- About The FFmpeg version: Check this thread http://www.ffmpeg-archive.org/ffmpeg-and-webm-format-and-mkv-format-td467752.... It's because you installed a develop version instead of a release one. You can check the FFmpeg version date of "N-85203-g400378b" by typing inside FFmpeg repository (https://github.com/FFmpeg/FFmpeg) git log 400378b - About libx264: You decide to include libx264 at compilation step. In which OS are you trying to install it ? If you are a linux user and you are in a mood for compiling you can follow this thread: https://trac.ffmpeg.org/wiki/How%20to%20quickly%20compile%20FFmpeg%20with%20...) to enable libx264 aldo On 7 May 2017 at 10:03, negin tebyani <negin.tebyani@gmail.com> wrote:

I have two systems that I am running ffmpeg on them. when I use the ffmpeg -version command, the versions are so different. this is the first system's ffmpeg version:

ffmpeg version N-85203-g400378b

and this is for the second system:

ffmpeg version 2.8.11

I tried to install 2.8.11 version on the first one. but still no result. how can I fix this? i need to use x264opts. it works on second system. but the first system does not include libx264 on the encoders list. so it can not find the opts options. _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user

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