[mythtv-users] Cannot max out CPU usage on HLS transcode

John Pilkington J.Pilk at tesco.net
Tue Oct 16 15:16:03 UTC 2012


On 16/10/12 15:44, John Pilkington wrote:
> On 16/10/12 15:14, Jim Downie wrote:
>>> Not really, but can I ask what speeds you are getting? I recently
>>> converted a 1080i recording from dvb-t2 to dvd format within
>>> mytharchive, which uses ffmpeg. The transcoding step on my laptop took
>>> about 6* real time. You have 3* cores and around 2* speed; do you get
>>> much faster than real time?
>>
>> What was your ffmpeg command line parameters and I will try it on one
>> of my dvb-t2 recordings?

mythffmpeg -threads 2 -v 1 -i 
"/home/john/Mythrecs/1054_20121010222600.mpg" -r pal -target dvd -b 
4771k -s 720x576 -acodec ac3 -ab 192k -ac 2 -copyts -aspect 16:9 
"/mnt/MythOnRoot/Mytharch_work/work/1/newfile2.mpg" -acodec ac3 -ab 192k 
-ac 2 -newaudio -map 0:0 -map 0:1 -map 0:2


I just noticed that I cut the log just before this line, which may 
answer your original question.

[h264 @ 0x8f5e470] Cannot parallelize deblocking type 1, decoding such 
frames in sequential order
frame=   21 fps=  0 q=2.0 size=     124kB time=0.19 
bitrate=5290.7kbits/s dup=20 drop=0
frame=   25 fps= 23 q=2.0 size=     124kB time=0.19 
bitrate=5290.7kbits/s dup=21 drop=0
frame=   29 fps= 17 q=3.0 size=     180kB time=0.42 
bitrate=3544.6kbits/s dup=21 drop=0

etc.



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