Support and General Use > Audio Playback, Database and Playlists
Ogg playback?
bioxeed:
I've recently started playing with rockbox on my H340 and overall I must say I'm quite impressed. I'll probably even get the cross complier set up so I can hack a bit myself. But that aside right now all my oggs skip. I rip them at Q8 so the average bitrate of them is > 250kbps. Is this a limitation of rockbox on the H3xx or just a case of needing optimisation?
ts-x:
I read in the logs somewhere that Q7(?) and above Ogg's are having issues related to the CPU frequency cap currently employed for the H3xx builds. All my Ogg's are Q9, so I'm holding off installation for this very reason. Judging by what I've seen so far from the Rockbox team, I'd imagine this issue will be resolved in the not too distant future.
lostlogic:
Yeah, anytime the vorbis stream goes over 300kbps for extended periods, it can't keep up. This is because 1) the Tremor decoder is not yet well optimized and 2) rockbox on the H340 only runs at 90mhz boost currently. The other side effect of this is that when playing OGG/Vorbis files is BRUTAL on battery life currently. Hopefully once we get some better profiling information from the decoder (see my thread on profiling for my progress in that arena), the decoder can be better optimized so that even at 90mhz it won't be skippy.
moozooh:
--- Quote from: ts-x on December 04, 2005, 05:45:32 PM ---All my Ogg's are Q9, so I'm holding off installation for this very reason
--- End quote ---
???
Why don't you use aoTuv beta 4.51 with less bitrate bloating settings, like -q5 or -q6? You'll get hard time ABX'ing them even on your desktop, anyway.
Not to mention the battery life of your DAP.
ts-x:
--- Quote from: moozooh on December 06, 2005, 05:19:07 PM ---
--- Quote from: ts-x on December 04, 2005, 05:45:32 PM ---All my Ogg's are Q9, so I'm holding off installation for this very reason
--- End quote ---
???
Why don't you use aoTuv beta 4.51 with less bitrate bloating settings, like -q5 or -q6? You'll get hard time ABX'ing them even on your desktop, anyway.
Not to mention the battery life of your DAP.
--- End quote ---
Well at the time I encoded them, only aoTuv b3 was available (and I'm definitely not re-encoding 2500 songs!). Believe it or not, using the optical out (non-Rockbox) on my old H120 I could clearly tell the difference between Q6 and Q9 on my home stereo. Subtle details like echo and reverb were missing from the Q6 as compared to the Q9. I did however, notice very little difference between Q6, Q7, & Q8. If I didn't have the luxury of 40gb on my new H340 I would have gone Q6 (it still sounds great). Battery life is not really much of a concern for me - 99% of my listening is done in the car or at the office with external power the entire time.
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