E: Failed to fetch http://raspbian.raspberrypi.org/raspbian/pool/main/g/gst-plugins-base1.0/gir1.2-gst-plugins-base-1.0_1.14.4-2_armhf.deb  404  Not Found [IP: 93.93.128.193 80]
E: Failed to fetch http://raspbian.raspberrypi.org/raspbian/pool/main/g/gst-plugins-ugly1.0/gstreamer1.0-plugins-ugly_1.14.4-1_armhf.deb  404  Not Found [IP: 93.93.128.193 80]
E: Failed to fetch http://raspbian.raspberrypi.org/raspbian/pool/main/g/gst-plugins-base1.0/libgstreamer-plugins-base1.0-dev_1.14.4-2_armhf.deb  404  Not Found [IP: 93.93.128.193 80]
E: Failed to fetch http://raspbian.raspberrypi.org/raspbian/pool/main/g/gst-plugins-bad1.0/gir1.2-gst-plugins-bad-1.0_1.14.4-1+b1_armhf.deb  404  Not Found [IP: 93.93.128.193 80]
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
pi@raspberrypi:~ $ sudo apt-get update
Hit:1 http://archive.raspberrypi.org/debian buster InRelease
Get:2 http://raspbian.raspberrypi.org/raspbian buster InRelease [15.0 kB]
Reading package lists... Done        
E: Repository 'http://raspbian.raspberrypi.org/raspbian buster InRelease' changed its 'Suite' value from 'stable' to 'oldstable'
N: This must be accepted explicitly before updates for this repository can be applied. See apt-secure(8) manpage for details.
##</code><code>##

sudo apt-get install gstreamer1.0-plugins-ugly
sudo apt-get install gir1.2-gst-plugins-bad-1.0
sudo apt-get install gir1.2-gst-plugins-base-1.0
sudo apt-get install libgstreamer-plugins-base1.0-dev
##</code><code>##

checking for GST... no
configure: error: 
      You need to install or upgrade the GStreamer development
      packages on your system. On debian-based systems these are
      libgstreamer1.0-dev and libgstreamer-plugins-base1.0-dev.
      on RPM-based systems gstreamer1.0-devel, libgstreamer1.0-devel
      or similar. The minimum version required is 1.0.0.
  
configure failed
##</code><code>##

$ lsb_release -a
No LSB modules are available.
Distributor ID:	Raspbian
Description:	Raspbian GNU/Linux 10 (buster)
Release:	10
Codename:	buster
$ cat /etc/apt/sources.list 
deb http://raspbian.raspberrypi.org/raspbian/ buster main contrib non-free rpi
# Uncomment line below then 'apt-get update' to enable 'apt-get source'
#deb-src http://raspbian.raspberrypi.org/raspbian/ buster main contrib non-free rpi
$