海康摄像头抓图
curl --insecure --anyauth -u admin:password -X GET http://admin:password@192.168.110.19/ISAPI/Streaming/channels/110/picture >d:/b.jpg
海康RTSP流
rtsp://admin:password@192.168.110.19:554/Streaming/Channels/201
ffmpeg压缩海康录像文件 压缩率大概 15%
ffmpeg -i Downtest_ch0001_00000003678000000.mp4 -c:v libx264 -crf 28 -preset veryfast -c:a copy -movflags +faststart output.mp4 -y
JS Video截图上传代码
// 视频绘制canvas画布、截图上传 function canvasUpload() { let v = $('video')[0]; let canvas = document.createElement("canvas"); canvas.width = v.videoWidth; canvas.height = v.videoHeight; let ctx = canvas.getContext("2d"); ctx.drawImage(v, 0, 0, canvas.width, canvas.height); // document.body.appendChild(canvas); let imgSrc = canvas.toDataURL("image/jpeg", 0.8); $('#img1').prop('src', imgSrc); //获取裁剪完后的base64图片url,转换为blob var data = imgSrc; var formData = new FormData(); formData.append("img_file", dataURLtoBlob(data)); var httprequest = null; if (window.XMLHttpRequest) { httprequest = new XMLHttpRequest(); } else { httprequest = new ActiveXObject('MicroSoft.XMLHTTP'); } var apiurl = "save.php?sn=" + $('#txtSn').val(); //上传图片的api接口,自行填写 httprequest.open('POST', apiurl, true); httprequest.send(formData); httprequest.onreadystatechange = function () { if (httprequest.readyState == 4) { if (httprequest.status == 200) { console.log('上传成功'); } else { console.error('获取数据错误,错误代码:' + httprequest.status + '错误信息:' + httprequest.statusText); } } }; } //把base64位的toDataURL图片转换成blob function dataURLtoBlob(dataurl) { var arr = dataurl.split(','), mime = arr[0].match(/:(.*?);/)[1], bstr = atob(arr[1]), n = bstr.length, u8arr = new Uint8Array(n); while (n--) { u8arr[n] = bstr.charCodeAt(n); } return new Blob([u8arr], { type: mime }); }