Fedora - the hash is in a file called NameofISO-CHECKSUM:
sha256sum -c *CHECKSUM
OpenSuse is similar - the hash is in a file called NameofISO.iso.sha256:
Ubuntu - has sha sums as well as md5sums, so can use
md5sum -c MD5SUMS
also.
Then, writing - for Ubuntu based distros, can use the "make startup disk" tool. If the iso is from a different distro, and it is known to be compatible with usb boot, then something like (after verifying the device name - sdd or whatever - very important!)
Burning in subtitles with VLC needs a bit of tweaking -
1. Media -> Stream, choose the video file. Don't enable the subtitle checkbox on that screen. Click the Stream button.
2. In the Stream Media Wizard, choose the destination as File. Click Add and choose a filename for the destination.
3. In the next Wizard screen, make sure activate transcoding is checked. Click on the settings button, in the subtitles tab, make sure the 'enable subtitles', and 'overlay subtitles on the video' are checked. Codec can remain T.140.
4. In the next screen, in the Generated Stream Output String, we need to edit out (delete) the part of the string which says scodec=t140,
5. Click stream to transcode.
We wanted the F&D smart TVs in our lobby to start up with "last selected input" instead of the Home screen with all the youtube "recommendations" or ads. I tried out Setting -> Common -> System Recovery
In the process of making videos of my morning cycling jaunts, wanted to stabilize the video and also speed it up. Found that Microsoft Hyperlapse Mobile was doing a reasonable job, though it is limited to saving in 720p on my LG Q6 mobile. Very blocky output (probably a low-bitrate codec?) and the video goes blurry once in a while, but stability is good. Compared to kdenlive's vidstab stabilization in the video below.
Bugs and workarounds -
1. My phone doesn't show all the videos all the time, either to Hyperlapse when importing video, or via MTP to Linux Mint 18.1 on USB for taking backups. Workaround, as suggested here, was to just restart the phone.
2. Initially, I was working with kdenlive 15 which came with Linux Mint 18.1, and faced the problem of tooltips being unreadable, having white text on yellow background as mentioned in this post. Then I started using the version 18.12 appimage - that does not have this issue, and also is less prone to random crashes.
3. My equipment is the LG Q6 mobile mounted on the handlebar using a cheap mount from Amazon,
The bracket is not tight enough, and I keep needing to push it up 5-6 times per ride (if the ride is not very smooth) to prevent the phone from tilting down and capturing only the ground right in front of me. Maybe a different way of mounting the phone may solve this - will try out different orientations.
Time taken for processing -
Hyperlapse took around 10 minutes per video to import, and 2 minutes to export as 4x sped up 720p video. Input videos were 1080p 30 fps captured by OpenCamera with the phone's default bitrate and codec, 17 Mbps mp4, file size limited to 1 GB. The 1 GB had around 8 minutes of footage. So, overall speed of Hyperlapse was 12 minutes for 8 minutes of footage, 1.5x real-time.
Kdenlive + vidstab was much slower. Around 2.5x real-time for just rendering mp4 to mp4. This is at a higher bitrate, but on an i7 Macbook. And around 50 minutes for an 8 minute clip stabilization. So, for speeding up 4x and then stabilizing, it would take around 35 minutes in a two-step process, or 4.4x real-time.
So, I'm going with Hyperlapse. Maybe my colleagues with better stabilization software would prefer the raw footage, so I'm archiving the raw footage separately.
Copy-pasting from an email I wrote to a colleague - Regarding email - currently, our domain uses GSuite legacy free plan and does not allow expansion of the existing amount of space. So, the only way is to delete large attachments. In many cases, the attachments are required and cannot be deleted. This can be handled in many ways.
1. Forward them themewise to specially created gmail ids and then delete
2. archive them locally by storing on a local hard disk and then delete
3. automate the local archiving using some tool like
We did a first test of a video screening solution for our waiting area at the planetarium. The idea is to have videos playing on the screen, with some onscreen text indicating the probable time of the next show. Raspberry Pis to play out on old surplus VGA or TV screens. After a bit of trial and error, the method used was to play videos using VLC called from a script, cvlc -I http --http-port 43210 --http-password MyPassword --fullscreen --no-video-title --sub-source="marq{file=/pathto/marq.txt,position=10}" /home/pi/playlist.xspf
Auto starting using a .desktop file put in .config/autostart directory as described at https://www.raspberrypi.org/forums/viewtopic.php?t=17051
with the contents of the .desktop file being [Desktop Entry] Type=Application Exec=/path/to/my/shellscript.sh
Modifying the marq.txt is currently by ssh, need to make some better solution, perhaps using a web server and PHP or something like that. Some images below of our test setup -
Imported into kdenlive as an image sequence and then exported with pan and zoom effect applied.
