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| en:create:media [12.01.2016 17:37] – michael.brill | en:create:media [12.01.2016 18:23] – Updated English Chapter to match German Chapter michael.brill |
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| Since the HTML5 tag ''<audio>'' has become quite common now, it is well suited for embedding audio files. Only very outdated browsers (e.g. Internet Explorer older than version 9) do not support this tag. | Since the HTML5 tag ''<audio>'' has become quite common now, it is well suited for embedding audio files. Only very outdated browsers (e.g. Internet Explorer older than version 9) do not support this tag. |
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| In order to make sure the audio file is played in all contemporary browsers, it should be present in mp3 __and__ ogg format. However, mp3 alone already provides a decent coverage. There is a number of free tools available for conversion into compressed file formats, such as the Open Source Audio Editor [[http://sourceforge.net/projects/audacity/|Audacity]]. | In order to make sure the audio file is played in all contemporary browsers, it should be present in mp3 __and__ ogg format. However, mp3 alone already provides a decent coverage. There is a number of free tools available for conversion into compressed file formats, such as the Open Source Audio Editor [[http://sourceforge.net/projects/audacity/|Audacity]]. |
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| To embed a file, create a new [[:en:create:texts|Text element]] in **Text Elements and Labels** with //Formatting// “HTML code”, and add the following content: | To embed a file, create a new [[en:create:texts|Text element]] in **Text Elements and Labels** with //Formatting// “HTML code”, and add the following content: |
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| <code html> | <code html> |
| <audio id="audio_with_controls" controls autoplay> | <audio id="audio_with_controls" controls autoplay> |
| <source src="audio.mp3" type="audio/mpeg" /> | <source src="audio.mp3" type="audio/mpeg" /> |
| <source src="audio.ogg" type="audio/ogg" /> | <source src="audio.ogg" type="audio/ogg" /> |
| Your browser is not able to play this audio file | Your browser is not able to play this audio file |
| </audio> | </audio> |
| </code> | </code> |
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| The file name(s) are entered in the ''<source>'' tags, while the options ''controls'' and ''autoplay'' enable controls and automatic playback. For more options, see [[https://wiki.selfhtml.org/wiki/HTML/Multimedia_und_Grafiken/audio|SelfHTML: Audio]] (German only). | The file name(s) are entered in the ''<source>'' tags, while the options ''controls'' and ''autoplay'' enable controls and automatic playback. For more options, see [[https://wiki.selfhtml.org/wiki/HTML/Multimedia_und_Grafiken/audio|SelfHTML: Audio]] (German only). |
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| CSS formatting can be used to either adjust player size or to hide the player entirely. Please keep in mind that some browsers might ignore the autoplay setting, e.g. on mobile devices with limited data usage). | CSS formatting can be used to either adjust player size or to hide the player entirely. Please keep in mind that some browsers might ignore the autoplay setting, e.g. on mobile devices with limited data usage). |
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| <code html> | <code html> |
| <audio id="audio_with_controls" controls style="width: 200px; height: 80px"> | <audio id="audio_with_controls" controls style="width: 200px; height: 80px"> |
| <source src="audio.mp3" type="audio/mpeg" /> | <source src="audio.mp3" type="audio/mpeg" /> |
| </audio> | </audio> |
| </code> | </code> |
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| <code html> | <code html> |
| <audio id="audio_with_controls" controls style="position: absolute; left: -9999px; top: -9999px"> | <audio id="audio_with_controls" controls style="position: absolute; left: -9999px; top: -9999px"> |
| <source src="audio.mp3" type="audio/mpeg" /> | <source src="audio.mp3" type="audio/mpeg" /> |
| </audio> | </audio> |
| </code> | </code> |
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| ====Embedding videos using HTML5==== | ====Embedding videos using HTML5==== |
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| If you want to make sure your video can be displayed correctly for virtually all participants, you can embed it in your questionnaire using the HTML5 ''<video>'' tag. A disadvantage is that you first need to convert the video into 3 (!) different formats, and consequently also need to upload three files. Basically, you can also use just one of the file formats, but this way the video will only play in some browsers ([[http://www.hongkiat.com/blog/html5-videos-things-you-need-to-know/|HTML5 Videos: 10 Things Designers Need to Know]]). | If you want to make sure your video can be displayed correctly for virtually all participants, you can embed it in your questionnaire using the HTML5 ''<video>'' tag. A disadvantage is that you first need to convert the video into 3 (!) different formats, and consequently also need to upload three files. Basically, you can also use just one of the file formats, but this way the video will only play in some browsers ([[http://www.hongkiat.com/blog/html5-videos-things-you-need-to-know/|HTML5 Videos: 10 Things Designers Need to Know]]). |
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| **Important:** Very outdated versions of Internet Explorer (up to version 8) do not support the ''<video>'' tag. E.g. for Germany, this would affect about 3% of internet users ([[http://caniuse.com/#feat=video|Can I use: Video element]]). | **Important:** Very outdated versions of Internet Explorer (up to version 8) do not support the ''<video>'' tag. E.g. for Germany, this would affect about 3% of internet users ([[http://caniuse.com/#feat=video|Can I use: Video element]]). |
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| To convert your video file into the file formats mp4, ogg, and webm, you can use a number of tools. It can be done quite conveniently using [[https://cloudconvert.com/|CloudConvert]] (online), and the [[http://www.videolan.org/vlc/|VLC Media Player]] (offline) can also be used for this purpose. To do so with VLC, do the following (instructions based on [[http://klaesimage.com/wordpress/?p=265|Using VLC Media Player to convert video]]): | To convert your video file into the file formats mp4, ogg, and webm, you can use a number of tools. It can be done quite conveniently using [[https://cloudconvert.com/|CloudConvert]] (online), and the |
