Using NSURLProtocol to implement play while downloading for AVPlayer on iOS -


i'm trying play mp4 video on server , i'd cache video disk simultaneously.

i know can use 2 requests this, 1 download 1 created avplayer play video, waste network bandwidth.

so need use 1 outer request download data , capture nsurlrequest avplayer in mynsurlprotocol , manually create nshttpurlresponse them.

this how workflow looks like:

avplayer <-->  mynsurlprotocol <--> mp4 on network.

by using charles can see avplayer takes 2 steps play video on internet. 1st step download first 2 bytes in order know whole video file size. following requests download different parts of file concurrently.

so mynsurlprotocol downloading whole mp4 file outer request , when there's enough data, create responses sent avplayer (also data).

this how creates , sends response.. 2-bytes request.

nsmutabledictionary* headers = ... // config headers this:  {     "accept-ranges" = bytes;     "cache-control" = public;     "content-length" = 2;     "content-range" = "bytes 0-1/6581417";     "content-type" = "video/3gpp";     date = "thu, 18 apr 2013 08:34:35 gmt";     expires = "wed, 12 feb 2014 08:34:35 gmt";     "last-modified" = "tue, 16 apr 2013 09:03:35 gmt";     "connection" = close;     server = "gvs 1.0";     "x-content-type-options" = nosniff; }   nshttpurlresponse* response = [[nshttpurlresponse alloc] initwithurl: self.request.url statuscode:206 httpversion:@"http/1.1" headerfields:headers];  [self.client urlprotocol:self didreceiveresponse:response  cachestoragepolicy:nsurlcachestorageallowed];

the problem avplayer doesn't send following requests fetch actual data, hm... clue?

ok, found this: how play movie url using custom nsurlprotocol?

it seems custom nsurlprotocol can not work avplayer. give up.


Comments

Post a Comment

Popular posts from this blog

Why does Ruby on Rails generate add a blank line to the end of a file? -

running rails generate controller foo home results in: class foocontroller < application controller def home end end (there's nothing on line in actual file, blank line) is there purpose blank line? it's common use newline indicate end of line, last line. many editors (like vi, use) add in newline silently. consensus text files (especially in unix world) should end in newline, , there have been problems historically if wasn't present. why should text files end newline? the tool used count lines in file "wc" counts newlines in file, without trailing newline show 3 instead of 4. it improves readability of templates used in generator. consider: https://github.com/rails/rails/blob/master/railties/lib/rails/generators/rails/controller/templates/controller.rb to remove trailing newline, template have last line of: end<% end -%> instead of: end <% end -%> that seems less readable me. the discussion below refers ...
Read more

node.js - Bad Request - node js ajax post -

i'm using express 3.0 , node v0.11.0. have button submits form , i'm using ajax post data json object node server. client code is: $('#contact').submit(function(e) { console.log('submit called'); var formdata = json.stringify($('form').serializeobject()); console.log(formdata); $.ajax({ url: "http://localhost:3000/savedata/", type: "post", datatype: 'json', data: {objectdata: formdata}, contenttype: "application/json", complete: function() { console.log('process complete'); }, success: function(data) { console.log('process sucess'); }, error: function() { console.log('process error'); }, }); return false; }); then on server: var express = require('express'); var app = express(); app.set('views', __dirname + '/views'); app.set('view engine', 'jade'); app.use(express.bodyparser());...
Read more

keyboard - Smiles and long press feature in Android -

i've created android keyboard. how add features inserting smilies, , using long keypresses display symbols? to create long-press behavior allows select several options pop-up menu, follow guide (specifically pop-up menu section): http://developer.android.com/guide/topics/ui/menus.html smileys (also known emoticons) combination of keys, understood programs , parsed same way. have do, when clicks smiley face on keyboard, simulate pressing of key combination matching emoticon. example, when clicks smiley, should simulate key presses ':' , ')' :). here's list of emoticons: http://en.wikipedia.org/wiki/list_of_emoticons
Read more