[mythtv-users] Playing Myth recordings on Blackberry Playbook

Chris Kapp chris.kapp at gmail.com
Mon Jan 16 14:03:40 UTC 2012


On Sun, Jan 15, 2012 at 5:29 PM, Michelle Dupuis <mdupuis at ocg.ca> wrote:
> My recordings are from satellite, through an HDPVR, which I thought uses
> H.264
>
>
> ________________________________
> From: mythtv-users-bounces at mythtv.org [mythtv-users-bounces at mythtv.org] On
> Behalf Of Richard Morton [richard.e.morton at gmail.com]
> Sent: Sunday, January 15, 2012 10:46 AM
>
> To: Myth TV Users List
> Subject: Re: [mythtv-users] Playing Myth recordings on Blackberry Playbook
>
> Hi,
>
> I am guessing you are using an ATSC
> (http://en.wikipedia.org/wiki/ATSC) tuner which is not something I know well
> as we use DVB in the UK.
>
> however ATSC works similarly to DVB in that there is a tuner that tunes to a
> frequency and picks up a multiplex. A multiplex contains multiple tv
> channels (all broadcast on the same frequency). software then picks out the
> relevant channel from that multiplex for recording (and if you are using
> multi-rec, then 2 or more channels maybe picked out for recording).
>
> the tv channel is already encoded using something like mpeg2 or h264 for the
> video and mp2, mp3 or aac for the audio. the combination of the video and
> audio is put into a stream. streams over the air have different limitations
> so they are encoded slightly differently and use a transport stream rather
> than the typical program stream used for desktop files of videos
> (http://en.wikipedia.org/wiki/MPEG_transport_stream)
>
> So... your files are being recorded as mpg files containing h.264 video and
> aac audio, both of which the playbook (depending on the resolution of the
> files) should be able to play. The reality is that tablets and phones are
> _very_ fussy about what they will play. In order to create a micro-processor
> that can decode h.264 while remaining low power they make many assumptions
> and you must ensure that the video you pass the chip (tablet) meets these
> assumptions.
>
> There are tools for this, but you are limited to either...
>  - on the fly transcoding - you need a beefy computer for this - look at
> mediatomb
>  - re-encoding all your files to a suitable format for both your TV and
> tablet... I wouldnt do this as the tablet will probably do 720i but your TV
> will likely do 1080p, so you'd be reducing quality for your main tv, but
> this would likely work for standard definition tv. look at tablet-encode, or
> the various transcode scripts on this list that have been discussed
> recently. Remeber to update your mythtv seek table for any recording files
> you modify and replace.
>  - re-encode selectively and populate your tablet using rss feeds. have a
> look at mythpodcaster
>
> sorry there isnt a one-size fits all answer, nor is there a satisfactory (my
> personal view) "in-the-skin" mythtv solution... but I hear it maybe improved
> in 0.25...
>
> Hope that helps
>
> R
>
>
>
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>

Hi.
Here is a PDF that tells the video types the playbook supports.
http://docs.blackberry.com/en/smartphone_users/deliverables/27267/Supported_Media_Types_on_BlackBerry_Tablets_(English).pdf

I too have been trying to play the recordings from the HD PVR without
success.  However, recordings that I have converted for my iPod do
work.

Chris.


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