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Autres articles (68)
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Le profil des utilisateurs
12 avril 2011, parChaque utilisateur dispose d’une page de profil lui permettant de modifier ses informations personnelle. Dans le menu de haut de page par défaut, un élément de menu est automatiquement créé à l’initialisation de MediaSPIP, visible uniquement si le visiteur est identifié sur le site.
L’utilisateur a accès à la modification de profil depuis sa page auteur, un lien dans la navigation "Modifier votre profil" est (...) -
Configurer la prise en compte des langues
15 novembre 2010, parAccéder à la configuration et ajouter des langues prises en compte
Afin de configurer la prise en compte de nouvelles langues, il est nécessaire de se rendre dans la partie "Administrer" du site.
De là, dans le menu de navigation, vous pouvez accéder à une partie "Gestion des langues" permettant d’activer la prise en compte de nouvelles langues.
Chaque nouvelle langue ajoutée reste désactivable tant qu’aucun objet n’est créé dans cette langue. Dans ce cas, elle devient grisée dans la configuration et (...) -
XMP PHP
13 mai 2011, parDixit Wikipedia, XMP signifie :
Extensible Metadata Platform ou XMP est un format de métadonnées basé sur XML utilisé dans les applications PDF, de photographie et de graphisme. Il a été lancé par Adobe Systems en avril 2001 en étant intégré à la version 5.0 d’Adobe Acrobat.
Étant basé sur XML, il gère un ensemble de tags dynamiques pour l’utilisation dans le cadre du Web sémantique.
XMP permet d’enregistrer sous forme d’un document XML des informations relatives à un fichier : titre, auteur, historique (...)
Sur d’autres sites (7195)
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Paperclip with heroku and paperclip, migration fails
2 décembre 2013, par jdartlandI have a created ruby on rails application and I'm using paperclip to handle my file uploads.
Paperclip works just fine on my local machine. But my video upload stops working when I deploy to Heroku. Does anyone know whats going wrong. I also get an error when I try to upload a video which says that the video filename does not exist. The photo upload works but not the Video, I'm using paperclip iwth nested attributes and ffmpeg.Upload Error log :
Paperclip::Error (Asset model missing required attr_accessor for 'video_file_name')
2013-12-02T14:38:16.867747+00:00 app[web.1]: Paperclip::Error (Asset model missing required attr_accessor for 'video_file_name'):
2013-12-02T14:38:16.867747+00:00 app[web.1]: app/controllers/projects_controller.rb:60:in `block in update'
2013-12-02T14:38:16.867747+00:00 app[web.1]: app/controllers/projects_controller.rb:59:in `update'Here is my migration error :
Migrating to AddAttachmentPhotoToAssets (20131021134721)
== AddAttachmentPhotoToAssets: migrating =====================================
-- change_table(:assets)
-> 0.0273s
== AddAttachmentPhotoToAssets: migrated (0.0276s) ============================
Migrating to AddProjectIdToAssets (20131022082744)
-- add_column(:assets, :project_id, :integer)
PG::DuplicateColumn: ERROR: column "project_id" of relation "assets" already exists
: ALTER TABLE "assets" ADD COLUMN "project_id" integer
-- add_column(:assets, :project_id, :integer)
PG::DuplicateColumn: ERROR: column "project_id" of relation "assets" already exists
: ALTER TABLE "assets" ADD COLUMN "project_id" integer
rake aborted!
PG::DuplicateColumn: ERROR: column "project_id" of relation "assets" already exists
: ALTER TABLE "assets" ADD COLUMN "project_id" integer
/app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/connection_adapters/postgresql/database_statements.rb:128:in `exec'
/app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/connection_adapters/postgresql/database_statements.rb:128:in `block in execute'
/app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/connection_adapters/abstract_adapter.rb:425:in `block in log'
/app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
/app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/connection_adapters/abstract_adapter.rb:420:in `log'
/app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/connection_adapters/postgresql/database_statements.rb:127:in `execute'
/app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/connection_adapters/abstract/schema_statements.rb:360:in `add_column'
/app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/connection_adapters/postgresql/schema_statements.rb:379:in `add_column'
/app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/migration.rb:625:in `block in method_missing'
/app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/migration.rb:597:in `block in say_with_time'
/app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/migration.rb:597:in `say_with_time'
/app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/migration.rb:617:in `method_missing'
/app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/migration.rb:383:in `method_missing'
/app/db/migrate/20131022082744_add_project_id_to_assets.rb:2:in `'
/app/db/migrate/20131022082744_add_project_id_to_assets.rb:1:in `<top>'
/app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `require'
/app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `block in require'
/app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:213:in `load_dependency'
/app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `require'
/app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/migration.rb:718:in `load_migration'
/app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/migration.rb:714:in `migration'
/app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/migration.rb:708:in `disable_ddl_transaction'
/app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/migration.rb:1012:in `use_transaction?'
/app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/migration.rb:922:in `rescue in block in migrate'
/app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/migration.rb:919:in `block in migrate'
/app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/migration.rb:916:in `each'
/app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/migration.rb:916:in `migrate'
/app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/migration.rb:764:in `up'
/app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/migration.rb:742:in `migrate'
/app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/railties/databases.rake:42:in `block (2 levels) in <top>'
Tasks: TOP => db:migrate
(See full trace by running task with --trace)
</top></top>Here is my table :
create_table "assets", force: true do |t|
t.datetime "created_at"
t.datetime "updated_at"
t.string "photo_file_name"
t.string "photo_content_type"
t.integer "photo_file_size"
t.datetime "photo_updated_at"
t.integer "project_id"
t.string "video_file_name"
t.string "video_content_type"
t.integer "video_file_size"
t.datetime "video_updated_at"
end
add_index "projects", ["permalink"], name: "index_projects_on_permalink", using: :btree
create_table "settings", force: true do |t|
t.string "title"
t.text "description"
t.text "paragraph"
t.datetime "created_at"
t.datetime "updated_at"
t.string "photo_file_name"
t.string "photo_content_type"
t.integer "photo_file_size"
t.datetime "photo_updated_at"
t.string "video_file_name"
t.string "video_content_type"
t.integer "video_file_size"
t.datetime "video_updated_at"
endWould gladly need some help ! :)
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Transcode video using celery and ffmpeg in django
28 octobre 2015, par RobinI would like to transcode user uploaded videos using celery. I think first I should upload the video, and spawn a celery task for transcoding.
Maybe something like this in the tasks.py :
subprocess.call('ffmpeg -i path/.../original path/.../output')Just completed First steps with celery, so confused how to do so in the
views.pyandtasks.py. Also is it a good solution ? I would really appreciate your help and advice. Thank you.models.py :
class Video(models.Model):
user = models.ForeignKey(User)
title = models.CharField(max_length=100)
original = models.FileField(upload_to=get_upload_file_name)
mp4_480 = models.FileField(upload_to=get_upload_file_name, blank=True, null=True)
mp4_720 = models.FileField(upload_to=get_upload_file_name, blank=True, null=True)
privacy = models.CharField(max_length=1,choices=PRIVACY, default='F')
pub_date = models.DateTimeField(auto_now_add=True, auto_now=False)my incomplete views.py :
@login_required
def upload_video(request):
if request.method == 'POST':
form = VideoForm(request.POST, request.FILES)
if form.is_valid():
if form.cleaned_data:
user = request.user
#
#
# No IDEA WHAT TO DO NEXT
#
#
return HttpResponseRedirect('/')
else:
form = VideoForm()
return render(request, 'upload_video.html', {
'form':form
}) -
cv2/ffmpeg "grabFrame packet read max attempts exceeded" error after exactly reading certain number of frames
26 juin, par banjaxingI am using OpenCV to extract frames from videos, run a segmentation AI model, and save the frames and masks to a folder. When I run my code to extract the frame from I encounter the error "grabFrame packet read max attempts exceeded" after processing a certain number of frames. This issue occurs consistently for the same videos across multiple environments.


