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Pas question de marché, de cloud etc...
10 avril 2011Le vocabulaire utilisé sur ce site essaie d’éviter toute référence à la mode qui fleurit allègrement
sur le web 2.0 et dans les entreprises qui en vivent.
Vous êtes donc invité à bannir l’utilisation des termes "Brand", "Cloud", "Marché" etc...
Notre motivation est avant tout de créer un outil simple, accessible à pour tout le monde, favorisant
le partage de créations sur Internet et permettant aux auteurs de garder une autonomie optimale.
Aucun "contrat Gold ou Premium" n’est donc prévu, aucun (...) -
Des sites réalisés avec MediaSPIP
2 mai 2011, parCette page présente quelques-uns des sites fonctionnant sous MediaSPIP.
Vous pouvez bien entendu ajouter le votre grâce au formulaire en bas de page. -
Submit bugs and patches
13 avril 2011Unfortunately a software is never perfect.
If you think you have found a bug, report it using our ticket system. Please to help us to fix it by providing the following information : the browser you are using, including the exact version as precise an explanation as possible of the problem if possible, the steps taken resulting in the problem a link to the site / page in question
If you think you have solved the bug, fill in a ticket and attach to it a corrective patch.
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Sur d’autres sites (9390)
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FFMPEG crop boundaries animation
28 septembre 2021, par VlFedotovI'm looking for a way to make crop filter params depends on current time.


Now I have 2 videos - white and aqua squares in one split output video, and this code works fine :


ffmpeg -i out/i1.mp4 -i out/i2.mp4 -filter_complex "[0:v]crop=iw/2:ih:0:0[left];[1:v]crop=iw/2:ih:ow:0[right];[left][right]hstack" out/generated.mp4



My question is - how to make the border between two videos floating, animated ? For example from left side of output vide to the right ?


I already tried to use t param, e.g. like this :


ffmpeg -i out/i1.mp4 -i out/i2.mp4 -filter_complex "[0:v]crop=iw/2+t:ih:0:0[left];[1:v]crop=iw/2-t:ih:ow:0[right];[left][right]hstack" out/generated.mp4



But it throws an error :


[Parsed_crop_0 @ 0x7fa46060eec0] Error when evaluating the expression 'iw/2+t'

[Parsed_crop_0 @ 0x7fa46060eec0] Failed to configure input pad on Parsed_crop_0

Error reinitializing filters!

Failed to inject frame into filter network: Invalid argument

Error while processing the decoded data for stream #1:0



Can anybody help me to solve this ? Or explain - why it isn't possible ?


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Using squish(x) to fade in/out text
15 mars 2023, par Alessandro U. VirettaI would like to use the squish() function to fade in/out text by using
alpha=squish(t-3)
to fade the text out andalpha=1-squish(t-3)
to fade it in.

Fading out works well :


ffplay -f lavfi -i color=#dddddd:s=640x480 -vf "drawtext='text=TEST:x=(w-text_w)/2:y=(h-text_h)/2:fontsize=200:alpha=squish(t-3)'"



but fading in does not work at all :


ffplay -f lavfi -i color=#dddddd:s=640x480 -vf "drawtext='text=TEST:x=(w-text_w)/2:y=(h-text_h)/2:fontsize=200:alpha=1-squish(t-3)'"



Am I missing anything or is it a bug ?


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ffmpeg combine video streams into 1x4 collage
24 décembre 2016, par vyazikovCan anyone please help understand how to make correct
-filter_complex
expression inffmpeg
to join 4 RTSP streams in a row collage 1x4 ?
The complexity is that there is ONE input with 4 video streams inside.
ffprobe
output :Input #0, rtsp, from 'rtsp://MyStream':
Metadata:
title : h264.sdp
Duration: N/A, start: 0.024944, bitrate: N/A
Stream #0:0: Video: h264 (Baseline), yuv420p, 640x480, 27.92 tbr, 90k tbn, 180k tbc
Stream #0:1: Video: h264 (Baseline), yuv420p, 640x480, 27.92 tbr, 90k tbn, 180k tbc
Stream #0:2: Video: h264 (Baseline), yuv420p, 640x480, 27.92 tbr, 90k tbn, 180k tbc
Stream #0:3: Video: h264 (Baseline), yuv420p, 640x480, 27.92 tbr, 90k tbn, 180k tbc