[mythtv-users] slow jump forward or back after 0.25 upgrade

[Dan Wilga]

On 10/1/12 10:08 PM, Michael T. Dean wrote:
> On 10/01/2012 09:28 PM, Roger Searle wrote:
>> Hi, following an upgrade to 0.25 (via a Mint 11 > 12 upgrade) last 
>> weekend, the main unresolved issue I have is that a skip/jump forward 
>> or back with the right or left arrow keys is painfully slow, each 
>> jump takes about 5 or 6 seconds to implement. It is pointless doing 6 
>> in quick succession as I could previously as only 1 or 2 of them 
>> would occur.  This is true both on a separate FE or watching on the 
>> BE itself.  Most of the time the onscreen indicator displaying 
>> elapsed time etc does not display either, however it will randomly, 
>> and when it does, it will sometimes (not always) skip forward at a 
>> more acceptable pace similar to on 0.24.
>>
>> The backend machine is otherwise running without issue as far as I 
>> know. While it's not a dedicated myth BE, there is nothing else of 
>> significance running on it when the FE has the above symptom, htop 
>> doesn't reveal any core running at high usage etc, it's a fairly 
>> recent quad core CPU, 8GB memory.
>>
>> Can anyone suggest where I could focus my attention to understand 
>> what's going on and resolve?
>
> Sounds like your seek tables are missing, so MythTV is actually having 
> to decode lots of video to find the right frame.
Either that, or your files are encoded using Matroska (mkv). I find 
seeking in mkv files to be far slower than mp4 or nuv, seek table or not.

-- 
Dan Wilga                                                        "Ook."