Re: [Interest] Do Camera.videoRecorder options matter?

plemented? > > >> Sent: Thursday, December 03, 2015 at 4:46 AM >> From: "Lopes Yoann" >> To: "Jason H" >> Cc: interest >> Subject: Re: [Interest] Do Camera.videoRecorder options matter? >> >> >>> On 02 Dec 2015, at 23:49, Ja

Re: [Interest] Do Camera.videoRecorder options matter?

> On 02 Dec 2015, at 23:49, Jason H wrote: > > But I'm looking at the videoRecorder stuff and none of it seems to matter. > I'm looking at: > https://fossies.org/linux/qt-everywhere-opensource-src/qtmultimedia/src/plugins/avfoundation/camera/avfmediarecordercontrol.mm > > Line 225: void AVFMe

Re: [Interest] Video Recording of QQuickView

> On 18 Sep 2015, at 21:55, Jérôme Godbout wrote: > > Hi, > I have a built-in screen capture that use the QQuickView::grabWindow() > function inside my Qml application. I was wondering is there a way to perform > a video recording of the content? > > Do I have to take many images and create a

Re: [Interest] QCamera flash modes

On 22 Jul 2015, at 22:41, Jason H mailto:jh...@gmx.com>> wrote: This is not working. So In QML, I start the backface camera, and it grabs viewfinder frames. I then call my C++ object which has this function: bool FlashControl::isFlashSupported(){ camera = new QCamera(QCamera::BackFace); if (came

Re: [Interest] QCamera flash modes

> On 20 Jul 2015, at 21:34, Jason H wrote: > > However all I ever get is false. This is being run on an iPhone 5S, which > does have a backface flash, and I do use the flash successfully in QML. I'm > attempting to also support iPads which do not have a flash at all, but I need > to know that

Re: [Interest] Camera not worknig on IOS

Issues related to video recording are fixed for 5.5.0. — Yoann ___ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest

Re: [Interest] Qt 5.4.2 snapshot ios camera capture issue

I assumed you were using the URL from the imageSaved() signal, not from the imageCaptured() signal. In that case, no, you can’t read the EXIF reader from that URL. However, I didn’t think about that earlier but there’s an even simpler workaround. If your VideoOutput’s autoOrientation property is

Re: [Interest] Qt 5.4.2 snapshot ios camera capture issue

On 11 May 2015, at 17:12, Jason H mailto:jh...@gmx.com>> wrote: This breaks our app and back-end processing for mobile. How do we fix this? You could read the image orientation from the EXIF header in your app and apply the rotation to the QML Image element. — Yoann ___

Re: [Interest] Qt 5.4.2 snapshot ios camera capture issue

This is not caused by a change in the AVFoundation plugin. EXIF orientation support in QImage was added in 5.4.0 but it was then removed in 5.4.2 because it was a behavioral change. See https://codereview.qt-project.org/#/c/111398/ and https://bugreports.qt.io/browse/QTBUG-37946. -- Yoann _

Re: [Interest] [Development] Sound routing

On 27 Apr 2015, at 12:23, Federico Buti mailto:bacaro...@gmail.com>> wrote: it seems to me that sound is automagically routed to the outer speaker, not the dialling speaker. The outer speaker should never play sound in my app, i.e. with a tablet device I'm limited to using just earphones. Th

Re: [Interest] [Development] Sound routing

On 27 Apr 2015, at 11:15, Federico Buti mailto:bacaro...@gmail.com>> wrote: 2) The app requires a specific sound routing: if the earphones are plugged, sound should be hear only on them. If earphones are not available, sound should be routed to the phone speaker (for smartphone devices). Such

Re: [Interest] iOS app store rejection - microphone consent?

This is a bug in Qt. The camera plugin always creates an audio AVCaptureDeviceInput and add it to the AVCaptureSession, which in turn causes the microphone permission prompt. That audio capture input should be added only when recording video. I created a bug report for that: https://bugreports.q

Re: [Interest] Camera.focus.focusZones.length is 0?

A bug with searchAndLock() has been fixed for 5.5.0, see QTBUG-42224. As for Camera.focus.focusZones, are you sure the list is empty? With that example, the focus rectangle can be almost invisible in some cases. If the camera is not in focus, the res

Re: [Interest] Camera.focus.focusZones.length is 0?

