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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 (112)
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Keeping control of your media in your hands
13 avril 2011, parThe vocabulary used on this site and around MediaSPIP in general, aims to avoid reference to Web 2.0 and the companies that profit from media-sharing.
While using MediaSPIP, you are invited to avoid using words like "Brand", "Cloud" and "Market".
MediaSPIP is designed to facilitate the sharing of creative media online, while allowing authors to retain complete control of their work.
MediaSPIP aims to be accessible to as many people as possible and development is based on expanding the (...) -
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 (...) -
Ajouter notes et légendes aux images
7 février 2011, parPour pouvoir ajouter notes et légendes aux images, la première étape est d’installer le plugin "Légendes".
Une fois le plugin activé, vous pouvez le configurer dans l’espace de configuration afin de modifier les droits de création / modification et de suppression des notes. Par défaut seuls les administrateurs du site peuvent ajouter des notes aux images.
Modification lors de l’ajout d’un média
Lors de l’ajout d’un média de type "image" un nouveau bouton apparait au dessus de la prévisualisation (...)
Sur d’autres sites (7921)
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How to add subtitles using FFmpeg-kit ?
17 novembre 2024, par Mohammed BekeleI'm running a Flutter app with Ffmpeg-kit package to burn a subtitle on a video. I have a words list with the timings and map that to generate an srt and ass file, but when executing this it didn't work.


Firstly, here is how I generated the Ass file.


Future<string> _createAssFile() async {
 String filePath = await getAssOutputFilePath();

 final file = File(filePath);
 final buffer = StringBuffer();

 // Write ASS headers
 buffer.writeln('[Script Info]');
 buffer.writeln('Title: Generated ASS');
 buffer.writeln('ScriptType: v4.00+');
 buffer.writeln('Collisions: Normal');
 buffer.writeln('PlayDepth: 0');
 buffer.writeln('Timer: 100,0000');
 buffer.writeln('[V4+ Styles]');
 buffer.writeln(
 'Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding');
 buffer.writeln(
 'Style: Default,Arial,40,&H00FFFFFF,&H000000FF,&H00000000,&H80000000,1,1,1,1,100,100,0,0,1,1,1,2,10,10,10,1');
 buffer.writeln('[Events]');
 buffer.writeln(
 'Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text');

 // Write events (subtitles)
 for (int i = 0; i < widget.words.length; i++) {
 final word = widget.words[i];
 final startTime = _formatAssTime(word['startTime'].toDouble());
 final endTime = _formatAssTime(word['endTime'].toDouble());
 final text = word['word'];

 buffer.writeln('Dialogue: 0,$startTime,$endTime,Default,,0,0,0,,$text');
 }

 await file.writeAsString(buffer.toString());
 return filePath;
 }

 String _formatAssTime(double seconds) {
 final int hours = seconds ~/ 3600;
 final int minutes = ((seconds % 3600) ~/ 60);
 final int secs = (seconds % 60).toInt();
 final int millis = ((seconds - secs) * 1000).toInt() % 1000;

 return '${hours.toString().padLeft(1, '0')}:${minutes.toString().padLeft(2, '0')}:${secs.toString().padLeft(2, '0')}.${(millis ~/ 10).toString().padLeft(2, '0')}';
 }
</string>

Then I used this command which was the official way of adding ass file to a video.


String newCmd = "-i $videoPath -vf ass=$assFilePath -c:a copy $_outputPath";


Yet when executing this command it did not work. However I changed it to this command


String newCmd = "-i $videoPath -i $assFilePath $_outputPath";


Well, that code works but the styling is not being applied. So I tried yet another command to filter and position the ass file.


String newCmd = "-i $videoPath -i $assFilePath -filter_complex \"[0:v][1:s]ass=\\an5:text='%{event.text}',scale=iw*0.8:ih*0.8,setdar=16/9[outv]\" -map [outv] -c:a copy $_outputPath";


This made it even worse, because the app crashed when I ran this. Also there is a log for this command before crashing


