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• Attribution Tracking (What It Is and How It Works)

  23 février 2024, par Erin

  Facebook, TikTok, Google, email, display ads — which one is best to grow your business ? There’s one proven way to figure it out : attribution tracking.

  Marketing attribution allows you to see which channels are producing the best results for your marketing campaigns.

  In this guide, we’ll show you what attribution tracking is, why it’s important and how you can leverage it to accelerate your marketing success.

  What is attribution tracking ?

  By 2026, the global digital marketing industry is projected to reach $786.2 billion.

  With nearly three-quarters of a trillion U.S. dollars being poured into digital marketing every year, there’s no doubt it dominates traditional marketing.

  The question is, though, how do you know which digital channels to use ?

  By measuring your marketing efforts with attribution tracking.

  

  So, what is attribution tracking ?

  Attribution tracking is where you use software to keep track of different channels and campaign efforts to determine which channel you should attribute conversion to.

  In other words, you can (and should) use attribution tracking to analyse which channels are pushing the needle and which ones aren’t.

  By tracking your marketing efforts, you’ll be able to accurately measure the scale of impact each of your channels, campaigns and touchpoints have on a customer’s purchasing decision.

  If you don’t track your attribution, you’ll end up blindly pouring time, money, and effort into activities that may or may not be helpful.

  Attribution tracking simply gives you insight into what you’re doing right as a marketer — and what you’re doing wrong.

  By understanding which efforts and channels are driving conversions and revenue, you’ll be able to properly allocate resources toward winning channels to double down on growth.

  Matomo lets you track attribution across various channels. Whether you’re looking to track your conversions through organic, referral websites, campaigns, direct traffic, or social media, you can see all your conversions in one place.

  Try Matomo for Free

  Get the web insights you need, without compromising data accuracy.

  Start for free

  No credit card required

  Why attribution tracking is important

  Attribution tracking is crucial to succeed with your marketing since it shows you your most valuable channels.

  It takes the guesswork out of your efforts.

  You don’t need to scratch your head wondering what made your campaigns a success (or a failure).

  While most tools show you last click attribution by default, using attribution tracking, or marketing attribution, you can track revenue and conversions for each touchpoint.

  For example, a Facebook ad might have no led to a conversion immediately. But, maybe the visitor returned to your website two weeks later through your email campaign. Attribution tracking will give credit over longer periods of time to see the bigger picture of how your marketing channels are impacting your overall performance.

  Here are five reasons you need to be using attribution tracking in your business today :

  

  1. Measure channel performance

  The most obvious way attribution tracking helps is to show you how well each channel performs.

  When you’re using a variety of marketing channels to reach your audience, you have to know what’s actually doing well (and what’s not).

  This means having clarity on the performance of your :

  • Emails
  • Google Ads
  • Facebook Ads
  • Social media marketing
  • Search engine optimisation (SEO)
  • And more

  Attribution tracking allows you to measure each channel’s ROI and identify how much each channel impacted your campaigns.

  It gives you a more accurate picture of the performance of each channel and each campaign.

  With it, you can easily break down your channels by how much they drove sales, conversions, signups, or other actions.

  With this information, you can then understand where to further allocate your resources to fuel growth.

  2. See campaign performance over longer periods of time

  When you start tracking your channel performance with attribution tracking, you’ll gain new insights into how well your channels and campaigns are performing.

  The best part — you don’t just get to see recent performance.

  You get to track your campaign results over weeks or months.

  For example, if someone found you through Google by searching a question that your blog had an answer to, but they didn’t convert, your traditional tracking strategy would discount SEO.

  But, if that same person clicked a TikTok ad you placed three weeks later, came back, and converted — SEO would receive some attribution on the conversion.

  Using an attribution tracking tool like Matomo can help paint a holistic view of how your marketing is really doing from channel to channel over the long run.

  Try Matomo for Free

  Get the web insights you need, without compromising data accuracy.

  Start for free

  No credit card required

  3. Increase revenue

  Attribution tracking has one incredible benefit for marketers : optimised marketing spend.

  When you begin looking at how well your campaigns and your channels are performing, you’ll start to see what’s working.

