search for: gapless

Hi, i?m not part of the FLAC project, but i have a question regarding FLAC and Gapless support I hope, I get an answer from some of you ;-) We are currently try to add Gapless support on our device If we rip an CD with our device, we can find out, that one track follow after another so we can recognize, that the tracks are gapless or not. But how can we find that out on already...

On Tue, Jan 17, 2012 at 09:44:25AM +0100, rs at noveltech.de wrote: > We are currently try to add Gapless support on our device? If we rip an CD > with our device, we can find out, that one track follow after another so we > can > recognize, that the tracks are gapless or not. Are you aiming for maximum compatibility with how the source CD would be played on an average CD audio player? Or ju...

...ng list. ----- Forwarded message from Jamie Heilman <jamie@audible.transient.net> ----- Date: Sun, 8 Sep 2002 16:13:32 -0700 From: Jamie Heilman <jamie@audible.transient.net> Resent-From: Jamie Heilman <jamie@audible.transient.net> To: submit@bugs.debian.org Subject: Bug#160155: gapless playback Package: xmms-flac Version: 1.0.3-3 Severity: wishlist As flac is capable of gapless playback it would be groovy if the plugin supported it. I hear audible loss when switching between tracks, sometimes the last second of a track is simply not played before the next track starts. I'...

...rom Jamie Heilman > <jamie@audible.transient.net> ----- > > Date: Sun, 8 Sep 2002 16:13:32 -0700 > From: Jamie Heilman <jamie@audible.transient.net> > Resent-From: Jamie Heilman <jamie@audible.transient.net> > To: submit@bugs.debian.org > Subject: Bug#160155: gapless playback > > Package: xmms-flac > Version: 1.0.3-3 > Severity: wishlist > > As flac is capable of gapless playback it would be groovy if the > plugin supported it. I hear audible loss when switching between > tracks, sometimes the last second of a track is simply not play...

...re for some platforms) doesn't support CUE sheets natively, and i don't really recall any frameworks that do (not that i know that many...). CUE sheet support has to be implemented on top of the framework, and might not be as straightforward as it sounds (especially if you want to also have gapless playback). Clementine audio player, for example, still can't get CUE sheets right, and QuodLibet audio player doesn't support them at all. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQEcBAEBAgAGBQJPKwvTAAoJ...

We all know that currently Vorbis is the only codec out there that doesn't add any silence to the decoded file, so when you decode your .ogg file the resulting .wav will be exactly the same length as the original one. This is very useful when encoding gapless songs (like live concerts...). But since Vorbis is a lossy codec, even though there is no silence added, sometimes you can still hear a click between gapless tracks because the end of the first song doesn't match up with the beginning of the second song. This doesn't happen always and as yo...

Assuming I have a WAV file that represents a continous performance, e.g. a recording of a live concert, which I want to play continously on a CD but nevertheless have track marks so that individual items can be selected some WAV splitting programs offer the ability to split the file into pieces which are an exact multiple of the CD sector size so that when recording all these files to CD with no

...dio as opus/WebM using the HTML5 media source extensions. Currently, > the server decodes a set of input files to a fixed RAW audio format > (stereo, 48000 kHz) and encodes the resulting continuous RAW stream as > Opus/WebM. Having a single, uninterrupted RAW stream allows for > perfect gapless playback on the client (which only sees a single live > WebM stream), e.g. there are no interruptions whatsoever when > transitioning between continuous tracks from the same music album. > > An early tech-demo of the technique can be found here [1], the source > file http_audio_serv...

...cket basis. > > However, playing back individual WebM streams with CodecDelay and > DiscardPadding set (and an additional lead-out frame) did not work, > since CodecDelay/DiscardPadding were only insufficiently interpreted > by Chromium/Firefox and even ffmpeg. There is a method for gapless > concatenation of entire files using MSE, described here [2], but this > didn't work for Firefox and still produced audible artifacts on Chrome. > > > Well, the way I'm solving the problem now is the following: > > First, I've switched to Ogg/Opus. Second, I'...

...o limited, because the basic > idea, as I understand it, is to extend the .m3u playlist format so that > stream listeners can automatically choose alternative sources for the > same content. That could be implemented in a codec-agnostic way. Stitching together compressed media streams for gapless playback isn't trivial, and in particular while .ogg and .opus support sample-accurate cuts and cross-lapping for gapless transitions between arbitrary segments, mp3 and aac do not. Moreover, part of the point of HLS was to support bitrate switching for video, so there's an additional synch...

...an; > the complete song can be downloaded here [6]). > > 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_con...

...ks. My guess is that 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 >>...

...yer which streams audio as opus/WebM using the HTML5 media source extensions. Currently, the server decodes a set of input files to a fixed RAW audio format (stereo, 48000 kHz) and encodes the resulting continuous RAW stream as Opus/WebM. Having a single, uninterrupted RAW stream allows for perfect gapless playback on the client (which only sees a single live WebM stream), e.g. there are no interruptions whatsoever when transitioning between continuous tracks from the same music album. An early tech-demo of the technique can be found here [1], the source file http_audio_server/encoder.cpp implements...

...eams, and not on a per-packet basis. However, playing back individual WebM streams with CodecDelay and DiscardPadding set (and an additional lead-out frame) did not work, since CodecDelay/DiscardPadding were only insufficiently interpreted by Chromium/Firefox and even ffmpeg. There is a method for gapless concatenation of entire files using MSE, described here [2], but this didn't work for Firefox and still produced audible artifacts on Chrome. Well, the way I'm solving the problem now is the following: First, I've switched to Ogg/Opus. Second, I'm appending a reversed version of...

...ue? When I increase the encoding complexity to 10, this won't have any noticeable effect on the decoding complexity, right? Last but not least, since my purpose would be listening to music, is it best to set the framesize to its maximum (60ms)? And will this have any bad side effects, like on gapless playback or so? Thanks, Chris. -------------- next part -------------- A non-text attachment was scrubbed... Name: smime.p7s Type: application/x-pkcs7-signature Size: 5313 bytes Desc: not available Url : http://lists.xiph.org/pipermail/opus/attachments/20151026/1e664233/attachment.bin

Mike... did you look into this? I posted a waveform from a file generated by ogg123 dumping to a wav (so that audio driver problems were eliminated). It looks to me like ices2 is restarting the vorbis encoder in a non-gapless way when it stops and starts the encoding (to change the stream id and update the metadata). Because I'm doing crossfades from one track to another, this shows up. If you were just playing one track after another, letting them play to the end before starting the next one, updating the metad...

...tnet.co.uk> wrote: > > Mike... did you look into this? I posted a waveform from a file > > generated by ogg123 dumping to a wav (so that audio driver problems were > > eliminated). > > > > It looks to me like ices2 is restarting the vorbis encoder in a > > non-gapless way when it stops and starts the encoding (to change the > > stream id and update the metadata). Because I'm doing crossfades from > > one track to another, this shows up. If you were just playing one track > > after another, letting them play to the end before starting the ne...

...f just concatenating. Will report whether this works. My guess is that 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 gett...

does ogg vorbis or any other format currently allow say, a whole cd recorded and compressed into one file, but with points stating where one track begins and ends, so you can just play certain songs out of this file, or possibly cut songs out of the file into seperate tracks. or is there any format that will do this in the future? (like ogg vorbis maybe). just wondering, thanks! Andy

...downloaded here [5] (48000 Hz, stereo, 16-bit signed, little endian; the complete song can be downloaded here [6]). 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.youtu...