F/libc (19624): Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x19 in tid 21314 (pool-4-thread-7), pid 19624 (ple.caption_app)
*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
Build fingerprint: 'samsung/a15nsxx/a15:14/UP1A.231005.007/A155FXXU1AWKA:user/release-keys'
Revision: '5'
ABI: 'arm64'
Processor: '7'
Timestamp: 2024-07-10 19:27:40.812476860+0300
Process uptime: 1746s
Cmdline: com.example.caption_app
pid: 19624, tid: 21314, name: pool-4-thread-7 >>> com.example.caption_app <<<
uid: 10377
tagged_addr_ctrl: 0000000000000001 (PR_TAGGED_ADDR_ENABLE)
signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x0000000000000019
Cause: null pointer dereference
 x0 0000000000000001 x1 b400006ec98d8660 x2 0000000000000000 x3 0000000000000002
 x4 0000006f62d1ea12 x5 b400006e04f745ea x6 352f35372f64352f x7 7f7f7f7f7f7f7f7f
 x8 632ace36577a905e x9 632ace36577a905e x10 0000006e191378c0 x11 0000000000000001
 x12 0000000000000001 x13 0000000000000000 x14 0000000000000004 x15 0000000000000008
 x16 0000006e27ffa358 x17 0000006e27dbfb00 x18 0000006e00d48000 x19 0000006f62d1f0e8
 x20 0000006f62d24000 x21 0000006e27ffc5d0 x22 0000006e27ffc5f0 x23 0000000000000000
 x24 b400006f3f089248 x25 0000006f62d1f220 x26 b400006f3f057b20 x27 0000000000000002
 x28 0000000000000088 x29 0000006f62d1f100
 lr 0000006e27dbfb0c sp 0000006f62d1f0a0 pc 0000006e27dbfb10 pst 0000000060001000
1 total frames
backtrace:
 #00 pc 0000000000121b10 /data/app/~~oWqjrGA2indQhuEw6u_J2A==/com.example.caption_app-u2Ofk54FVtMc5D-i3SLC6g==/base.apk!libavfilter.so (offset 0x10a46000) (avfilter_inout_free+16) 
Lost connection to device.


I tried the normal command in my local machine on Windows, and this is what I used


ffmpeg -i F:\ffmpeg\video.avi -vf subtitles='F\:\\ffmpeg\\caption.srt':force_style='Fontsize=24' F:\ffmpeg\new.mp4


As you can see above when subtitles are used it had an extra backslashes for each path and a pre backslash after the partition letter. But I don't know if this does apply for android devices. How can I make sense of this ?


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ffmpeg command to convert 720p to 1080p, 1440p, 2160p compatible with YouTube [closed]
24 juin 2024, par Tendekai MuchenjeI have a video that I created in Final Cut Pro. When i uploaded it to Youtube, it only maxes out at 720p. I would like it to have higher options like 1080, 1440 and 2160 even if the quality does not change. Maybe 2160 is impossible, but 1440p would be nice. I have tried this command, but the resulting file is unplayable, it only plays audio.


ffmpeg -i Hey\ Girl.mov -vf scale=3840x2160:flags=lanczos -c:v libx264 -crf 13 -c:a aac -b:a 512k -preset slow hey_girl_hd.mov


I am looking for a command that would make at least 1080 and 1440 work on YouTube. If 2160 can work, that would be great too. If it matters, here is all the info that ffprobe throws out about the file


