio file after extracting transcript."""
+    os.remove(audio_path)
+
+
+def time_to_frame(time: float, fps: float):
+    """Convert time in seconds into frame number."""
+    return int(time * fps - 1)
+
+
+def str2time(strtime: str):
+    """Get time in seconds from string."""
+    strtime = strtime.strip('"')
+    hrs, mins, seconds = [float(c) for c in strtime.split(":")]
+
+    total_seconds = hrs * 60**2 + mins * 60 + seconds
+
+    return total_seconds
+
+
+def convert_img_to_base64(image):
+    "Convert image to base64 string"
+    _, buffer = cv2.imencode(".jpg", image)
+    encoded_string = base64.b64encode(buffer)
+    return encoded_string.decode()
+
+
+def extract_frames_and_annotations_from_transcripts(video_id: str, video_path: str, vtt_path: str, output_dir: str):
+    """Extract frames (.jpg) and annotations (.json) from video file (.mp4) and captions file (.vtt)"""
+    # Set up location to store frames and annotations
+    os.makedirs(output_dir, exist_ok=True)
+    os.makedirs(os.path.join(output_dir, "frames"), exist_ok=True)
+
+    # Load video and get fps
+    vidcap = cv2.VideoCapture(video_path)
+    fps = vidcap.get(cv2.CAP_PROP_FPS)
+
+    # read captions file
+    captions = webvtt.read(vtt_path)
+
+    annotations = []
+    for idx, caption in enumerate(captions):
+        start_time = str2time(caption.start)
+        end_time = str2time(caption.end)
+
+        mid_time = (end_time + start_time) / 2
+        text = caption.text.replace("\n", " ")
+
+        frame_no = time_to_frame(mid_time, fps)
+        mid_time_ms = mid_time * 1000
+        vidcap.set(cv2.CAP_PROP_POS_MSEC, mid_time_ms)
+        success, frame = vidcap.read()
+
+        if success:
+            # Save frame for further processing
+            img_fname = f"frame_{idx}"
+            img_fpath = os.path.join(output_dir, "frames", img_fname + ".jpg")
+            cv2.imwrite(img_fpath, frame)
+
+            # Convert image to base64 encoded string
+            b64_img_str = convert_img_to_base64(frame)
+
+            # Create annotations for frame from transcripts
+            annotations.append(
+                {
+                    "video_id": video_id,
+                    "video_name": os.path.basename(video_path),
+                    "b64_img_str": b64_img_str,
+                    "caption": text,
+                    "time": mid_time_ms,
+                    "frame_no": frame_no,
+                    "sub_video_id": idx,
+                }
+            )
+
+    # Save transcript annotations as json file for further processing
+    with open(os.path.join(output_dir, "annotations.json"), "w") as f:
+        json.dump(annotations, f)
+
+    vidcap.release()
+    return annotations
+
+
+def use_lvm(endpoint: str, img_b64_string: str, prompt: str = "Provide a short description for this scene."):
+    """Generate image captions/descriptions using LVM microservice."""
+    inputs = {"image": img_b64_string, "prompt": prompt, "max_new_tokens": 32}
+    response = requests.post(url=endpoint, data=json.dumps(inputs))
+    print(response)
+    return response.json()["text"]
+
+
+def extract_frames_and_generate_captions(
+    video_id: str, video_path: str, lvm_endpoint: str, output_dir: str, key_frame_per_second: int = 1
+):
+    """Extract frames (.jpg) and annotations (.json) from video file (.mp4) by generating captions using LVM microservice."""
+    # Set up location to store frames and annotations
+    os.makedirs(output_dir, exist_ok=True)
+    os.makedirs(os.path.join(output_dir, "frames"), exist_ok=True)
+
+    # Load video and get fps
+    vidcap = cv2.VideoCapture(video_path)
+    fps = vidcap.get(cv2.CAP_PROP_FPS)
+
+    annotations = []
+    hop = round(fps / key_frame_per_second)
+    curr_frame = 0
+    idx = -1
+
+    while True:
+        ret, frame = vidcap.read()
+        if not ret:
+            break
+
+        if curr_frame % hop == 0:
+            idx += 1
+
+            mid_time = vidcap.get(cv2.CAP_PROP_POS_MSEC)
+            mid_time_ms = mid_time * 1000
+
+            frame_no = curr_frame
+            frame = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
+
+            # Save frame for further processing
+            img_fname = f"frame_{idx}"
+            img_fpath = os.path.join(output_dir, "frames", img_fname + ".jpg")
+            cv2.imwrite(img_fpath, frame)
+
+            # Convert image to base64 encoded string
+            b64_img_str = convert_img_to_base64(frame)
+
+            # Caption generation using LVM microservice
+            caption = use_lvm(lvm_endpoint, b64_img_str)
+            caption = caption.strip()
+            text = caption.replace("\n", " ")
+
+            # Create annotations for frame from transcripts
+            annotations.append(
+                {
+                    "video_id": video_id,
+                    "video_name": os.path.basename(video_path),
+                    "b64_img_str": b64_img_str,
+                    "caption": text,
+                    "time": mid_time_ms,
+                    "frame_no": frame_no,
+                    "sub_video_id": idx,
+                }
+            )
+
+        curr_frame += 1
+
+    # Save caption annotations as json file for further processing
+    with open(os.path.join(output_dir, "annotations.json"), "w") as f:
+        json.dump(annotations, f)
+
+    vidcap.release()

comps/dataprep/redis/README.md

@@ -1,6 +1,8 @@
 # Dataprep Microservice with Redis
 
-For dataprep microservice, we provide two frameworks: `Langchain` and `LlamaIndex`. We also provide `Langchain_ray` which uses ray to parallel the data prep for multi-file performance improvement(observed 5x - 15x speedup by processing 1000 files/links.).
+We have provided dataprep microservice for multimodal data input (e.g., text and image) [here](multimodal_langchain/README.md).
+
+For dataprep microservice for text input, we provide here two frameworks: `Langchain` and `LlamaIndex`. We also provide `Langchain_ray` which uses ray to parallel the data prep for multi-file performance improvement(observed 5x - 15x speedup by processing 1000 files/links.).
 
 We organized these two folders in the same way, so you can use either framework for dataprep microservice with the following constructions.