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Editorial Team
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Asked: 2026-06-12T07:52:24+00:00

I need to extract the video names from youtube’s index.html. I have been able

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I need to extract the video names from youtube’s index.html. I have been able to break apart the file into small chunks, each containing one video listing, however I cannot seem to extract the video title. My professor has provided the following command, however I cannot seem to get it to work in this situation. 

number=`expr "$s" : ".*\/\([0-9,]*\)\/"`; echo $number # will print 250,4211

Although I’m not completely sure, I think I’m having trouble getting this method to work because there aren’t spaces between the video title and surrounding text. Here is a sample of what I would need to extract the title from:

<li class="video-list-item "><a href="/watch?v=9BbgvlgDQMg&amp;feature=g-sptl&amp;cid=inp-hs-edt" class="video-list-item-link yt-uix-sessionlink" data-sessionlink="ei=CMzmroaB5bICFRiXIQoda3kX5g%3D%3D&amp;feature=g-sptl%26cid%3Dinp-hs-edt" ><span class="ux-thumb-wrap contains-addto "><span class="video-thumb ux-thumb yt-thumb-default-120 "><span class="yt-thumb-clip"><span class="yt-thumb-clip-inner"><img src="http://s.ytimg.com/yt/img/pixel-vfl3z5WfW.gif" alt="Lil&#39; Buck &quot;Golden Gateway&quot; Venice Beach California YAK FILMS Super Bowl 2012 Madonna Memphis Jookin" data-thumb="//i2.ytimg.com/vi/9BbgvlgDQMg/default.jpg" width="120" ><span class="vertical-align"></span></span></span></span><span class="video-time">3:51</span>

Out of this chunk of text, I would need to extract “Lil' Buck "Golden Gateway" Venice Beach California YAK FILMS Super Bowl 2012 Madonna Memphis Jookin“, without the quotes.

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1 Answer

  1. Editorial Team

    You can use the bash regex \<img.*alt=\"([^\"]*)\" to extract the alt text from the img element.

    Example:

    $ cat file
<li class="video-list-item "><a href="/watch?v=9BbgvlgDQMg&amp;feature=g-sptl&amp;cid=inp-hs-edt" class="video-list-item-link yt-uix-sessionlink" data-sessionlink="ei=CMzmroaB5bICFRiXIQoda3kX5g%3D%3D&amp;feature=g-sptl%26cid%3Dinp-hs-edt" ><span class="ux-thumb-wrap contains-addto "><span class="video-thumb ux-thumb yt-thumb-default-120 "><span class="yt-thumb-clip"><span class="yt-thumb-clip-inner"><img src="http://s.ytimg.com/yt/img/pixel-vfl3z5WfW.gif" alt="Lil&#39; Buck &quot;Golden Gateway&quot; Venice Beach California YAK FILMS Super Bowl 2012 Madonna Memphis Jookin" data-thumb="//i2.ytimg.com/vi/9BbgvlgDQMg/default.jpg" width="120" ><span class="vertical-align"></span></span></span></span><span class="video-time">3:51</span>

$ line="$(cat file)"

$ if [[ "$line" =~ \<img.*alt=\"([^\"]*)\" ]]
then
  echo "${BASH_REMATCH[1]}"
fi
Lil&#39; Buck &quot;Golden Gateway&quot; Venice Beach California YAK FILMS Super Bowl 2012 Madonna Memphis Jookin

    Update:

    Using expr:

    $ expr "$line" : '.*<img.*alt=\"\([^\"]*\)\".*'
Lil&#39; Buck &quot;Golden Gateway&quot; Venice Beach California YAK FILMS Super Bowl 2012 Madonna Memphis Jookin
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