[mythtv-users] Is it worth upgrading AMD sempron 3000+ to sempron 3400+

Ben Edwards (lists) lists at videonetwork.org
Tue Aug 29 21:35:33 UTC 2006


I think I will go from my Sepeon 3000+ 128k L2 to a Anthon 64 3400 2G
L2. It is the ffmpeg that is taking the time (i.e. over 2 hours for a
film).  Below is the a chunk of the process.log.  Hopefully my upgrade
will drastically reduce this.

Ben

2006-08-29 17:52:39
************************************************************ *
2006-08-29 17:52:39 Processing file Glastonbury - 2006-07-15, 10-30
PM.mpg of ty pe recording
2006-08-29 17:52:39
************************************************************ *
2006-08-29 17:52:39 File type is 'mpegts'
2006-08-29 17:52:39 Video codec is 'mpeg2video'
2006-08-29 17:52:39 Running mythtranscode --mpeg2 to fix any errors
2006-08-29 17:59:30 File will be re-encoded using profile LP
2006-08-29 17:59:32 Preferred audio languages eng and eng
2006-08-29 17:59:32 Video id: 0x1e0, Audio1: [1] 0x1c0 (MP2, N/A),
Audio2: [-1] - 0x-1 (N/A, N/A)
2006-08-29 17:59:32 Aspect ratio is 16:9
2006-08-29 17:59:32 Re-encoding audio and video
2006-08-29 17:59:32 Encoding profile (LP) found
2006-08-29 17:59:32 ffmpeg -v 1 -i "/myth/temp/work/1/newfile.mpg" -r
pal -targe t dvd -b 2344 -s 352x576 -acodec ac3 -ab 192 -ac 2 -copyts
-aspect 16:9 "/myth/t emp/work/1/newfile2.mpg" -map 0:0 -map 0:1
2006-08-29 20:20:56 Preferred audio languages eng and eng
2006-08-29 20:20:56 Video id: 0x1e0, Audio1: [1] 0x80 (AC3, N/A),
Audio2: [-1] -  0x-1 (N/A, N/A)
2006-08-29 20:20:56 Splitting MPEG stream into audio and video parts
2006-08-29 20:20:56 Running: mythreplex --demux
-o /myth/temp/work/1/stream -v 224 -c 128
"/myth/temp/work/1/newfile2.mpg"
2006-08-29 20:27:47 Audio is already in ac3 format
2006-08-29 20:27:47 Extracting thumbnail image
from /myth/temp/work/1/stream.mv2  at position 0
2006-08-29 20:27:47 Destination file /myth/temp/work/1/thumbnail.jpg
2006-08-29 20:27:50
************************************************************ *
2006-08-29 20:27:50 Finished processing file Glastonbury - 2006-07-15,
10-30 PM. mpg
2006-08-29 20:27:50
************************************************************ *
2006-08-29 20:27:50
************************************************************ *
2006-08-29 20:27:50 Processing file Nashville - 2006-08-10, 11-00 PM.mpg
of type  recording
2006-08-29 20:27:50
************************************************************ *
2006-08-29 20:27:50 File type is 'mpegts'
2006-08-29 20:27:50 Video codec is 'mpeg2video'
2006-08-29 20:27:50 Running mythtranscode --mpeg2 to fix any errors
2006-08-29 20:36:19 File will be re-encoded using profile EP
2006-08-29 20:36:21 Preferred audio languages eng and eng
2006-08-29 20:36:21 Video id: 0x1e0, Audio1: [2] 0x1c0 (MP2, N/A),
Audio2: [-1] - 0x-1 (N/A, N/A)
2006-08-29 20:36:21 Aspect ratio is 16:9
2006-08-29 20:36:21 Re-encoding audio and video
2006-08-29 20:36:21 Encoding profile (EP) found
2006-08-29 20:36:21 ffmpeg -v 1 -i "/myth/temp/work/2/newfile.mpg" -r
pal -targe t dvd -b 1526 -s 352x288 -acodec ac3 -ab 128 -ac 2 -copyts
-aspect 16:9 "/myth/t emp/work/2/newfile2.mpg" -map 0:0 -map 0:2
2006-08-29 22:22:59 Preferred audio languages eng and eng
2006-08-29 22:22:59 Video id: 0x1e0, Audio1: [1] 0x80 (AC3, N/A),
Audio2: [-1] -  0x-1 (N/A, N/A)
2006-08-29 22:22:59 Splitting MPEG stream into audio and video parts
2006-08-29 22:22:59 Running: mythreplex --demux
-o /myth/temp/work/2/stream -v 224 -c 128
"/myth/temp/work/2/newfile2.mpg"
2006-08-29 22:27:30 Audio is already in ac3 format
2006-08-29 22:27:30 Extracting thumbnail image
from /myth/temp/work/2/stream.mv2  at position 0
2006-08-29 22:27:30 Destination file /myth/temp/work/2/thumbnail.jpg
2006-08-29 22:27:32
************************************************************ *
2006-08-29 22:27:32 Finished processing file Nashville - 2006-08-10,
11-00 PM.mp g
2006-08-29 22:27:32
************************************************************ *



On Tue, 2006-08-29 at 17:16 -0400, Michael T. Dean wrote:
> On 08/29/2006 10:56 AM, Steven Adeff wrote:
> > On 8/29/06, Kevin Hulse <jedi at mishnet.org> wrote:
> >   
> >>         My Athlon64 3500 runs at about 3:1. It takes 3 times as long
> >> as the runlength of a video in order to convert it from mpeg2 (DVD)
> >> to H.264.
> ...
> > I'd like to know why your transcoding from DVD to H.264? In order to
> > get similar quality at a significantly smaller bitrate your never
> > going to be able to play the H.264 file with out a DSP.
> >   
> 
> Unless he down-res's any high-resolution video to something his 
> processor can handle.
> 
> Still, though, I agree with your sentiment, Steve: there's not a lot of 
> file size benefit to H.264 (a.k.a. MPEG-4 AVC a.k.a. MPEG-4 Part 10) 
> compared to MPEG-4 Part 2 when you're also down-res'ing.  If you 
> down-res HDTV to SDTV resolutions (or you start out with SDTV 
> resolutions), MPEG-4 Part 2 can easily provide good quality at 1GiB/hr.  
> And, in the 1GiB/hr range, using 3-hours of processing time/1-hour 
> recording for space savings is a lot of unnecessary computing compared 
> to just buying a new 300GB HDD for $80 or so.  Since MPEG-4 Part 2 takes 
> just a bit more than half the bitrate of MPEG-2 and since H.264 was 
> designed to use half the bitrate of MPEG-2, you're really not getting 
> much space savings per SDTV-sized file.
> 
> And, when you factor in the relative immaturity of H.264, it seems the 
> best reason to use that CODEC (when you're not forced to by European 
> high-def standards ;), is just to play with the technology.  Now, for 
> OTA HDTV, it does have the benefit of saving bandwidth in the 
> already-too-limited available spectrum (where the spectrum is more 
> valuable than the processing time), so, IMHO, it makes far more sense 
> there than on a Myth box.
> 
> Mike
> 
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