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La conservation du net art au musée. Les stratégies à l’œuvre
26 mai 2011
Mis à jour : Juillet 2013
Langue : français
Type : Texte
Autres articles (106)
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Publier sur MédiaSpip
13 juin 2013Puis-je poster des contenus à partir d’une tablette Ipad ?
Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir -
Encoding and processing into web-friendly formats
13 avril 2011, parMediaSPIP automatically converts uploaded files to internet-compatible formats.
Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
All uploaded files are stored online in their original format, so you can (...) -
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 (11512)
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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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FFmpeg av_read_frame returns packets from audio stream
1er août 2018, par yultanI am currently trying to learn the FFmpeg API, following this tutorial. However, I already have issues with the first lesson on video decoding. My code is basically the same as the one from the tutorial except I am using C++. My issue is that the video stream does not match the one from the packet returned by
av_read_frame.The video stream is obtained looping on the available streams until the video stream is found.
for(int i = 0; i < pFormatCtx->nb_streams; i++) { // nb_streams == 2
if(pFormatCtx->streams[i]->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
videoStream = i;
break; // videoStream == 0
}
}Then when retrieving the frame data, it seams grabbing the audio channel.
while(av_read_frame(pFormatCtx, &packet) >= 0) { // read returns 0
// Is this a packet from the video stream?
if(packet.stream_index == videoStream) {
//packet.stream_index == 1, which correspond to the audio stream
}
}I have not found examples online where this test is actually failing. Have I miss some way to specify the
stream_indexthat is not in the tutorial ? Maybe the tutorial is not up to date and is doing something wrong ? If so, what is the correct way to extract the frame data ? In case that matters, I am using the latest FFmpeg 4.0.2 build, on Windows 64-bits, compiling with Visual Studio 2017.On videos with no sound, the two streams match and I am able to decode and display the frames correctly.
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FFMPEG-KIT - Video is cut after adding 2 watermarks
7 août 2023, par dfjickI made a FFMPEG-KIT command to add 2 PNG watermarks to the video and everything went smoothly.


String ffmpegCommand = "-y -i " + videoPath +
 " -i " + watermarkImagePath +
 " -i " + userID +
 " -filter_complex " +
 "\"[0:v][1:v]overlay=x='if(lt(mod(t,10),5),10,W-w-10)':y='if(lt(mod(t,10),5),10,H-h-35)',\"" +
 "\"overlay=x='if(lt(mod(t,10),5),7,W-w-7)':y='if(lt(mod(t,10),5),165,H-h-15)'[out]\"" +
 " -map [out] -map 0:a -c:v libx264 -crf 18 -preset slow -c:a aac " + outputPath;


But for videos that are longer than 20 seconds, the results don't match the original video, sometimes the videos are only <20 seconds and at random times.


but i got this error, do you guys know how to fix it ?


W/ffmpeg-kit: [mov,mp4,m4a,3gp,3g2,mj2 @ 0xb400007c5c1243f0] Packet corrupt (stream = 1, dts = 366976)
W/ffmpeg-kit: [mov,mp4,m4a,3gp,3g2,mj2 @ 0xb400007c5c1243f0] .
E/ffmpeg-kit: [NULL @ 0xb400007c6c179400] Invalid NAL unit size (63547 > 20190).
E/ffmpeg-kit: [NULL @ 0xb400007c6c179400] missing picture in access unit with size 20194
W/ffmpeg-kit: /storage/emulated/0/DCIM/android_100394_20230807_162805_5465009.mp4: corrupt input packet in stream 1
E/ffmpeg-kit: [h264 @ 0xb400007c6c210750] Invalid NAL unit size (63547 > 20190).
E/ffmpeg-kit: [h264 @ 0xb400007c6c210750] Error splitting the input into NAL units.
E/ffmpeg-kit: Error while decoding stream #0:1: Invalid data found when processing input


I've tried to use this
-fflags +discardcorrupt, but the result is still the same. the duration of the video that has been watermarked does not match the original video

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