[mythtv-users] What CPU for HLS transcode performance
mythtv-list at dinkum.org.uk
Thu Sep 6 11:10:59 UTC 2012
On 5 Sep 2012, at 18:32, Chris Pinkham wrote:
> * On Wed Sep 05, 2012 at 01:40:51PM +0100, Andre wrote:
>> The desktop PC has an i7-860 clocked at 2.93Ghz and although only two
>> cores are used and it looks like it's turbo boosting clock it's still
>> not enough to get the job done. I'm considering upgrading the backend
> You should see at least 3 threads running normally when doing a HLS
> transcode. The decoding is done in one thread and the code is set to
> default to using 2 threads in libx264 for encoding.
> If you run something like the following SQL command on your database,
> it will bump up the number of threads used for encoding to 4.
> INSERT settings (value, data, hostname)
> VALUES ('HTTPLiveStreamThreads', '4', 'YOURBACKENDHOSTNAME');
Ok, now seeing 390 to 430% for mythtranscode and >30fps at 720p 4500kbps on the i7-860, so no pauses and moderately clean video, nice.
I'm hearing some audio gaps but that's another thing.
> I'll probably make this a setting as part of some other work I'm currently
> doing on the HLS encoder.
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