pkendall64 at gmail
Apr 4, 2012, 12:46 PM
Post #6 of 33
On Wed, Apr 4, 2012 at 9:29 PM, Brett <mythicalbeast [at] slingshot> wrote:
> On Wed, 2012-04-04 at 07:39 +1200, Paul Kendall wrote:
>> On Tue, Apr 3, 2012 at 5:45 PM, Brett <mythicalbeast [at] slingshot> wrote:
>> > Anybody else getting occasional audio pauses/silence (1/2 to 3 sec long
>> > at a rate of 2-5 times an hour) with recording from Prime dvb-t over the
>> > last 2-3 weeks?
>> Now that you mention it, I did notice this in 'Mayday' that I watched
>> and was recorded on Prime.
>> I'll check my next recording from Prime and see if it happens again.
>> > Both 0.24+fixes & 0.25 (2 weeks old) show this problem.
>> > Transcoding latm to AAC (libfacc) with latest ffmpeg plays fine , so
>> > does ancient VLC 1.0.6.
>> If it transcodes correctly then it may be that our ALSA buffer is set
>> slightly too small.
>> Perhaps prime has moved from stereo to 5.1 sound and now the buffers
>> are sometimes
>> a little too small.
>> I'll check tonight and again when Mayday records on Sunday night.
> I tried
> echo 512 | sudo tee /proc/asound/card0/pcm1p/sub0/prealloc
> and other much larger numbers; made no difference.
> Is this the same buffer you refer ?
Yes, that's the one I was talking about.
> mediainfo reports typical Prime as:
> 04/04/2012 as 2 ch HE-AAC/LC max 99Kbps
> 05/01/2012 much the same...
I have a recording from last night and was going to check this over easter.
I want to check to see that when it occurs if it is repeatable at the
or if it is semi-random when it occurs.
What are your audio settings i.e. are you upmixing to 5.1 from this
What is the upmixer set to, best, etc, (not at my machine so I cant
remember them off hand).
It may be that we can adjust these to work around the problem.
Like I said, I'll play around over easter and let you know.
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