由于 Debian 中未满足的依赖关系，无法重新安装 ffmpeg/为什么 ffmpeg 没有在视频转换中使用指定的比特率？

简而言之：我试图重新安装 ffmpeg sudo apt install ffmpeg::

Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 ffmpeg : Depends: libavcodec58 (= 7:4.1.6-1~deb10u1)
          Depends: libavdevice58 (= 7:4.1.6-1~deb10u1) but 7:4.3.1-6~bpo10+1 is to be installed
          Depends: libavfilter7 (= 7:4.1.6-1~deb10u1)
          [...]
E: Unable to correct problems, you have held broken packages.`

如何解决那些缺少的依赖项？

完整问题：

当我运行时ffmpeg -i "./input.mp4" -vcodec libvpx-vp9 -acodec libvorbis -b:v 9M "./output.webm"，结果没有 9MB 的比特率，而是一个小得多的比特率，即使我尝试使用的输入视频的比特率正好是 9MB 或更大。
我对发生这种情况的原因很感兴趣，除了使用之外没有任何帮助来解决这个问题-crf。有了这个，我可以通过反复试验使输出文件的比特率与输入文件的比特率相匹配。此问题可能与以下问题有关，也可能无关。也许我应该为它创建一个单独的问题。

由于上述问题，我尝试重新安装 ffmpeg。看起来我从Basil Gello 的 Kodi 存储库安装了 ffmpeg （Debian 主存储库中的 Kodi 版本非常过时）。起初，我试图通过去除回购和重新安装运行在主库的ffmpegsudo apt-get update && sudo apt-get --reinstall install ffmpeg由我：Reinstallation of ffmpeg is not possible, it cannot be downloaded.让我再次跑补充说，回购：sudo apt-get --reinstall install ffmpeg/buster-backports。这是输出：