> On 14 Apr 2015, at 18:44, Jason H wrote: > > I am trying to get more reliable (read: in-focus) images. It seems that > Camera.searchAndLock() is not enough, for various reasons that I won't go > into. I am approaching this problem from multiple angles. I now include > accelerometer data to

Re: [Interest] Problem with QCameraImageCapture

Hi, Capturing to buffer is not currently supported on Windows, that’s why the signal is never emitted. — Yoann > On 06 Apr 2015, at 18:30, Igor Mironchik wrote: > > Hi, Bob. > > Thank you. > > On Mon, 06 Apr 2015 18:21:38 +0300, Bob Hood wrote: > >> Hi, Igor. >> >> I tested your example

Re: [Interest] QML Camera has flash?

On 30 Mar 2015, at 17:30, Jason H mailto:jh...@gmx.com>> wrote: What? This is a pretty big issue if it is as big as I understand. Can QML on iOS control flash? Or do you mean something else? If my understanding of correct, when is the timeline for this feature to be implemented? Among other mis

Re: [Interest] QML Camera has flash?

On 27 Mar 2015, at 16:15, Jason H mailto:jh...@gmx.com>> wrote: How can I detect if the flash is even present? I have a logic path way that wants to collect non-flash and if present a flash image: collectNonFlash() if (camera.hasFlash) // - I wish this property existed. collectFlash() However

Re: [Interest] QMediaPlayer with H.264 Camera over RTSP

On 03 Feb 2015, at 16:48, FROMME Edwin mailto:e.fro...@spikenet-technology.com>> wrote: So, i wrote a code based on QMediaPlayer displayed by a homemade class inherits from QAbstractVideoSurface. When I load local file, everything works fine but when I load a RTSP URL, there is nothing going.

Re: [Interest] GStreamer missing plugin error

> > Will GStreamer 1.0 be default in the official Qt 5.5.0 binary installers? As > far as I understood you have to enable it during compile time, so I would > need to build it myself with 1.0 support enabled, correct? That’s correct, GStreamer 1.0 will have to be explicitly enabled in 5.5 and

Re: [Interest] GStreamer missing plugin error

On 28 Jan 2015, at 13:48, René J.V. Bertin wrote: > > On Wednesday January 28 2015 10:02:26 Thiago Macieira wrote: > >>> Does that mean that Qt evolves in x.1 steps nowadays?? >> >> We've always released minor versions. You may remember 4.7 happened before >> 4.8. >> >> If you meant something

Re: [Interest] GStreamer missing plugin error

On 27 Jan 2015, at 19:12, Thiago Macieira wrote: > > On Tuesday 27 January 2015 17:49:50 Harri Pasanen wrote: >> I wonder if there are plans to migrate to GStreamer 1.0? That is more >> than two years old, and 0.10 is about ten years old. Ubuntu seems to >> have switched in 14.04->14.10, I d

Re: [Interest] Camera won't capture photos in quick succession

On 11 Dec 2014, at 15:15, Jason H mailto:jh...@gmx.com>> wrote: Which ready are we talking about? The flash ready or the camera ready? I don't mind adding an onReadyChanged, but it is not clear where I should add it. I meant the Camera.imageCapture.ready property. _

Re: [Interest] Camera won't capture photos in quick succession

On 11 Dec 2014, at 13:02, Jason H' mailto:jh...@gmx.com>> wrote: It's not so much that I need sub-second captures. It's that i need to reliably have my requests serviced. Currently if I do the trivial case that should be possible according to the docs, the 2nd request fails more than it succeed.

Re: [Interest] Camera won't capture photos in quick succession

On 10 Dec 2014, at 21:33, Jason H wrote: > > Per http://qt-project.org/doc/qt-5/qml-qtmultimedia-cameracapture.html > "It's permissible to call capture() while the camera is active regardless of > the ready property value. If camera is not ready to capture image > immediately, the capture reque

Re: [Interest] QML Camera api question

> On 03 Dec 2014, at 18:22, Harri Pasanen wrote: > > QCameraExposure::isExposureModeSupported() would seem to be the function > to call in C++, but how to do that from QML? > > Same goes for supportedApertures, IsoSensitivities, etc. There are no QML equivalents at the moment. You’ll have to m

Re: [Interest] HLS Streaming in Qt?

