[Solved] ARMv5: Bad audio on descrambled channels (with echo)

Hi,

I am experiencing the exact same problem which was described over a year ago [[https://www.lonelycoder.com/redmine/boards/5/topics/3011]] already. However, there seems not to have been a solution.

I am running tvheadend on a Dockstar. I compiled tvheadend yesterday after git cloning it and oscam is fairly recent. On a similar setup with vdr, audio and video are both more or less ok, while with tvheadend audio (any type, AC3 as well as MP2) has echos.

The funny thing is that this is not apparent when I watch the live stream or a recording using VLC, but with XBMC or mplayer, sound is not ok.

This is my server:

└──> uname -a
Linux dock-tvheadend 3.8.11-kirkwood-tld-3 #2 PREEMPT Fri Jun 14 07:51:05 PDT 2013 armv5tel GNU/Linux
└──> lsb_release -d
Description:    Debian GNU/Linux 7.1 (wheezy)
└──> tvheadend --version
tvheadend: version 3.5.225~g5956233

Any suggestions?

Cheers,

chessplayer

Replies (2)

Solution: ARMv5: Bad audio on descrambled channels (with echo) - Added by Chess Player over 11 years ago

So, to answer my own question, here is the solution:

As has been stated numerous times on the relevant forums dealing with oscam etc., it is necessary to make sure that cpu-alignment is set to "fixup", which is achieved by the following command:

echo 2 > /proc/cpu/alignment

Myself, I put this line into /etc/rc.local, so it will automatically be written on startup.

Hope this helps somebody else as well.

Also, be aware that this should also be done before you even compile tvheadend.

RE: [Solved] ARMv5: Bad audio on descrambled channels (with echo) - Added by Flind Tv over 11 years ago

Thanks Chess Player! It did help somebody.

I used a Pogoplug (E02) sometime ago and stumbled on this problem. Have been using a Intel based setup for years without problems, but could not solve this problem. Couple of days ago build a complete new setup with Bodhi's kernel 3.9.11 with dvb support and the latest tvheadend and oscam compiled with your fix... it works like a charme!

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