Reading package lists... Done
Building dependency tree       
Reading state information... Done
Selected version '7:4.3.1-6~bpo10+1' (kodi-nightly-debian-repo:1.0/stable-backports [amd64]) for 'ffmpeg'
Selected version '7:4.3.1-6~bpo10+1' (kodi-nightly-debian-repo:1.0/stable-backports [amd64]) for 'libavcodec58' because of 'ffmpeg'
Selected version '7:4.3.1-6~bpo10+1' (kodi-nightly-debian-repo:1.0/stable-backports [amd64]) for 'libavutil56' because of 'libavcodec58'
Selected version '7:4.3.1-6~bpo10+1' (kodi-nightly-debian-repo:1.0/stable-backports [amd64]) for 'libswresample3' because of 'libavcodec58'
Selected version '7:4.3.1-6~bpo10+1' (kodi-nightly-debian-repo:1.0/stable-backports [amd64]) for 'libavdevice58' because of 'ffmpeg'
Selected version '7:4.3.1-6~bpo10+1' (kodi-nightly-debian-repo:1.0/stable-backports [amd64]) for 'libavfilter7' because of 'libavdevice58'
Selected version '7:4.3.1-6~bpo10+1' (kodi-nightly-debian-repo:1.0/stable-backports [amd64]) for 'libavformat58' because of 'libavfilter7'
Selected version '7:4.3.1-6~bpo10+1' (kodi-nightly-debian-repo:1.0/stable-backports [amd64]) for 'libpostproc55' because of 'libavfilter7'
Selected version '7:4.3.1-6~bpo10+1' (kodi-nightly-debian-repo:1.0/stable-backports [amd64]) for 'libswscale5' because of 'libavfilter7'
Selected version '7:4.3.1-6~bpo10+1' (kodi-nightly-debian-repo:1.0/stable-backports [amd64]) for 'libavresample4' because of 'ffmpeg'
The following packages were automatically installed and are no longer required:
  i965-va-driver:i386 intel-media-va-driver:i386 libgomp1:i386 libigdgmm5:i386 libsoxr0:i386 libva-drm2:i386 libva-x11-2:i386 libva2:i386
  libvdpau-va-gl1:i386 libvdpau1:i386 mesa-va-drivers:i386 mesa-vdpau-drivers:i386 ocl-icd-libopencl1:i386 va-driver-all:i386 vdpau-driver-all:i386
Use 'sudo apt autoremove' to remove them.
The following additional packages will be installed:
  libavcodec58 libavdevice58 libavfilter7 libavformat58 libavresample4 libavutil56 libpostproc55 libswresample3 libswscale5
Suggested packages:
  ffmpeg-doc
The following packages will be REMOVED:
  libavcodec-dev libavfilter-dev libavformat-dev libavresample-dev libavutil-dev libavutil56:i386 libpostproc-dev libswresample-dev libswresample3:i386
  libswscale-dev
The following packages will be upgraded:
  ffmpeg libavcodec58 libavdevice58 libavfilter7 libavformat58 libavresample4 libavutil56 libpostproc55 libswresample3 libswscale5
10 upgraded, 0 newly installed, 10 to remove and 0 not upgraded.
Need to get 9,752 kB of archives.
After this operation, 39.0 MB disk space will be freed.
Do you want to continue? [Y/n] y
Get:1 https://basilgello.github.io/kodi-nightly-debian-repo buster-backports/main amd64 ffmpeg amd64 7:4.3.1-6~bpo10+1 [1,584 kB]
Get:2 https://basilgello.github.io/kodi-nightly-debian-repo buster-backports/main amd64 libavdevice58 amd64 7:4.3.1-6~bpo10+1 [114 kB]
Get:3 https://basilgello.github.io/kodi-nightly-debian-repo buster-backports/main amd64 libavfilter7 amd64 7:4.3.1-6~bpo10+1 [1,281 kB]
Get:4 https://basilgello.github.io/kodi-nightly-debian-repo buster-backports/main amd64 libswscale5 amd64 7:4.3.1-6~bpo10+1 [195 kB]
Get:5 https://basilgello.github.io/kodi-nightly-debian-repo buster-backports/main amd64 libavformat58 amd64 7:4.3.1-6~bpo10+1 [1,037 kB]
Get:6 https://basilgello.github.io/kodi-nightly-debian-repo buster-backports/main amd64 libavcodec58 amd64 7:4.3.1-6~bpo10+1 [4,942 kB]
Get:7 https://basilgello.github.io/kodi-nightly-debian-repo buster-backports/main amd64 libswresample3 amd64 7:4.3.1-6~bpo10+1 [95.0 kB]                  
Get:8 https://basilgello.github.io/kodi-nightly-debian-repo buster-backports/main amd64 libpostproc55 amd64 7:4.3.1-6~bpo10+1 [91.0 kB]                   
Get:9 https://basilgello.github.io/kodi-nightly-debian-repo buster-backports/main amd64 libavresample4 amd64 7:4.3.1-6~bpo10+1 [92.0 kB]                  
Get:10 https://basilgello.github.io/kodi-nightly-debian-repo buster-backports/main amd64 libavutil56 amd64 7:4.3.1-6~bpo10+1 [320 kB]                     
Fetched 9,752 kB in 8s (1,242 kB/s)                                                                                                                       
Reading changelogs... Done
apt-listchanges: Do you want to continue? [Y/n] y
apt-listchanges: Mailing root: apt-listchanges: changelogs for hostname(Reading database ... 427402 files and directories currently installed.)
Removing libavfilter-dev:amd64 (7:4.3.1-5.1~bpo10+1) ...
Removing libavformat-dev:amd64 (7:4.3.1-5.1~bpo10+1) ...
Removing libavcodec-dev:amd64 (7:4.3.1-5.1~bpo10+1) ...
Removing libavresample-dev:amd64 (7:4.3.1-5.1~bpo10+1) ...
Removing libswscale-dev:amd64 (7:4.3.1-5.1~bpo10+1) ...
Removing libswresample-dev:amd64 (7:4.3.1-5.1~bpo10+1) ...
Removing libswresample3:i386 (7:4.3.1-5.1~bpo10+1) ...
Removing libavutil56:i386 (7:4.3.1-5.1~bpo10+1) ...
Removing libpostproc-dev:amd64 (7:4.3.1-5.1~bpo10+1) ...
Removing libavutil-dev:amd64 (7:4.3.1-5.1~bpo10+1) ...
(Reading database ... 427211 files and directories currently installed.)
Preparing to unpack .../0-ffmpeg_7%3a4.3.1-6~bpo10+1_amd64.deb ...
Unpacking ffmpeg (7:4.3.1-6~bpo10+1) over (7:4.3.1-5.1~bpo10+1) ...
Preparing to unpack .../1-libavdevice58_7%3a4.3.1-6~bpo10+1_amd64.deb ...
Unpacking libavdevice58:amd64 (7:4.3.1-6~bpo10+1) over (7:4.3.1-5.1~bpo10+1) ...
Preparing to unpack .../2-libavfilter7_7%3a4.3.1-6~bpo10+1_amd64.deb ...
Unpacking libavfilter7:amd64 (7:4.3.1-6~bpo10+1) over (7:4.3.1-5.1~bpo10+1) ...
Preparing to unpack .../3-libswscale5_7%3a4.3.1-6~bpo10+1_amd64.deb ...
Unpacking libswscale5:amd64 (7:4.3.1-6~bpo10+1) over (7:4.3.1-5.1~bpo10+1) ...
Preparing to unpack .../4-libavformat58_7%3a4.3.1-6~bpo10+1_amd64.deb ...
Unpacking libavformat58:amd64 (7:4.3.1-6~bpo10+1) over (7:4.3.1-5.1~bpo10+1) ...
Preparing to unpack .../5-libavcodec58_7%3a4.3.1-6~bpo10+1_amd64.deb ...
Unpacking libavcodec58:amd64 (7:4.3.1-6~bpo10+1) over (7:4.3.1-5.1~bpo10+1) ...
Preparing to unpack .../6-libswresample3_7%3a4.3.1-6~bpo10+1_amd64.deb ...
Unpacking libswresample3:amd64 (7:4.3.1-6~bpo10+1) over (7:4.3.1-5.1~bpo10+1) ...
Preparing to unpack .../7-libpostproc55_7%3a4.3.1-6~bpo10+1_amd64.deb ...
Unpacking libpostproc55:amd64 (7:4.3.1-6~bpo10+1) over (7:4.3.1-5.1~bpo10+1) ...
Preparing to unpack .../8-libavresample4_7%3a4.3.1-6~bpo10+1_amd64.deb ...
Unpacking libavresample4:amd64 (7:4.3.1-6~bpo10+1) over (7:4.3.1-5.1~bpo10+1) ...
Preparing to unpack .../9-libavutil56_7%3a4.3.1-6~bpo10+1_amd64.deb ...
Unpacking libavutil56:amd64 (7:4.3.1-6~bpo10+1) over (7:4.3.1-5.1~bpo10+1) ...
Setting up libavutil56:amd64 (7:4.3.1-6~bpo10+1) ...
Setting up libpostproc55:amd64 (7:4.3.1-6~bpo10+1) ...
Setting up libswscale5:amd64 (7:4.3.1-6~bpo10+1) ...
Setting up libswresample3:amd64 (7:4.3.1-6~bpo10+1) ...
Setting up libavresample4:amd64 (7:4.3.1-6~bpo10+1) ...
Setting up libavcodec58:amd64 (7:4.3.1-6~bpo10+1) ...
Setting up libavformat58:amd64 (7:4.3.1-6~bpo10+1) ...
Setting up libavfilter7:amd64 (7:4.3.1-6~bpo10+1) ...
Setting up libavdevice58:amd64 (7:4.3.1-6~bpo10+1) ...
Setting up ffmpeg (7:4.3.1-6~bpo10+1) ...
Processing triggers for man-db (2.8.5-2) ...
Processing triggers for libc-bin (2.28-10) ...
[ Rootkit Hunter version 1.4.6 ]
File updated: searched for 181 files, found 146
Scanning processes...                                                                                                                                      
Scanning candidates...                                                                                                                                     
Scanning processor microcode...                                                                                                                            
Scanning linux images...                                                                                                                                   