Hi, As Mandeep said, it depends on the backend. Apple’s AVFoundation framework, which we use on iOS and Mac OS, supports playing HLS streams. However it doesn’t currently work because of an implementation issue on our side; see https://bugreports.qt-project.org/browse/QTBUG-39720. Yoann Lopes

Re: [Interest] qcamera resolution issue

Yes the backend is DirectShow. You can find the code in "qtmultimedia/src/plugins/directshow/camera". Changing the preview resolution is simply not implemented, it's of course technically possible. Your solution using directly DirectShow doesn't work because a QWidget embedded in a QGraphicsPro

Re: [Interest] qcamera resolution issue

On Jun 12, 2014, at 7:51 AM, Sarath Natakam wrote: How can one set the desired resolution for streaming? The user of this application will have a drop down to select resolution and preview it in that resolution. The Qt multimedia backend for Windows doesn't implement that feature, the camera p

Re: [Interest] Youtube View example in 5.3.0

On Jun 10, 2014, at 11:40 PM, Luca Carlon wrote: I would like to be able to play youtube videos in a QML element. I came across the perfect example in the Qt tree: http://qt-project.org/doc/qt-5/qtwebkitexamples-webkitqml-youtubeview-example.html. However it seems to work perfectly for me on Li

Re: [Interest] QtMultimedia and Live-TV

On May 26, 2014, at 9:05 PM, Cornelius Hald wrote: is it possible to use Live-TV (e.g. DVB-S) on Linux using QtMultimedia and QtQuick? I guess that would involve Video4Linux and GStreamer. So basically it should be mostly the same as using a webcam. Right? You're right it's mostly the same. It sh

Re: [Interest] Custom pipeline for QML MediaPlayer

On May 28, 2014, at 9:45 AM, Neuer User wrote: > > While the MediaPlayer in Qt5 is really great (especially with the new > zero-copy patch for imx6 in Qt5.3!), the "playbin" and "camerabin" > elements are not flexible enough and are not able to work with most IP > cams or with local analog video s

Re: [Interest] Using QMediaplayer with QAbstractVideoSurface on Android?

On May 19, 2014, at 10:10 AM, Ola Røer Thorsen wrote: > With the single-thread rendering loop, present is called. However it seems > that also start and stop is called for each single frame as well. That was a bug, fixed by https://codereview.qt-project.org/#change,85675 > When the rest is impl

Re: [Interest] Using QMediaplayer with QAbstractVideoSurface on Android?

On May 13, 2014, at 4:52 PM, Lopes Yoann wrote: > Another thing you need to know is that the texture you'll get uses the > GL_TEXTURE_EXTERNAL_OES texture target and not the regular GL_TEXTURE_2D > target. You can find some information about this here > http://developer.andr

Re: [Interest] Using QMediaplayer with QAbstractVideoSurface on Android?

Hi, On Android, a media player can only render to texture or directly to screen. We currently only support rendering to texture. The texture is created by the Android Qt Multimedia plugin following a callback from the QSGVideoNode in the scenegraph thread. That callback is a hack and doesn't a

Re: [Interest] One MediaPlayer on two VideoOutput elements?

On Apr 30, 2014, at 12:36 PM, Neuer User wrote: > Hi > > I need to show an RTSP video played by a MediaPlayer element on two > different VideoOutput elements. I can't get it to work. Only the last > VideoOutput in the code works. > > Am I doing something wrong? Or is this just not expected to wo

Re: [Interest] QtMultimedia usage for fetching coverArtUrl in Qt5.3

On Apr 17, 2014, at 12:05 PM, Ramakanthreddy Kesireddy wrote: In Qt5.3, is it possible to retrieve audio thumbnail on embedded Linux using QML Audio type or metadata? Am interested in CoverArtUrlSmall or CoverrtUrlLarge metadata from the audio file-path or do I need to go for any thirdparty libra

Re: [Interest] Qt 5.3 multimedia new plugin structure

On Apr 15, 2014, at 11:01 AM, Cornelius Hald wrote: > I've just noticed that we now have plugins/mediaservice and > plugins/audio. Anyone knows the difference? At least on Windows both > contain audio plugins. > > E.g. > plugins/mediaservice/qtmedia_audioengine.dll This one could be renamed, it'

Re: [Interest] Creating a video feed or overlay

On Mar 28, 2014, at 7:41 PM, Tom Isaacson wrote: > I'm working on an app that reads data from a sensor then displays it on a > graph using qwt. This part is working fine but what we want to do now is > create a video feed of the graph that can be displayed in other apps. We'd > also like to ad

Re: [Interest] GStreamer as video backend under Windows

No, not at the moment. Though, it's probably only a matter of adding a configure option to specify the GStreamer SDK installation directory, and adapting our plugin .pro files. -- Yoann Lopes ___ Interest mailing list Interest@qt-project.org http://lis

