mp4 | 易学教程

MP4 not supported in Firefox?

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问题 If I paste the following URL directly into the address bar in Firefox, the video plays just fine: http://distilleryvesper1-13.ak.instagram.com/744b42900fab11e3a34522000ae80008_101.mp4 However, as soon as I wrap it in HTML5 video tags (as in this Fiddle), Firefox claims that the video isn't supported: <video width="612" height="612" controls> <source src="http://distilleryvesper1-13.ak.instagram.com/744b42900fab11e3a34522000ae80008_101.mp4" type="video/mp4"> </video> I'm using Firefox version

Mediacodec jelly-bean

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I'm working with media codec for an .mp4 file on jelly-bean and getting this in logcat 02-27 12:12:13.645: A/ACodec(6760): frameworks/av/media/libstagefright/ACodec.cpp:1041 CHECK(def.nBufferSize >= size) failed. 02-27 12:12:13.645: A/libc(6760): Fatal signal 11 (SIGSEGV) at 0xdeadbaad (code=1), thread 6778 (CodecLooper) Can anyone tell me what is this? and how to solve it? You provided not much info, so the answer follows: Looks like it is internal check of libstagefright library. I faced same error on Samsung Tab 2 on decoder's configuration. mDecoder = MediaCodec.createDecoderByType(mime);

Camera2 video recording without preview on Android: mp4 output file not fully playable

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问题 I am trying to record video from the back camera (the one that faces the face) on my Samsung Galaxy S6 (which supports 1920x1080 at about 30 fps). I do not want to have to use any surface for previewing if I do not have to as this is to just happen in the background. I seem to have it working, but the output files are not playable in a way that actually is correct. On my Windows 10 PC, Windows Media Player will show the first frame and then play the audio, VLC will not show any of the frames.

HTML5 lagging videos MP4

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I have a problem, When i upload a video to my website And play the video in my HTML5 player(video.js) They are lagging, But it's weird because not all mp4 files are lagging on the site only some videos, But when i download them from my server and play them on my computer it's playing normal. Why are some video's lagging? Does someone have a explanation for it? If the problem is bandwidth, then depending on format, source bit rate, framesize etc you'll want to re-encode to a more optimal size for your intended purpose ffmpeg -i "my.mp4" -f mp4 -vcodec mpeg4 -b 512k -r 30 -s 640x360 -acodec

Upload any video and convert to .mp4 online in .net

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问题 I have a strange requirement. User can upload their video of any format (or a limited format). We have to store them and convert them to .mp4 format so we can play that in our site. Same requirement also for audio files. I have googled but I can't get any proper idea. Any help or suggestions....?? Thanks in advance 回答1: You can convert almost any video/audio user files to mp4/mp3 with FFMpeg command line utility. From .NET it can be called using wrapper library like Video Converter for .NET

Concatenate multiple mp4 audio files using android´s MediaMuxer

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I am trying to concatenate multiple mp4 audio files (each containing only one audio track, all recorded with the same MediaRecorder and the same parameters) into one using the following function: @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR2) public static boolean concatenateFiles(File dst, File... sources) { if ((sources == null) || (sources.length == 0)) { return false; } boolean result; MediaExtractor extractor = null; MediaMuxer muxer = null; try { // Set up MediaMuxer for the destination. muxer = new MediaMuxer(dst.getPath(), MediaMuxer.OutputFormat.MUXER_OUTPUT_MPEG_4); // Copy the

python科学计算与可视化视频教程

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目录：下载链接： https://www.yinxiangit.com/616.html 第一单元TVTK入门-1.mp4 第一单元TVTK入门-2.mp4 第一单元TVTK入门-3.mp4 第一单元TVTK入门-4.mp4 第七单元Mayavi可视化实例-1.mp4 第七单元Mayavi可视化实例-2.mp4 第七单元Mayavi可视化实例-3.mp4 第三单元TVTK库可视化实例-1.mp4 第三单元TVTK库可视化实例-2.mp4 第三单元TVTK库可视化实例-3.mp4 第九单元Traits基础-1.mp4 第九单元Traits基础-2.mp4 第九单元Traits基础-3.mp4 第九单元Traits基础-4.mp4 第九单元Traits基础-5.mp4 第二单元TVTK管线与数据加载-1.mp4 第二单元TVTK管线与数据加载-2.mp4 第二单元TVTK管线与数据加载-3.mp4 第二单元TVTK管线与数据加载-4.mp4 第五单元Mayavi入门-1.mp45 第五单元Mayavi入门-2.mp4 第五单元Mayavi入门-3.mp4 第六单元Mlab基础-1.mp4 第六单元Mlab基础-3.mp46 第六单元Mlab基础-4.mp4 第六单元Mlab基础-5.mp43 第六单元Mlab基础-6.mp4 第六单元Mlab基础-7.mp4

MP4 unsupported in JavaFX?

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So I've recently started working with JavaFX to try and insert video and audio into my java programs. Audio has worked just fine, but for some reason every time I try and play a video file, it returns a MEDIA_UNSUPPORTED exception. I've read around and saw that the video file needed to be MP4 (which it is), so I tried converting it to a different type then re-converting it to MP4 (H.264 & AAC) with a few different converters and nothing changes. Here's the code I'm working with: import java.net.URL; import javax.swing.JFrame; import javax.swing.SwingUtilities; import javafx.application

Play mp4 file through php in HTML5 Video Tag in Chrome?

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I have a problem with mp4 files. Html5 Video Tag can play it with direct link, but not with PHP Header (Mp3 is worked fine with PHP Header). I have tried almost of solution in Stack but still not resolve my problem :( Hear is my code: PHP mp4.php error_reporting(0); $local_file = 'z.mp4';//'b.mp3'; $download_file = 'out.mp4'; // send headers header('Cache-control: private'); header('Content-Type: video/mp4'); header('Content-Length: '.filesize($local_file)); header('Content-Disposition: filename='.$download_file); header('Accept-Ranges: bytes'); header("Content-Transfer-Encoding: binary");

Mediaelement.js malfunction in IE, no flashback works

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I used the mediaelement.js in my site, I used for the example a .mp4 file with H.264 codec, works well in all browsers, but it doesn't works in any version of Internet Explorer when I publish the site. On my localhost, it doesn't have any problems (the flash fallback works well), but in my server it doesn't works. The code I used is: <!DOCTYPE HTML> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>VIDEO HTML5</title> <script type="text/javascript" src="player_files/jquery.js"></script> <script type="text/javascript" src="player_files/mediaelement-and