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Granite de l’Aber Ildut
9 septembre 2011, par
Mis à jour : Septembre 2011
Langue : français
Type : Texte
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Géodiversité
9 septembre 2011, par ,
Mis à jour : Août 2018
Langue : français
Type : Texte
Autres articles (75)
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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. -
Des sites réalisés avec MediaSPIP
2 mai 2011, parCette page présente quelques-uns des sites fonctionnant sous MediaSPIP.
Vous pouvez bien entendu ajouter le votre grâce au formulaire en bas de page. -
Support audio et vidéo HTML5
10 avril 2011MediaSPIP utilise les balises HTML5 video et audio pour la lecture de documents multimedia en profitant des dernières innovations du W3C supportées par les navigateurs modernes.
Pour les navigateurs plus anciens, le lecteur flash Flowplayer est utilisé.
Le lecteur HTML5 utilisé a été spécifiquement créé pour MediaSPIP : il est complètement modifiable graphiquement pour correspondre à un thème choisi.
Ces technologies permettent de distribuer vidéo et son à la fois sur des ordinateurs conventionnels (...)
Sur d’autres sites (6549)
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ffmpeg concatenate results in bad/garbled output for second input file
28 février 2017, par DanI am trying to concatenate two videos together using the ffmpeg concat demuxer : a 5-second intro splash and a 60-second main/body video. I understand that the encoding needs to be the same on both files for this to work. I think they are, but the resulting output shows the intro just fine, followed by a totally garbled body. What am I missing ?
ffmpeg -f concat -i concat.txt -c copy output.mp4Contents of
concat.txt:file 'intro.mp4'
file 'body.mp4'and the output of
ffprobefor both input files :intro.mp4
ffprobe version 3.2.4 Copyright (c) 2007-2017 the FFmpeg developers
built with Apple LLVM version 7.0.2 (clang-700.1.81)
configuration: --prefix=/usr/local/Cellar/ffmpeg/3.2.4 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-opencl --disable-lzma --enable-vda
libavutil 55. 34.101 / 55. 34.101
libavcodec 57. 64.101 / 57. 64.101
libavformat 57. 56.101 / 57. 56.101
libavdevice 57. 1.100 / 57. 1.100
libavfilter 6. 65.100 / 6. 65.100
libavresample 3. 1. 0 / 3. 1. 0
libswscale 4. 2.100 / 4. 2.100
libswresample 2. 3.100 / 2. 3.100
libpostproc 54. 1.100 / 54. 1.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'intro.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf57.56.101
Duration: 00:00:05.04, start: 0.000000, bitrate: 73 kb/s
Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 960x720 [SAR 1:1 DAR 4:3], 69 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
Metadata:
handler_name : VideoHandlerbody.mp4
ffprobe version 3.2.4 Copyright (c) 2007-2017 the FFmpeg developers
built with Apple LLVM version 7.0.2 (clang-700.1.81)
configuration: --prefix=/usr/local/Cellar/ffmpeg/3.2.4 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-opencl --disable-lzma --enable-vda
libavutil 55. 34.101 / 55. 34.101
libavcodec 57. 64.101 / 57. 64.101
libavformat 57. 56.101 / 57. 56.101
libavdevice 57. 1.100 / 57. 1.100
libavfilter 6. 65.100 / 6. 65.100
libavresample 3. 1. 0 / 3. 1. 0
libswscale 4. 2.100 / 4. 2.100
libswresample 2. 3.100 / 2. 3.100
libpostproc 54. 1.100 / 54. 1.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'body.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf57.56.101
Duration: 00:00:36.84, start: 0.000000, bitrate: 5615 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 960x720 [SAR 1:1 DAR 4:3], 5613 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
Metadata:
handler_name : VideoHandlerOutput of ffmpeg :
ffmpeg version 3.2.4 Copyright (c) 2000-2017 the FFmpeg developers
built with Apple LLVM version 7.0.2 (clang-700.1.81)
configuration: --prefix=/usr/local/Cellar/ffmpeg/3.2.4 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-opencl --disable-lzma --enable-vda
libavutil 55. 34.101 / 55. 34.101
libavcodec 57. 64.101 / 57. 64.101
libavformat 57. 56.101 / 57. 56.101
libavdevice 57. 1.100 / 57. 1.100
libavfilter 6. 65.100 / 6. 65.100
libavresample 3. 1. 0 / 3. 1. 0
libswscale 4. 2.100 / 4. 2.100
libswresample 2. 3.100 / 2. 3.100
libpostproc 54. 1.100 / 54. 1.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fdda3018000] Auto-inserting h264_mp4toannexb bitstream filter
Input #0, concat, from 'concat.txt':
Duration: N/A, start: 0.000000, bitrate: 69 kb/s
Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 960x720 [SAR 1:1 DAR 4:3], 69 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc
Metadata:
handler_name : VideoHandler
Output #0, mp4, to 'output.mp4':
Metadata:
encoder : Lavf57.56.101
Stream #0:0(eng): Video: h264 (High) ([33][0][0][0] / 0x0021), yuv420p, 960x720 [SAR 1:1 DAR 4:3], q=2-31, 69 kb/s, 25 fps, 25 tbr, 12800 tbn, 12800 tbc
Metadata:
handler_name : VideoHandler
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fdda3800000] Auto-inserting h264_mp4toannexb bitstream filter
frame= 1047 fps=973 q=-1.0 Lsize= 25299kB time=00:00:41.76 bitrate=4962.8kbits/s speed=38.8x
video:25286kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.050621%As far as I can tell, everything is identical except for the bitrate and language. Setting the language doesn’t seem to make a difference. I’ve tried to transcode the intro to a higher bitrate for the intro but can’t get it to stick in the output. I’m OK with transcoding one of the files (ideally the intro) but don’t know what else to try to change. Thoughts ?
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The complete guide on tracking your websites and web apps into multiple Piwiks and how to do it easily & efficiently
23 février 2017, par InnoCraft — Community, DevelopmentGetting the tracking of your website and apps right is crucial to your success as you need to ensure the measured data is meaningful and correct. That’s why we, at InnoCraft, help our clients setting up their web tracking and digital measurement strategy. Some challenges include tracking your analytics data into multiple Piwik services as well as the tracking of single-page websites and web applications (covered in a previous article). In this blog post, we explain how to track your data into multiple Piwik websites correctly.
Embedding the tracking code