  Attribution tracking gives you clarity into the performance of campaigns since it’s not just looking at the first time someone clicks through to your site. It’s looking at every touchpoint a customer made along the way to a conversion.

  By understanding what channels are most effective, you can pour more resources like time, money and labour into those effective channels.

  By doubling down on the winning channels, you’ll be able to grow like never before.

  Rather than trying to “diversify” your marketing efforts, lean into what’s working.

  This is one of the key strategies of an effective marketer to maximise your campaign returns and experience long-term success in terms of revenue.

  4. Improve profit margins

  The final benefit to attribution tracking is simple : you’ll earn more profit.

  Think about it this way : let’s say you’re putting 50% of your marketing spend into Facebook ads and 50% of your spend into email marketing.

  You do this for one year, allocating $500,000 to Facebook and $500,000 to email.

  Then, you start tracking attribution.

  You find that your Facebook ads are generating $900,000 in revenue. 

  That’s a 1,800% return on your investment.

  Not bad, right ?

  Well, after tracking your attribution, you see what your email revenue is.

  In the past year, you generated $1.7 million in email revenue.

  That’s a 3,400% return on your investment (close to the average return of email marketing across all industries).

  In this scenario, you can see that you’re getting nearly twice as much of a return on your marketing spend with email.

  So, the following year, you decide to go for a 75/25 split.

  Instead of putting $500,000 into both email and Facebook ads and email, you put $750,000 into email and $250,000 into Facebook ads.

  You’re still diversifying, but you’re doubling down on what’s working best.

  The result is that you’ll be able to get more revenue by investing the same amount of money, leaving you with higher profit margins.

  Different types of marketing attribution tracking

  There are several types of attribution tracking models in marketing.

  Depending on your goals, your business and your preferred method, there are a variety of types of attribution tracking you can use.

  Here are the six main types of attribution tracking :

  

  1. Last interaction

  Last interaction attribution model is also called “last touch.”

  It’s one of the most common types of attribution. The way it works is to give 100% of the credit to the final channel a customer interacted with before they converted into a customer.

  This could be through a paid ad, direct traffic, or organic search.

  One potential drawback of last interaction is that it doesn’t factor in other channels that may have assisted in the conversion. However, this model can work really well depending on the business.

  2. First interaction

  This is the opposite of the previous model.

  First interaction, or “first touch,” is all about the first interaction a customer has with your brand.

  It gives 100% of the credit to the channel (i.e. a link clicked from a social media post). And it doesn’t report or attribute anything else to another channel that someone may have interacted with in your marketing mix.

  For example, it won’t attribute the conversion or revenue if the visitor then clicked on an Instagram ad and converted. All credit would be given to the first touch which in this case would be the social media post. 

  The first interaction is a good model to use at the top of your funnel to help establish which channels are bringing leads in from outside your audience.

  3. Last non-direct

  Another model is called the last non-direct attribution model. 

  This model seeks to exclude direct traffic and assigns 100% credit for a conversion to the final channel a customer interacted with before becoming a customer, excluding clicks from direct traffic.

  For instance, if someone first comes to your website from an emai campaignl, and then, a week later, directly visits and buys a product, the email campaign gets all the credit for the sale.

  This attribution model tells a bit more about the whole sales process, shedding some more light on what other channels may have influenced the purchase decision.

  4. Linear

  Another common attribution model is linear.

  This model distributes completely equal credit across every single touchpoint (that’s tracked). 

  Imagine someone comes to your website in different ways : first, they find it through a Google search, then they click a link in an email from your campaign the next day, followed by visiting from a Facebook post a few days later, and finally, a week later, they come from a TikTok ad. 

  Here’s how the attribution is divided among these sources :

  • 25% Organic
  • 25% Email
  • 25% Facebook
  • 25% TikTok ad

  This attirubtion model provides a balanced perspective on the contribution of various sources to a user’s journey on your website.

  5. Position-based

  Position-based attribution is when you give 40% credit to both the first and last touchpoints and 20% credit is spread between the touchpoints in between.

