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Wiki > Main > CodecTesting (r2)

Codec Optimization Testing

Explination

This page is meant to gather the result of the test_codec viewer from all different codecs on all different platforms. Since the viewer measures results in percent realtime, it should not make a difference how long the song is. You will need to compile your own build of rockbox in order to compile the test_codec viewer. Please test with your DAP and post the results in the same format as the first one.

Results

Iriver H10

Codec Settings Result File size
WAV None >1000% realtime 29.7 MB (31,211,242 bytes)
FLAC L0 660.67% realtime 25.1 MB (26,326,270 bytes)
FLAC L5 473.45% realtime 23.7 MB (24,872,743 bytes)
FLAC L8 386.14% realtime 23.6 MB (24,836,771 bytes)
OGG Q4/~128kbps 169.47% realtime 2.88 MB (3,025,123 bytes)
OGG Q7/~224kbps 148.12% realtime 5.34 MB (5,605,922 bytes)
MP3 - P CBR-128kbps 187.07% realtime 2.70 MB (2,832,512 bytes)
MP3 - P CBR-192kbps 182.91% realtime 4.05 MB (4,249,728 bytes)
MP3 - P ABR-128kbps 187.07% realtime 2.58 MB (2,713,728 bytes)
MP3 - P ABR-192kbps 182.83% realtime 3.93 MB (4,128,896 bytes)
MP3 - P VBR-V5 (~130kbps) 185.05% realtime 2.96 MB (3,113,088 bytes)
MP3 - P VBR-V2 (~190kbps) 176.95% realtime 5.16 MB (5,415,040 bytes)
MP3 - SVN CBR-128kbps 155.26% realtime 2.70 MB (2,832,512 bytes)
MP3 - SVN CBR-192kbps 152.49% realtime 4.05 MB (4,249,728 bytes)
MP3 - SVN ABR-128kbps 155.37% realtime 2.58 MB (2,713,728 bytes)
MP3 - SVN ABR-192kbps 152.49% realtime 3.93 MB (4,128,896 bytes)
MP3 - SVN VBR-V5 (~130kbps) 153.92% realtime 2.96 MB (3,113,088 bytes)
MP3 - SVN VBR-V2 (~190kbps) 148.24% realtime 5.16 MB (5,415,040 bytes)

Notes

The codec MP3 - P is the MP3 codec with the mpa_removed_iram.patch applied.

WAV result is estimated. The test_codec plugin said "File too big".

This test was done with the song "Hold On" by Green Day on their CD Warning. The track was ripped from the CD each time it was encoded.
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r2 - 24 May 2007 - 22:18:56 - BobbyGraese
Copyright by the contributing authors.