Codec Tests
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New Tests: MPEG4 Part 2 Simple Profile (Fall 06)-Non-scientific!
Source Material from 3 chip camera, DV format
Encoded on Mac G5 Dual 2GHz PowerPC, 1 GM RAM, using Cleaner 6.5.1.177, OSX 10.4.8., QuickTime Pro 7.1.3
Same pre-processing on all clips. Video encoded to 340 kbps, 15 fps, keyframe every 150 frames with automatic keyframes, one-pass VBR when possible. (Normally I put in a key frame every 5-6 seconds, but messed up on the first movie, so I kept the same settings for the rest)
Audio compressed to AAC, 40 kbps, mono, 32KHz.
The best way to compare codecs, after playing a clip, is to stop the movies at the same location when compression is difficult: lots of motion, color, a dissolve, etc. This is when compression artifacts are most noticeable.
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Codec used
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Click video below
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Notes
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| 3ivx (V 4.5.1) |
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encoding time: 4 min 16 sec
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| Sorenson Video 3 Pro (v 3.3) |
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encoding time: 5 min 38 sec
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| Apple MPEG4 (Spatial Q 50) |
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encoding time: 4 min 16 sec
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| Apple MPEG4 (Spatial Q 100) |
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encoding time: ?
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| Apple MPEG4 Improved |
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encoding time: 4 min 23 sec |
ORIGINAL DV FILE: To download on Mac, Control-click and select "Download Linked File".
On PC, right click and select "Save Target As". HERE (this is a 33 sec clip, 120 MB)
Preprocessing used:
Image: Slight crop, Image size 352x264, Deinterlace Eliminate Top Field Adaptive, Sharpen 1.5/25
Adjust: Gamma +24, Brightness +24, Saturation -4
Encode: 15 fps, Video Rate Basic, Limit to 340 kbits/sec.
Options for 3ivx-Default for Single Pass-Average Bitrate, but set Minimum Quality to 18 (probably why the data rate is a bit higher than 340 kbps), and Force Keyframe after 150 delta frames). Usually I use the default, but keyframe every 5-6 sec.
Options for Sorenson: Bidirectional Prediction Allow, Automatic Key Frames 50, Sorenson One-Pass VBR, nothing else selected.
Options for MPEG-4 Improved: Keyframe Every 150 frames, Re-sync markers. You can't create a QT movie in Cleaner using MPEG-4 Improved. An mp4 file was created, and then saved as a mov.
Audio: Codec: MPEG-4, Sample rate 32 KHz, 16 bit, Mono, Bit Rate 40 kbps, Output sample rate 32 KHz., Encoder Quality Best
Old Tests (Fall 04)
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Click video below
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Notes
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| Rob Dialog (true streaming) |
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3ivx, 320x240, 15 fps
617,554 bytes, 26 seconds 190 kbps |
| Test Sequence (true streaming) |
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3ivx, 320x240, 15 fps
823,893 bytes, 37 seconds 178 kbps |
| Test Sequence (http fast-start) |
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Same movie as above
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| Orlean-15-180k (true streaming MPEG4 packetizer) |
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3ivx, 320x240, 15 fps, 144 kbps, keyframes @ 10 sec.
File size 95,035,315 bytes, 4232 seconds Total data rate 179 kbps, Audio and video in sync. |
| Orlean-15-180k (http fast-start) |
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Same movie as above
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| Orlean-30-250k (true streaming QuickTime packetizer) |
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3ivx, 320x240, 29.97 fps, 203 kbps, keyframes @ 5 sec.
File size 135,777,811 bytes, 4232 seconds Total data rate 257 kbps, Audio and video in sync. |
| Orlean-30-250k (true streaming MPEG4 packetizer 1450-byte packets) |
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3ivx, 320x240, 29.97 fps, 203 kbps, keyframes @ 5 sec.
File size 132,598,959 bytes, 4232 seconds Total data rate 251 kbps, audio out of sync. |
Audio codec settings for all videos: Codec: MPEG-4 Audio, Sample Rate: 44.1 kHz, Depth: 16 bit, Channels: Mono,
Compressor: AAC, Bit Rate: 20 kbps, Output Sample Rate: 22.05 kHz, Encoder Quality: Best
These videos are to be used only for educational purposes
Some Video and Audio from Final Cut Pro tutorial, Property of Apple Computer, Inc.
Graphics from Adobe Creative Suite, Stock Art, Property of Adobe Systems, Inc.
Susan Orlean videos captured with Sony PD-150 miniDV.
If you have problems playing the videos please contact fful@conncoll.edu