  This model is preferred if you want to identify the initial touchpoint that kickstarted a conversion journey and the final touchpoint that sealed the deal.

  The downside is that you don’t gain much insight into the middle of the customer journey, which can make it hard to make effective decisions.

  For example, someone may have been interacting with your email newsletter for seven weeks, which allowed them to be nurtured and build a relationship with you.

  But that relationship and trust-building effort will be overlooked by the blog post that brought them in and the social media ad that eventually converted them.

  6. Time decay

  The final attribution model is called time decay attribution.

  This is all about giving credit based on the timing of the interactions someone had with your brand.

  For example, the touchpoints that just preceded the sale get the highest score, while the first touchpoints get the lowest score.

  For example, let’s use that scenario from above with the linear model :

  • 25% SEO
  • 25% Email
  • 25% Facebook ad
  • 25% Organic TikTok

  But, instead of splitting credit by 25% to each channel, you weigh the ones closer to the sale with more credit.

  Instead, time decay may look at these same channels like this :

  • 5% SEO (6 weeks ago)
  • 20% Email (3 weeks ago)
  • 30% Facebook ad (1 week ago)
  • 45% Organic TikTok (2 days ago)

  One downside is that it underestimates brand awareness campaigns. And, if you have longer sales cycles, it also isn’t the most accurate, as mid-stage nurturing and relationship building are underlooked. 

  Leverage Matomo : A marketing attribution tool

  Attribution tracking is a crucial part of leading an effective marketing strategy.

  But it’s impossible to do this without the right tools.

  A marketing attribution tool can give you insights into your best-performing channels automatically. 

  

  One of the best marketing attribution tools available is Matomo, a web analytics tool that helps you understand what’s going on with your website and different channels in one easy-to-use dashboard.

  With Matomo, you get marketing attribution as a plug-in or within Matomo On-Premise or for free in Matomo Cloud.

  The best part is it’s all done with crystal-clear data. Matomo gives you 100% accurate data since it doesn’t use data sampling on any plans like Google Analytics.

  To start tracking attribution today, try Matomo’s 21-day free trial. No credit card required.

  Try Matomo for Free

  21 day free trial. No credit card required.

  
  

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  Your website address
  

  Your Analytics subdomain will be .matomo.cloud (change)

  Choose your analytics subdomain
  

  .matomo.cloud

  I accept the terms and conditions and data processing agreement (DPA)

  
  Your information will be used to create an account on our cloud service. For more information please consult our privacy policy.
  
  
  

  Start improving your websites now

  

• Multi-Site Management (Quick-Start Guide)

  18 juillet 2024, par Erin

  Do you run multiple websites ?

  Or, you’re expanding from one to two sites ?

  Multi-site management isn’t an easy task.

  While there are dozens of reasons why you may need to operate several sites, like brick and mortar stores opening new locations in different regions, you need to ensure you’re following the right strategies so you remain successful.

  So, how do you actually manage multiple websites at the same time without spreading yourself thin ?

  Using a single dashboard.

  In this guide, we’ll cover everything you need to know about managing multiple sites in a single location at once so you can lead a successful digital strategy.

  What is multi-site management ?

  Multi-site management is the process of organising and operating multiple websites from a single location. It helps with congruent branding and improved productivity.

  Enterprise businesses that use multiple, language-specific versions of their site to target their audience in specific countries or regions can also benefit from managing their multiple sites from a single location. 

  

  By analysing a few websites at once, marketers and analysts can oversee a few different business websites without having to switch between multiple platforms and technologies.

  Whatever the reason is for managing multiple sites, multi-site management helps marketers and analysts establish a consistent brand presence, improve workflow efficiencies and scale operations.

  7 Benefits of multi-site management

  Multi-site management allows you to navigate and control a few websites all in one centralised location.

  

  Here are a few of the main benefits of multi-site management :

  1. Save time by reusing code between websites

  Saving time is the main benefit of multi-site management. Rather than managing websites from multiple platforms, logins and infrastructures, you can manage everything from one place.

  Multi-site management allows you to easily reuse core code, infrastructure and other digital assets from other sites all within one dashboard.

