search for: somweyr

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2017 Nov 16
1
Gapless concatenation of Opus frames
...cannot hear any glitches in continuous.opus, continuous.wav, and chained.wav. chained.opus decodes just fine with opusdec as well, but doesn't play properly in any standard audio player. In my adapted version of opusenc_example [1] the clicks are pretty audible once the drum kicks in: https://somweyr.de/opus/chained.wav This file was produced by first decoding the blocks and then concatenating ( for i in `find blocks -name '*.ogg' | sort -n`; do opusdec $i -; done ) | aplay -f dat but oddly I get the same result if I concatenate all the opus blocks I've generated into a single fi...
2017 Nov 15
2
Gapless concatenation of Opus frames
...). Any idea how any of the two issues (either in libopusenc or in my program) might be solved? Again, thank you for your help! Cheers, Andreas [1] https://github.com/astoeckel/opus_gapless/blob/master/lpc.cpp [2] https://gist.github.com/astoeckel/6731bc846a2f70dd7f5e155e75683fae [3] https://somweyr.de/opus/click_opus_gapless.png [4] https://somweyr.de/opus/click_libopusenc.png [5] https://somweyr.de/opus/test_libopusenc_ope_encoder_continue_new_file.raw.bz2 [6] https://www.youtube.com/watch?v=z64HCi2rQkE [7] https://github.com/astoeckel/opus_gapless/blob/master/opus_gapless.cpp#L82 >...
2014 Aug 10
1
High Frequency Hiss with Opus at 48 kbit/s
...s WMAPro does not seem to have this issue (although it audibly seems to change the bitrate after a few seconds). The hiss is (at some extend) already present in the original file, yet Opus seems to amplify it. You can find the example uploaded here (please ignore the certificate warning): https://somweyr.de/public/opus_test.tar The files were produced using the following command lines: > opusenc --bitrate 48 test.wav test.opus > wine xWMAEncode.exe -b 48000 test.wav test.wma opusenc version is opusenc opus-tools 0.1.9 (using libopus 1.1) I used ffplay (version 2.1.5) for playback. Is th...
2017 Nov 16
0
Gapless concatenation of Opus frames
...> program) might be solved? > > > Again, thank you for your help! > > Cheers, > Andreas > > > [1] https://github.com/astoeckel/opus_gapless/blob/master/lpc.cpp > > [2] https://gist.github.com/astoeckel/6731bc846a2f70dd7f5e155e75683fae > > [3] https://somweyr.de/opus/click_opus_gapless.png > > [4] https://somweyr.de/opus/click_libopusenc.png > > [5] > https://somweyr.de/opus/test_libopusenc_ope_encoder_continue_new_file.raw.bz2 > > [6] https://www.youtube.com/watch?v=z64HCi2rQkE > > [7] > https://github.com/astoeckel/op...
2017 Nov 16
2
Gapless concatenation of Opus frames
...hat this won't cause clicks, but instead cause possibly audible distortions. Sorry for my general confusion, I've never used an audio codec at such a low level before. Cheers, Andreas [1] https://github.com/astoeckel/opus_gapless/tree/2e664a81f1ce852183995971a3d26b61b676aa09 [2] https://somweyr.de/opus/opus_chaining_working.pdf On 2017-11-13 04:24 PM, Jean-Marc Valin wrote: > Hi Andreas, > > Considering you're switching to Ogg, I think you should give libopusenc > a try. It does a really good job at getting rid of *all* discontinuities > -- to the point where you can...
2017 Nov 13
3
Gapless concatenation of Opus frames
Hi Jean-Mark, thank you for your answer! Yes, you understood my question correctly. I was just about to compose a reply to my original question, where I described how I solved my problem. As you've already suggested, I've switched to Ogg/Opus, which is better supported, but does not work with the Media Source Extensions. I'll have a look whether disabling prediction will help with
2017 Nov 16
0
Gapless concatenation of Opus frames
...ibly audible distortions. > > Sorry for my general confusion, I've never used an audio codec at such > a low level before. > > Cheers, > Andreas > > [1] > https://github.com/astoeckel/opus_gapless/tree/2e664a81f1ce852183995971a3d26b61b676aa09 > > [2] https://somweyr.de/opus/opus_chaining_working.pdf > > > On 2017-11-13 04:24 PM, Jean-Marc Valin wrote: >> Hi Andreas, >> >> Considering you're switching to Ogg, I think you should give libopusenc >> a try. It does a really good job at getting rid of *all* discontinuities >...