Month: August 2021

  • PC Windows 10 is very slow although CPU, RAM, GPU and Disk usage is low

    There are many many reasons why a PC can be lagging and very slow. But the worst was is when you look at the Task Manager and you see that both CPU and GPU are low, there are still plenty of free RAM and there is no high disk activity. In my case the problem was due to CPU Frequency being reduced.

    Click to Read More

    First thing to check, the CPU/GPU/Ram and Disk Usage. Press CTRL-SHIFT-ESC to open the Task Manager.

    You see that everything is low. So what ?

    Run now the Resource Monitor by pressing Windows-R and typing: resmon

    Very interesting. We see that the CPU runs at 19% of its maximum Frequency. So, something has reduced the CPU frequency. Indeed, with Intel speedstep, power saving and everything else disabled, this should always read 100%.

    So, the problem can be the “power plan” or some “failed” overclocking…

    You can test this by adding some load on the CPU with “CPU Grab” or “CPU Stres“. Here under, using CPU Grab to load the CPU at 100%, we can see that the CPU is still limited to ~20%:

    NB.: You can also give a try to Intel® Extreme Tuning Utility

    Regarding SpeedStep and Power Saving, you can edit your Power Plan Option. Press Windows-R and enter: powercfg.cpl, then click “Change plan settings” > “Change advanced power settings”. Set all limits to 100%.

    NB.: For laptop, there are distinct settings “On Battery” or “Plugged in”…

    NB.: Keep the “System cooling policy” on “Active” to avoid your PV to burn 🙂

    If this does not help, then give a try to Throttle Stop (Basically, uncheck the BD PROCHOT checkbox an click Save)


    Possibly, disable manually the Intel Processor Power Management feature (ippm). Run a cmd prompt as Administrator and execute this command before restarting your PC :

    sc config intelppm start=disabled

    NB.: To to re-enable “intelppm”, execute the command

    sc config intelppm start=demand

    Possible values are : {boot | system | auto | demand | disabled | delayed-auto}.


    Also look here for disabling DPTF ( “Intel(R) Dynamic Platform and Thermal Framework”). Windows has it’s own built-in processor speed and thermal management already, which is sufficient on its own.

    Update the drivers of your Processor, pressing Windows-R and typing: devmgmt.msc


    Check the settings in your Bios. If you have an option “CPU Power Management” set on “ENABLED”, Windows will ignore the minimum CPU power setting and clock down to the default frequency but clock up when required. If you have an option “Intel Speed Step Technology” set on “DISABLED” at the same time, the maximum frequency will be that of what it is advertised for your CPU, instead of maximum turbo boost.

    Finally, you can also check your RAM just in case, by pressing Windows+R then and typing in mdsched.exe. Then restart the PC.

    Finally, you should have solved the maximum Frequency:

    NB.: here above, my CPU been overclocked, you see more than 100% CPU available


  • How to download playlists from YouTube using Synology

    It’s really easy to download playlists from YouTube with the Download Station of Synology. I do this to get locally new “No Copyright Music’s”, to be used later within my video’s.

    Click to Read More

    I am using the “Download Station” as it simply works, opposite to many free or paid software’s which pretend to work but usually fail (and are full of advertisements…)

    Bref… Assume that you want to get all the free music’s from the excellent YouTube Channel “VLOG No Copyright“:

    • Visit their “PLAYLISTS” in your Browser (All such channels have a tab “PLAYLISTS” as you can see in the screenshot bellow).
    • Right-click on the link “VIEW FULL PLAYLIST” of the desired playlist.
      • This is important: don’t use any URL from the “HOME” tab or from any tail representing a playlist (with the “PLAY ALL”). It would only download one video and not all the playlist. 
    • Select the menu “Copy link address”
      • The copied url should be like this : “”


    Now, go to your “Synology Download Station” and:

    • Click on the large blue sign “+“. It opens a window to create new download tasks.
    • Go to the tab “Enter URL“.
    • Paste there the URL of the playlist copied previously.
      • A subfolder with the name of the playlist will automatically  be created under the destination folder and the video will be saved in that subfolder
    • Select the option “Show Dialog to select…” if you when to download only some of the video’s. Otherwise you can unselect that option.
    • Click “Ok”.


