From New Media Wiki
Media College - a free educational and resource website for all forms of electronic media
Contents |
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Where to store . . .
Video:
Audio:
Pictures (Images):
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Video editing
iMovie on the Mac, Windows Movie Maker for PC.
VideoSpin is a new simple basic editor for PC. Save Flash video or upload directly to YouTube
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Video Compression
Facts -
- 1 hour of digital video (from DV camera) = ~12GB of data (even that is compressed!).
- DVDs 1 hour = ~2GB - It uses MPEG2 compression.
- MPEG4/DivX/etc. 1 hour = less than 1GB.
- Flash Video 1hour = less than 1GB (easily displayed on the web).
- "Bit Rate" determines quality and file size.
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Image and Audio Compression
- Images use JPEG compression (files that end with .jpg). Tiff (.tif), Bitmap (.bmp), Photoshop (.psd) are uncompressed (i.e. larger file sizes).
- Audio files use MP3 compression (files that end with .mp3). Wave (.wav), and AIFF (.aif) or Audio Interchange File Format are uncompressed.
- Wave audio files 1 hour = ~600MB. 1 hour MP3 = 60MB
- Again, "Bit Rate" determines quality and file size.
- iTunes uses a format called AAC (Advanced Audio Coding). By default they have a bitrate of 128kbps. MP4?
- Lower bitrates 64kbps, 56kbps, 40kbps, 32kbps, means more compression, lower (worse) quality, and smaller files.
- Higher bitrates 160kbps, 192kbps, 256kbps, 320kbps, means less compression, better quality, and bigger files.