Re: [Interest] system wide sound control / QtMultiMedia/Phonon question

On Mar 21, 2014, at 8:47 AM, Damian Ivanov wrote: > Is there a Qt API so I can control system-wide sound (like volume > slider + mute button) No there isn't, at least not at a system level. You can only change the volume of a given QMediaPlayer (or QAudioOutput) own audio stream. You'll have to u

Re: [Interest] iOS 7 - Audio Recorder Example - no service found for "org.qt-project.qt.audiosource'

It should work with qtmedia_audioengine added to QTPLUGIN. Is that one in "/plugins/mediaservice"? Yoann Lopes Senior Software Engineer - Digia, Qt Visit us on: http://qt.digia.com ___ Interest mailing list Interest@qt-project.org http://lists.qt-proj

Re: [Interest] QVideoProbe Woes

You can use the QAbstractVideoSurface solution, for camera sources you'll always be able to get the pixel data. It's not currently implemented on Android though, but it will be in 5.3.0. You can expect to get data in either RGB32, NV21, or YV12 pixel formats. Make sure your custom QAbstractVideo

Re: [Interest] QVideoProbe Woes

On Feb 10, 2014, at 3:54 PM, Jason H wrote: > No, that was not in the doc. http://qt-project.org/doc/qt-5/qvideoprobe.html I meant it should be added to the doc. > This is some seriously distressing news. Basically, I what you are telling me > is can't build my app in Qt. There is another solu

Re: [Interest] QAudioProbe and QMediaPlayer

On Feb 3, 2014, at 5:40 PM, Ziggy Uszkurat wrote: I’m trying to attach a QAudioProbe to QMediaPlayer but I’m having no luck. When I setSource it returns false. Can anyone give me a clue where I might be going wrong? You are not doing anything wrong, not all multimedia APIs are supported on all

Re: [Interest] QVideoProbe Woes

2c. using (passing) a Camera element as sourceObj, what will happen? It will also work. That was in theory. In practice, it depends on the platform. QVideoProbe is not available on all of them (or only for either a media player or a camera). It should be in the doc, but here's an overview of QV

Re: [Interest] QVideoProbe Woes

1. I'm trying to work with video here. you keep mentioning audio, but how does QVideoProbe work with audio-derived classes? Even if it may sound strange, QDeclarativeAudio is not audio-specific... in fact it just wraps a QMediaPlayer, which can be used for audio or video. 2a. using a Video ele

Re: [Interest] QVideoProbe Woes

On Feb 6, 2014, at 10:07 PM, Jason H wrote: So I made a basic wrapper class (included below) for QVideoProbe to expose it to QML. I can set the source property, but when I do it reports it gets a QDeclaritiveAudio class instance, ans the setSource() call fails. How can I get the video part of i

Re: [Interest] Grabbing frames from the camera

I think this is simply bad API design... It should be QAbstractVideoSurface::present(QVideoFrame &frame) instead. It's absolutely safe to ignore the const-ness of the video frame. Yoann Lopes Senior Software Engineer - Digia, Qt Visit us on: http://qt.digia.com _

Re: [Interest] More QAudioRecorder codecs on Windows

On Jan 19, 2014, at 5:08 AM, Sze Howe Koh wrote: On Linux, QMediaRecorder::supportedAudioCodecs() returns a wide variety of codecs. On Windows 8.1 however, I only get "audio/pcm". I've read that Qt Multimedia uses WMF on Windows, which already provides a few encoders natively. Are these encoders

Re: [Interest] QML and video

On which platform are you? Embedded Linux using GStreamer as multimedia backend? Yoann Lopes Senior Software Engineer - Digia, Qt Visit us on: http://qt.digia.com ___ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/lis

Re: [Interest] Select front/rear camera on Android

On Jan 7, 2014, at 12:28 PM, Cornelius Hald wrote: The only workaround is to create a custom QML item in C++... That's fine with me. However I'm not really sure how to do that as it looks like QDeclarativeCamera has only private headers. Could you give me a hint please. I meant to basically rewr

Re: [Interest] Select front/rear camera on Android

On Dec 30, 2013, at 11:48 AM, Cornelius Hald wrote: So there seems to be no way to select the camera when using QtQuick/QML. This is not Android specific, but a general issue. Indeed the QML API for selecting the camera is currently missing. We plan to add this in 5.3. If anyone knows of a work

Re: [Interest] QCamera and QCameraViewFinder

Oh, I overlooked the code sample you provided. You should listen to the imageAvailable() signal instead of imageCaptured(). What you get from imageCaptured() is just a preview, it's emitted right after the camera sensor captured the image but at this point the final image is not processed yet.

