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Video d’abeille en portrait
14 mai 2011, par
Mis à jour : Février 2012
Langue : français
Type : Video
Autres articles (11)
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Qu’est ce qu’un éditorial
21 juin 2013, parEcrivez votre de point de vue dans un article. Celui-ci sera rangé dans une rubrique prévue à cet effet.
Un éditorial est un article de type texte uniquement. Il a pour objectif de ranger les points de vue dans une rubrique dédiée. Un seul éditorial est placé à la une en page d’accueil. Pour consulter les précédents, consultez la rubrique dédiée.
Vous pouvez personnaliser le formulaire de création d’un éditorial.
Formulaire de création d’un éditorial Dans le cas d’un document de type éditorial, les (...) -
Contribute to translation
13 avril 2011You can help us to improve the language used in the software interface to make MediaSPIP more accessible and user-friendly. You can also translate the interface into any language that allows it to spread to new linguistic communities.
To do this, we use the translation interface of SPIP where the all the language modules of MediaSPIP are available. Just subscribe to the mailing list and request further informantion on translation.
MediaSPIP is currently available in French and English (...) -
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 (...)
Sur d’autres sites (2443)
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ffmpeg : two videos side-by-side with audio1 lang=ger & audio2 lang=eng
19 janvier 2023, par miridigitalI have two videos from two GoPro cameras. Both videos are rendered via ffmpeg side-by-side into a single video (left and right) and the audio is currently combined/mixed into two channels (stereo). I can hear both camera audio channels at the same time.


Two channels stereo :


ffmpeg -i video1.mp4 -i video2.mp4 -filter_complex "[0:v][1:v]hstack=inputs=2[v]; [0:a][1:a]amerge[a]" -map "[v]" -map "[a]" -ac 2 side-by-side.mp4



audio from both videos mixed into a single file with 2 channels - mediainfo


Now I want to switch between the two audio channels (cam1 or cam2) while I'm playing the side-by-side video.


My first try : With four channels (without
-ac 2
parameter) :

ffmpeg -i video1.mp4 -i video2.mp4 -filter_complex "[0:v][1:v]hstack=inputs=2[v]; [0:a][1:a]amerge[a]" -map "[v]" -map "[a]" side-by-side.mp4



audio from both videos mixed into a single file with 4 channels - mediainfo


But the most video players can't easily select the channels 1+2 or 3+4 while playing.


So I tried two languages :


ffmpeg -i video1.mp4 -i video2.mp4 -filter_complex "[0:v][1:v]hstack=inputs=2[v]; [0:a][1:a]amerge[a]" -map "[v]" -map "[a]" -metadata:s:a:0 language=ger -metadata:s:a:1 language=eng side-by-side.mp4



audio from both videos mixed into a single file with 4 channels with languages - mediainfo


But that's wrong. I can only see german with 4 channels. How can I put channels 1+2 into german and channels 3+4 into english ? Afterwards I should be able to use the multi language feature from most video players to switch the audio between cameras.


Thank you,

Miriam

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Burning subtitles different resolutions
3 mai 2018, par FacundoI’m trying to create a live stream with three quality profiles with different resolutions (SD, HD and FullHD). The live stream has subtitles, and I have to burn them for compatibility reasons.
I know how to do it with one profile, but with many no idea.
ffmpeg -nostdin -loglevel error -hwaccel cuvid -deint 2 -drop_second_field 1 -surfaces 15 -c:v h264_cuvid -resize 1280x720 -y -i udp://xxx.xxx.xxx.xxx:xxxxx?pkt_size=1316\&buffer_size=409600\&fifo_size=1000000\&overrun_nonfatal=1 -filter_complex [i:0x2c6]hwdownload,format=nv12[base];[i:0x993]setpts=(2.5)/TB+PTS[subs];[subs]scale=1280:720[subtitle];[base][subtitle]overlay[v];[v]hwupload_cuda[v] -map [v] -c:v hevc_nvenc -preset llhq -rc vbr_hq -cq 23 -qp 23 -tier high -profile:v main10 -level 4.0 -b:v 2000k -maxrate 2400k -bufsize 1000k -map i:0x2bd -c:a libfdk_aac -ac 2 -b:a 64k -map i:0x2be -c:a libfdk_aac -ac 2 -b:a 64k -metadata:s:a:0 language=eng -metadata:s:a:1 language=spa -f mpegts -mpegts_flags resend_headers+pat_pmt_at_frames -mpegts_copyts 1 -pcr_period 40 udp://yyy.yyy.yyy.yyy:yyyy?ttl=31\?pkt_size=1316\&buffer_size=409600\&fifo_size=1000000\&overrun_nonfatal=1
Apparenlty, Iffmpeg doen’t allow to use -vf filter with filter_complex.
I’m using ffmpeg 3.4, cuda 8.
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Messages : Create messages_tj.js
14 janvier 2014, par 1darveshMessages : Create messages_tj.js
Added Tajik (Asia/Tajikistan) language
Closes gh-888