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No sound on Twitter vids
Posted by: Mello
Date: July 24, 2018 01:12AM

Visuals play O'k.

But have to open page in chrome to get sound

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Re: No sound on Twitter vids
Posted by: hermes
Date: July 24, 2018 12:37PM

@Mello

I no have Twitter account, but similar problem was in Google translator. For me this problem has been solved by manual DirectShow filter registration in system (with regsvr32). In my case, it was L3CODECx.AX, but MP3 was necessary for google. I can assume that at you the AAC decoder can be required, but it is only a hypothesis.

I recommend will study this table (in bottom of article): https://en.wikipedia.org/wiki/HTML5_audio

This table of support audio formats for WEB (pay attention to Firefox column i.e. if decoder is present at OS this format is supported). KM as FF supports DirectShow and ACM system decoders. You can look the graph of system filters to understand what isn't enough. For this can be used GraphEdit from M$: https://en.wikipedia.org/wiki/GraphEdit .

Or for tests of support can use prehistoric versions of MPC (not modern!). I have a MPC v.6.4.00.0002 archive version from 2002 (279 KB in size). This is very simple and small media player and not have no one internal decoder (now fashionably build all players with kodecpaks inside). Similar software is the ideal ground for tests of support. Also old WMP v6.4 or mplay32 will approach (he is absent in newer OS's).

By the way, it is necessary to consult to siria and it is possible to include this info in FAQ. It is a standard problem, but it is difficult for the decision without some technical knowledge.



Edited 2 time(s). Last edit at 07/24/2018 12:45PM by hermes.

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Re: No sound on Twitter vids
Posted by: siria
Date: July 24, 2018 04:03PM

Sorry no idea, but perhaps try: Open about:config, filter for "media" and look around for suspects in that evergrowing jungle...

Someone in the PaleMoon-Forum mentioned if twitter has no sound, it's just missing codecs, which can be installed from K-Lite Codec pack or such. Perhaps.

https://help.twitter.com/en/using-twitter/twitter-videos
Quote

We currently support MP4 and MOV video formats on mobile apps.
On the web, we support the MP4 video format with H264 format with AAC audio

On MSFN an XP-user wrote:
https://msfn.org/board/topic/175591-enable-mp4-h264-aac-html5-video-in-firefox-on-windows-xp-without-flash/?page=19
Quote

all twitter videos appear with sound turned off by default for me, both on Serpent 2018.05.25 and on FF 52.8.1 esr, so that, if I want sound, I must turn it on explicitly, in the player window.

Not twitter, but interesting: Youtube checks also the useragent, and if it contains XP (NT5.1) it delivers another format:
https://en.wikipedia.org/wiki/Youtube
Quote

The default video stream is encoded in the VP9 format with stereo Opus audio; if VP9/WebM is not supported in the browser/device or the browser's user agent reports Windows XP, then H.264/MPEG-4 AVC video with stereo AAC audio is used instead.


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Re: No sound on Twitter vids
Posted by: hermes
Date: July 24, 2018 05:22PM

@Mello

Simple way: LAV filters v.0.69 (~7 Mcool smiley
https://github.com/Nevcairiel/LAVFilters/releases/download/0.69/LAVFilters-0.69-x86.zip

Unzip, run install_splitter.bat, install_audio.bat (can and install_video.bat). Test!

Advanced way: http://kmeleonbrowser.org/forum/read.php?19,146774,146776#msg-146776



Edited 1 time(s). Last edit at 07/24/2018 05:23PM by hermes.

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Re: No sound on Twitter vids
Posted by: Mello
Date: July 24, 2018 06:52PM

Thank you hermes & siria.

You've taken a lot of trouble to help me. Now I feel a bit silly
for not noticing this was the answer:

Quote
siria
all twitter videos appear with sound turned off by default for me, both on Serpent 2018.05.25 and on FF 52.8.1 esr, so that, if I want sound, I must turn it on explicitly, in the player window.

Aside from play the twitter video controls only appear on mouseover and Volume is disabled by default using K-M, but not with Google's Chrome browser.

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