前言
Django上传视频跟Java类似，将在后台将视频文件以二进制储存即可，需要注意的是前端上传文件需要将表单设置属性为enctype="multipart/form-data"。本例使用Django作为后台，实现了将前端视频文件保存至本地，并使用OpenCV对视频的第一帧截取保存至另一目录。
代码
前端
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<form class="form-horizontal" action="{% url 'upload' %}" method="post"
enctype="multipart/form-data" onsubmit="return false;">
{% csrf_token %}
<div class="form-group">
<div class="col-xs-12">
<input type="file" id="example-file-input" name="file">
</div>
</div>
<div class="form-group">
<div class="col-md-9 col-md-offset-3">
<button type="button" class="btn btn-default" data-dismiss="modal">取消</button>
<button type="submit" class="btn btn-primary">点击上传</button>
</div>
</div>
</form>
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urls.py
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from django.urls import path
from . import views
urlpatterns = [
path('', views.main),
path('main', views.main, name='main'),
path('upload', views.upload, name='upload'),
]
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views.py
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from django.shortcuts import redirect, render
from django.http import HttpResponse
from django.conf import settings
from django.urls import reverse
import cv2
import random
import datetime
import os
import json
def upload(request):
if request.method == 'POST':
base_dir = settings.BASE_DIR
file = request.FILES.get("file")
# 视频保存目录
video_path = os.path.join(base_dir, "main/static/main/videos".replace('/', os.path.sep))
video_name = datetime.datetime.now().strftime("%Y%m%d%H%M%S") + str(random.randint(1, 99)) + file.name.split('.')[0]
video_abs_path = os.path.join(video_path, video_name + '.' + file.name.split('.')[-1])
try:
with open(video_abs_path, 'wb+') as f:
f.write(file.read())
except Exception:
result = {"code": '500', 'information': '文件写入错误！'}
return HttpResponse(json.dumps(result, ensure_ascii=False))
# 视频截取
vc = cv2.VideoCapture(video_abs_path)
if vc.isOpened(): # 判断是否正常打开
_, frame = vc.read()
thumbnail_abs_path = os.path.join(video_path, "thumbnail", video_name) + ".jpg"
print(thumbnail_abs_path)
cv2.imwrite(thumbnail_abs_path, frame) # 存储为图像
cv2.imencode('.jpg', frame)[1].tofile(thumbnail_abs_path)
cv2.waitKey(1)
vc.release()
return redirect(reverse('crack_detection'))
else:
result = {"code": '500', 'information': '视频无法正常打开！'}
return HttpResponse(json.dumps(result, ensure_ascii=False))
else:
result = {"code": '500', 'information': '请求方式错误'}
return HttpResponse(json.dumps(result, ensure_ascii=False))
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效果
前端
后台
