尝试读取多个 mp4 文件并使用 FastAPI 的 StreamingResponse 通过相同的 HTTP 端点将它们一个接一个地串联起来。然而，这两种方法都没有产生预期的结果。我想我需要将每个 mp4 生成为原子块而不是整个文件？有什么想法吗？
服务器.py
import uvicorn
from fastapi import FastAPI
from fastapi.responses import StreamingResponse
import os
import cv2
app = FastAPI()
# PROBLEM: Stops after first mp4 played
def read_multiple_files_as_one():
count = 0
for file_name in os.listdir('./examples'):
if file_name.endswith(".mp4"):
with open('./examples/' + file_name, 'rb') as f_in:
# video = f_in.read()
yield from f_in
@app.get("/video")
async def main():
return StreamingResponse(read_multiple_files_as_one(), media_type="video/mp4")
# PROBLEM: Wrong frame rate
# PROBLEM: No sound
def read_multiple_files_as_one_2():
count = 0
for file_name in os.listdir('./examples'):
if file_name.endswith(".mp4"):
cam = cv2.VideoCapture(
'./examples/' + file_name)
while True:
success, frame = cam.read()
if not success:
break
else:
ret, buffer = cv2.imencode('.jpg', frame)
frame = buffer.tobytes()
count +=1
# print(f'frame #: {count}')
yield (b'--frame\r\n'
b'Content-Type: image/jpeg\r\n\r\n' + frame + b'\r\n')
@app.get("/video2")
async def main():
return StreamingResponse(read_multiple_files_as_one_2(), media_type="multipart/x-mixed-replace;boundary=frame")
if __name__ == "__main__":
uvicorn.run(app, host="0.0.0.0", port=8000)
index.html:
<!DOCTYPE html>
<html>
<head></head>
<body>
<video width="1280" height="720" autoplay controls muted>
<source src="http://localhost:8000/video" type="video/mp4" />
</video>
<img src="http://localhost:8000/video2" />
</body>
</html>