Search found 69 matches

by Ajaja
Sun Aug 12, 2018 11:45 am
Forum: Usage
Topic: Crash on launch
Replies: 11
Views: 2336

Re: Crash on launch

ffmpeg-20180811-00ae349-win64-shared.zip doesn't work too :(
So, the problem is somewhere in x265, not in gcc8 (and not in x264 as I'd thought).
by Ajaja
Sat Aug 11, 2018 5:41 pm
Forum: Usage
Topic: Crash on launch
Replies: 11
Views: 2336

Crash on launch

On my PC all new win64 shared builds crash on launch.
Looks like the problem has appeared after an update of x264 library 20180118-7d0ff22 -> 20180806-303c484 .
The last working build was ffmpeg-20180808-90dc584-win64-shared.zip
Can someone confirm the issue?
by Ajaja
Fri Feb 14, 2014 7:12 pm
Forum: Suggestions
Topic: H.265 with x265
Replies: 12
Views: 20364

Re: H.265 with x265

Yes! Problem solved in latest ffmpegs commits. It still slow as hell (with veryslow preset), but quality is amaizing now. Medium preset with ABR gives little better PSNR than libx264's veryslow ABR at the same encoding speed.
by Ajaja
Fri Feb 14, 2014 6:52 pm
Forum: Suggestions
Topic: H.265 with x265
Replies: 12
Views: 20364

Re: H.265 with x265

Rebuilt from latest git. Something was changed. No more warnings. Testing PSNR...
by Ajaja
Fri Feb 14, 2014 5:48 pm
Forum: Suggestions
Topic: H.265 with x265
Replies: 12
Views: 20364

Re: H.265 with x265

Your first mistake was thinking you could output as anything other than raw HEVC. There is no muxing support yet. Furthermore, you're using the defaults, which means something like -crf 30. Use -x265-params crf=XX (where XX is the desired crf level). I tried raw hevc output and -x265-params crf=XX ...
by Ajaja
Thu Feb 13, 2014 5:43 pm
Forum: Suggestions
Topic: H.265 with x265
Replies: 12
Views: 20364

Re: H.265 with x265

Took few libx265 tests. Very bad quality with ffmpeg. Something wrong with I-frames. There are warnings: $ ./ffmpeg.exe -f lavfi -i mptestsrc -to 60 -c:v libx265 c1.mkv ffmpeg version 2.1.git Copyright (c) 2000-2014 the FFmpeg developers built on Feb 13 2014 19:30:46 with gcc 4.8.2 (x86_64-posix-seh...
by Ajaja
Tue Feb 04, 2014 9:45 am
Forum: Usage
Topic: How do you really set FFMPEG to do lossless H264?
Replies: 1
Views: 1982

Re: How do you really set FFMPEG to do lossless H264?

-qp 0 is lossless, -qp 1 is not lossless Size depends from source. Sometimes lossless can be smaller than -qp 1. For example, simple gray gradient: >ffmpeg -f lavfi -i color=black -s 640x480 -vf geq=r='(X+Y)/(H+W)*256':g='(X+Y)/(H+W)*256':b='(X+Y)/(H+W)*256' -frames 24 -pix_fmt yuv444p -c huffyuv -y...
by Ajaja
Mon Feb 03, 2014 8:56 pm
Forum: Compiling
Topic: Building ffmpeg with opencl
Replies: 20
Views: 15818

Re: Building ffmpeg with opencl

what if the OS/driver does not support opencl? ffmpeg.exe compilied with OpenCl library depend from OpenCL.dll. It will not run without drivers with OpenCL.dll. Also if I'm correct ffmpeg only supports deinterlacing with opencl right now, is taht correct? No. Deshake and unsharp filters only. And l...
by Ajaja
Sun Feb 02, 2014 8:51 pm
Forum: Compiling
Topic: Building ffmpeg with opencl
Replies: 20
Views: 15818

Re: Building ffmpeg with opencl

Thanks, so OpenCL has a generic ICD driver from Kronos which basically like a an interface which points to other installed drivers. Intel, Nvidia and ATI make their own OpenCL.so drivers. Does this mean that if I link it with intel's opencl.a (after converting the so) it won't work on a different s...
by Ajaja
Sun Feb 02, 2014 8:44 pm
Forum: Suggestions
Topic: Since FFMPEG 2 is there OpenCL Support
Replies: 21
Views: 26398

Re: Since FFMPEG 2 is there OpenCL Support

ramitbhalla wrote:Do you happen to have the x86 headers and library also?
Headers are the same. x86 library here. I did not test it with ffmpeg (because I build only x64 for myself), but it must work.
'