| | [[http://www.videolan.org/vlc/|VLC Media Player]] (offline) can also be used for this purpose. To |
| | do so with VLC, do the following (instructions based on [[http://klaesimage.com/wordpress/?p=265|Using VLC Media Player to convert video]]): |
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| * Open VLC Media Player | * Open VLC Media Player |
| This procedure is repeated using the profiles “Video - VP80 + Vorbis (WebM)” -> file extension “.webm”, and “Video - Theora + Vorbis (OGG)” -> file extension “.ogg”. Once the files have been encoded, open the new video files in order to check video and audio quality. | This procedure is repeated using the profiles “Video - VP80 + Vorbis (WebM)” -> file extension “.webm”, and “Video - Theora + Vorbis (OGG)” -> file extension “.ogg”. Once the files have been encoded, open the new video files in order to check video and audio quality. |
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| In SoSci Survey, you create a new [[:en:create:texts|Text element]] in **Text Elements and Labels** with //Formatting// “HTML code”, and add the following content: | In SoSci Survey, you create a new [[:en:create:texts|Text element]] in **Text Elements and Labels** with //Formatting// “HTML code”, and add the following content: |
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| <code html> | <code html> |
| <video width="512" height="288" controls> | <video width="512" height="288" controls> |
| <source src="filename.ogg" type="video/ogg" /> | <source src="filename.ogg" type="video/ogg" /> |
| <source src="filename.mp4" type="video/mp4" /> | <source src="filename.mp4" type="video/mp4" /> |
| <source src="filename.webm" type="video/webm" /> | <source src="filename.webm" type="video/webm" /> |
| </video> | </video> |
| </code> | </code> |
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| Obviously, you can use the ''width'' and ''height'' parameters to adjust the video’s display size. Additional options are available to enable autoplay or hide the player controls ([[http://wiki.selfhtml.org/wiki/HTML/Multimedia_und_Grafiken/video|SelfHTML: HTML/Multimedia und Grafiken/video]] (German only)). | Obviously, you can use the ''width'' and ''height'' parameters to adjust the video’s display size. Additional options are available to enable autoplay or hide the player controls ([[http://wiki.selfhtml.org/wiki/HTML/Multimedia_und_Grafiken/Video|SelfHTML: HTML/Multimedia und Grafiken/video]] (German only)). |
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| ====Embedding videos using Flash==== | ====Embedding videos using Flash==== |
| While video embedding using Flash has been the means of choice until just a few years ago, this solution now faces two major challenges: first, it does not work on iPhone/iPad, and second, the browser’s flash plug-in is frequently deactivated due to security concerns. | While video embedding using Flash has been the means of choice until just a few years ago, this solution now faces two major challenges: first, it does not work on iPhone/iPad, and second, the browser’s flash plug-in is frequently deactivated due to security concerns. |
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| To convert your video into a flash video file, a helpful tool is the [[http://www.dvdvideosoft.com/products/dvd/Free-Video-to-Flash-Converter.htm|Free Video to Flash Converter]]. When installing this tool, the suggested toolbars can be deactivated/not installed, and the same applies to the included add-on software (e.g. TuneUp Utilities). The programme helps the user turn videos into Flash videos and to play them via the Internet: | To convert your video into a flash video file, a helpful tool is the [[http://www.dvdvideosoft.com/products/dvd/Free-Video-to-Flash-Converter.htm|Free Video to Flash Converter]]. |
| | When installing this tool, the suggested toolbars can be deactivated/not installed, and the same applies to the included add-on software (e.g. TuneUp Utilities). The programme helps the user turn videos into Flash videos and to play them via the Internet: |
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| - Start the application | - Start the application |
| The converter will save the Flash video (FLV) and the actual player to play the video (SWF file) in the target directory. In some cases a control file (XML) is included as well. The two or three output files should be uploaded to the survey project – an eventual HTML or CSS file in the target directory does not need to be uploaded. The video file size (FLV) may not exceed 64 MB on the www.soscisurvey.de server. | The converter will save the Flash video (FLV) and the actual player to play the video (SWF file) in the target directory. In some cases a control file (XML) is included as well. The two or three output files should be uploaded to the survey project – an eventual HTML or CSS file in the target directory does not need to be uploaded. The video file size (FLV) may not exceed 64 MB on the www.soscisurvey.de server. |
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| **Important:** In newer versions of the Free Video to Flash Converter, output may differ significantly from the results described in this manual. In this case, some adjustments need to be done (see the (German) support forum: [[http://forum.onlineforschung.org/viewtopic.php?p=25362#p25362|Support forum: Embedding flash video]]). | **Important:** In newer versions of the Free Video to Flash Converter, output may differ significantly from the results described in this manual. In this case, some adjustments need to be done (see the (German) support forum: [[http://forum.onlineforschung.org/viewtopic.php?p=25362#p25362|Support forum: Embedding flash video]]). |
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| After converting the video, a browser window with the necessary HTML code will open (if this window is closed by the user, it can be re-opened from the HTML file saved to the target directory by the programme). The relevant code is under //Copy the code from the box below to your web page//, and the ''<noscript>'' line can be adjusted as necessary -– it is displayed when JavaScript is deactivated and the video can’t be shown (see example below). | After converting the video, a browser window with the necessary HTML code will open (if this window is closed by the user, it can be re-opened from the HTML file saved to the target directory by the programme). The relevant code is under //Copy the code from the box below to your web page//, and the ''<noscript>'' line can be adjusted as necessary -– it is displayed when JavaScript is deactivated and the video can’t be shown (see example below). |
