Does anyone know if GCC 2.95.2 compiles a broken oggenc? My .ogg files sound like they're being played by a CD player stuck on fast- forward. . . . And I wonder what the solution is. Philippe (YellowDogLinux 1.2.1 (a Red Hat 6.2 derivative) on an iMac) -- --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'vorbis-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.
On Sat, 13 Oct 2001, Philippe Tapon wrote:> Does anyone know if GCC 2.95.2 compiles a broken oggenc? My .ogg files > sound like they're being played by a CD player stuck on fast- > forward. . . . And I wonder what the solution is. > > Philippe > > (YellowDogLinux 1.2.1 (a Red Hat 6.2 derivative) on an iMac)Hmm. I'm going take a wild guess as to what the problem is, since your symptoms resemble a problem I've seen twice before (stop me if any of this inaccurate): I think the problem is not with oggenc (the compiler issue you refer to generates artifacts, but not fast-forward like behavior), but rather with libao, the library that does audio output for ogg123. If you are not using ogg123, then I'm totally wrong. However, if you are, you would be the third Linux+Mac user to observe this problem. It occurs because libao opens the audio device in non-blocking mode and then turns blocking on after the device is open. (There are good reasons for this, which I can explain if you care.) However, one or more of the audio drivers for Linux on PPC seem to be ignoring the second call in libao that turns the blocking flag back on. This is a bug in the audio driver and not libao, however. Please see http://bugs.xiph.org/show_bug.cgi?id=48 for a patch to libao to work around this problem. You'll note in my explanation on Bugzilla that I want to make a configure test to check for this bug, but I don't know how to test for it, so I haven't yet. If anyone has some good ideas let me know. Can you tell me which kernel modules you use for sound? Also, I would suggest you contact the maintainer of the sound drivers you are using, explain your problem and point them at the bug page I listed above. You can also give them my email address if they need a more detailed description of the bug. --- Stan Seibert --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'vorbis-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.
> I recommend a newer BK kernel.. Preferably something based on 2.4.10-ac12,> if you can find it.Thank you for the advice. Alan Cox's page http://www.kernel.org/pub/linux/kernel/people/alan/linux-2.4/2.4.12/ eems to have something close to the 2.4.12-ac12 patch (and the source is kernel.org) but he calls the patch "decidedly experimental." Call me shy. . . . Philippe -- --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'vorbis-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.
> I'm subscribed to the Linux Kernel mailing list, and people seem to be > having good results with 2.4.12-ac1. > However, I'd still get 2.4.10-ac12, if I were you. More kinks areironed> out.Thanks, Wilson, for the advice. (I'm new to this and post it for the benefit of those who are newer than I am:) Here is Alan Cox's patch---- http://www.kernel.org/pub/linux/kernel/people/alan/linux- 2.4/2.4.10/patch-2.4.10-ac12.bz2 BitKeeper is here---- http://www.ppckernel.org/bk-2.4-stable/linux-bk-2.4-stable-2.4.10- pre2.tar.gz I've not had much luck rolling my own kernels, but if this 2.4.10-ac12 kernel really does make a difference, for Linuxppc people, for rolling a working Vorbis, I will try my best. I am watching the ALSA/libao discussion with interest but without a clear sense of what I should do. (Besides get a newer kernel. =) Philippe -- --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'vorbis-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.