  So, when you need to update all of your websites, you can do it all at once in a fraction of the time.

  2. Improve productivity by having everything in one place

  How many tools do you currently use for your job on a daily basis ?

  Five ? Ten ?

  Now, imagine adding on another handful of tools, logins and technology for every site you manage.

  It’s a lot, especially if you’re managing dozens of logins, usernames and passwords.

  With multi-site management, you don’t need to have multiple login credentials. Everything’s all in one place and within one system.

  You don’t need to switch between multiple tools and platforms to get things done.

  The same strategy applies to your web analytics. If you want to streamline your productivity, make sure you’re tracking all of the data from your different websites in one place. Matomo lets you track multiple sites, domains and subdomains in one centralised location with the ‘All Websites’ dashboard which is a roll-up report. This is ideal for enterprises managing and analysing numerous sites.

  Try Matomo for Free

  Get the web insights you need, without compromising data accuracy.

  Start for free

  No credit card required

  3. Maintain brand image with consistent design across sites

  If you have multiple websites, subsidiaries or sister companies, it can take a great deal of effort to maintain branding consistency.

  But, if you’re leveraging a multi-site content management system, you can update your branding and design between all sites at the same time.

  If you need to make a change with your design, you don’t need to update each individual site with your new initiative. Instead, you can update multiple sites at once, allowing your visual branding to stay congruent, giving you uniformity in messaging.

  The result is an optimised user experience, which helps you increase trust with your audience, improve engagement and keep them coming back for years to come.

  4. Increase security through centralised management

  The greater your digital presence is, the more you can reach a wider range of people.

  But, there’s one downside : you expose yourself to more risk.

  Keeping multiple websites secure isn’t as easy to do if you’re leveraging dozens of different platforms and logins. 

  Instead, when you have all of your websites in one location, it can help you easily track every document. You can also control site versions for easy updates to prevent malicious attacks.

  5. Optimise scalability and flexibility

  If you plan on scaling your companies and digital presence, you need to ensure you’re able to do so without having to tear down your entire infrastructure or spend a ton of money upfront.

  For enterprise companies, multi-site management allows you to easily launch new regional sites as your company expands.

  Plus, if you have new product or marketing campaigns, you can simply add on microsites as needed by simply adding it to your current website lineup.

  This allows you to stay flexible in your marketing and growth strategies without adding extra risk or financial burden.

  6. Improve targeting and personalisation in marketing

  If you want to reach your audience better, but you’re managing multiple websites, it can be hard to not spread yourself too thin.

  But, if you’re managing a few websites in one place, it’s easier to track your audience’s interests, behaviour, wants and needs.

  By using a web analytics tool like Matomo to track the performance of multiple websites, you can see what’s resonating with your audience so you’re able to improve your targeting and offer personalised campaigns.

  Try Matomo for Free

  Get the web insights you need, without compromising data accuracy.

  Start for free

  No credit card required

  7. Streamline collaboration between team members

  Making your team juggle multiple platforms, websites and tools is a surefire way to give them a headache.

  Multi-site management is one of the best ways to bring your entire team into one centralised location so you can foster seamless collaboration without leaving your team confused or frustrated.

  By placing your entire website management in one place, markters, designers, developers, writers and other team members can collaborate effectively so you can get more done in less time.

  With multi-site management, you bring your entire team into a single location to work on your websites so you can speed up your content creation process, speed up problem solving and streamline communication.

  6 Best practices of multi-site management

  When you have multiple websites, you can expand your brand presence. But, one main problem arises : it becomes overwhelming for anyone managing them.

  Since each website comes with its own platform, login credentials and assets, it becomes incredibly difficult for developers, marketers and others to maintain the sites. And, if your sites aren’t looked after properly, you could end up with technical issues and branding inconsistencies, causing you to lose conversions and negatively impact the user experience.

  Thankfully, multi-site management can help you streamline your efforts, improve productivity and scale your business.

  But, before you dive into your multi-site management process, you need to ensure you implement the right strategy.

