[x265] Adaptove GoP sizes - not sure if its working

[Xinyue Lu]

Hi,

Thanks for the test result.

To test the previous behavior, pick a random version on dev branch
before r10850 should be good enough.

I haven't had some time to test through it, but, if with the latest
patch, it still produces I frames at 0, 250, 500 on my test video
clips, then that's unacceptable for me. There *are* real scene cuts,
and the encoder should prefer inserting I frames at scene cuts than
the max gop length.

--
Xinyue

On Tue, Oct 6, 2015 at 5:49 PM, Roshantha Mendis <hrm506 at york.ac.uk> wrote:
> Okay thanks, I understand the versioning now.
>
> But how do I checkout a specific version from the bitbucket repo ? e.g. If I
> want to checkout 1.7+400
>
>
>
> So I checked the latest version : x265 [info]: HEVC encoder version
> 1.7+512-f8b8ebdc5457
> And I tested against the test.mp4 you have given (I had to convert it to y4m
> first using ffmpeg, as x265 didn't recognise the format)
>
> the the I-frames were at (POC): 0, 250, 500.
>
> scenecut debug :
> x265 [debug]: scene cut at 108 Icost:319097 Pcost:305903 ratio:0.0413
> bias:0.2123 gop:108 (imb:1971 pmb:523)
> x265 [debug]: scene cut at 151 Icost:1324811 Pcost:1318306 ratio:0.0049
> bias:0.2692 gop:151 (imb:2470 pmb:24)
> x265 [debug]: scene cut at 302 Icost:1505570 Pcost:1489614 ratio:0.0106
> bias:0.1383 gop:52 (imb:2349 pmb:145)
> x265 [debug]: scene cut at 397 Icost:3199040 Pcost:3189918 ratio:0.0029
> bias:0.2639 gop:147 (imb:2344 pmb:150)
>