Videocapture samples cleanup cpp

[gursimarsingh]

Cleanup: #25006 Following videocapture cpp samples have been combined to videocapture_with_audio.cpp:

videocapture_basic.cpp videocapture_audio.cpp videocapture_microphone.cpp videocapture_starter.cpp videocapture_image_sequence.cpp videocapture_camera.cpp

videocapture_basic.cpp has been moved snippets folder and references in documentation have been updated accordingly

videowriter_basic.cpp has been renamed to videowriter.cpp, with new options to specify codec, fps and resolution for the user

Pull Request Readiness Checklist

See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request

• [x] I agree to contribute to the project under Apache 2 License.
• [x] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV
• [x] The PR is proposed to the proper branch
• [x] There is a reference to the original bug report and related work
• [ ] There is accuracy test, performance test and test data in opencv_extra repository, if applicable Patch to opencv_extra has the same branch name.
• [x] The feature is well documented and sample code can be built with the project CMake

[asmorkalov]

Still get "core dumped" after:

./bin/example_cpp_videocapture_with_audio --wt
Extracting audio samples from default device...
[ WARN:0@0.089] global cap_gstreamer.cpp:2840 handleMessage OpenCV | GStreamer warning: Embedded video playback halted; module v4l2src0 reported: Internal data stream error.
[ WARN:0@0.091] global cap_gstreamer.cpp:1698 open OpenCV | GStreamer warning: unable to start pipeline
[ WARN:0@0.091] global cap_gstreamer.cpp:1173 isPipelinePlaying OpenCV | GStreamer warning: GStreamer: pipeline have not been created
Audio Data Depth: <invalid depth>
Audio Samples Per Second: -1
Total Audio Channels: -1
Total Audio Streams: -1
terminate called after throwing an instance of 'std::length_error'
  what():  vector::_M_default_append

[asmorkalov]

@mshabunin could you take a look on audio part?

[asmorkalov]

@mshabunin Please take a look again.