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bit rate too much,The screen effect is not obvious. While MKV is H.264 encoded and used for HD videos. The 1080p image rate reaches 30 Mbps.Of course, the formula for calculating files not compressed is different:Sound:, data volume (bit/second) = (sampling frequency (HZ) * sampling bit (BIT) * number of channels)The number of single-channel channels is 1, and the number of stereo channels is 2.Data size * time/8 = total
During file upload, in order to achieve the asynchronous upload effect, iframe is usually used for file upload, but we cannot process the data returned by the server like ajax, so as to determine the file size and file style, we generally think of using js to make a prelimin
During file upload, in order to achieve the asynchronous upload effect, iframe is usually used for file upload, but we cannot process the data returned by the server like ajax, so as to determine the file size and file style, we generally think that when we upload files, in
We do file upload, in order to achieve the effect of asynchronous uploads, will generally choose to use the form of IFrame to upload files, but we can not like Ajax to the server-side returned data processing, so as to file size and file style judgments, So we generally think of using JS to upload the
input text dynamic text less use uncommon font. Especially Chinese characters, because the number and English words, only need to embed 26 letters and 10 digits on it. 4, the music chooses the WAV format, this is much bigger than the MP3 format. 5, the same element of things as far as possible to convert to components, re-use can not increase the size of the file
input text dynamic text less use uncommon font. Especially Chinese characters, because the number and English words, only need to embed 26 letters and 10 digits on it. 4, the music chooses the WAV format, this is much bigger than the MP3 format. 5, the same element of things as far as possible to convert to components, re-use can not increase the size of the file
, heatace, vspace .... some common attributes will not be listed. Here we will talk about the "DYNSRC" attribute: DYNSRC can be used to insert various multimedia, the format can be WAV, Avi, AIFF, AU, MP3, Ra, ram, and so on. The URL is an audio or video file and its path, which can be a relative or absolute path. Example: In this way, the path of any type of file
For Web developers, file uploading is common and it is essential to determine the file size. Here we mainly introduce several common methods for JavaScript to determine the file size. The first method is to apply ActiveX controls, for example: JavaScript Code
For Web developers, file uploading is common and it is essential to determine the file size. Here we mainly introduce several common methods for JavaScript to determine the file size. The first method is to apply ActiveX controls, for example:JavaScript code Thi
. Of course, change the file name. HTA will block the security prompt, but it is difficult to obtain it.Not recommended, not to mention Next, let's talk about another method. There is an IMG tag in the HTML Tag that is not "deep" for general developers. let's first talk about its attributes: SRC, DYNSRC, start, ALT, controls, loop, loopdelay, hspace, vspace .... some commonly used attributes will not be listed. Here we will talk about the "DYNSRC"
JST to determine file size code, do not want to use ActiveX control friends to pay attention to. The first is to apply an implementation of an ActiveX control, such as: JavaScript code This approach can be implemented and easily thought of by developers, but the only disadvantage is that there is a security hint, and of course the file name is chang
The HTML Tag contains an IMG tag that is not generally known to developers. Let's talk about its attributes first: SRC, DYNSRC, start, ALT, controls, loop, loopdelay, heatace, vspace. ... Some common attributes will not be listed, Here we will talk about the "DYNSRC" attribute: DYNSRC can be used to insert various multimedia files in the format of Wav, Avi, AIFF, AU, MP3, Ra, Ram, etc. . The URL is an audio or video
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