Prototyping 2013-11-05 (Lens Based Media): Difference between revisions
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== Codec == | == Codec == | ||
Why do we compress? | |||
* Image- and videofile sizes reduced | |||
* More files to store, or longer videos | |||
* Faster to download | |||
* Downside: someone has to decode! | |||
[[File:jpegcompression.jpg|thumb|right|400px|jpeg compression]] | |||
Types of compression | |||
* '''Intraframe''' compression | * '''Intraframe''' compression | ||
** Compresses each frame (with for instance JPG | ** Compresses each frame (so similar to image compression, with for instance JPG) | ||
** No effective size compression | ** No effective size compression | ||
** High Quality | ** High Quality | ||
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[http://www.youtube.com/watch?v=ShG1mnHKntg&t=2m2s] | [http://www.youtube.com/watch?v=ShG1mnHKntg&t=2m2s] | ||
== Tools == | == Encoding Tools == | ||
* [http://www.ffmpeg.org/download.html| ffmpeg (ffmpegX for a Mac gui version)] | * [http://www.ffmpeg.org/download.html| ffmpeg (ffmpegX for a Mac gui version)] | ||
* [http://en.wikipedia.org/wiki/MEncoder| Mencoder] | * [http://en.wikipedia.org/wiki/MEncoder| Mencoder] | ||
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* Adobe Media Encoder | * Adobe Media Encoder | ||
== Bitrate + Framesize == | |||
== Workflow, Archiving & Delivery == | |||
There's no solution to the question 'What is the best setting for my video?". All depends on the platform you will deliver to! | |||
* How do you record? | |||
* How do you edit? | |||
* What do you deliver? | |||
* [http://mashable.com/2010/06/03/youtube-i-am-sitting/| what happens when you upload to youtube?] | * [http://mashable.com/2010/06/03/youtube-i-am-sitting/| what happens when you upload to youtube?] | ||
== Glitch Art | == Glitch Art & Data moshing == | ||
[[File:downloadfinished.jpg|right|thumb|400px|Download Finished]] | [[File:downloadfinished.jpg|right|thumb|400px|Download Finished]] | ||
* [http://www.youtube.com/watch?v=tYytVzbPky8| How to datamosh] | * [http://www.youtube.com/watch?v=tYytVzbPky8| How to datamosh] | ||
Revision as of 21:55, 4 November 2013
Compression & Codecs in video
(File)Format or Container is the shipping box, codec is the goods inside the box.
Format
- determines the way audio and video streams (and other metadata) are stored inside the file
- Examples are :
- .avi (Microsoft -> OLD)
- .wmf (Microsoft -> Unflexible)
- .mov (Apple -> supports a lot of codecs)
- .ogg (Open Source -> but not very well supported by editing software)
- .mkv (Open Source -> but not very well supported by editing software)
- .mp4 (works on virtually all platforms)
Codec
Why do we compress?
- Image- and videofile sizes reduced
- More files to store, or longer videos
- Faster to download
- Downside: someone has to decode!
File:Jpegcompression.jpg
jpeg compression
Types of compression
- Intraframe compression
- Compresses each frame (so similar to image compression, with for instance JPG)
- No effective size compression
- High Quality
- Easily readable by edit software
- Apple ProRes, DNxHD (Avid)
- Interframe Compression Looking at delta Frames
- Compress BETWEEN frames
- effective size compression
- Not easy for edit software
- Use for sharing -> final output
- MPEG-2 (DVD's, hardware players), DivX (downloads), H264 (currently has best quality vs. file ratio)
FYI: Uncompressed HD video = 400GB per hour
More Info
[1]
Encoding Tools
- ffmpeg (ffmpegX for a Mac gui version)
- Mencoder
- Handbrake
- Mpegstreamclip
- Adobe Media Encoder
Bitrate + Framesize
Workflow, Archiving & Delivery
There's no solution to the question 'What is the best setting for my video?". All depends on the platform you will deliver to!
- How do you record?
- How do you edit?
- What do you deliver?
Glitch Art & Data moshing
{{#ev:youtube|mvqakws0CeU?version=3&autohide=1&showinfo=0}}