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Autres articles (108)
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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 (...) -
Websites made with MediaSPIP
2 mai 2011, parThis page lists some websites based on MediaSPIP.
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Ajouter des informations spécifiques aux utilisateurs et autres modifications de comportement liées aux auteurs
12 avril 2011, parLa manière la plus simple d’ajouter des informations aux auteurs est d’installer le plugin Inscription3. Il permet également de modifier certains comportements liés aux utilisateurs (référez-vous à sa documentation pour plus d’informations).
Il est également possible d’ajouter des champs aux auteurs en installant les plugins champs extras 2 et Interface pour champs extras.
Sur d’autres sites (15097)
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ffmpeg vaapi and (video filter) equalizer
9 avril 2022, par Harvey KingI am trying to create a time-lapse video from a set of photos taken by a cheap webcam on my intel/linux machine.


I have figure out how to use vaapi and Intel's hardware acceleration to create such video clip.


The command I use is the following :


ffmpeg -hwaccel vaapi -hwaccel_output_format vaapi -vaapi_device /dev/dri/renderD128 -pattern_type glob -i '/picture/20220116/*.jpg' -c:v hevc_vaapi output.mp4



However, when I use h264_vaapi or hevc_vaapi, I can NOT attach (video) equalizer on top of it.


I am not trying to do anything fancy, just to tone down the gamma a bit, reduce saturation a bit, and increase contrast by a bit. For encoder such as libx264, I attach the following right before the "output.mp4" without any issue :


-vf eq=gamma=0.8:saturation=0.9:contrast=1.1



My questions are :


- 

- can video filter "equalizer" be used along with vaapi ?
- if yes, what am I missing ? I am keep getting the following error when I am trying to combine video filter equalizer and vaapi :








Impossible to convert between the formats supported by the filter 'Parsed_eq_0' and the filter 'auto_scaler_0'
Error reinitializing filters!
Failed to inject frame into filter network: Function not implemented
Error while processing the decoded data for stream #0:0





Thanks in advance


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avfilter : add audio dynamic equalizer filter
26 novembre 2021, par Paul B Mahol -
FFMPEG and MP3 : equalizer filter has no effect at all
2 mars 2021, par LeMartinPracticing FFMPEG filters on MP3s was great until I got stuck here with no luck reading from FFMPEG docs or around the web : equalizer filter has no effect at all on my MP3.


First I probed the file :


libavutil 56. 49.100 / 56. 49.100
 libavcodec 58. 89.100 / 58. 89.100
 libavformat 58. 43.100 / 58. 43.100
 libavdevice 58. 9.103 / 58. 9.103
 libavfilter 7. 83.100 / 7. 83.100
 libswscale 5. 6.101 / 5. 6.101
 libswresample 3. 6.100 / 3. 6.100
 libpostproc 55. 6.100 / 55. 6.100
Input #0, mp3, from '.\cierre.mp3':
 Metadata:
 major_brand : 3gp4
 minor_version : 0
 compatible_brands: isom3gp4
 com.android.version: 10
 encoder : Lavf58.43.100
 Duration: 00:00:14.92, start: 0.000000, bitrate: 64 kb/s
 Stream #0:0: Audio: mp3, 44100 Hz, mono, fltp, 64 kb/s



Then I triy different combinations, understanding this would increase frequency at 1KHZ by 20 DBs, but I hear no difference inbetween source and result :


.\ffmpeg -i .\cierre.mp3 -filter_complex equalizer=f=1000:g=20:c=1 -c:a libmp3lame equalized.mp3



Also if I ommit the (only ?) channel (because as per FFPROBE it is "MONO")


.\ffmpeg -i .\cierre.mp3 -filter_complex equalizer=f=1000:g=20:c=1 libmp3lame equalized.mp3



Is there anything to consider about the MP3 ? If I use VLC player's equalizer "1khz" is one of the frequencies. Other frequencies like 60HZ and 6000HZ do not show any impact either.


Thanks !