[mythtv-users] Downscale HD recordings with ffmpeg

[belcampo]

Ben Gladwell wrote:
>> My goal is "visibly the same quality" and "light on file-size".
>>
>> I use this:
>>
>> ffmpeg -i source.mpg -vcodec libx264 -b 2772k -flags +loop -coder 1  
>> -refs 2 -deblockalpha 0 -deblockbeta 0 -partitions +parti4x4 -partitions  
>> +partp8x8 -partitions +partb8x8 -partitions +parti8x8 -me_method umh  
>> -subq 7 -me_range 24 -cmp +chroma -bf 0 -b_strategy 1 -g 250 -keyint_min  
>> 25 -sc_threshold 40 -maxrate 4500k -r 25 -qmin 16 -qmax 32 -s 896x720  
>> -aspect 16:9 -acodec libfaac -ab 192k -ar 48000 -ac 6 -f mpegts result.ts
>>
>> ffmpeg doesn't produce 100% mpegts files, they don't play on an  
>> PopCornHour STB, I have to remux with tsMuxeR to get it 100%.
>>
>> Henk Schoneveld
> 
> I'm interested in ffmpeg and I think I've got the basics down.  How can
> I learn more about the options you pass to it above (like +loop -coder
> -refs etc)?  They're not in the man page and there's nothing about them
> in /usr/share/doc/ffmpeg.  Are these options being passed directly to
> the x264 encoder?
I got most from:
http://rob.opendot.cl/index.php/useful-stuff/x264-to-ffmpeg-option-mapping/
> 
> Thanks - Ben
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