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Autres articles (50)
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Les autorisations surchargées par les plugins
27 avril 2010, parMediaspip core
autoriser_auteur_modifier() afin que les visiteurs soient capables de modifier leurs informations sur la page d’auteurs -
La sauvegarde automatique de canaux SPIP
1er avril 2010, parDans le cadre de la mise en place d’une plateforme ouverte, il est important pour les hébergeurs de pouvoir disposer de sauvegardes assez régulières pour parer à tout problème éventuel.
Pour réaliser cette tâche on se base sur deux plugins SPIP : Saveauto qui permet une sauvegarde régulière de la base de donnée sous la forme d’un dump mysql (utilisable dans phpmyadmin) mes_fichiers_2 qui permet de réaliser une archive au format zip des données importantes du site (les documents, les éléments (...) -
Use, discuss, criticize
13 avril 2011, parTalk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
A discussion list is available for all exchanges between users.
Sur d’autres sites (8804)
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Fast green screen video processing on android device
17 mars 2015, par Si-NI have written an app in iOS that takes two video sources, one with moving character on a green screen and any other video. The program then uses the GPUImage framework to add a chroma key shader via OpenGL ES 2 and then merges each frame (so the bottom frame now shows where the green pixels are) and outputs to a new video file. This happens very quickly, faster than real time.
I have now been tasked with porting the app to Android. I thought it would be fairly straightforward. After doing some research I think I am wrong. There is an Android port of GPUImage but it does not handle video at the moment. I have done some research and come up with a very basic idea.
I was wondering if you think this approach is feasible :
Convert one video file to match resolution and type of other video using ffmpeg or JavaCV wrappers.
Read frame by frame of each video using ffmpeg as MediaMetadataRetriever is very slow and convert into some RGB format. Use shader to apply chroma key effect so both frames are merged.
Use ffmpeg to output result to a new file.
This sounds slow, but if it sounds feasible I will try it out. I am not at all sure about making sure the 2 video resolutions / bitrate etc match. One video will be fixed at 1280 * 720 and the other video source will come from the camera on the device so will be variable. Also I think ffmpeg means using NDK which is a whole world of pain I wanted to avoid.
I have a headache thinking about it. Any advice would be greatly appreciated.
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using clang compile ffmpeg with too much warning on osx
12 juin 2014, par arachideI use clang to compile ffmpeg, It reports too much warn
./libavutil/arm/intmath.h:102:40: warning: value size does not match register size specified by the constraint and modifier
[-Wasm-operand-widths]
./libavutil/arm/intmath.h:102:40: warning: value size does not match register size specified by the constraint and modifier
[-Wasm-operand-widths]and finally stop with error
libavcodec/arm/mlpdsp_armv5te.S:5180:9: error: unknown directive
.hword (75f - 0b) / 2
^
libavcodec/arm/mlpdsp_armv5te.S:5182:9: error: unknown directive
.hword (76f - 0b) / 2
^
libavcodec/arm/mlpdsp_armv5te.S:5184:9: error: unknown directive
.hword (77f - 0b) / 2
^
libavcodec/arm/mlpdsp_armv5te.S:5186:9: error: unknown directive
.hword (78f - 0b) / 2
^
libavcodec/arm/mlpdsp_armv5te.S:5648:9: error: unknown directiveIs there anyone met the same problem ?
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FFmpeg crashing on drawtext filter (ffmpeg-python)
31 août 2023, par DeadSecHey guys so im trying to use ffmpeg-python to add text to a video but its crashing at


[Parsed_drawtext_0 @ 0000012ea115ee80] Setting 'text' to value 'hi'

and I'm not sure what I can do to fix this problem. I tried pure FFmpeg command-line style and still the same issue where it gets stuck at
Setting text to valueand it simply outputs a 0byte mp4 after crashing.

My code :


os.environ['FONTCONFIG_FILE'] = r'C:\Users\NOP\NOP\NOP\NOP\binaries\fonts\fonts.conf'
 os.environ['FONTCONFIG_PATH'] = r'C:\Users\NOP\NOP\NOP\NOP\binaries\fonts'
 os.environ['FC_CONFIG_DIR'] = r'C:\Users\NOP\NOP\NOP\NOP\binaries\fonts'
 in_ = ffmpeg.input(output_video_logo)
 in_ = in_.drawtext(text='hi')
 ffmpeg.output(in_, output_video).global_args('-loglevel', 'debug').run(cmd=FFMPEG_PATH)


Font config file :


<?xml version="1.0"?>


<fontconfig>





 <dir>WINDOWSFONTDIR</dir>
 <dir>~/fonts</dir>
 <dir prefix="cwd">.</dir>
 <dir>~/.fonts</dir>


 <match target="pattern">
 <test qual="any">
 <string>mono</string>
 </test>
 <edit mode="assign">
 <string>monospace</string>
 </edit>
 </match>


 <match target="pattern">
 <test qual="any">
 <string>sans serif</string>
 </test>
 <edit mode="assign">
 <string>sans-serif</string>
 </edit>
 </match>


 <match target="pattern">
 <test qual="any">
 <string>sans</string>
 </test>
 <edit mode="assign">
 <string>sans-serif</string>
 </edit>
 </match>


 <include>conf.d</include>



 <cachedir>WINDOWSTEMPDIR_FONTCONFIG_CACHE</cachedir>
 <cachedir>~/.fontconfig</cachedir>

 <config>


 <rescan>
 <int>30</int>
 </rescan>
 </config>

</fontconfig>


Is this a issue with any of my fontconfig or script ? I'm really lost on fixing this.


As requested by Rotem tried adding new input to drawtext and this was the output before crashing with no error message :
Successfully opened the file.


[Parsed_drawtext_0 @ 00000171a2f0f900] Setting 'box' to value '1'
[Parsed_drawtext_0 @ 00000171a2f0f900] Setting 'boxcolor' to value 'yellow'
[Parsed_drawtext_0 @ 00000171a2f0f900] Setting 'fontcolor' to value 'blue'
[Parsed_drawtext_0 @ 00000171a2f0f900] Setting 'fontsize' to value '72'
[Parsed_drawtext_0 @ 00000171a2f0f900] Setting 'text' to value 'hi'
[Parsed_drawtext_0 @ 00000171a2f0f900] Setting 'x' to value '10'
[Parsed_drawtext_0 @ 00000171a2f0f900] Setting 'y' to value '10'


Full log :
https://pastebin.com/E6sHvwUz


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