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• Can't install new packages in ubuntu

  7 juin 2023, par Robbie Mallett

  I would like to install ffmpeg. My normal procedure to install this package would be :

  


  sudo apt update
sudo apt install ffmpeg


  


  However when I run sudo apt update I get some errors including :

  


    The following signatures were invalid: EXPKEYSIG 277A7293F59E4889 MiKTeX Packager <packager@miktex.org>
Reading package lists... Done
E: The repository 'http://security.ubuntu.com/ubuntu impish-security Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://gb.archive.ubuntu.com/ubuntu impish Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://repository.spotify.com stable InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 7A3A762FAFD4A51F
E: The repository 'http://gb.archive.ubuntu.com/ubuntu impish-updates Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://gb.archive.ubuntu.com/ubuntu impish-backports Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://ctan.dcc.uchile.cl/systems/win32/miktex/setup/deb focal InRelease: The following signatures were invalid: EXPKEYSIG 277A7293F59E4889 MiKTeX Packager <packager@miktex.org>


  


  And then when I run sudo apt install ffmpeg and selecting Y to some options, I get :

  


  (base) robbie@ro-rmallett-l1:~$ sudo apt install ffmpeg
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following package was automatically installed and is no longer required:
  libfwupdplugin1
Use 'sudo apt autoremove' to remove it.
The following additional packages will be installed:
  libavdevice58 libdc1394-25 libopenal-data libopenal1 libsdl2-2.0-0
Suggested packages:
  ffmpeg-doc libportaudio2
The following NEW packages will be installed
  ffmpeg libavdevice58 libdc1394-25 libopenal-data libopenal1 libsdl2-2.0-0
0 to upgrade, 6 to newly install, 0 to remove and 19 not to upgrade.
Need to get 3,046 kB of archives.
After this operation, 5,642 kB of additional disk space will be used.
Do you want to continue? [Y/n] Y
WARNING: The following packages cannot be authenticated!
  libdc1394-25 libopenal-data libopenal1 libsdl2-2.0-0 libavdevice58 ffmpeg
Install these packages without verification? [y/N] Y
Err:1 http://gb.archive.ubuntu.com/ubuntu impish/universe amd64 libdc1394-25 amd64 2.2.6-3
  404  Not Found [IP: 185.125.190.36 80]
Ign:2 http://gb.archive.ubuntu.com/ubuntu impish/universe amd64 libopenal-data all 1:1.19.1-2
Err:3 http://gb.archive.ubuntu.com/ubuntu impish/universe amd64 libopenal1 amd64 1:1.19.1-2
  404  Not Found [IP: 185.125.190.36 80]
Ign:4 http://gb.archive.ubuntu.com/ubuntu impish-updates/main amd64 libsdl2-2.0-0 amd64 2.0.14+dfsg2-3ubuntu0.1
Ign:5 http://gb.archive.ubuntu.com/ubuntu impish-updates/universe amd64 libavdevice58 amd64 7:4.4.2-0ubuntu0.21.10.1
Ign:6 http://gb.archive.ubuntu.com/ubuntu impish-updates/universe amd64 ffmpeg amd64 7:4.4.2-0ubuntu0.21.10.1
Err:2 http://gb.archive.ubuntu.com/ubuntu impish/universe amd64 libopenal-data all 1:1.19.1-2
  404  Not Found [IP: 185.125.190.36 80]
Err:4 http://security.ubuntu.com/ubuntu impish-updates/main amd64 libsdl2-2.0-0 amd64 2.0.14+dfsg2-3ubuntu0.1
  404  Not Found [IP: 185.125.190.36 80]
Err:5 http://security.ubuntu.com/ubuntu impish-updates/universe amd64 libavdevice58 amd64 7:4.4.2-0ubuntu0.21.10.1
  404  Not Found [IP: 185.125.190.36 80]
Err:6 http://security.ubuntu.com/ubuntu impish-updates/universe amd64 ffmpeg amd64 7:4.4.2-0ubuntu0.21.10.1
  404  Not Found [IP: 185.125.190.36 80]
E: Failed to fetch http://gb.archive.ubuntu.com/ubuntu/pool/universe/libd/libdc1394/libdc1394-25_2.2.6-3_amd64.deb  404  Not Found [IP: 185.125.190.36 80]
E: Failed to fetch http://gb.archive.ubuntu.com/ubuntu/pool/universe/o/openal-soft/libopenal-data_1.19.1-2_all.deb  404  Not Found [IP: 185.125.190.36 80]
E: Failed to fetch http://gb.archive.ubuntu.com/ubuntu/pool/universe/o/openal-soft/libopenal1_1.19.1-2_amd64.deb  404  Not Found [IP: 185.125.190.36 80]
E: Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/libs/libsdl2/libsdl2-2.0-0_2.0.14%2bdfsg2-3ubuntu0.1_amd64.deb  404  Not Found [IP: 185.125.190.36 80]
E: Failed to fetch http://security.ubuntu.com/ubuntu/pool/universe/f/ffmpeg/libavdevice58_4.4.2-0ubuntu0.21.10.1_amd64.deb  404  Not Found [IP: 185.125.190.36 80]
E: Failed to fetch http://security.ubuntu.com/ubuntu/pool/universe/f/ffmpeg/ffmpeg_4.4.2-0ubuntu0.21.10.1_amd64.deb  404  Not Found [IP: 185.125.190.36 80]
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?


