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Autres articles (48)
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Dépôt de média et thèmes par FTP
31 mai 2013, parL’outil MédiaSPIP traite aussi les média transférés par la voie FTP. Si vous préférez déposer par cette voie, récupérez les identifiants d’accès vers votre site MédiaSPIP et utilisez votre client FTP favori.
Vous trouverez dès le départ les dossiers suivants dans votre espace FTP : config/ : dossier de configuration du site IMG/ : dossier des média déjà traités et en ligne sur le site local/ : répertoire cache du site web themes/ : les thèmes ou les feuilles de style personnalisées tmp/ : dossier de travail (...) -
Personnaliser les catégories
21 juin 2013, parFormulaire de création d’une catégorie
Pour ceux qui connaissent bien SPIP, une catégorie peut être assimilée à une rubrique.
Dans le cas d’un document de type catégorie, les champs proposés par défaut sont : Texte
On peut modifier ce formulaire dans la partie :
Administration > Configuration des masques de formulaire.
Dans le cas d’un document de type média, les champs non affichés par défaut sont : Descriptif rapide
Par ailleurs, c’est dans cette partie configuration qu’on peut indiquer le (...) -
Selection of projects using MediaSPIP
2 mai 2011, parThe examples below are representative elements of MediaSPIP specific uses for specific projects.
MediaSPIP farm @ Infini
The non profit organizationInfini develops hospitality activities, internet access point, training, realizing innovative projects in the field of information and communication technologies and Communication, and hosting of websites. It plays a unique and prominent role in the Brest (France) area, at the national level, among the half-dozen such association. Its members (...)
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Revision eec3def7c5 : Modified no memory rate control. This 2-pass rate control setting allocates bit
16 octobre 2013, par Paul WilkinsChanged Paths :
Modify /vp9/encoder/vp9_onyx_if.c
Modify /vp9/encoder/vp9_onyx_int.h
Modify /vp9/encoder/vp9_ratectrl.c
Modified no memory rate control.This 2-pass rate control setting allocates bits based
on first pass stats to each kf group, gf group and individual
frame but does not correct the bits left and allocation after
each frame.In other words it recommends a bit allocation for each frame
but does not try and correct any over or under spend on a
frame over the remainder of the clip. This reduces the accuracy
of rate control in terms of hitting an average bitrate but prevents
problems that may arise because early frames either use to many
or too few bits. This mode is currently more inclined to undershoot
than overshoot (particularly at higher data rates).Also minor changes to rate of adaption when recode loop is not
enabled.This mode is currently enabled by default for VBR.
It gives the following % performance gains.derf +0.467, +1.072
yt 2.962, 2.645
stdhd 1.682, 1.595,
yt-hd 2.3, 2.174Change-Id : I3c84a9bf8884e5b345698ff0e19187f792c2f3a0
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Ffmpeg gdigrab records black window when capturing graphics-intensive flight simulator
23 mars 2021, par iterI am trying to capture video from XPlane, a popular flight simulator. I'm running on Windows.



Normally, I can capture individual windows using
gdigrab
, but when I use it on an XPlane window like so...


ffmpeg -f gdigrab -framerate 30 -i "X-System" -b:v 300K capture.mp4




...I get a video file that's the right dimensions but is all black. I imagine this may have something to do with how XPlane talks directly to the GPU. I should add that if I capture the entire desktop like so...



ffmpeg -f gdigrab -framerate 30 -i desktop -b:v 300K capture.mp4




...I get everything including the simulator window, but naturally with unrelated windows in the capture, including windows sitting on top of the simulator window.



Is there a way for
gdigrab
to capture video this GPU-intensive window alone ? Is there a different tool I can use ?

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gstreamer vaapih264enc generated ts segment dont play on AVPlayer
21 juin 2022, par Guru GovindanI have a pipeline that transcodes an rtsp stream into hls segments. The manifest is playable in browsers(with hlsjs) and ffplay and VLC. However when I play the stream or individual ts segments in Quicktime player or my IOS App that uses avplayer, it doesnt work.


This seems to be an issue only with
vaapih264enc
. When I try the same with software encode likex264enc
it works fine.

The following is a simple pipeline where this is reproducible.


GST_DEBUG=3 gst-launch-1.0 rtspsrc location='rtsp://user:pass@10.10.10.12:554/' name=rtpsrc0 \
 rtpsrc0. ! rtph264depay ! queue ! decodebin ! vaapih264enc ! mpegtsmux name=mux ! filesink location=mymux.ts \
 rtpsrc0. ! decodebin ! queue ! fdkaacenc ! mux.



when I run the following command to copy the encoded stream as is from the generated ts segment it works


ffmpeg -i mymux.ts -c copy mymux_ffmpeg.ts



Is the ffmpeg adding some additional header information that the quicktime player is happy with ?


I appreciate any help with this.