Bug and workaround - kdenlive 15.12.3 which comes with Linux Mint 18.1 has an issue with importing image sequences when the numbering is not sequential, or jumps. For example, the image sequence shot by OpenCamera had filenames like
Although kdenlive would see all 463 files in the folder, the images after 85953 would be ignored, and 85953 would be repeated for those frames. Workaround was to put the 8xxx sequence in one folder, 9xxx sequence in a separate folder, etc, and then import as image sequence.
kdenlive 18.12.1 64 bit appimage seems to have mitigated this bug by just importing those frames in the sequence it recognizes, without causing any of the repeat frames. But in the clip properties, it still erroneously shows the larger number of frames found etc. So, the workaround above is recommended.
Using the TVS MSP345 printer with Epson 24-pin generic drivers on Linux, we need to use the resolution 360x180 - lower than that, the print quality is terrible, and higher than that, it just prints the print codes.
One of our units had two domains, longname.tld and shortname.tld - they asked if they would receive emails sent to user@shortname.tld which had been set up as a domain alias in GSuite. My reply -
The above holds good for receiving emails from username@shortname.tld
If you wish to send emails from username@shortname.tld (as against username@longname.tld), you need to follow the procedure below by logging on to username@longname.tld
Made this list for the people at Studio, since I would no longer be processing mandir audio for rebroadcast -
1. Listen to the whole thing (if feasible at 2x speed, or at mandir itself, while the program is going on), mark problematic parts with markers.
2. If the program is a drama that contains copyrighted songs, edit out those songs within only 10-20 seconds.
3. If the program is of poor quality, like songs which are completely out of tune, do not process for broadcast.
4. If the program has speeches which are not of general interest, or which are not suitable for broadcast due to poor delivery, do not process for broadcast. If the speech is good, but marred by repetitive words like Ummmm / Aaaah / "You know" / "Like" etc, edit those out. Also edit out any gaps like speaker turning pages, speaker drinking water, etc.
5. If it is a music program, try to cut into individual songs/announcements if possible. Filenames similar to historical filenames which you can see under MSV* and SV* in our local cdsearch page.
6. For speeches, I have been processing to remove noise as per this: http://hnsws.blogspot.com/2010/01/tips-for-clean-audio.html or http://hnsws.blogspot.com/2013/11/another-audio-cleanup-tool-chain-reaper.html
7. I have been skipping processing Telugu dramas for AsiaStream once TeluguStream started, so that if the Telugu team is interested, they can use for TeluguStream. Similarly now with Hindi team.
I had made a mistake in income tax calculation and payment, and in the intimation sent by the Income Tax department, there was a demand to pay Rs. 230 as tax. The clickable link on the pdf did not work for me (since I was using Linux) with pdf readers Xreader and Google Chrome. So, googled and got the website
The next links were deciphered using the Challan included in the pdf. Challan No. 280, so the relevant link for 280. Address as per PAN. Details of payment as per the Challan again, (no surcharges or penalties for me.) And as soon as the confirmation link is clicked, we get a downloadable receipt. Done. Painless.
An idea for low cost desktops for applications like billing counter etc - Found this, https://eltechs.com/product/exagear-desktop/ for running Windows software on the Pi.
Cost of full fledged Pi system would be < Rs. 4000 including software and HDMI to VGA convertor which would enable use of old monitors.
I did not know about the gui capabilities of Octave - some old gui programs I had made with GUIDE on Matlab more than a decade ago had refused to run, so I thought it did not have that capability. But now I see that I only have to avoid nested functions - ie. sub-functions inside another function.
There was a query from one of our sister institutions about their Android app having issues playing audio from server1 but playing audio from server2 without problems.
For Audio files that are present in server2 we are able to download/stream, for all the android devices (including Android 4.4 version devices also) . But Audio files present in server1 is not downloading/streaming for few android devices (like Android 4.4 version devices etc).
Links from both the servers are mentioned for your reference.
http://server1/path/1.mp3 (not working in all the devices) Same links we have tested for https also.
http://server2/path/1.mp3 (working in all the devices)
Kindly suggest us how to go about this issue.
Excerpts from my reply:
The only difference I can see is that server1 is auto-redirecting to https
So, if the devices are not capable of handling https, [Edit: or http to https redirects] they will fail with server1.
server2 is not doing the auto-redirect to https - so, http works as-is on that server.
If the devices are capable of https, perhaps you can just give the https link instead of http link, so that the redirection is not required - in case the redirection is what is causing the failure.
SBI is updating their debit cards as per RBI mandate to chip-based cards, and I received a mailer with my updated card. Getting it to work was a bit of a struggle.
1. First tried the 'send SMS, get one time PIN' method. Did not get any response. So, tried the next - Netbanking method.
2. Set the first two digits of the PIN, AA, and then the next two digits BB are sent via SMS. Then AABB would be the PIN.
Then, I received the one time PIN from step 1. So, that was probably the reason the card was declined when I tried to use it at the Canara bank ATM.
Then, tried
3. Changing the PIN from SBI ATM - went to the SBI ATM early in the morning to avoid crowds. Used the Generate PIN from the first screen. That sent me a one time PIN. But apparently, that was for one-time use only. "You must change the PIN before use." But the change PIN menu item is not immediately obvious. For that,
4. Again swiped the card, used the one time PIN, went into Banking menu, and there, found the Change PIN option. Changed, now the card works.
Settings.