Feeds 101 – RSS… XML?!
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Feeds are a way to distribute rich content (audio/video) through websites.
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Feeds permit subscription to regular updates, delivered automatically via a web portal, news reader, or email.
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Feeds make it easier to pull content into widgets or mobile devices & offer an elegant way for blogs to display headlines and… for podcasting!
- RSS feeds are great b/c they automatically create XML instructions that allow Feed Readers (like iTunes or Feed Burner) to ‘pipe in’ content in a streamlined way
(http://www.google.com/support/feedburner/bin/answer.py?answer=79408)
Whats XML?
Extensible Markup Language = Code that gives specific instructions to browsers or mobile devices
*In your Browser (Firefox) menu, go to ‘View/Page Source’ to see the XML & HTML code of whatever page you’re on.
**WordPress is great b/c users don’t NEED to know any code to blog (usually)!
Whats an RSS?
Really Simple Syndication = a standardized web feed format used to publish frequently updated content
- news
- headlines
- ‘rich media’ (AKA audio and video
- An RSS document is called a “feed”, “web feed” or “channel”
- RSS feeds include summarized text and metadata like publishing dates and authorship
(http://en.wikipedia.org/wiki/RSS)
5 Steps to podcasting on iTunes:
1.) Create your file ~ audio, video or document (.m4a, .mp3, .mov, .mp4, .m4v, .pdf)
2.) Upload your file to a server & get its URL (i.e. ‘link to it in a blog post’)
*For now we’ll be ‘serving’ your file from your current ‘broadcastblog’ server…
3.) Create an RSS feed (an XML file) *WP does this automatically for post Categories…
4.) Submit the URL for your RSS feed to iTunes
5.) Listeners/Viewers Subscribe to your feed & enjoy your content using a Podcast client (AKA Pod-Catcher or Feed Reader) like Feedburner or iTunes…
(http://www.apple.com/itunes/podcasts/specs.html)
How to complete the aforementioned 5 steps:
*First – use Firefox!
1.) Create your file… You’re radio students… you should know how to do this:)
2-a.) Upload – Before you upload your mp3 or .mov, create a dedicated podcast Category (which in our case is intended to be specifically for audio podcasting):
- Create a ‘Podcasts’ Category (the podcasts feed you’re about to create will funnel everything you include in your Podcasts Category into the feed).
- Assign every post containing an audio link to your “podcasts” category (*every post w/ audio you want to podcast)
- If your blog is at yourname.broadcastblog.ca, your podcast feed will automatically be available at:
http://yourname.broadcastblog.ca/?feed=podcast
2-b.) Upload your file (mp3, mov etc.) to your WP media gallery (i.e. the ‘broadcastblog’ server) then ‘insert into post‘ (using whichever plugin you may have installed to customize your player options… prevent downloading etc).
2-c.) Check the new ‘Podcasts’ Category you created… and Publish your post (after filling in the requisite details, excerpt fields etc).
2-d.) TEST your podcast feed is working by typing this URL into a new browser tab:
http://evan.broadcastblog.ca/?feed=podcast
*Make sure the ‘evan’ part is your address…
**If you’re using Firefox, it should open up a Live Bookmarks page…
Example audio: Arctic Monkeys – A Certain Romance
*Audio file must be linked/embedded in your post in order for it to be available in your feed/on iTunes.
*Validate your feed: http://feedvalidator.org/
3.) Creating an RSS feed & uploading its XML file to your media server… Ta-daa! You did this in step 2 already! *WP creates your feed automatically so you don’t have to mess about with the XML files…
4.) Submit your Podcast RSS feed to iTunes
*Install iTunes on your computer if its not already there…
1.) in iTunes, go to the Advanced menu and select ‘Subscribe to Podcast‘.
- Copy/paste your podcast feed URL:
(http://mdia4015.edublogs.org/?feed=podcast). It should open in your iTunes podcasts menu.
If your mp3 file contains any id3 tags* or album art, it will display automatically in iTunes.
2.) To get your podcast into the iTunes Store…
- Open the iTunes Store in iTunes & select the Podcasts category
- In the Quick Links menu along the right side, choose Submit a podcast
- Copy/Paste your feed URL
- Open an iTunes account if you haven’t already (& enter your login info)
- Follow the directions!
*There is a plugin for that…
Podcasting with PodPress: http://www.podpress.org/
- Install the PodPress Plugin
PodPress streamlines the podcast process by putting all the iTunes required elements in one graphically-minded place (even less code monkey-ing required).
——-web-friendly-file-types——–
MP3 - the psychoacoustic masking codec*
- The MP3 format uses a ‘lossy’ compression algorithm to greatly reduce the amount of data required to represent the audio recording and still sound like a faithful reproduction of the original uncompressed audio for most listeners.
*MP3′s compress audio info by stripping out some sound info, making the file itself smaller (thus easier to stream/transmit), i.e. its a lossy format in that some info is ‘lost’ (sacrificed) in favour of file size.
**there is a trade-off between the amount of space used and the sound quality of the result… MP3′s sound OK because the mp3 compression process ‘mimics’ certain tones rather than reproducing a ‘true’ copy of each note… our ears can’t tell the difference.
i.e. fewer similar-but-different notes = less unique info = smaller file size
- An MP3 file that is created using the setting of 128 kbit/s will result in a file that is about 11 times smaller than the CD file created from the original audio source.
(http://en.wikipedia.org/wiki/Mp3)
Bit rate – 128, 160 and 192 kbps are typical MP3 bit rates – 128kbps is a good middle-ground b/t quality & filesize
- The higher the bit rate, the larger the file (and the closer it will sound to the original file).
- Too low a bit rate and your file will sound artifacted & jumpy
*Uncompressed audio (like a store-bought album on CD) has a bit rate of 1,411.2 kbps
Sample rate – CD quality = 44.1kHz 16-bit stereo, broadcast/HD/DVD pro quality = 48kHz 32-bit stero (keeps up with 29.9fps video)
(http://en.wikipedia.org/wiki/Sampling_rate)
WAV – Waveform Audio File Format (aka Windows Audio)
- Typically used to store uncompressed audio (CD quality)BIG FILES
- Not great for online sharing!
- Use when broadcast quality audio is needed!
- WAV files must be less the 4GBs… (about 7 hours of CD quality audio – 44.1kHz 16-bit)
MOV – Quicktime File Format (aka Apple video)
- Multimedia ‘container’ format that ‘wraps’ MPEG audio w/ video for easy transfer & playback (like MP4)
- universal standard format – plays on most devices & browsers