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Echoing Hiroka, who is likely on the right track. Simply telling the encoder 'one channel' and then passing stereo data will not convert the stereo data to mono. The encoder encodes whatever it is given... Monty On Tue, Jan 3, 2017 at 6:51 PM, IHARA Hiroka <ihara_h at live.jp> wrote: > Hello Ross, > > The attachment appears at least to me as a valid monaural Vorbis audio. > > It says in its header that there is only one audio channel, no stereo > mapping is in use, and there is only one audio vector per frame. > > Actually it does n...

I’m using a Windows development component which uses vorbis.dll, ogg.dll, vorbisenc.dll for encoding an Ogg Vorbis file. It's all working well except for one user occasionally has a 1 hour file appear as 2 hours and it plays at half speed. It is being converted from stereo to mono before feeding the encoder with a channels=1 configuration. Here is an example file which will be available for

...ould be HALF the sum of blocksizes through the stream, due to overlap-add process in MDCT. I hope my answers would help, please excuse me if I made some mistakes regarding English. Regards, Hiroka -- Hiroka Ihara Department of Information and Communication Engineering, the University of Tokyo PC: ihara_h at live.jp From: Blake Martin [mailto:blakemartin.official at gmail.com] Sent: Friday, December 04, 2015 5:43 PM To: Hiroka IHARA <ihara_h at live.jp> Cc: vorbis-dev at xiph.org Subject: Re: [Vorbis-dev] A few questions about libvorbis from a newbie Okay, I understand how the number of sam...

...and I am quite certain that it would be very nice if these points are clarified by official documentation. Please excuse me if there are any misuse of English, as I am not used to. Regards, Hiroka -- Hiroka Ihara Department of Information and Communication Engineering, the University of Tokyo PC: ihara_h at live.jp

...eam to be transcoded. You might want to supply more pieces of information which you think are relevant to the transcoding process (original stream, encoder settings and so on). Regards, Hiroka -- Hiroka IHARA Department of Information and Communication Engineering, The University of Tokyo ihara_h at live.jp On 2017年01月04日 07:31, Ross Levis wrote: > I’m using a Windows development component which uses vorbis.dll, ogg.dll, vorbisenc.dll for encoding an Ogg Vorbis file. It's all working well except for one user occasionally has a 1 hour file appear as 2 hours and it plays at half spee...

Sorry about the personal reply Ian. I hope keeping the subject the same is the way to reply to the list (I have never used a mailing list before). The last thing I am not grasping is how *pcm_total *works without a concept of sample size? If the sample size is whatever I decide to read it as, how does it calculate the number of samples (of one channel I'm assuming because we have to multiply

...f this information to seek through the audio, and to provide information about the uncompressed PCM position, without actually decoding the Vorbis packet enclosed in the Ogg stream. Regards, Hiroka -- Hiroka Ihara Department of Information and Communication Engineering, the University of Tokyo PC: ihara_h at live.jp From: vorbis-dev-bounces at xiph.org [mailto:vorbis-dev-bounces at xiph.org] On Behalf Of Blake Martin Sent: Friday, December 04, 2015 2:10 PM To: vorbis-dev at xiph.org Subject: [Vorbis-dev] A few questions about libvorbis from a newbie Sorry about the personal reply Ian. I hope keep...