[FFmpeg-user] ffmpeg makes some sources darker

[Jim Worrall]

> On 2016 Jan 5, at 5:17 PM, Andy Furniss <adf.lists at gmail.com> wrote:
> I snipped some other "evidence" in my last post.
> 
> If you want to check outputs between the two ways look at the last
> lines of the larger block of x265 [info].
> 
> with ffmpeg the last 2 lines of both pass 1 and 2 are the same for me -
> 
> x265 [info]: tools: rd=3 psy-rd=0.30 signhide tmvp strong-intra-smoothing
> x265 [info]: tools: deblock sao
> 
> with x265-params they are different and refer to reading/writing stats.
> 
> x265 [info]: tools: rd=2 psy-rd=0.30 early-skip signhide tmvp fast-intra
> x265 [info]: tools: strong-intra-smoothing deblock sao stats-write
> 
> 
> x265 [info]: tools: rd=3 psy-rd=0.30 signhide tmvp strong-intra-smoothing
> x265 [info]: tools: deblock sao stats-read
> 

OK, something’s wrong with my setup then.  When I put pass into 
x265-params, I get the same thing in both passes, with stats-write
both times:

x265 [info]: tools: rd=2 psy-rd=0.30 early-skip signhide tmvp fast-intra
x265 [info]: tools: strong-intra-smoothing deblock stats-write

x265 [info]: tools: rd=2 psy-rd=0.30 early-skip signhide tmvp fast-intra
x265 [info]: tools: strong-intra-smoothing deblock stats-write

What could be going on?