  

  Here are a few best practices to follow to succeed with multi-site management :

  1. Use a multi-site CMS

  If you want to manage multiple websites, you need to make sure you’re leveraging a CMS that offers multi-site management capabilities.

  A multi-site CMS allows you to make simple content, design or management changes simultaneously without having to switch between different systems.

  Here are a few examples of CMS’ that offer multi-site management :

  • WordPress
  • Sanity
  • Drupal

  2. Integrate a headless CMS

  One of the most versatile types of content management systems is what’s known as a “headless CMS.”

  This is a CMS that lets you disconnect the front end from the back end of your website management.

  Here are a few examples of headless (and open source) CMS’ :

  • Strapi
  • Directus
  • Ghost

  A headless CMS can help you add versatility in the way you present content across multiple sites. It uses an API to give you more flexibility so you can push content to websites as well as apps, etc.

  Using a headless CMS can help you improve page load times, website performance and user experience by simplifying your tech stack.

  3. Implement cross-domain and mult-isite Matomo analytics tracking

  If you want to track the website analytics data of multiple sites, you need to implement cross-domain tracking.

  The best way to do this is by leveraging a web analytics solution like Matomo. It lets you track the performance of multiple subdomains or websites.

  With Matomo, you get easy data grouping and data roll-up reporting for streamlined tracking.

  

  This means you can track the individual performance of each site or group them together to see the shared performance.

  4. Enable multiuser management

  If you’re working with different team members who need access to your CMS, then you should consider enabling multiuser management.

  This allows several people to work within your multi-site CMS and also gives you the ability to grant or restrict access to certain abilities within the platform.

  This is handy if you have a few different stakeholders working in your CMS.

  By enabling different user permissions and access, you can improve the security of your website and protect sensitive company information.

  5. Leverage composable content

  Creating a few different websites is a great way to increase your brand reach. But, it can be time-consuming having to continuously create and update content within multiple sites.

  That’s where composable content comes in.

  It allows you to create similar content between sites using pre-made “blocks.” Content blocks act as templates so you can quickly add similar content pieces to each site without having to start over from scratch each time.

  This speeds up productivity for your designers, writers and editors and keeps brand image consistent across different sites.

  6. Use version control

  What happens if you update all of your websites with a redesign, but it flops ?

  Well, rather than having to tear it all down and redesign your site infrastructure, you can leverage version control to restore your website to a previous version.

  Version control is especially handy when you’re managing multiple sites at once and you have multiple team members working in your CMS.

  Version control is also helpful if you’re A/B testing different content. By saving previous versions of your websites, you can run tests to help you optimise your web performance. 

  For example, if you use Matomo’s A/B testing feature to experiment with different landing page designs for a lead magnet, but find that your previous version performed better, you can simply restore your websites to a previous version in seconds.

  Track web analytics for multiple websites with Matomo

  If you’re looking to expand your digital presence, then creating new websites is one of the best ways to grow your brand.

  Multi-site management can help you save time, improve productivity and maintain a consistent brand image across your empire.

  One challenge of multi-site management is tracking the performance of your websites.

  That’s where Matomo has you covered.

  Matomo is a privacy-friendly web analytics tool that collects, stores, and tracks data across multiple websites and subdomains, allowing you to improve your performance. 

  With over 1 million websites using Matomo, you can rely on it for accurate data without sampling, ensuring compliance with privacy regulations like GDPR and CCPA. 

  Matomo is especially beneficial for enterprises. It offers advanced roll-up reporting, enabling you to see the performance of multiple websites in one centralised dashboard. This feature, along with heatmaps, session recordings, and A/B testing, provides deeper insights into your website performance.

  Discover how Matomo can transform your web analytics with a demo. Request your demo now.

  Try Matomo for Free

  21 day free trial. No credit card required.

  
  

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• FFmpeg -ss parameter is the video duration, Output file is empty

  16 avril 2024, par noun nil

  The main function is to obtain the corresponding video frame based on the input seconds.Before processing, the duration of the video will be obtained to determine whether the input is within the duration range of the video. If so, the corresponding instruction will be executed.

