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Autres articles (10)
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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.
You may also (...) -
Les formats acceptés
28 janvier 2010, parLes commandes suivantes permettent d’avoir des informations sur les formats et codecs gérés par l’installation local de ffmpeg :
ffmpeg -codecs ffmpeg -formats
Les format videos acceptés en entrée
Cette liste est non exhaustive, elle met en exergue les principaux formats utilisés : h264 : H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 m4v : raw MPEG-4 video format flv : Flash Video (FLV) / Sorenson Spark / Sorenson H.263 Theora wmv :
Les formats vidéos de sortie possibles
Dans un premier temps on (...) -
Les vidéos
21 avril 2011, parComme les documents de type "audio", Mediaspip affiche dans la mesure du possible les vidéos grâce à la balise html5 .
Un des inconvénients de cette balise est qu’elle n’est pas reconnue correctement par certains navigateurs (Internet Explorer pour ne pas le nommer) et que chaque navigateur ne gère en natif que certains formats de vidéos.
Son avantage principal quant à lui est de bénéficier de la prise en charge native de vidéos dans les navigateur et donc de se passer de l’utilisation de Flash et (...)
Sur d’autres sites (5648)
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ffmpeg combine existing filter_complex with upscaleto e.g. 720p
24 novembre 2019, par Tom MeyerCurrently I am combining two videos using this filter :
-filter_complex "[1:v][0:v]scale2ref=main_w:ih[sec][pri]; [sec]setsar=1,drawbox=c=black:t=fill[sec];[pri][sec]hstack[canvas]; [canvas][1:v]overlay=main_w-overlay_w"
The output is the following : test.png (Green is the first video input, orange the second one) The whole video (red) has a format of 1600x540 (That might change depending on the input sizes.)
My question is whether there is a way to upscale this video to maybe 1920x1080 or 1280x720 in the same command. By upscaling I mean to change its size and to fittingly insert black bars on the side/top.
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FFMpeg - How to add a diagonal watermark text to a video
5 février 2016, par ramWith the following command i am able to add a horizontal text to the video.
ffmpeg -re -i ./input.mp4 -vf "drawtext="fontsize=15:fontfile=FreeSerif.ttf:text="WATERMARK TEXT":y=h/2:x=50:fontcolor=green:fontsize=40"" -f mp4 ./output.mp4
Will it be possible for me to add the text diagonally to a video using drawtext filter ? what is the best way to add a diagonal text to a video using ffmpeg ?
Purpose is to add diagonal water mark text to the video
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How do I use ffmpeg to create an audio-synced cut from a single file ?
1er octobre 2017, par AlaShibanI have 1 large file (lets call it test.mp4), and I’d like to create a new file (out.mp4) that takes 3 segments that are 1 second apart :
Seg1: 00:01:00 - 00:02:00
Seg2: 00:03:00 - 00:04:00
Seg3: 00:06:00 - 00:07:00And merge them into out.mp4
I’ve tried various concat filters, or using the textfile.txt with instructions in it :
file file-1.wav
duration 20.0But various methods produce glitchy video with the x264 codec (green artifacts, choppy out-of-sync audio)
Cutting each segment into its own file and then merging is not applicable because that approach would produce thousands of files and seems quite slow processing wise.
Does anyone have thoughts on how this can be done properly with ffmpeg ? Is there an alternative API/CLI tool I could use thats known to work better for these cases ?