[FFmpeg-user] Fastest lossless codec and settings.

[Claudiu Rad]

On 1/5/2015 3:20 PM, Zsolt wrote:
> 2015-01-03 16:45 GMT+01:00 Peter B. <pb at das-werkstatt.com>:
>
>>
>> Which resolution are you planning to capture?
>>
>
> I was just trying to capture the whole desktop. (1920*1200)

that's HUGE for your CPU.
you either need a really fast CPU to encode that (even lossless), and/or 
really fast drives, the generated bitrate is huge especially in 
uncompressed form, possibly only SSDs will do in a sustained way (it 
also depends on your framerate of course).

maybe you should think about resizing this to something more manageable 
if your hardware is modest. 960x600 for example would be 1/4 of the 
bitrate in uncompressed and should be manageable by a HDD. maybe even 
lossless codecs will start to work.

i would experiment with the input scaling starting from something like 
480x300, increase from there and see at which point the bottlenecks 
start and why.
also the scaling may take some CPU, it may be interesting to measure 
that separately in order to find out what exactly happens.

bottom line, personally i think you either have to encode to lower 
resolution or change your hardware. but please post results if you find 
solutions.

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> -- 
> Claudiu