Re: [Interest] QCamera and QCameraViewFinder

Which platform are you on? Yoann Lopes Senior Software Engineer - Digia, Qt Visit us on: http://qt.digia.com On Nov 5, 2013, at 7:14 AM, Joshua Grauman wrote: Hello all, I setup a basic use of QCamera and QCameraViewFinder that work fine. I just used the basic example in the docs to capture an

Re: [Interest] Webcam recording

On Oct 30, 2013, at 5:50 PM, BOUCARD Olivier wrote: OK... But I don't have camerabin2 in my distro gst-plugins-bad. I have to figure out a way to install it. You can compile gst-plugins-bad from git (RELEASE-0.10.23 tag) or from http://cgit.freedesktop.org/gstreamer/gst-plugins-bad/snapshot/RELE

Re: [Interest] Webcam recording

Actually, it's the 'camerabin2' element that is needed. Can you check if you have that one? If you don't, install the "gst-plugins-bad" package. Yoann Lopes Senior Software Engineer - Digia, Qt Visit us on: http://qt.digia.com ___ Interest mailing list

Re: [Interest] Webcam recording

Hi, Well QtMultimedia is a cross-platform API which has camera features ;) Video recording is currently supported on Mac, Linux, and mobile platforms, but not on Windows... (will be added in a future release) Otherwise maybe you can have a look at libVLC, it has support for camera as well. Yoa

Re: [Interest] Audio Metadata issue in Qt5.2.x

On Oct 19, 2013, at 2:16 PM, Sze Howe Koh wrote: This behaviour is quite different to most other setProperty()-type functions in Qt. Is it documented? It doesn't seem like it is, it should be documented. QMediaPlayer::setMedia() implies loading the media, which is always done asynchronously by

Re: [Interest] Audio Metadata issue in Qt5.2.x

Hi, QMediaPlayer::setMedia() is an asynchronous operation. The media is not done loading when you call mediaPlayer->metaData(). You need to listen to the metaDataAvailableChanged() signal to be notified whenever the metadata is available. See http://qt-project.org/doc/qt-5.0/qtmultimedia/qmedia

Re: [Interest] About usb cameras

On Sep 16, 2013, at 5:46 PM, Jason H wrote: Can someone tell me how to grab a frame and what is needed to be done to get to the point where I can do image processing easily? With the C++ API you can use QVideoProbe (http://qt-project.org/doc/qt-5.0/qtmultimedia/qvideoprobe.html). Though, with a

Re: [Interest] About usb cameras

You can use QCamera in the Qt Multimedia module. (http://qt-project.org/doc/qt-5.0/qtmultimedia/qcamera.html) You also have the Camera QML item (http://qt-project.org/doc/qt-5.1/qtmultimedia/qml-qtmultimedia5-camera.html) Yoann Lopes Senior Software Engineer - Digia, Qt Visit us on: http://qt.d

Re: [Interest] Playing MP4 and FLV with QMediaPlayer

On Windows 7, Media Foundation is the default backend. DirectShow is the default only on Windows XP (or with MinGW-built Qt on any version of Windows). The problem with Media Foundation is its limited codec support, see http://msdn.microsoft.com/en-us/library/windows/desktop/dd757927(v=vs.85).asp

Re: [Interest] Extraction of audio thumbnail using Qt5.1.1 on desktop Linux

Hi, There is currently no API to generate a thumbnail from a video. However we plan to add support for this in the future, see https://bugreports.qt-project.org/browse/QTBUG-2. The posterUrl metadata you mentioned is available only when the video container supports metadata and only if the

Re: [Interest] QML Video Element Error Query

Hi, Metadata properties are not always available depending on the underlying multimedia backend. I'm guessing you are using the GStreamer backend since you are working on KDE Plasma. Unfortunately the videoFrameRate property is not available with that backend. Yoann Lopes Senior Software Engin

Re: [Interest] Qt Multimedia - Record from Applications Output

Hi, This is not something you can do with Qt Multimedia at the moment. Feel free to create a suggestion at https://bugreports.qt-project.org if you would like to see this feature added to Qt in the future. Best regards, Yoann Lopes Senior Software Engineer - Digia, Qt Visit us on: http://qt.di

Re: [Interest] Getting the QQuickView that created a QMediaService instance or requested a QMediaPlayerControl

Hi, The only way to execute some of your code in the Scenegraph thread is to do it in the QAbstractVideoBuffer subclass you are passing to the QAbstractVideoSurface, in handle() if you provide a texture or in map() if you provide the frame data. Yoann Lopes Senior Software Engineer - Digia, Qt