[mythtv-users] UK recording Freeview HD while watching an SD program

Paul Gardiner lists at glidos.net
Tue Nov 15 15:32:50 UTC 2011

On 15/11/2011 14:44, Mark Lord wrote:
> On 11-11-15 06:43 AM, Simon Jones wrote:
>> On 15 November 2011 10:56, Paul<dazzle at edazzle.net>  wrote:
>>> If I am watching an SD recording and recording an HD show at the same time
>>> when I come to watch the HD recording the video is corrupt (lots of
>>> artifacts and frames bleeding into each other) until after the point I
>>> finished watching the SD recording.
>>> I was wondering if it was either the hard drive not being able to cope with
>>> the read/writes needed for an HD recording and an SD playback (SD recording
>>> while watching either HD or SD recording is fine) or if it is the file
>>> system I am using?
> That's the kind of behaviour the last time I tried using ext4 for recordings.
> After spending a day moving terabytes around to reinstate xfs as the
> big filesystem, those issues went away again.
>> I am running the system and recordings on the same drive
>> but two partitions both formatted to ext4 ..
> The Atom machines I have here can recording HD at the same time as playing
> back the same or a different HD (Ion2 -- VDPAU for playback), and are glitch free.
> They use a single drive, with ext4 for the main system and xfs for the recordings.

Perhaps it's the combination of ext4 and the Atom processor. I run ext4
for my OS and recording discs (one of each). I certainly at times
have 3 HD redordings plus one HD playback going simultaneously. That's
on my backend, which isn't also used as a frontend.


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