Hi Luiz, >>> Legacy bluetooth codecs have a latency of ~200 ms or more, which creates >>> a noticeable lag when watching videos or during voice calls. >>> >>> The AptX Low Latency (LL) codec can provide a stable connection with at >>> most 40 ms of latency. >>> >>> - Is there a way to get AptX LL to work on Linux? >>> - Are there alternatives for a low latency Bluetooth connection? >> >> with BlueZ for Android we actually had AptX working (given CSR provided you with a correct binary). > > There is a pretty old patch for PulseAudio that enables AptX: > > https://build.tizen.org/package/view_file/Tizen/pulseaudio/0020-add-bluetooth-a2dp-aptx-codec-support-samsung.patch?expand=1 > > It doesn't have the actual AptX library, which I guess cannot be > distributed under the same license. We could perhaps have OPUS (which > should perform quite well) instead which should be available in all > distros already, that said no headset or phone would support it > initially, though it wouldn't be a problem for phones to add support > for it since it has been in use in WebRTC, youtube, skype, etc. actually it seems FFmpeg has an open source aptX encoder and decoder. https://patchwork.ffmpeg.org/patch/5879/ https://github.com/FFmpeg/FFmpeg/blob/master/libavcodec/aptx.c So I think someone could extend PA to use FFmpeg’s aptX and just enable aptX for all devices. Regards Marcel -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
