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Autres articles (35)
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Configuration spécifique d’Apache
4 février 2011, parModules spécifiques
Pour la configuration d’Apache, il est conseillé d’activer certains modules non spécifiques à MediaSPIP, mais permettant d’améliorer les performances : mod_deflate et mod_headers pour compresser automatiquement via Apache les pages. Cf ce tutoriel ; mode_expires pour gérer correctement l’expiration des hits. Cf ce tutoriel ;
Il est également conseillé d’ajouter la prise en charge par apache du mime-type pour les fichiers WebM comme indiqué dans ce tutoriel.
Création d’un (...) -
HTML5 audio and video support
13 avril 2011, parMediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
For older browsers the Flowplayer flash fallback is used.
MediaSPIP allows for media playback on major mobile platforms with the above (...) -
De l’upload à la vidéo finale [version standalone]
31 janvier 2010, parLe chemin d’un document audio ou vidéo dans SPIPMotion est divisé en trois étapes distinctes.
Upload et récupération d’informations de la vidéo source
Dans un premier temps, il est nécessaire de créer un article SPIP et de lui joindre le document vidéo "source".
Au moment où ce document est joint à l’article, deux actions supplémentaires au comportement normal sont exécutées : La récupération des informations techniques des flux audio et video du fichier ; La génération d’une vignette : extraction d’une (...)
Sur d’autres sites (3358)
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Revision 6ef805eb9d : Change ref frame coding. Code intra/inter, then comp/single, then the ref frame
6 juin 2013, par Ronald S. BultjeChanged Paths :
Modify /vp9/common/vp9_blockd.h
Modify /vp9/common/vp9_entropymode.c
Modify /vp9/common/vp9_findnearmv.c
Modify /vp9/common/vp9_findnearmv.h
Modify /vp9/common/vp9_implicit_segmentation.c
Modify /vp9/common/vp9_loopfilter.c
Modify /vp9/common/vp9_mvref_common.c
Modify /vp9/common/vp9_onyxc_int.h
Modify /vp9/common/vp9_pred_common.c
Modify /vp9/common/vp9_pred_common.h
Modify /vp9/common/vp9_reconinter.c
Modify /vp9/decoder/vp9_decodemv.c
Modify /vp9/decoder/vp9_decodframe.c
Modify /vp9/decoder/vp9_detokenize.c
Modify /vp9/encoder/vp9_bitstream.c
Modify /vp9/encoder/vp9_encodeframe.c
Modify /vp9/encoder/vp9_encodeintra.c
Modify /vp9/encoder/vp9_encodemb.c
Modify /vp9/encoder/vp9_encodemv.c
Modify /vp9/encoder/vp9_firstpass.c
Modify /vp9/encoder/vp9_onyx_if.c
Modify /vp9/encoder/vp9_onyx_int.h
Modify /vp9/encoder/vp9_ratectrl.c
Modify /vp9/encoder/vp9_rdopt.c
Modify /vp9/encoder/vp9_tokenize.c
Change ref frame coding.Code intra/inter, then comp/single, then the ref frame selection.
Use contextualization for all steps. Don't code two past frames
in comp pred mode.Change-Id : I4639a78cd5cccb283023265dbcc07898c3e7cf95
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avcodec/smacker : Use unsigned for prediction values
26 juin 2020, par Andreas Rheinhardtavcodec/smacker : Use unsigned for prediction values
Up until now, the Smacker decoder has pretended that the prediction
values are signed in code like 'pred[0] += (unsigned)sign_extend(val, 16)'
(the cast has been added to this code later to fix undefined behaviour).
This has been even done in case the PCM format is u8.Yet in case of 8/16 bit samples, only the lower 8/16 bit of the predicition
values are ever used, so one can just as well just use unsigned and
remove the sign extensions. This is what this commit does.For GCC 9 the time for one call to smka_decode_frame() for the sample from
ticket #2425 decreased from 1709043 to 1693619 decicycles ; for Clang 9
it went up from 1355273 to 1369089 decicycles.Reviewed-by : Paul B Mahol <onemda@gmail.com>
Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com> -
Why does hard-coding subtitles into MKV cause resulting video length to be wildly incorrect ?
21 mai 2018, par BudJBI am trying to encode an existing MKV with a video, audio, and several subtitle streams, such that video encodes with H264, audio encodes with AAC, and the second subtitle track is hard-coded into the video stream. I am using the myffmpeg GUI frontend, but can view and modify the ffmpeg command before it’s run.
Every time that I run the encode, the MKV reports that the duration is 1195 hours and change, where it’s supposed to be around 2 hours, plus some change. If I encode without the hard-coded subtitles, things turn out alright.
Here’s the command that’s run, with the latest ffmpeg :
ffmpeg.exe -probesize 50M -analyzeduration 100M -i "D:\Video\in.mkv" -c:a aac -ac 6 -strict -2 -async 1 -c:v libx264 -crf 20 -r 24000/1001 -s 1920x1080 -aspect 16:9 -pix_fmt yuv420p -preset fast -partitions default -b-pyramid 1 -weightb 1 -8x8dct 1 -fast-pskip 0 -direct-pred 1 -coder ac -trellis 1 -me_method hex -subq 6 -me_range 16 -bf 3 -b_strategy 1 -refs 3 -flags +loop -sws_flags fast_bilinear -sc_threshold 40 -keyint_min 24 -g 48 -qmin 3 -qmax 51 -qdiff 4 -filter_complex "[0:v][0:s:2]overlay[out]" -map [out] -map 0:a:0 -sn -y "D:\Video\out.mkv"
I’ve tried a couple other MKV’s with the same results. Anyone else run into this or know what’s going on ?