First of all you need to embed your JavaScript tracking code into your website or app as usual. If you haven’t done this yet : Log in to your Piwik, click on “Administration” in the top right and go to “Tracking Code”. There you have various options to adjust your tracking code to your needs.
Tracking the same data into different websites
Let’s assume you have set up the regular JavaScript tracking code and you want to track the same data into a second Piwik website. This second Piwik website can be either on the same Piwik installation or on a different Piwik. To do this, add the following line to your tracking code :
_paq.push(['addTracker', 'https://$yourPiwikDomain/piwik.php', idSite]);It should look like this :
var u = '//$yourPiwikDomain';
_paq.push(['addTracker', u + '/piwik.php', var idSite = 2]); // adds an additional tracker
_paq.push(['setSiteId', '1']); // configures your regular Piwik tracker
_paq.push(['setTrackerUrl', u + 'piwik.php']);This will track the same data into website 1 and website 2 of your Piwik installation. You can also change the domain in
addTrackerto point it to a different Piwik installation :_paq.push(['addTracker', '//$differentPiwikDomain/piwik.php', var idSite = 2]);All Piwik tracker methods that you call afterwards will be applied to all trackers. Say you call
_paq.push(['disableCookies']); _paq.push(['trackPageView']);, then both methods will be called on all tracker instances assuring they will behave the same and will track the same data into both Piwik websites.Tracking different data into different websites
If you want to track only certain data into one website, and different data into an additional website, you need to configure the trackers differently. For example, you want to enable link tracking only for one tracker, but not for the other. The problem is that calling
_paq.push(['enableLinkTracking']);enables link tracking on all of your trackers. To workaround this limitation, you can configure your trackers differently like this :window.piwikAsyncInit = function () {
Piwik.on('TrackerSetup', function (tracker) {
if (tracker.getSiteId() == 2
|| tracker.getTrackerUrl() === '//$yourPiwikDomain/piwik.php') {
tracker.enableLinkTracking();
}
});
};Now it enables link tracking only for the tracker that is configured for a certain website ID or Piwik domain.
Accessing a previously generated tracker instance
When you configure a tracker via
_paq.push, you create a so called “Async tracker” because Piwik will be loaded asynchronously and create the tracker instance as soon as it is loaded. If you need to get the instance of such a tracker, you can use the methodPiwik.getAsyncTracker(trackerUrl, idSite). This can be useful if you have a single-page website and want to track different data into different websites :window.addEventListener('hashchange', function() {
if ('undefined' === typeof Piwik) {
// Piwik might not be loaded yet
return;
}
var tracker1 = Piwik.getAsyncTracker('//$yourPiwikDomain/piwik.php', var idSite = 1);
var tracker2 = Piwik.getAsyncTracker('//$yourPiwikDomain/piwik.php', var idSite = 2);
tracker1.setCurrentUrl('/' + window.location.hash.substr(1));
tracker2.setCurrentUrl('/mywebsite/' + window.location.hash.substr(1));
});Tracking different data into multiple Piwik installations without using “_paq”
Some users prefer to not use
_paq.pushand instead directly create tracker instances themselves using the methodPiwik.getTracker(trackerUrl, idSite)like this :window.piwikAsyncInit = function () {
var tracker1 = Piwik.getTracker('//$yourPiwikdomain/piwik.php', var idSite = 1);
tracker1.disableCookies();
var tracker2 = Piwik.getTracker('//$yourPiwikdomain/piwik.php', var idSite = 2);
tracker2.enableLinkTracking();
tracker1.trackPageView();
tracker2.trackPageView();
};We usually don’t recommend creating trackers manually as it is more complicated and you need to make sure to configure trackers in the right order. For example to prevent the setting of any cookies, it is recommended to call
disableCookiesbefore calling any other methods. If you want to create your trackers manually and you use any of the following methods, make sure to call them in this order :disableCookies(), setAPIUrl(), enableCrossDomainLinking(), setCookiePath(), setCookieDomain(), setDomains(), setUserId(), enableLinkTracking()Roll-Up Reporting – the easy and efficient way
Often users track data into multiple websites because they need aggregated data over all their websites. They want to see all statistics for a single website, but also which pages were viewed across all their websites, or how much traffic they got from a specific website or search engine across all websites. This means they add a second tracker to all their websites and track data not only into the regular Piwik website, but also into one additional website that gives them statistics over all websites. This has several disadvantages :
- Complexity in getting the tracking code right and the time needed to integrate and maintain it
- Slower website performance because everything needs to be tracked into several websites. This can decrease your conversions and sales
- Slower Piwik performance because it has to handle twice as much traffic. This means tracking becomes slower, generating the report becomes slower, and the database gets twice as big
Luckily, there is a better solution called Roll-Up Reporting. With Roll-Up Reporting, you can get aggregated data over all websites and / or for a group of websites without any of these disadvantages. It lets you create as many Roll-Ups as you wish and you can choose which websites’ data should be aggregated together into a new website.
We had customers who were able to remove one Piwik tracker because of this feature which resulted in less server costs, a faster website, and a faster Piwik. On top of all these advantages, it also lets you view the Visitor Log, Real-time Map, and other widgets and reports across several websites.
Questions ?
If you got any questions, please let us know and get in touch with us. You can find more information about the Piwik JavaScript tracker on the Piwik Developer Zone. There is a section dedicated to Multiple Piwik Trackers.
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How can I remove "original display aspect ratio" from a mp4 file using ffmpeg ?
21 juin 2020, par aveceuxI wish to remove the "original display aspect ratio" entry from the video section.



Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4
Format settings : CABAC / 4 Ref Frames
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 44 min 29 s
Bit rate : 5 001 kb/s
Width : 1 920 pixels
Height : 1 072 pixels
Display aspect ratio : 16:9
Original display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 25.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.097
Stream size : 1.55 GiB (97%)



I tried the following commands,



ffmpeg -i input.mp4 -map_metadata -1 -c copy output.mp4



ffmpeg -i input.mp4 -metadata original_display_aspect_ratio=0 -c copy output.mp4



but none of them worked.



If I want to remove the "original display aspect ratio" entry completely, what ffmpeg command can I use to achieve that ?



Thank you.



EDIT :
The result of mediainfo -f :



General
Count : 331
Count of stream of this kind : 1
Kind of stream : General
Kind of stream : General
Stream identifier : 0
Count of video streams : 1
Count of audio streams : 1
Video_Format_List : AVC
Video_Format_WithHint_List : AVC
Codecs Video : AVC
Audio_Format_List : AAC LC
Audio_Format_WithHint_List : AAC LC
Audio codecs : AAC LC
Complete name : Downloads/3.mp4
File name : Downloads/3.mp4
File name : Downloads/3
File extension : mp4
Format : MPEG-4
Format : MPEG-4
Format/Extensions usually used : mov mp4 m4v m4a m4b m4p 3ga 3gpa 3gpp 3gp 3gpp2 3g2 k3g jpm jpx mqv ismv isma ismt f4a f4b f4v
Commercial name : MPEG-4
Format profile : Base Media
Internet media type : video/mp4
Codec ID : isom
Codec ID : isom (isom/iso2/avc1/mp41/letv)
Codec ID/Url : http://www.apple.com/quicktime/download/standalone.html
CodecID_Compatible : isom/iso2/avc1/mp41/letv
File size : 1715744367
File size : 1.60 GiB
File size : 2 GiB
File size : 1.6 GiB
File size : 1.60 GiB
File size : 1.598 GiB
Duration : 2670080
Duration : 44 min 30 s
Duration : 44 min 30 s 80 ms
Duration : 44 min 30 s
Duration : 00:44:30.080
Duration : 00:44:29:24
Duration : 00:44:30.080 (00:44:29:24)
Overall bit rate : 5140653
Overall bit rate : 5 141 kb/s
Frame rate : 25.000
Frame rate : 25.000 FPS
Frame count : 66749
Stream size : 3988740
Stream size : 3.80 MiB (0%)
Stream size : 4 MiB
Stream size : 3.8 MiB
Stream size : 3.80 MiB
Stream size : 3.804 MiB
Stream size : 3.80 MiB (0%)
Proportion of this stream : 0.00232
HeaderSize : 1510470
DataSize : 1711755635
FooterSize : 2478262
IsStreamable : Yes
File creation date : UTC 2019-02-20 11:24:46.448
File creation date (local) : 2019-02-20 19:24:46.448
File last modification date : UTC 2017-05-26 00:00:00.000
File last modification date (local) : 2017-05-26 08:00:00.000
Writing application : Lavf56.15.102
Writing application : Lavf56.15.102

