I asked for comments on the #xiph IRC channel, and got these comments: <mark4o> 500 Hz is a really low sample rate for audio <OmniMancer> would anyone ever use 500Hz for actual Audio? or are they likely recoding some other signal? <TD-Linux> I can't think of a use case. but it shouldn't crash <OmniMancer> well yes, crashing is bad :/ <erikd> if vorbis can't handle really low sample rates it should validate its inputs and reject them <mark4o> it's not vorbis itself it's the resampler <erikd> its the resampler that crashing? <mark4o> the code in oggenc that calls the resampler apparently <mark4o> which looks like it was rewritten in opusenc, maybe it can be copied from there, not sure <OmniMancer> I am glad that atleast in FLAC sample rate is just metadata :) <mark4o> it is in vorbis also, but oggenc has an option to resample it first; not sure why <OmniMancer> vorbis is lossy and uses frequency space transforms though? <mark4o> yes <OmniMancer> so the sample rate could affect the result of coding? <mark4o> I'm pretty sure it affects at least frame durations, but I'm not a vorbis expert.
Perhaps something to investigate? -- Happy hacking Petter Reinholdtsen