  


  When I use --fix-missing after either call it doesn't help. To be honest I can't understand the error messages. I'm running Ubuntu 21.10. What should I do ? I can't seem to install any new packages with apt-get.

  


• Sites qui peuvent inspirer

  26 septembre 2013

  Pour des nouveaux thèmes, voir pour faire évoluer le squelette, il est toujours intéressant de regarder les sites qui font pareil. Ici, deux liens vers des catalogues OpenData

  Liens de severo :

  • généraliste : http://demo.ckan.org/ ;
  • données spatiales : http://beta.dev.geonode.org/ ;
  • http://www.documentcloud.org/public/search/

  Liens de kent1 :

  • Site de tutoriaux vidéos : https://tutsplus.com
  • Un thème wordpress utilisé notamment ici ;
  • Autre thème wordpress utilisé ici ;

• Controlling ffmpeg at runtime with zmq

  3 avril 2023, par Gavin

  I want to dynamically change the rectilinear view (eg its yaw) of a 360 video as it plays.

  


  basic command

  


  To take a 360 video and show a flat/normal view at a yaw perspective of 60 degrees

  


  ffmpeg -i input360.mp4 -vf "v360=input=e:rectilinear:yaw=60,scale=iw/4:-1" out60.mp4
This works fine.

  


  Changing the yaw during playback

  


  I understand ffmpeg has two methods to change filter params at runtime ; sendcmd (file based) and zmq (message based)

  


  I got sendcmd method working, but am struggling to understand zmq syntax and use. ffmpeg's zmq docs are pretty sparse.
I am using a local Windows 10 PC

  


  sendcmd

  


  ffplay -i input360.mp4 -vf "sendcmd=f=cmd.txt,v360=input=e:rectilinear:reset_rot=1,scale=iw/4:-1"

  


  with a cmd.txt file

  


  0-5 [expr] v360 yaw 'lerp(0,90,TI)';
5-10 [expr] v360 yaw 'lerp(90,0,TI)';


  


  result : yaw changes from 0 to 90 degrees from t=0-5s and then 90 to 0 degrees from t=5-10s. Perfect

  


  zmq

  


  ffplay -i input360.mp4 -vf "v360=input=e:rectilinear:reset_rot=1,zmq,scale=iw/4:-1"

  


  I got zmqsend from ffmpeg-tools.zip and added to my ffmpeg bin directory

  


  


  1. execute above ffplay command from terminal window #1 - and see video playing

     


  


  2. Open terminal window #2 and execute : echo v360 yaw 90 > zmqsend

     


  


  


  result : no change to video yaw. No errors either

  


  What am I doing wrong ? Im not sure if my ffmpeg command is wrong, or if my zmq message does not reach ffmpeg (or both). I checked my ffmpeg v2022-10-10 config has —enable-libzmq