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Autres articles (89)
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Modifier la date de publication
21 juin 2013, parComment changer la date de publication d’un média ?
Il faut au préalable rajouter un champ "Date de publication" dans le masque de formulaire adéquat :
Administrer > Configuration des masques de formulaires > Sélectionner "Un média"
Dans la rubrique "Champs à ajouter, cocher "Date de publication "
Cliquer en bas de la page sur Enregistrer -
Les autorisations surchargées par les plugins
27 avril 2010, parMediaspip core
autoriser_auteur_modifier() afin que les visiteurs soient capables de modifier leurs informations sur la page d’auteurs -
Publier sur MédiaSpip
13 juin 2013Puis-je poster des contenus à partir d’une tablette Ipad ?
Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir
Sur d’autres sites (13252)
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libsvtav1 : Fix the documentation to match the actual options
30 juillet 2020, par Mark Thompson -
Why does FFmpeg's xfade filter need the timebase and frame rate to match ? [closed]
19 juin, par Hashim AzizAs I discovered not long ago, and recently had to rediscover after trying to use it again,
xfade
- the crossfade filter that FFmpeg introduced in 2019 - requires that both inputs have a matching timebase (TBN) and frame rate (FPS).

This is "resolved" by explicitly making them the same, by adding
settb=AVTB
and a hardcoded FPS to both streams (there doesn't seem to be a constant equivalent toAVTB
for FPS) prior to usingxfade
:

-filter_complex \
[0:v]settb=AVTB,fps=29[v0];
[1:v]settb=AVTB,fps=29[v1];
[v0][v1]xfade=transition=fade:duration=$fadeduration:offset=$fadetime,format=yuv420p[faded]; 



However, I'm confused as to why is this necessary in the first place. The
concat
filter works similarly in that it requires all its inputs to have matching parameters, but this makes sense because the whole point ofconcat
is to avoid re-encoding. If thexfade
filter is (presumably) re-encoding anyway, why do the timebase and frame rate still need to match ?

Is there a reason the devs decided to enforce these limitations for the filter when they don't seem to be technically necessary ?


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avcodec/ituh263dec : Make the condition for the studio slice start code match between...
14 septembre 2019, par Michael Niedermayeravcodec/ituh263dec : Make the condition for the studio slice start code match between ff_h263_resync() and ff_mpeg4_decode_studio_slice_header()
If they mismatch an infinite loop can occur
Fixes : Timeout (infinite loop)
Fixes : 17043/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MPEG4_fuzzer-5695051748868096Found-by : continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>