mp4 | 易学教程

Convert swf to mp4

阅读更多关于 Convert swf to mp4

问题 This answer had not helped: Convert compressed swf to mp4, trying to convert swf file. ffmpeg output: $ ffmpeg -i GTDS_demo_new.swf GTDS_demo_new.mp4 ffmpeg version 2.8.6-1ubuntu2 Copyright (c) 2000-2016 the FFmpeg developers built with gcc 5.3.1 (Ubuntu 5.3.1-11ubuntu1) 20160311 configuration: --prefix=/usr --extra-version=1ubuntu2 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable

Which format support the audio file with a playing video?

阅读更多关于 Which format support the audio file with a playing video?

问题 i am playing the video and in the background i have to play the audio file and if i do this audio is not playing its sound as it just play video is it a extension problem i am using the .mp3 for the audio and .mp4 for the video . how can we do this we have to play simultanisouly .both the file balraj verma 回答1: Have a look at this: http://developer.apple.com/iphone/library/documentation/MusicAudio/Conceptual/CoreAudioOverview/CoreAudioEssentials/CoreAudioEssentials.html#//apple_ref/doc/uid

视频mp4与m4v格式区别

阅读更多关于视频mp4与m4v格式区别

一、M4V格式 M4V 是一个标准视频文件格式，由苹果公司创造。此种格式为 iPod 、 iPhone 和 PlayStation Portable 所使用，同时此格式基于 MPEG-4 编码第二版。其视频编码采用H264或H264/AVC，音频编码采用AAC。采用H264高清编码，相比于传统On2 VP6、H263、Divx等，能够以更小的体积实现更高的清晰度。 M4V格式也称作苹果的视频Podcast 格式。是MP4的特殊类型，M4V是MP4格式高清的代表应用二、MP4格式 MP4是一套用于音频、视频信息的压缩编码标准，由国际标准化组织（ISO）和国际电工委员会（IEC）下属的“动态图像专家组”（Moving Picture Experts Group，即MPEG）制定，第一版在1998年10月通过，第二版在1999年12月通过。MPEG-4格式的主要用途在于网上流、光盘、语音发送（视频电话），以及电视广播三、识别视频具体格式这里使用phpsh进行编码查看 >>> $f = new finfo => finfo {#2339} >>> $f->file('/tmp/5s_video.mp4', FILEINFO_MIME_TYPE); => "video/mp4" >>> $f->file('/tmp/杀手篇.mp4', FILEINFO_MIME_TYPE); =>

数据分析实务

阅读更多关于数据分析实务

01内部运营策略分析——数据分析课.mp4 02Tableau.mp4 03内部运营直播.mp4 04python初级-基础.mp4 05Python初级-if语句.mp4 06Python初级-常量-变量-运算符.mp4 07Python初级-while循环.mp4 08python初级-函数_字符串.mp4 09python初级-字符串常用函数.mp4 10python初级—列表.mp4 11python初级—元组_字典.mp4 12python初级—函数补充_lambda.mp4 13Python初级—内置函数_模块引入.mp4 14Python数据分析—numpy（1）.mp4 15Python数据分析—numpy（2）.mp4 16Python数据分析—pandas.mp4 17Python数据分析—pandas_chipotle数据集.mp4 18Python数据分析—二手房交易_matplotlib.mp4 19Python数据分析—线图_柱图.mp4 20赠一window操作.mp4 21Webscraper.mp4 22行业研究.mp4 23SQL&R直播课.mp4 24竞争分析.mp4 25竞争分析直播.mp4 26R语言-1.mp4 27R语言-2.mp4 28R语言-3.mp4 29R语言-4.mp4 30excel.mp4 31Excel直播课作业讲解

ffmpeg 2 audio files in one video file

阅读更多关于 ffmpeg 2 audio files in one video file

问题 lets say I have a video file (video.mp4) and 2 audio files (audio1.mp3 and audio2.mp3.) The video has a length of 60 seconds, every audio file has a length of 30 seconds. What I am trying to achive is: the first 20 seconds of the video is with original audio stream, followed by 20 seconds of the first audio file (offset of 5 seconds with a length of 20s) and the same with the second audio file. ffmpeg -i video.mp4 -ss 5 -t 20 -i audio1.mp3 -ss 5 -t 20 -i audio2.mp3 -vcodec copy -acodec copy

Exoplayer Video Quality options for an mp4 video

阅读更多关于 Exoplayer Video Quality options for an mp4 video

问题 I used Exoplayer to play an HLS video track and following code works fine to fetch the different possible video qualities and to show them as options for the user to select from multiple resolutions. for (int i = 0; i < player.getTrackCount(0); i++) { MediaFormat format = player.getTrackFormat(0, i); if (MimeTypes.isVideo(format.mimeType)) { if (format.adaptive) { menu.add(1, (i + 1), (i + 1), "Auto"); } else { menu.add(1, (i + 1), (i + 1), format.width + "p"); } } } Now i use the same code

Merge MDAT atoms of MP4 files

阅读更多关于 Merge MDAT atoms of MP4 files

问题 I have a series of MP4 files (H.264 video, AAC audio, 16KHz). I need to merge them together programmatically (Objective-C, iOS) but the final file will be too large to hold in memory so I can't use the AVFramework to do this for me. I have written code which will do the merge and takes care of all of the MP4 atoms (STBL, STSZ, STCO etc.) based on just concatenating the contents of the respective MDATS. The problem I have is that while the resultant file plays, the audio gradually gets out of

NdkMediaCodec: couldn't get output / input buffers

阅读更多关于 NdkMediaCodec: couldn't get output / input buffers

问题 I am using native codec to read .mp4 file... My application flow: I have 2 buttons when I click on first button I am starting to read one .mp4 file, when I click second button I am starting to read another .mp4 file So, problems came when I am clicking on the buttons 1 and 2 in one second delay between them in order to check app behaviour when I am switching the video from one to another... And sometimes I get crash with such log / E/NdkMediaCodec: sf error code: -38 / E/NdkMediaCodec: sf

Failed to convert .avi to .mp4 in iOS objective-c

阅读更多关于 Failed to convert .avi to .mp4 in iOS objective-c

问题 I am using a camera to record video's and save them into my documents folder. The problem I am facing is that the video's I got from the camera are .avi files and have to be converted to .mp4 (or any other allowed format). I use the code below: SOURCE: iOS Convert AVI to MP4 Format programatically NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString *filePath = [documentsDirectory

flvEncoder .flv output won't convert to .mp4 with ffmpeg [duplicate]

阅读更多关于 flvEncoder .flv output won't convert to .mp4 with ffmpeg [duplicate]

问题 This question already has an answer here : FFmpeg converting image sequence to video results in blank video [closed] (1 answer) Closed 2 years ago . My current project involves creating a .flv using AIR (using https://github.com/zeropointnine/leelib/tree/master/src/leelib/util/flvEncoder) - which then has to be converted into an .mp4, for which we are using ffmpeg. The .mp4 output is the correct dimensions and duration, but blank (no images). Audio is not an issue as the original output has