Running kernel seems to be up-to-date.

The processor microcode seems to be up-to-date.

No services need to be restarted.

No containers need to be restarted.

User sessions running outdated binaries: [...]

现在sudo apt install ffmpeg总是的输出是：

Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 ffmpeg : Depends: libavcodec58 (= 7:4.1.6-1~deb10u1)
          Depends: libavdevice58 (= 7:4.1.6-1~deb10u1) but 7:4.3.1-6~bpo10+1 is to be installed
          Depends: libavfilter7 (= 7:4.1.6-1~deb10u1)
          Depends: libavformat58 (= 7:4.1.6-1~deb10u1) but 7:4.3.1-6~bpo10+1 is to be installed
          Depends: libavresample4 (= 7:4.1.6-1~deb10u1) but 7:4.3.1-6~bpo10+1 is to be installed
          Depends: libavutil56 (= 7:4.1.6-1~deb10u1) but 7:4.3.1-6~bpo10+1 is to be installed
          Depends: libpostproc55 (= 7:4.1.6-1~deb10u1) but 7:4.3.1-6~bpo10+1 is to be installed
          Depends: libswresample3 (= 7:4.1.6-1~deb10u1) but 7:4.3.1-6~bpo10+1 is to be installed
          Depends: libswscale5 (= 7:4.1.6-1~deb10u1) but 7:4.3.1-6~bpo10+1 is to be installed
E: Unable to correct problems, you have held broken packages.

如何解决那些缺少的依赖项？我不能只是重新安装那些，许多其他核心包都依赖于这些。

我也试过运行sudo apt-get clean ; sudo apt-get update ; sudo apt-get check ; sudo apt-get purge ffmpeg* -y ; sudo apt-get autoremove -y ; sudo apt-get -f satisfy ffmpeg -y 这并没有解决问题。

我正在使用 KDE 运行 Debian 10。任何帮助表示赞赏。