Rust: How to record a video

help
1

Hi rust community :smiley:
I am using camera-capture crate(https://crates.io/crates/camera_capture/0.5.0), but it won't finish the build. It says ;

   Compiling camera_capture v0.5.0
   Compiling crossbeam-queue v0.2.1
   Compiling memoffset v0.5.3
   Compiling num-iter v0.1.40
error: failed to run custom build command for `camera_capture v0.5.0`

Caused by:
  process didn't exit successfully: `/home/eqelibari/Projects/1/testsavefile/target/debug/build/camera_capture-fa6eea4c9a055251/build-script-build` (exit code: 101)
--- stdout
cargo:rerun-if-changed=Cargo.toml

--- stderr
thread 'main' panicked at 'library `v4l2` not found: Failure { command: "\"pkg-config\" \"--static\" \"--libs\" \"--cflags\" \"libv4l2\"", output: Output { status: ExitStatus(ExitStatus(256)), stdout: "", stderr: "Package libv4l2 was not found in the pkg-config search path.\nPerhaps you should add the directory containing `libv4l2.pc\'\nto the PKG_CONFIG_PATH environment variable\nNo package \'libv4l2\' found\n" } }', src/libcore/result.rs:1188:5
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace.

warning: build failed, waiting for other jobs to finish...
error: build failed

But i have already install v4l-utils ..

2

You probably need libv4l-dev / libv4l-devel to support pkg-config.

2 Likes
3

Yes thank you, and here the two steps for fixing this issue ! :smiley:

  1. sudo apt-get update -y
  2. sudo apt-get install -y libv4l-dev
4

When i execute rscam;

use rscam::{Camera, Config};
use std::fs;
use std::io::Write;

fn main() {
let mut camera = rscam::new("/dev/video0").unwrap();

camera.start(&rscam::Config {
    interval: (1, 30),      // 30 fps.
    resolution: (1280, 720),
    format: b"MJPG",
    ..Default::default()
}).unwrap();

for i in 0..10 {
    let frame = camera.capture().unwrap();
    let mut file = fs::File::create(&format!("frame-{}.jpg", i)).unwrap();
    file.write_all(&frame[..]).unwrap();
 }
}

it outputs ;

   Compiling testsavefile v0.1.0 (/home/eqelibari/Projects/1/testsavefile)
    Finished dev [unoptimized + debuginfo] target(s) in 0.55s
     Running `target/debug/testsavefile`
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: BadResolution', src/libcore/result.rs:1188:5
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace.

I tried to change the resolution in higher pixels,but it still panic with the same error..

5

When I saw the title, I thought “no way did someone actually show up here looking for the video game”.

So this was a pleasant surprise :slight_smile:

EDIT: Sorry for the slightly off-topic. I was just floored.

4 Likes
6

Haha :stuck_out_tongue:

1 Like
7

I don't know anything about using that crate, but it looks like Camera::resolutions will tell you what it's capable of.

1 Like
8

@cuviper I just had to change the format, from MJPEG to RGB3 or Default (in my case).
Its capture 10 jpg images and saves them,but now when i try opening these images , an error message is printing me: Could not load Image: frame-1.jpg. Error interpreting JPEG image file (Not a JPEG file: starts with 0xfc 0xfc). How can i fix this..

9

My guess is that you've got raw RGB pixel values, not encoded in any image format.

10

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