[mythtv-users] Commercial Detection during recording

[Michael T. Dean]

On 03/11/2013 01:47 PM, Joseph Fry wrote:
> If so, I wonder if it wouldn't be worthwhile for a patch to adjust the 
> commercial detection job priority to always favor realtime comflagging.

This presumes that I/O is the biggest resource usage of commercial 
detection.  In fact, it's usually CPU usage (for all-software decode of 
the video) that's the biggest resource usage, and I/O is a negligible 
load in comparison.  This is true when recording high-bitrate, 
high-resolution MPEG-2 (such as ATSC) and much more so when recording 
high-bitrate, high resolution AVC/H.264.  This is also true when 
decoding low-bitrate, low resolution (SDTV) MPEG-2 or MPEG-4 with 
"Auto-commercial-detection jobs when recording starts" enabled, because 
then you're simply decoding a 1hr show in 1hr.

Mike