[mythtv-users] Size of firewire recordings

[Justin Moore]

>
> I am in the Atlanta area. Do you know about how many null packets you were
> seeing? Even with a raw feed taken from the box using test-mpeg2, I am
> seeing only about 14% of the packets with the video PID (fewer for the
> audio).
>

Here's a recording from June of 2013 with 5% video, 0.5% audio, and 94.5%
null packets.

mythutil --pidcounter --infile /myth/Recordings/2162_20130625160000.mpg
Unknown argument for -v/--verbose:
2015-04-13 07:24:46.791999 C  mythutil version: fixes/0.27
[v0.27.4-27-g40506c2] www.mythtv.org
2015-04-13 07:24:46.792007 C  Qt version: compile: 4.8.6, runtime: 4.8.6
2015-04-13 07:24:46.792012 N  Setting Log Level to LOG_INFO
PID 0x1fc5 --     4948982
PID 0x1fc6 --      471444
PID 0x1fff --    91303599

I'll try and dig up the scripts and email them to you directly.

I wonder if this is a transcoding or muxing issue somewhere in the Comcast
content delivery pipeline.
-jdm


>
> I would be interested to see the scripts if you have them.
>
>
>
> On 4/10/15, 7:40 AM, "Justin Moore" <justin.nonwork at gmail.com> wrote:
>
> Sorry for the double e-mail.
>
> It seems like there are an awful lot of null packets in the stream:
>
>
> Are you in the SF Bay Area? I ran into this problem starting around
> February or March of 2013 (IIRC). Overnight my HD recordings went from
> ~6GB/hour to 18GB/hour. I made a few calls to tech support but they
> (obviously) had no idea what I was talking about and didn't ever transfer
> me to someone who knew enough to address the problem. I finally gave up
> because I was moving in a few months and it wasn't worth my time.
>
> Are you also seeing recordings fail? I had a number that did that because
> Myth wouldn't get the right PMT/PAT packets within a given deadline (they
> were buried in the flood of NULL packets) so I had to hack around that. If
> you're seeing that I may still have the scripts sitting around.
>
> If you ever do track down what the root cause is I'm really curious as to
> what it is.
>
> -jdm
>
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