mp4 | 易学教程

Recommendation on the best quality/performance H264 encoder for video encoding?

阅读更多关于 Recommendation on the best quality/performance H264 encoder for video encoding?

问题 I am looking for a video encoder that is fast, requires less CPU power and produces very good quality mp4 video. The input videos can be in any format and uploaded by users. Only thing I know is FFMPEG library. Is there anything else that is better? The program must have a batch utility (exe) that I am interested in. I would appreciate if you kindly share your knowledge. Thanks 回答1: Use x264 . It's fast and flexible enough for it to suit your needs. Other H.264 video encoders are junk

Python实战爬虫：爬视频

阅读更多关于 Python实战爬虫：爬视频

爬虫爬视频爬取步骤第一步：获取视频所在的网页第二步：F12中找到视频真正所在的链接第三步：获取链接并转换成二进制第四部：保存保存步骤代码 import re import requests response = requests.get('https://vd4.bdstatic.com/mda-jcrx64vi5vct2d2u/sc/mda-jcrx64vi5vct2d2u.mp4?auth_key=1557734214-0-0-d6a29a90222c6caf233e8a2a34c2e37a&bcevod_channel=searchbox_feed&pd=bjh&abtest=all') video = response.content #把文件保存成二进制 with open(r'D:\图片\绿色.mp4','wb') as fw: fw.write(video) #将文件内容写入该文件 fw.flush() #刷新推荐Python大牛在线分享技术扣qun：855408893 领域：web开发，爬虫，数据分析，数据挖掘，人工智能零基础到项目实战，7天学习上手做项目爬酷6首页的所有视频 #有点偷懒变量名用简单字母啦............. # https://www.ku6.com/index # <a class="video-image-warp"

Parsing H264 in mdat MP4

阅读更多关于 Parsing H264 in mdat MP4

问题 I have a file that only contains the mdat atom in a MP4 container. The data in the mdat contains AVC data. I know the encoding parameters for the data. The format does not appear to be in the Annex B byte stream format. I am wondering how I would go about parsing this. I have tried searching for the slice header, but have not had much luck. Is it possible to parse the slices without the NAL's? 回答1: AVC NAL units are in the following format in MDAT section: [4 bytes] = NAL length, network

How to remove or edit Exif from mp4 video?

阅读更多关于 How to remove or edit Exif from mp4 video?

问题 I recorded a Full HD video with Samsung Galaxy II, when I uploaded it to YouTube I found that it turned to 90 degrees like Portrait layout 1080x1920 NOT 1920x1080. I found the cause of the problem: YouTube is reading video metadata and rotate video acording Exif orientation before encoding This is ExifTool report (please see last tag "Rotation"): ExifTool Version Number : 8.61 File Name : video.mp4 Directory : . File Size : 217 MB File Modification Date/Time : 2011:08:11 00:47:23+04:00 File

ffmpeg: videos before and after conversion aren't the same length

阅读更多关于 ffmpeg: videos before and after conversion aren't the same length

问题 I have a set of .mov videos which require conversion to .mp4 format. I'm using ffmpeg and running this command: ffmpeg -i Banking.mov -vsync -async -sameq -ac 1 -ab 64k -ar 44100 Banking.mp4 There is a slight difference between input and output video in time length (00:03:35.407 and 00:03:35.582). And here's the catch - I'm storing time cue set at precise times in a file which is used by a program to point at specific scenes. The 0.1 second difference causes it to point at wrong scenes,

ffmpeg: videos before and after conversion aren't the same length

阅读更多关于 ffmpeg: videos before and after conversion aren't the same length

html5 video.js 使用及兼容所有浏览器

阅读更多关于 html5 video.js 使用及兼容所有浏览器

废话少说，直接开始一、准备材料　　video.js下载： http://www.videojs.com/ 二、代码　　引入相关文件：（必须放在文件的开头，也是说一定要放在video标签之前）　　　　贴入html代码： <video id="example_video_1" class="video-js" width="640" height="410" controls="controls" autoplay preload="auto" poster="/Images/treatment/reenex2.png"> <source src="/Content/videos/homepage.MP4" type='video/mp4; codecs="avc1.42E01E, mp4a.40.2"' /> <source src="/Content/videos/homepage.oggtheora.ogv" type='video/webm; codecs="vp8, vorbis"' /> <source src="/Content/videos/homepage.webmhd.webm" type='video/ogg; codecs="theora, vorbis"' /> </video> 　　在这里为了兼容不同的浏览器，所以给出了三种视频格式，但问题仍未解决

HTML5 fallback images are being loaded by the browser, even though HTML5 video is supported

阅读更多关于 HTML5 fallback images are being loaded by the browser, even though HTML5 video is supported

问题 I have some HTML5 videos with animated GIFs as fallback. Sadly, the GIFs are being loaded even though HTML5 video is supported. Without using javascript, is there a way to stop the browser from downloading HTML5 fallback content? If not, I will just use jquery but wanted to know if there was a non-js solution. <video> <source src="animation-1.mp4" type="video/mp4"> <img src="animation-1.gif"> </video> <video> <source src="animation-2.mp4" type="video/mp4"> <img src="animation-2.gif"> </video>

How to save a RTSP video stream to MP4 file via gstreamer?

阅读更多关于 How to save a RTSP video stream to MP4 file via gstreamer?

问题 I need to get a video stream from my camera via RTSP and save it to a file. All of this needs to be done via gstreamer. After some google searching, I tried the following: gst-launch-1.0 rtspsrc location=rtsp://192.168.1.184/live2.sdp ! queue ! rtph264depay ! avdec_h264 ! mp4mux ! filesink location=result3.mp4 but it gives the error: "Erroneous pipeline: could not link avdec_h264-0 to mp4mux0" gst-launch-1.0 rtspsrc location=rtsp://192.168.1.184/live2.sdp ! queue ! rtph264depay ! h264parse !

IIS 7.0 doesn't allow download of MP4 videos [closed]

阅读更多关于 IIS 7.0 doesn't allow download of MP4 videos [closed]

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 8 years ago . I hosted some mp4 videos on IIS. Although IIS 7.0 lists the video files, it doesn't allow download of them and a 404 Not Found is returned. 回答1: Check the MIME Types, you will probably have to add it (MP4) to "allow download". 来源： https://stackoverflow.com/questions/6182031/iis-7-0-doesnt-allow-download-of-mp4