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.