Video
Count : 348
Count of stream of this kind : 1
Kind of stream : Video
Kind of stream : Video
Stream identifier : 0
StreamOrder : 0
ID : 1
ID : 1
Format : AVC
Format : AVC
Format/Info : Advanced Video Codec
Format/Url : http://developers.videolan.org/x264.html
Commercial name : AVC
Format profile : High@L4
Format settings : CABAC / 4 Ref Frames
Format settings, CABAC : Yes
Format settings, CABAC : Yes
Format settings, ReFrames : 4
Format settings, ReFrames : 4 frames
Internet media type : video/H264
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 2669960
Duration : 44 min 29 s
Duration : 44 min 29 s 960 ms
Duration : 44 min 29 s
Duration : 00:44:29.960
Duration : 00:44:29:24
Duration : 00:44:29.960 (00:44:29:24)
Bit rate : 5000927
Bit rate : 5 001 kb/s
Width : 1920
Width : 1 920 pixels
Height : 1072
Height : 1 072 pixels
Sampled_Width : 1920
Sampled_Height : 1072
Pixel aspect ratio : 0.993
Display aspect ratio : 1.779
Display aspect ratio : 16:9
Original display aspect ratio : 1.778
Original display aspect ratio : 16:9
Rotation : 0.000
Frame rate mode : CFR
Frame rate mode : Constant
FrameRate_Mode_Original : VFR
Frame rate : 25.000
Frame rate : 25.000 FPS
Frame count : 66749
Color space : YUV
Chroma subsampling : 4:2:0
Chroma subsampling : 4:2:0
Bit depth : 8
Bit depth : 8 bits
Scan type : Progressive
Scan type : Progressive
Bits/(Pixel*Frame) : 0.097
Stream size : 1669034254
Stream size : 1.55 GiB (97%)
Stream size : 2 GiB
Stream size : 1.6 GiB
Stream size : 1.55 GiB
Stream size : 1.554 GiB
Stream size : 1.55 GiB (97%)
Proportion of this stream : 0.97278
Codec configuration box : avcC

Audio
Count : 277
Count of stream of this kind : 1
Kind of stream : Audio
Kind of stream : Audio
Stream identifier : 0
StreamOrder : 1
ID : 2
ID : 2
Format : AAC
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Commercial name : AAC
Format_AdditionalFeatures : LC
Codec ID : mp4a-40-2
Duration : 2670080
Duration : 44 min 30 s
Duration : 44 min 30 s 80 ms
Duration : 44 min 30 s
Duration : 00:44:30.080
Duration : 00:44:34:09
Duration : 00:44:30.080 (00:44:34:09)
Bit rate mode : CBR
Bit rate mode : Constant
Bit rate : 128000
Bit rate : 128 kb/s
Channel(s) : 2
Channel(s) : 2 channels
Channel positions : Front: L R
Channel positions : 2/0/0
Channel layout : L R
Samples per frame : 1024
Sampling rate : 44100
Sampling rate : 44.1 kHz
Samples count : 117750528
Frame rate : 43.066
Frame rate : 43.066 FPS (1024 SPF)
Frame count : 114991
Compression mode : Lossy
Compression mode : Lossy
Stream size : 42721373
Stream size : 40.7 MiB (2%)
Stream size : 41 MiB
Stream size : 41 MiB
Stream size : 40.7 MiB
Stream size : 40.74 MiB
Stream size : 40.7 MiB (2%)
Proportion of this stream : 0.02490
Default : Yes
Default : Yes
Alternate group : 1
Alternate group : 1


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