Prototyping 2013-11-05 (Lens Based Media): Difference between revisions
No edit summary |
No edit summary |
||
Line 7: | Line 7: | ||
Format: | Format: | ||
* determines the way audio and video (and other metadata) are stored inside the file | * determines the way audio and video (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: | Codec: | ||
* | * Intraframe compression | ||
* | ** Compresses each frame (with for instance JPG compression) | ||
** No effective size compression | |||
** High Quality | |||
** Easily readable by edit software | |||
** Apple ProRes, DNxHD (Avid) | |||
* Interframe Compression [http://www.popmodernism.org/appropirate/delta.html| 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 | |||
=== Lossy vs. Lossless === | |||
== Tools == | == Tools == |
Revision as of 16:19, 4 November 2013
Compression & Codecs in video
Codec != Format
(File)Format or Container is the shipping box, codec is the goods inside the box.
Format:
- determines the way audio and video (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:
- Intraframe compression
- Compresses each frame (with for instance JPG compression)
- 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
Lossy vs. Lossless
Tools
- ffmpeg (ffmpegX for a Mac gui version)
- Mencoder
- Mpegstreamclip
- Handbrake
- Adobe Media Encoder
Delivery
Glitch Art
Data moshing
{{#ev:youtube|mvqakws0CeU?version=3&autohide=1&showinfo=0}}