我在coldfusion中有一个web应用程序，可以录制视频并向用户提供视频。
视频在Android和桌面浏览器上工作正常，但它给了我错误＆＃34;加载媒体时出错：文件无法播放＆＃34;在内部监督办公室。
这是我目前正在使用的JWPlayer代码。
jwplayer("element").setup({
file: "/video.cfm?token=4514_129_9B2F727D-5056-A85D-6EBE3E48FC2AB9C6",
image: "path/to/image",
width: 450,
height: 360,
type: "mp4",
logo: {
file: 'path/to/logo',
link: 'example.com',
hide : true
}
});
验证后，这是我的video.cfm到服务器mp4。
<cfset videoFile = 'path\to\file'>
<cfset fileInfo = GetFileInfo(videoFile)>
<cfset length = fileInfo.size>
<cfset start = 0>
<cfset end = fileInfo.size - 1>
<cfheader name="Content-type" value="video/mp4">
<cfheader name="Accept-Ranges" value="0-#length#">
<cfheader name="Content-Range" value="bytes #start#-#end#/#fileInfo.size#">
<cfheader name="Content-Length" value="#length#">
<cfcontent file="#videoFile#" type="video/mp4">
我通过添加一些标题尝试了一些解决方案。但这并不奏效。任何人都可以帮我解决问题。
答案 0 :(得分：2)
我能够解决我的问题。 iOS使用部分内容标题来运行视频。感谢rickward提出的这个可爱的解决方案：Media Delivery to iPhones and iPads。我做了一些小改动，它开始为我工作。
这是最终的video.cfm文件。
<cfset videoPath = 'path\to\mp4\file'>
<cfif FileExists(videoPath)>
<cfset fileInfoVar = GetFileInfo(videoPath)>
<cfheader name="Last-Modified" value="#fileInfoVar.Lastmodified#">
<cfheader name="ETag" value="#hash(videoPath, 'MD5')#">
<cfheader name="Content-Location" value="http://example.com/video.cfm">
<cfif structKeyExists(GetHttpRequestData().headers, 'Range')>
<cfset rangeDownload(videoPath)>
<cfelse>
<cffile action="readbinary" file="#videoPath#" variable="theData">
<cfscript>
context = getPageContext();
context.setFlushOutput(false);
response = context.getResponse().getResponse();
response.setContentType("video/mp4");
response.setContentLength(arrayLen(theData));
out = response.getOutputStream();
out.write(theData);
out.flush();
out.close();
</cfscript>
</cfif>
</cfif>
<cffunction name="rangeDownload" returnType="void" output="yes">
<cfargument name="file" type="string" required="true" hint="path to file">
<cfset var l = {}>
<cfset l.request = GetHttpRequestData()>
<cffile action="readbinary" file="#ARGUMENTS.file#" variable="l.theData">
<cfset l.size = arrayLen(l.theData)>
<cfset l.length = l.size>
<cfset l.start = 0>
<cfset l.end = l.size - 1>
<!--- Now that we've gotten so far without errors we send the accept range header
/* At the moment we only support single ranges.
* Multiple ranges requires some more work to ensure it works correctly
* and comply with the spesifications: http://www.w3.org/Protocols/rfc2616/rfc2616-sec19.html#sec19.2
*
* Multirange support annouces itself with:
* header('Accept-Ranges: bytes');
*
* Multirange content must be sent with multipart/byteranges mediatype,
* (mediatype = mimetype)
* as well as a boundry header to indicate the various chunks of data.
*/
--->
<cfheader name="Accept-Ranges" value="0-#l.length#">
<!---<cfheader name="Accept-Ranges" value="bytes"> --->
<!---
multipart/byteranges
http://www.w3.org/Protocols/rfc2616/rfc2616-sec19.html#sec19.2 --->
<cfif structKeyExists(l.request.headers, 'Range')>
<cfset l.c_start = l.start>
<cfset l.c_end = l.end>
<!--- Extract the range string --->
<cfset l.range = ListGetAt(l.request.headers.range, 2, '=')>
<!--- Make sure the client hasn't sent us a multibyte range --->
<cflog file="rangeDownload" text="#l.range#" />
<cfif l.range contains ','>
<!--- (?) Should this be issued here, or should the first
range be used? Or should the header be ignored and
we output the whole content?
--->
<cfheader statusCode = "416" statusText = "Requested Range Not Satisfiable">
<cfheader name="Content-Range" value="bytes #l.start#-#l.end#/#l.size#">
<!--- (?) Echo some info to the client? --->
<cfabort>
</cfif>
<!--- If the range starts with an '-' we start from the beginning
If not, we forward the file pointer
And make sure to get the end byte if specified --->
<cfif Left(l.range, 1) eq '-'>
<!--- The n-number of the last bytes is requested --->
<cfset l.c_start = l.size - Mid(l.range, 2, Len(l.range))>
<cfelse>
<cfset l.rangeArray = ListToArray(l.range, '-')>
<cfset l.c_start = l.rangeArray[1]>
<cfif ArrayLen(l.rangeArray) eq 2 and val(l.rangeArray[2]) gt 0>
<cfset l.c_end = l.rangeArray[2]>
<cfelse>
<cfset l.c_end = l.size>
</cfif>
</cfif>
<!---
/* Check the range and make sure it's treated according to the specs.
* http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html
*/
// End bytes can not be larger than l.end. --->
<cfif l.c_end gt l.end>
<cfset l.c_end = l.end>
</cfif>
<!--- Validate the requested range and return an error if it's not correct. --->
<cfif l.c_start gt l.c_end || l.c_start gt (l.size - 1) || l.c_end gte l.size>
<cfheader statusCode = "416" statusText = "Requested Range Not Satisfiable">
<cfheader name="Content-Range" value="bytes #l.start#-#l.end#/#l.size#">
<!--- (?) Echo some info to the client? --->
<cfabort>
</cfif>
<cfset l.start = l.c_start>
<cfset l.end = l.c_end>
<cfset l.length = l.end - l.start + 1><!--- Calculate new content length --->
<cfscript>
context = getPageContext();
context.setFlushOutput(false);
response = context.getResponse().getResponse();
response.setContentType("video/mp4");
response.setContentLength(l.length);
</cfscript>
<cfheader statusCode = "206" statusText = "Partial Content">
</cfif>
<!--- Notify the client the byte range we'll be outputting --->
<cfheader name="Content-Range" value="bytes #l.start#-#l.end#/#l.size#">
<cfheader name="Content-Length" value="#l.length#">
<cfscript>
// Start buffered download
out = response.getOutputStream();
// write the portion requested
out.write(l.theData, javacast('int', l.start), javacast('int', l.length));
out.flush();
out.close();
</cfscript>
</cffunction>