    You should now see a line as illustrated here below, “waiting” to start:


    You have to wait until the Download Station has crawled across the whole playlist and found all the files to be downloaded… Then, you will see the list of music’s:


    During the download, you could see some failed tasks, with a status “Error”. It happens from time to time, but this is usually a temporary issue. Sort the list within the Download Station on the “Status” column and select all the “Error” . Then, right-click the list and select the menu “Resume”.


    Personally, as soon as the “music video’s” are downloaded, I extract the sound tracks and keep only those. There are many software to do this. But one of my favorite option is to use ffmpeg directly on the Synology (you have to install that package). Simply type this command in a console, in the download path were are saved the video’s: 

    for i in *.mp4; do ffmpeg -i "$i" -codec:a libmp3lame -q:a 0 -map a "${i%.*}.mp3"; done

    To process mp4 in all subfolders in the download path, I use the command:

    for d in *; do cd "$PWD/$d/"; for i in *.mp4; do ffmpeg -i "$i" -codec:a libmp3lame -q:a 0 -map a "${i%.*}.mp3"; done; cd ..; done


    If you are using Chrome, I can suggest some extensions to help in downloading Playlists..

    1. The extension “Copy Selected Links“. Using that one, you can copy the URL’s of all the playlists of a Channel, at once. Select the whole text under the tab PLAYLISTS (it will then appear highlighted in blue as illustrated on the screenshot here under). Next, right-click in an empty area and select the menu “Copy selected Links”.

    Now go into Notepad++, as we have to keep only the playlists. Paste the Clipboard into a new tab of Notepad++. Press CTRL-Home to come back to the top. Press CTRL-H to open the “Replace” window. Select “Regular Expression” at the bottom of that window and click the “Replace All” button once you have entered this into the field “Find What”:  .*watch.*\n (or .*watch.*\r\n if it does not work properly)

    Now, you have two options. If you have no more than 50 playlists, you can paste them directly into the Download Station via the button “+” and the tab “Enter URL” as explained previously. Otherwise, you have to save with all your URL’s into a .txt file (with Notepad++) and upload that file via the tab “Open a file” instead of the tab “Enter URL“. 


    2. The extension “Download Station” (or this version in Chrome Web Store) to more easily download the playlists. Same principle as above, but instead of right-clicking “View Full PlayList” to copy the playlist URL, you now have a extra menu “Synology download Station” (or Download with “Download Station”).


    Another trick, when available in the PLAYLISTS tab of a Channel: select and download the Playlists “Sorted by Mood” or “Sorted by Genre”. This will help you when you search for a particular type of music for your video. Ex.: with the Channel “Audio Library”:


    Adive: each time you add a playlist in the Download Station, check that the amount of new download tasks match with the amount of tracks in the playlist. Indeed, it happens that not all the video’s are added into the Download Station as it has limits(a total of max 2048 download tasks <= reason why you have to clean-up all downloaded tasks before downloading new long playlists. There is also a limit of 256 links per “file” uploaded and a limit for a playlist of “2048 – amount of current download tasks”).