  


  > ffprobe input.mp4
  ...
  Duration: 00:00:28.05, start: 0.000000, bitrate: 1136 kb/s


  


  > ffmpeg -ss 00:00:28 -i input.mp4 -frames:v 1 output.png
 ffmpeg version 7.0 Copyright (c) 2000-2024 the FFmpeg developers
  built with Apple clang version 15.0.0 (clang-1500.3.9.4)
  configuration: --prefix=/opt/homebrew/Cellar/ffmpeg/7.0 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags='-Wl,-ld_classic' --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libaribb24 --enable-libbluray --enable-libdav1d --enable-libharfbuzz --enable-libjxl --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librist --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopenvino --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox --enable-audiotoolbox --enable-neon
  libavutil      59.  8.100 / 59.  8.100
  libavcodec     61.  3.100 / 61.  3.100
  libavformat    61.  1.100 / 61.  1.100
  libavdevice    61.  1.100 / 61.  1.100
  libavfilter    10.  1.100 / 10.  1.100
  libswscale      8.  1.100 /  8.  1.100
  libswresample   5.  1.100 /  5.  1.100
  libpostproc    58.  1.100 / 58.  1.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.29.100
    description     : Packed by Bilibili XCoder v2.0.2
  Duration: 00:00:28.05, start: 0.000000, bitrate: 1136 kb/s
  Stream #0:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 720x1280 [SAR 1:1 DAR 9:16], 1005 kb/s, 25.27 fps, 25.25 tbr, 16k tbn (default)
      Metadata:
        handler_name    : VideoHandler
        vendor_id       : [0][0][0][0]
  Stream #0:1[0x2](und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
      Metadata:
        handler_name    : SoundHandler
        vendor_id       : [0][0][0][0]
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> png (native))
Press [q] to stop, [?] for help
[swscaler @ 0x1187a0000] [swscaler @ 0x110e48000] No accelerated colorspace conversion found from yuv420p to rgb24.
[swscaler @ 0x1187a0000] [swscaler @ 0x110e58000] No accelerated colorspace conversion found from yuv420p to rgb24.
[swscaler @ 0x1187a0000] [swscaler @ 0x110e68000] No accelerated colorspace conversion found from yuv420p to rgb24.
[swscaler @ 0x1187a0000] [swscaler @ 0x110e78000] No accelerated colorspace conversion found from yuv420p to rgb24.
[swscaler @ 0x1187a0000] [swscaler @ 0x110e88000] No accelerated colorspace conversion found from yuv420p to rgb24.
[swscaler @ 0x1187a0000] [swscaler @ 0x110e98000] No accelerated colorspace conversion found from yuv420p to rgb24.
[swscaler @ 0x1187a0000] [swscaler @ 0x110ea8000] No accelerated colorspace conversion found from yuv420p to rgb24.
[swscaler @ 0x1187a0000] [swscaler @ 0x110eb8000] No accelerated colorspace conversion found from yuv420p to rgb24.
[swscaler @ 0x1187a0000] [swscaler @ 0x110ec8000] No accelerated colorspace conversion found from yuv420p to rgb24.
[vost#0:0/png @ 0x12ce06840] No filtered frames for output stream, trying to initialize anyway.
Output #0, image2, to 'output.png':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    description     : Packed by Bilibili XCoder v2.0.2
    encoder         : Lavf61.1.100
  Stream #0:0(und): Video: png, rgb24(progressive), 720x1280 [SAR 1:1 DAR 9:16], q=2-31, 200 kb/s, 25.25 fps, 16k tbn (default)
      Metadata:
        handler_name    : VideoHandler
        vendor_id       : [0][0][0][0]
        encoder         : Lavc61.3.100 png
[out#0/image2 @ 0x600000e983c0] video:0KiB audio:0KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: unknown
[out#0/image2 @ 0x600000e983c0] Output file is empty, nothing was encoded(check -ss / -t / -frames parameters if used)
frame=    0 fps=0.0 q=0.0 Lsize=N/A time=N/A bitrate=N/A speed=N/A    



  


  -ss 00:00:28 within the video duration range, but still cannot obtain frames...

  


  -ss 00:00:27 Can obtain video frames