mp4

web网络协议详解、抓包

由 心不动则不痛 提交于 2019-12-13 11:07:54
课程介绍.mp4 内容综述.mp4 浏览器发起HTTP请求的典型场景.mp4 基于ABNF语义定义的HTTP消息格式.mp4 网络为什么要分层：OSI模型与TCP-IP模型.mp4 HTTP解决了什么问题？.mp4 评估Web架构的七大关键属性.mp4 从五种架构风格推导出HTTP的REST架构.mp4 如何用Chrome的Network面板分析HTTP报文.mp4 URI的基本格式以及与URL的区别.mp4 为什么要对 URI 进行编码？.mp4 详解 HTTP 的请求行.mp4 HTTP 的正确响应码.mp4 HTTP 的错误响应码.mp4 如何管理跨代理服务器的长短连接？.mp4 HTTP 消息在服务器端的路由.mp4 代理服务器转发消息时的相关头部.mp4 请求与响应的上下文.mp4 内容协商与资源表述.mp4 HTTP包体的传输方式（1）：定长包体.mp4 HTTP包体的传输方式（2）：不定长包体.mp4 HTML form 表单提交时的协议格式.mp4 断点续传与多线程下载是如何做到的？.mp4 Cookie的格式与约束.mp4 Session及第三方Cookie的工作原理.mp4 浏览器的同源策略.mp4 通过CORS实现跨域访问.mp4 条件请求的作用.mp4 缓存的工作原理.mp4 缓存新鲜度的四种计算方式.mp4 复杂的 Cache-Control 头部.mp4

Obtain the duration of a mp4 file [duplicate]

由 一曲冷凌霜 提交于 2019-12-13 09:55:22
问题 This question already has answers here : How to get the duration of a video in Python? (8 answers) Closed 6 years ago . I need to know the duration of a mp4 file with python 3.3. I search and try to do this with enzyme, atom, but i can't find the way to obtain these. Thanks for your time. 回答1: A number of previously answered questions deal with this issue: How to get the duration of a video in Python? Get total length of videos in a particular directory in python Get dimensions of a video

Why Cant i skip ahead on a MP4 video on a web page i made?

由 旧巷老猫 提交于 2019-12-13 08:56:33
问题 I have an Apache server set up and have made a simple web page,with a video on it. The video plays, but if i try to skip ahead or behind it freezes up. If i click the pause/play button it will usually go back to the beginning of the video. The video is MP4 format.It might be worth noting that the video is a rather large file as the video I'm trying to play is a hour long. I've tried smaller files and they seem to play fine and i can seek as much as i want. Also if open the web page locally it

what happen to B-frames?! MP4Box evalvid , JM .264

由 谁都会走 提交于 2019-12-13 08:35:29
问题 I encode an HD video (Beauty.yuv) by JM with IBBBPBBBPBBBP... pattern. then to convert output.264 to out.mp4 by MP4Box do this: MP4Box -profile high -hint -mtu 1024 -fps 30 -add output.264 out.mp4 then I make .st file: ./mp4trace -f -s 192.168.0.2 12346 out.mp4 > st_a01.st but my st file look like: 1 I 142647 140 0.075 2 P 82493 81 0.202 3 P 24373 24 0.204 4 P 29224 29 0.204 5 P 23495 23 0.204 6 P 76393 75 0.331 7 P 22832 23 0.331 8 P 25367 25 0.336 9 P 22635 23 0.336 10 P 120039 118 0.469 11

Download the second half of a video using http's Range header

由 南笙酒味 提交于 2019-12-13 07:34:03
问题 I want to download the second half of a video I have on my local host, I wrote some python code to download the file starting from the half to the end(via http's Range header) but when I open the file with vlc, nothing happens(so it doesn't work) how can I download a part of a mp4 file and still be able to watch it? import urllib2 file_url = 'http://127.0.0.1:8080/vid.mp4' result = urllib2.urlopen(file_url) cont_len = result.headers['content-length'] req = urllib2.Request(file_url) req

Gstreamer-1.0: mux raw video in a mp4 container

由 為{幸葍}努か 提交于 2019-12-13 07:04:42
问题 I have a raw video that I can play through gstreamer: gst-launch-1.0 ... autovideoconvert ! autovideosink I can encode this video: gst-launch-1.0 ... ! autovideoconvert ! x264enc ! h264parse ! mp4mux ! filesink location=a.mp4 I would like now to put this raw video in a mp4 container "lossless", without any compression. How can I do that? 回答1: You answered in your question. Don't do compression gst-launch-1.0 ... ! autovideoconvert ! mp4mux ! filesink location=a.mp4 But you know, without

MP4Box Multiple representations causing error

由 馋奶兔 提交于 2019-12-13 05:58:40
问题 I'm trying to create a dash file with three representations using mp4box however upon creating the file I have tried to validate it and received this <svrl:failed-assert test="if (not(@duration) and not(child::dash:SegmentTimeline)) then false() else true()" location="/*[local-name()='MPD' and namespace-uri()='urn:mpeg:dash:schema:mpd:2011']/*[local-name()='Period' and namespace-uri()='urn:mpeg:dash:schema:mpd:2011']/*[local-name()='AdaptationSet' and namespace-uri()='urn:mpeg:dash:schema:mpd

iPhone encrypt and decrypt mp4 files

由 心已入冬 提交于 2019-12-13 05:42:12
问题 Can anyone suggest or provide a reference link of how to do the mp4 files encryption and decryption in iPhone/iPad ? I have tried google it but I couldn't fine any answers from it. All I want is to encrypt the mp4 files and store into the apps bundle. And decrypt it before start playing the mp4 file. Since I don't want people to use some third party tools to steal the mp4 files. Thanks so much. 回答1: It won't help prevent your mp4 from getting stolen.Since you have to play it ,then it's there

converted mp4 file using ffmpegvis not playing JW player

由 不问归期 提交于 2019-12-13 05:32:32
问题 Just i converted mov video file to mp4 file using ffmpeg. But the converted file is not playing JW player. Actual mp4 file videos working fine in all browsers. Thanks for help. 回答1: ffmpeg -i movie.mov -vcodec libx264 -acodec acc -strict experimental -profile:v baseline -f mp4 -y mp4video.mp4 回答2: My ffmpeg conversion comment is correct. But ffmpeg installation is the reason for the issue. I used the following command to convert: ffmpeg -i /uploads/sample.move -acodec libfaac -ab 96k -vcodec

Applying filter complex fails with something related to audio

由 柔情痞子 提交于 2019-12-13 04:43:35
问题 I finally managed to build ffmpeg as detailed in here: https://enoent.fr/blog/2014/06/20/compile-ffmpeg-for-android/ and in the end, I have a ffmpeg library which accepts command arguments. I am trying to apply a watermark image over the video so for it I am using preparing this ffmpeg command: ffmpeg -i input.avi -i logo.png -filter_complex 'overlay=10:main_h-overlay_h-10' output.avi I have first tried it on windows using ffmpeg.exe and the result was as expected. I have tried it on android
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