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. However, the results from my latest patched build are different from previous tests. I will re-build and try again later.

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