    Don’t forget that for most “No Copyright Music’s”, you have to mention the author in your video’s or posts. Often, in YouTube, you have to click on “Show More” under the video to see the details of the license:

    The License is usually clear. Ex.:

    To find again later the video’s on YouTube and check the type of license, it’s important to keep:

    • The original name of the video when converting into mp3
    • The name of the playlist
    • The name of the channel

    To do so, the easiest is to add some metadata into the mp3 extracted with ffmpeg. Once downloaded by the “Download Station”, your video’s should be in subfolders which have the name of their playlists. And the filenames usually contain the Author, the name of the song and the name of the YouTube Channel. So, it’s easy to create the metadata. Ex.: the playlist “Dance & Electronic Music | Vlog No Copyright Music” of Vlog has been downloaded into a subfolder named “Dance & Electronic Music _ Vlog No Copyright Music” and the video’s are all named like “Artist- Title (Vlog No Copyright Music).mp4”

    So, to process that subfolder, I will use the command:

    for i in *.mp4; do playlist=${PWD##*/}; artist=${i% - *}; other=${i##* - }; title=${other% (Vlog*}; ffmpeg -i "$i" -codec:a libmp3lame -q:a 0 -map a -metadata artist="${artist}" -metadata title="${title}" -metadata album="Playlist: ${playlist}"  -metadata Publisher="From YouTube Channel: Vlog No Copyright" "${artist} - ${title}.mp3"; done

    As you can see, I am using the “Publisher” to store the Channels and the “album” for the playlist… This is a personal choice! (More details on ID3 tags and ffmpeg here)

    Regarding the pattern matching used in shell, it’s not always that simple and you will have to be creative… Just about the pattern matching:

    • variable2=${variable1%xyz*} => variable2 is the shortest left part of variable1 before a substring xyz.
    • variable2=${variable1%%xyz*} => variable2 is the longest left part of variable1 before a substring xyz.
    • variable2=${variable1#*xyz} => variable2 is the shortest right part of variable1 after a substring xyz.
    • variable2=${variable1##*xyz} => variable2 is the longest right part of variable1 after a substring xyz.
    • in xyz, x and z may be blanks (in my case, “xyz” was ” – “)

    As there are many duplicates in those playlists, I have written my own script to replace such duplicates by hardlinks (on my Synology). I can’t use jdupes or rmlint as those are doing “binary comparisons” and due to the conversion via ffmpeg, it doesn’t work. Instead, I search for duplicates based on the filename and size only (per channel, they are usually unique anyway). Here is my script for illustration purpose. It must be stored in an ANSI file (ex.: and run with: sh go

    echo "Start looking for duplicates"

    find . -iname "*.mp3" -printf "%p ~ %f\n" | sort -f -k2 | uniq -Di -f1 > list.dup

    echo "Duplicates found"

    while read p; do
    mp3name="${p#* ~ }"
    mp3path="${p%% ~ *}"
    if [[ "$mp3name" == "$previous" ]]; then
    node=$(ls -l "$mp3path" | grep -Po '^.{11}\s1\s.*$')
    if [[ "$node" == "" ]]; then
    echo " $mp3path is already a hardlink"
    if [[ "$test" == "go" || "$test" == "test" ]]; then
    SIZE1=$(stat -c%s "$mp3path")
    SIZE2=$(stat -c%s "$previouspath")
    #Delta=$(awk "BEGIN{ printf \"%d\n\", sqrt((100 * ($SIZE2 - $SIZE1) / $SIZE1)^2)}")
    #if [[ $Delta > 1 ]]; then
    Delta=$(awk "BEGIN{ printf \"%d\n\", ($SIZE2 - $SIZE1)}")
    if [[ "$Delta" == "0" ]]; then
    mv "$mp3path" "$mp3new.old"
    ln "$previouspath" "$mp3path"
    echo " $mp3path now linked to original"
    echo " $mp3path seems different from $previouspath"
    echo " mv $mp3path $mp3new.old"
    echo " ln $previouspath $mp3path"
    if [[ "$test" != "test" ]] || [[ "$skip" = true ]]; then
    echo "$mp3name has duplicate(s) (original in $mp3path)"
    done <list.dup


    Note: Facebook will possibly remove the audio from your video even if they is a “No Copyright Music”. When you get such a notification from FB, you can simply click to restore the audio if you did mention the Author in your post or video.

    Some YouTube Channels with “No Copyright Music’s”: