Mailinglist Archive: opensuse-factory (454 mails)

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Re: [opensuse-factory] Sound delayed when playing via HDMI


On 24/12/17 16:31, Basil Chupin wrote:
On 24/12/17 09:41, John Paul Adrian Glaubitz wrote:
On 12/23/2017 11:27 PM, Carlos E. R. wrote> Don't the signals have
"timestamps" that can be used to sync the processing exactly?

HDMI has something like that, yes [1].

Maybe the monitor is too old to support HDMI 1.3? No idea.

Which is probably the case. If you look at the description of HDMI in
Wikedia you will read that there is a strong probability that there may
be an incompatibility between the monitor and the computer:

https://en.wikipedia.org/wiki/HDMI

in particular the section :Personal Computers.

[1] https://www.eetimes.com/document.asp?doc_id=1273833

BC

PS You don't mention whether you are using the sound on the mobo or a
PCI(e) sound card, nor which video card to be able to use VLC, nor which
monitor you have. Providing such info is most useful to have one's
problem resolved (often) quicker.


If the sound is going through HDMI then the Video card that is
outputting the HDMI signal will also be treated as the sound card. Given
it is just forwarding the digital audio signal via HDMI it shouldn't be
doing much processing though.

Another thing to check is that your playback sample rate isn't too high
and matches one that can be sent over HDMI otherwise your sound card is
having to convert the digital signal which it may not be good at. I
don't know how to check / set that with pulse audio though.

--

Simon Lees (Simotek) http://simotek.net

Emergency Update Team keybase.io/simotek
SUSE Linux Adelaide Australia, UTC+10:30
GPG Fingerprint: 5B87 DB9D 88DC F606 E489 CEC5 0922 C246 02F0 014B

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