{
 "streams": [
 {
 "index": 0,
 "codec_name": "pcm_s24le",
 "codec_long_name": "PCM signed 24-bit little-endian",
 "codec_type": "audio",
 "codec_tag_string": "lpcm",
 "codec_tag": "0x6d63706c",
 "sample_fmt": "s32",
 "sample_rate": "48000",
 "channels": 2,
 "bits_per_sample": 24,
 "r_frame_rate": "0/0",
 "avg_frame_rate": "0/0",
 "time_base": "1/48000",
 "start_pts": 0,
 "start_time": "0.000000",
 "duration_ts": 8987200,
 "duration": "187.233333",
 "bit_rate": "2304000",
 "bits_per_raw_sample": "24",
 "nb_frames": "8987200",
 "disposition": {
 "default": 1,
 "dub": 0,
 "original": 0,
 "comment": 0,
 "lyrics": 0,
 "karaoke": 0,
 "forced": 0,
 "hearing_impaired": 0,
 "visual_impaired": 0,
 "clean_effects": 0,
 "attached_pic": 0,
 "timed_thumbnails": 0
 },
 "tags": {
 "creation_time": "2024-04-15T23:26:08.000000Z",
 "language": "und",
 "handler_name": "Core Media Audio",
 "vendor_id": "[0][0][0][0]"
 }
 },
 {
 "index": 1,
 "codec_name": "prores",
 "codec_long_name": "Apple ProRes (iCodec Pro)",
 "profile": "Standard",
 "codec_type": "video",
 "codec_tag_string": "apcn",
 "codec_tag": "0x6e637061",
 "width": 1280,
 "height": 720,
 "coded_width": 1280,
 "coded_height": 720,
 "closed_captions": 0,
 "has_b_frames": 0,
 "sample_aspect_ratio": "1:1",
 "display_aspect_ratio": "16:9",
 "pix_fmt": "yuv422p10le",
 "level": -99,
 "color_range": "tv",
 "color_space": "bt709",
 "color_transfer": "bt709",
 "color_primaries": "bt709",
 "field_order": "progressive",
 "refs": 1,
 "r_frame_rate": "60/1",
 "avg_frame_rate": "60/1",
 "time_base": "1/6000",
 "start_pts": 0,
 "start_time": "0.000000",
 "duration_ts": 1123400,
 "duration": "187.233333",
 "bit_rate": "138655195",
 "bits_per_raw_sample": "10",
 "nb_frames": "11234",
 "disposition": {
 "default": 1,
 "dub": 0,
 "original": 0,
 "comment": 0,
 "lyrics": 0,
 "karaoke": 0,
 "forced": 0,
 "hearing_impaired": 0,
 "visual_impaired": 0,
 "clean_effects": 0,
 "attached_pic": 0,
 "timed_thumbnails": 0
 },
 "tags": {
 "creation_time": "2024-04-15T23:26:08.000000Z",
 "language": "und",
 "handler_name": "Core Media Video",
 "vendor_id": "[0][0][0][0]",
 "encoder": "Apple ProRes 422",
 "timecode": "00:00:00:00"
 }
 },
 {
 "index": 2,
 "codec_type": "data",
 "codec_tag_string": "tmcd",
 "codec_tag": "0x64636d74",
 "r_frame_rate": "0/0",
 "avg_frame_rate": "6000/100",
 "time_base": "1/6000",
 "start_pts": 0,
 "start_time": "0.000000",
 "duration_ts": 1123400,
 "duration": "187.233333",
 "nb_frames": "1",
 "disposition": {
 "default": 1,
 "dub": 0,
 "original": 0,
 "comment": 0,
 "lyrics": 0,
 "karaoke": 0,
 "forced": 0,
 "hearing_impaired": 0,
 "visual_impaired": 0,
 "clean_effects": 0,
 "attached_pic": 0,
 "timed_thumbnails": 0
 },
 "tags": {
 "creation_time": "2024-04-15T23:26:08.000000Z",
 "language": "und",
 "handler_name": "Core Media Time Code",
 "timecode": "00:00:00:00"
 }
 }
 ],
 "format": {
 "filename": "Hey Girl.mov",
 "nb_streams": 3,
 "nb_programs": 0,
 "format_name": "mov,mp4,m4a,3gp,3g2,mj2",
 "format_long_name": "QuickTime / MOV",
 "start_time": "0.000000",
 "duration": "187.233333",
 "size": "3306875809",
 "bit_rate": "141294320",
 "probe_score": 100,
 "tags": {
 "major_brand": "qt ",
 "minor_version": "0",
 "compatible_brands": "qt ",
 "creation_time": "2024-04-15T23:26:08.000000Z",
 "com.apple.quicktime.keywords": "Hey GIRL",
 "com.apple.quicktime.description": "This video is about Hey Girl",
 "com.apple.quicktime.author": "Ja Mo",
 "com.apple.quicktime.displayname": "Hey Girl",
 "com.apple.quicktime.title": "Hey Girl"
 }
 }
}


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Marketing Analytics in Banking : How to Be Effective and Compliant
17 septembre 2024, par Daniel Crough — Banking and Financial Services, Marketing, Privacy, banks, finserv, fintech, marketing analyticsMarketing analytics is reshaping decision-making in the financial sector, with recent studies showing it influences over half of all marketing strategies. However, marketers surveyed by MarketingWeek identify data and analytics as the biggest skill gap in their department.
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