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• How to do precise frame cut with ffmpeg ?

  25 juillet 2020, par Menglun Li

  I tried to cut multiple big videos into many small pieces. I know I can cut and export the small pieces one by one with "Premiere Elements", however that takes a lot time to export them manually. I couldn't find a way to do batch export in "Premiere Elements".

  


  I wrote down the starting and ending points of the small videos from Premiere Elements' timeline viewer, then I created a batch file to use ffmpeg for batch cutting. Below is one of the cutting command in the batch file.

  


  ffmpeg -i input.mp4 -ss 00:20:45.09 -to 00:23:01.00 -c:v libx264 -c:a aac output5.mp4 


  


  I compared the video that was cut by ffmpeg and the video was exported by Premiere Elements. I found sometime they are not starting and ending at the same frame, and it is not consistent either. Both the starting and ending frame that was cut by ffmpeg can drift forward or backward 6-9 frames from the frame number showed in Premiere Elements.

  


  How do I make sure ffmpeg has the precise frame cut ? Thanks in advance.

  


• Wowza : Live stream detected but does not play

  2 septembre 2016, par searcot jabali

  This is the command I use to being the stream on my hardware device
  ffmpeg -i /dev/video0 -f rtsp rtsp ://[user] :[password]@52.66.64.136:1935/test/myStream

  I can see that there is an input coming in from the Incoming Streams section of the Wowza Engine Manager.
  The IP, Stream name & Application name are correct.
  

  However when I try to play the stream using the Test Players, I dont see anything. Just a black screen.
  An error message at the bottom of Adobe HDS says Source stream or file could not be found or access was denied.

  

  When I try to use the RTSP wowza link on VLC I get an error stating that the "Input Cannot Be opened"

  Source security for RTSP has been set to open.

  When I stream through the GoCoder App there are no issues.
  This leads me to believe the server is functioning correctly.

  When I use the same command but change the output to write to file (ffmpeg -i /dev/video0 out.mp4) it works perfectly fine !!
  So even the base command is correct.

  Am I missing some arguments from the FFMPEG command ?
  Do I need to provide the username & password even though RTSP Source Security has been set to open ?

• Find out what people are searching when coming from search engines

  7 novembre 2017, par InnoCraft — Plugins

  At InnoCraft, we know that SEO is an important topic for most of you. If you have not heard of this term before, SEO stands for Search Engine Optimization. It consists in having your content website visible within the search result pages without paying for ads. SEO is also often referred as “natural” or “organic” traffic.

  In SEO, one of the most valuable data to analyze is the keyword used by the visitor to come to your website. Since 2011, major search engines decided to not disclose this data anymore, that’s the reason why you are seeing the “Keyword not defined” data within some of your Piwik reports, also called “not provided” :

  

  Keyword not defined in Piwik

  The solution

  As your keyword data is collected by search engines, each of them provides the searched keywords within different services such as :

  • Google Search Console
  • Bing/Yahoo Webmaster tools
  • Yandex Webmaster

  Those services allow website owners to see how many times their website appeared within the SERP (Search Engine Results Page), how bots are crawling your pages, which search terms they used, and more. The drawback is, that they make take this data available only for a short period, you need to log in to all these services to get the insights you need and you cannot get aggregated overall keyword reports (over all search engines combined).

  The solution that gives you all this data in Piwik

  Would you like to know what the not defined search keywords in Piwik really are ? Would you like to combine keywords data from major search engines in one place ? Would you like to know how important your website is according to Google and Microsoft Bing and Yahoo ?

  At InnoCraft, the company behind Piwik, we created a plugin called “Search Engine Performance Keywords”. With this plugin, you will :

  1. be able to keep the search terms forever
  2. save time by crossing data from Google and Bing search within Piwik
  3. get an overview of how Google and Bing are crawling your site
  4. monitor search rankings and click-through rates for each keyword

  1 – Data ownership & data retention

  Once more, it is going back to Piwik roots. As Piwik is a Free software, you own the data you collect. Once the import is successful, you will be able to keep the keywords data as long as you wish. In the case of services such as Google Search Console, they will delete the data after 90 days !! Without our plugin you will not be able to analyze precisely how your SEO is doing month by month, year by year.

  2 – Save time by using a single interface

  Google and Bing have no interest in gathering data coming from various search engines… we do. As a result, with our plugin you can visualize the data coming from those two sources within a single report in order to analyze your SEO in a better way.
  You will not have to use spreadsheets anymore and no chance to miss some important keywords which you would maybe miss when you don’t aggregate them in a single report.

  

  3 – Crawl overview check

  Both Google and Bing have a crawl “budget”. This budget needs to be optimized in order for search engine bots to consider the most relevant pages. By gathering all the data within Piwik you will have a clear view of how well your website is appreciated by search engines :

  

  4 – Monitor search rankings

  The Search Engine Keywords Performance feature allows you to monitor search rankings for a given keyword and see his evolution :

  

  it also gives you the possibility to compare the performances of several keywords in order to see how your website is performing as a whole :

  

  How to get started ?

  The “Search Engine Keywords Performance” plugin has been developed by the InnoCraft team as a premium feature.

  Get Search Engine Keywords Performance on the Marketplace

  If you are not sure, note that InnoCraft is offering an unconditional and hassle-free 30-day money back guarantee period.

  Once you have installed the plugin, follow the guide in order to have it up and running.
  The installation process is not difficult in itself but takes some time as it requires to access to Google and Bing APIs.

  If you enjoyed this article, you may appreciate the following one about how to integrate ad services to Piwik : Make better online marketing decisions with the AOM plugin.