Error message :


[ WARN:0@379.898] global cap_ffmpeg_impl.hpp:1541 grabFrame packet read max attempts exceeded, if your video have multiple streams (video, audio) try to increase attempt limit by setting environment variable OPENCV_FFMPEG_READ_ATTEMPTS (current value is 10000)


Minimum Reproducible Example


import os
import cv2

videofilename = "test.mp4"
capture = cv2.VideoCapture(videofilename)
frameNum = 0

createfolder = os.getcwd() + '/' + videofilename.split(".")[0] + '/'
if not os.path.exists(createfolder):
 os.makedirs(createfolder)
 os.makedirs(createfolder + "/frames/")

while True:
 success, frame = capture.read()
 if success is False:
 break
 frameNum += 1
 framedownloadname = videofilename.split(".")[0] + '-fr' + str(frameNum) + '.jpg'
 framedownloadloc = createfolder + '/frames/' + framedownloadname
 print(framedownloadloc)
 cv2.imwrite(framedownloadloc, frame)
 img = cv2.imread(framedownloadloc)
 img = cv2.cvtColor(img, cv2.COLOR_BGR2RGB)

capture.release()


As suggested in error, I increased the OPENCV_FFMPEG_READ_ATTEMPTS env variable up to 10000. However, this seems to have little to no effect on the number of frames before the error appears.


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