Dear,

I tested the "ffmpeg command" in NanoPi Fire 3(S5p6818). In lubutu firmware, ffmpeg works
but doen't work in friendlycore-arm64 firmware, and I put the testing steps that described below.


#### 1st testing ###################################################
[ubuntu16.04 PC]
$ git clone https://github.com/friendlyarm/sd-fuse_s5p6818
$ cd sd-fuse_s5p6818
$ sudo fusing.sh /dev/sda lubuntu
-----------
copy from: ./lubuntu to /dev/sda
[RAW. 0]: 21 KB | ./lubuntu/bl1-mmcboot.bin > 100% : done.
[RAW. 1]: 272 KB | ./lubuntu/fip-loader.img > 100% : done.
[RAW. 2]: 251 KB | ./lubuntu/fip-secure.img > 100% : done.
[RAW. 3]: 464 KB | ./lubuntu/fip-nonsecure.img > 100% : done.
[MBR. 0]: 26732 KB | ./lubuntu/boot.img > 100% : done.
[MBR. 1]: 4202565 KB | ./lubuntu/rootfs.img > 100% : done.
[MBR. 2]: 5752 KB | ./lubuntu/userdata.img > 100% : done.
----------------------------------------------------------------
/dev/sda: msdos partitions 1 2 3
### try to resize2fs: /dev/sda3
resize2fs 1.42.13 (17-May-2015)
Resizing the filesystem on /dev/sda3 to 6713344 (4k) blocks.
The filesystem on /dev/sda3 is now 6713344 (4k) blocks long.
---------------------------------
Lubuntu is fused successfully.
All done.

[NanoPi Fire3]
After booting and login with 'root'.
root@FriendlyELEC:~# sudo apt-get install ffmpeg
root@FriendlyELEC:~# ffmpeg -version
ffmpeg version 2.8.15-0ubuntu0.16.04.1 Copyright (c) 2000-2018 the FFmpeg developers
built with gcc 5.4.0 (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.10) 20160609
configuration: --prefix=/usr --extra-version=0ubuntu0.16.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/arm-linux-gnueabihf --incdir=/usr/include/arm-linux-gnueabihf --cv
libavutil 54. 31.100 / 54. 31.100
libavcodec 56. 60.100 / 56. 60.100
libavformat 56. 40.101 / 56. 40.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 40.101 / 5. 40.101
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.101 / 1. 2.101
libpostproc 53. 3.100 / 53. 3.100
root@FriendlyELEC:~#


#### 2nd testing ###################################################
[ubuntu16.04 PC]
$ git clone https://github.com/friendlyarm/sd-fuse_s5p6818
$ cd sd-fuse_s5p6818
$ sudo fusing.sh /dev/sda friendlycore-arm64

[NanoPi Fire3]
After booting and login with 'pi'

NanoPi-Fire3 login: pi (automatic login)
-----------------
Welcome to Ubuntu 16.04.6 LTS 4.4.172-s5p6818
System load: 0.46 Up time: 16 sec
Memory usage: 5 % of 954Mb IP:
CPU temp: 39�°C
Usage of /: 8% of 27G
----------------
pi@NanoPi-Fire3:~$ ll
total 172528
drwxr-xr-x 1 pi pi 4096 Feb 11 16:28 ./
drwxr-xr-x 1 root root 4096 Sep 17 2019 ../
-rw-r--r-- 1 pi pi 220 Aug 31 23:29 .bash_logout
-rw-r--r-- 1 pi pi 3771 Aug 31 23:29 .bashrc
drwx------ 2 pi pi 4096 Feb 11 16:28 .cache/
-rw-r--r-- 1 pi pi 675 Aug 31 23:29 .profile
drwxr-xr-x 3 pi pi 4096 Nov 26 2019 .virtualenvs/
-rw-r--r-- 1 pi pi 176637831 Sep 17 2019 demo.mp4
pi@NanoPi-Fire3:~$ ffmpeg
ffmpeg: symbol lookup error: /usr/lib/aarch64-linux-gnu/libopencv_core.so.2.4: undefined symbol: glXGetProcAddressARB
pi@NanoPi-Fire3:~$