Open tpltnt opened 5 years ago
Hmm... this looks to me like a failure to find your webcam. I'm not sure I can debug this, since my hardware works.
Interesting. The problem actually seems to be on my end. I can use my webcam with a browser, but not via processing (as a quick test). Either way, a more graceful error-handling should help future users.
I've tried
sudo apt-get install -y libv4l-dev
and
sudo apt-get install libjpeg-dev
It resolves this problem but now I have another one:
RUST_BACKTRACE=1 cargo run --example hello_camera
Finished dev [unoptimized + debuginfo] target(s) in 0.09s
Running `target/debug/examples/hello_camera`
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: InvalidFps([0.0])', examples/hello_camera.rs:5:15
stack backtrace:
0: backtrace::backtrace::libunwind::trace
at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/libunwind.rs:86
1: backtrace::backtrace::trace_unsynchronized
at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/mod.rs:66
2: std::sys_common::backtrace::_print_fmt
at src/libstd/sys_common/backtrace.rs:78
3: <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt
at src/libstd/sys_common/backtrace.rs:59
4: core::fmt::write
at src/libcore/fmt/mod.rs:1069
5: std::io::Write::write_fmt
at src/libstd/io/mod.rs:1504
6: std::sys_common::backtrace::_print
at src/libstd/sys_common/backtrace.rs:62
7: std::sys_common::backtrace::print
at src/libstd/sys_common/backtrace.rs:49
8: std::panicking::default_hook::{{closure}}
at src/libstd/panicking.rs:198
9: std::panicking::default_hook
at src/libstd/panicking.rs:218
10: std::panicking::rust_panic_with_hook
at src/libstd/panicking.rs:511
11: rust_begin_unwind
at src/libstd/panicking.rs:419
12: core::panicking::panic_fmt
at src/libcore/panicking.rs:111
13: core::option::expect_none_failed
at src/libcore/option.rs:1268
14: core::result::Result<T,E>::unwrap
at /home/kenny/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/src/libcore/result.rs:1005
15: hello_camera::main
at examples/hello_camera.rs:5
16: std::rt::lang_start::{{closure}}
at /home/kenny/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/src/libstd/rt.rs:67
17: std::rt::lang_start_internal::{{closure}}
at src/libstd/rt.rs:52
18: std::panicking::try::do_call
at src/libstd/panicking.rs:331
19: std::panicking::try
at src/libstd/panicking.rs:274
20: std::panic::catch_unwind
at src/libstd/panic.rs:394
21: std::rt::lang_start_internal
at src/libstd/rt.rs:51
22: std::rt::lang_start
at /home/kenny/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/src/libstd/rt.rs:67
23: main
24: __libc_start_main
25: _start
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
I fixed this error increasing the number of frames as:
let cam = cam.fps(30.0).unwrap().start().unwrap();
oh. I hardcoded a fps in the examples? Yea we should fix that. I don't remember how to extract the fps and don't have time right now to really dig into this crate again, but I'll happily accept PRs
Hi there,
i tried the examples and got the following results:
cargo run --example glium
: "An error occured: Webcam thread was killed or did not responded for 500ms. Stopping."cargo run --example hello_camera
: "thread 'main' panicked at 'calledResult::unwrap()
on anErr
value: InvalidFps([0.0, 0.0])', src/libcore/result.rs:997:5" (looks like #18)cargo run --example take_picture
: "thread 'main' panicked at 'calledResult::unwrap()
on anErr
value: InvalidFps([0.0, 0.0])', src/libcore/result.rs:997:5" (also looks like #18)Cheers, tpltnt