Sansa Clip + Opus Stkov when Fast-Forward/Rewind

[g.orlandini]

Hi all,

I get the same panic error (Stkov codec pc: 3006006c sp:30803b A: 3008728c) when I Fast-Forward/Rewind an opus file in my Sansa Clip+ (Rockbox 47d0537 2015-05-18). It doesn't happens always but quite often (I'd say 50%) and I have to reboot.

The opus files are speech podcast that I transcoded from a 160 Kb 44100 Hz stereo mp3 to 24 Kb 48000 Hz mono opus. I know it's not advisable to transcode but I get to squeeze the 100 MB mp3 speech podcast in a 15 MB opus file with still a very good quality.

I used different options in opusenc 1.9 like different complexity (--comp 8 or 9 instead of the default 10), discarding metadata (--discard-comments --discard-pictures) and changing framesize (60 instead of 20 as default) but I didn't change anything.

I guess the error is stack overflow but I don't know how to solve it (increase some buffer?)

Thanks a lot for your help

[g.orlandini]

Hi all,

after some testing I've found that encoding opus file with complexity 5 seems to be safe for Fast-Forward/Rewind along opus file. Quality is quite worse, size is 3-4% bigger than encoding with complexity 10. I've found the same error in this mail http://www.rockbox.org/mail/archive/rockbox-archive-2014-10/0000.shtml (Seeking in opus files leads to PANIC).

I hope this helps opus users