Facing Segmentation fault When reading video using ffmpeg, because the address of “pFormatCtx-> streams [i]-> codecpar” is 0x00

When reading real time video stream by using ffmpeg, pFormatCtx-> streams [i]-> codecpar is 0x00, but pFormatCtx-> streams [i]is 0x55555579bbc0. my source code is as below where error occurs in line if (pFormatCtx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) //open media file if (avformat_open_input(&pFormatCtx, url, NULL, &avdic) != 0) { std::cout<<“can’t open the file. \n”; return; } //find the…

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Why is mount mounting the directory to /dev/loop0 instead of the device? Can’t write all my files to the directory as a result (since it’s too small)

I want to write about 38 MB of files to a partition that is 100 MB large. However, when I mount that partition to the directory, it mounts to /dev/loop0 instead of /dev/sdc1 (in my example). This seems to be a problem as the mv command won’t let me write all 38 MB of files…

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How to remove Maven in 16.04

Eons ago I installed Maven (build tool for Java) and now I’m not able to remove it. Probably I installed it without the standard Ubuntu repository, maybe I built from source, no idea. The program does exist: ➜ ~ mvn -v Apache Maven 3.5.0 (ff8f5e7444045639af65f6095c62210b5713f426; 2017-04-03T21:39:06+02:00) Maven home: /opt/maven Java version: 1.8.0_181, vendor: Oracle Corporation…

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How to find acpi drivers for specific acpi device / Solving kernel suspend bug

I’m following https://wiki.ubuntu.com/DebuggingKernelSuspend and it says that I have to reboot the system with sudo sh -c “sync && echo 1 > /sys/power/pm_trace && pm-suspend” and find the lines that says hash matches in dmesg rigth after reboot (what does that mean?) Well, I found two: [ 3.583591] ima: Allocated hash algorithm: sha1 [ 3.593050]…

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WordPress BlogInfo() not working! What is going on?

ScreenShot of Code When I run this code <?php function greet($name, $color) { echo “<p>Hi, my name is $name and my favorite color is $color.</p>”; } greet(‘John’,’blue’); greet(‘Jane’, ‘yellow’); ?> <h1><?php bloginfo(‘name’); ?></h1> I am taking this from a tutorial. I followed it exactly. I am in the WordPress folder (wordpress/wp-content/themes/sitename/index.php But I get a…

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