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Rennes Emotion Map 2010-11
19 octobre 2011, par
Mis à jour : Juillet 2013
Langue : français
Type : Texte
Autres articles (35)
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Contribute to documentation
13 avril 2011Documentation is vital to the development of improved technical capabilities.
MediaSPIP welcomes documentation by users as well as developers - including : critique of existing features and functions articles contributed by developers, administrators, content producers and editors screenshots to illustrate the above translations of existing documentation into other languages
To contribute, register to the project users’ mailing (...) -
De l’upload à la vidéo finale [version standalone]
31 janvier 2010, parLe chemin d’un document audio ou vidéo dans SPIPMotion est divisé en trois étapes distinctes.
Upload et récupération d’informations de la vidéo source
Dans un premier temps, il est nécessaire de créer un article SPIP et de lui joindre le document vidéo "source".
Au moment où ce document est joint à l’article, deux actions supplémentaires au comportement normal sont exécutées : La récupération des informations techniques des flux audio et video du fichier ; La génération d’une vignette : extraction d’une (...) -
HTML5 audio and video support
13 avril 2011, parMediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
For older browsers the Flowplayer flash fallback is used.
MediaSPIP allows for media playback on major mobile platforms with the above (...)
Sur d’autres sites (6283)
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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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