Playing videos in PyQt5 will cause interruption problems

Tonyy

When I use PyQt5 in Ubuntu22.04 and use play() to play videos, the following problem occurs.

This is my code:

currentrow = self.Fail_case_table.currentRow()
        #currentcolumn = self.Fail_case_table.currentColumn()
        num = self.Fail_case_table.item(currentrow,0).text()
        local_position = os.path.abspath('.')
        Fail_case_video_path = local_position + self.path + "Video/" + str(num).split(">")[0] + ".mp4"
        if Video_mode == True:
            # self.Ui_Print_Fail_Video.show()
            # self.Ui_Print_Fail_Video.play(Fail_case_video_path)
            self.VideoPlayer = VideoPlayer()
            self.VideoPlayer.show()
            self.VideoPlayer.abrir(Fail_case_video_path)

This is an error message：

QFactoryLoader::QFactoryLoader() checking directory path "/home/yuying/anaconda3/envs/Qt_test/lib/python3.9/site-packages/PyQt5/Qt/plugins/mediaservice" ...
QFactoryLoader::QFactoryLoader() looking at "/home/yuying/anaconda3/envs/Qt_test/lib/python3.9/site-packages/PyQt5/Qt/plugins/mediaservice/libgstaudiodecoder.so"
Found metadata in lib /home/yuying/anaconda3/envs/Qt_test/lib/python3.9/site-packages/PyQt5/Qt/plugins/mediaservice/libgstaudiodecoder.so, metadata=
{
    "IID": "org.qt-project.qt.mediaserviceproviderfactory/5.0",
    "MetaData": {
        "Keys": [
            "gstreameraudiodecode"
        ],
        "Services": [
            "org.qt-project.qt.audiodecode"
        ]
    },
    "archreq": 0,
    "className": "QGstreamerAudioDecoderServicePlugin",
    "debug": false,
    "version": 330752
}


Got keys from plugin meta data ("gstreameraudiodecode")
QFactoryLoader::QFactoryLoader() looking at "/home/yuying/anaconda3/envs/Qt_test/lib/python3.9/site-packages/PyQt5/Qt/plugins/mediaservice/libgstcamerabin.so"
Found metadata in lib /home/yuying/anaconda3/envs/Qt_test/lib/python3.9/site-packages/PyQt5/Qt/plugins/mediaservice/libgstcamerabin.so, metadata=
{
    "IID": "org.qt-project.qt.mediaserviceproviderfactory/5.0",
    "MetaData": {
        "Keys": [
            "gstreamercamerabin"
        ],
        "Services": [
            "org.qt-project.qt.camera"
        ]
    },
    "archreq": 0,
    "className": "CameraBinServicePlugin",
    "debug": false,
    "version": 330752
}


Got keys from plugin meta data ("gstreamercamerabin")
QFactoryLoader::QFactoryLoader() looking at "/home/yuying/anaconda3/envs/Qt_test/lib/python3.9/site-packages/PyQt5/Qt/plugins/mediaservice/libgstmediacapture.so"
Found metadata in lib /home/yuying/anaconda3/envs/Qt_test/lib/python3.9/site-packages/PyQt5/Qt/plugins/mediaservice/libgstmediacapture.so, metadata=
{
    "IID": "org.qt-project.qt.mediaserviceproviderfactory/5.0",
    "MetaData": {
        "Keys": [
            "gstreamermediacapture"
        ],
        "Services": [
            "org.qt-project.qt.audiosource"
        ]
    },
    "archreq": 0,
    "className": "QGstreamerCaptureServicePlugin",
    "debug": false,
    "version": 330752
}


Got keys from plugin meta data ("gstreamermediacapture")
QFactoryLoader::QFactoryLoader() looking at "/home/yuying/anaconda3/envs/Qt_test/lib/python3.9/site-packages/PyQt5/Qt/plugins/mediaservice/libgstmediaplayer.so"
Found metadata in lib /home/yuying/anaconda3/envs/Qt_test/lib/python3.9/site-packages/PyQt5/Qt/plugins/mediaservice/libgstmediaplayer.so, metadata=
{
    "IID": "org.qt-project.qt.mediaserviceproviderfactory/5.0",
    "MetaData": {
        "Keys": [
            "gstreamermediaplayer"
        ],
        "Services": [
            "org.qt-project.qt.mediaplayer"
        ]
    },
    "archreq": 0,
    "className": "QGstreamerPlayerServicePlugin",
    "debug": false,
    "version": 330752
}


Got keys from plugin meta data ("gstreamermediaplayer")
QFactoryLoader::QFactoryLoader() checking directory path "/home/yuying/anaconda3/envs/Qt_test/bin/mediaservice" ...
loaded library "/home/yuying/anaconda3/envs/Qt_test/lib/python3.9/site-packages/PyQt5/Qt/plugins/mediaservice/libgstmediaplayer.so"
QFactoryLoader::QFactoryLoader() checking directory path "/home/yuying/anaconda3/envs/Qt_test/lib/python3.9/site-packages/PyQt5/Qt/plugins/resourcepolicy" ...
QFactoryLoader::QFactoryLoader() checking directory path "/home/yuying/anaconda3/envs/Qt_test/bin/resourcepolicy" ...

(python:919208): GStreamer-WARNING **: 11:18:09.384: Failed to load plugin '/usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstvaapi.so': /usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstvaapi.so: undefined symbol: gst_gl_display_egl_get_from_native

(python:919208): GStreamer-WARNING **: 11:18:09.388: Failed to load plugin '/usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstvaapi.so': /usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstvaapi.so: undefined symbol: gst_gl_display_egl_get_from_native

(python:919208): GStreamer-WARNING **: 11:18:09.433: Failed to load plugin '/usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstvaapi.so': /usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstvaapi.so: undefined symbol: gst_gl_display_egl_get_from_native
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(python:919208): GStreamer-WARNING **: 11:18:15.200: Failed to load plugin '/usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstvaapi.so': /usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstvaapi.so: undefined symbol: gst_gl_display_egl_get_from_native

(python:919208): GStreamer-WARNING **: 11:18:15.203: Failed to load plugin '/usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstvaapi.so': /usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstvaapi.so: undefined symbol: gst_gl_display_egl_get_from_native

How to troubleshoot the problem？

JoeCFD

@Tonyy Read the warning message: vaapi plugin is missing. It is used for GPU acceleration.
sudo apt install gstreamer1.0-vaapi

Be aware that vaapi is old and has been replaced by va-api.

Tonyy

@JoeCFD
I use the command
sudo apt install gstreamer1.0-vaapi
The returned message is as follows

Reading kit list... Done
Rebuilding dependencies... Complete
Reading status data... Complete
gstreamer1.0-vaapi is the latest version (1.20.1-1ubuntu1).
0 upgraded, 0 newly installed, 0 removed, 172 not upgraded.

The message indicates that I am already on the latest version.

My computer does not have a GPU
Will this have any influence?

JoeCFD

@Tonyy I think Qt5 uses gstreamer playbin to play audio/video although I have not seen the source code of Qt. If GPU is not available, vaapi will not be triggered automatically. Therefore, it is only a warning.

Try this from command line to see if gstreamer works:
gst-launch-1.0 -v playbin uri=file:///fullpath/filename

if gstreamer works, your problem could be Qt issue. Qt5 examples include a video play example and take a look at it.

Tonyy

@JoeCFD
I use the directive:
gst-launch-1.0 -v playbin uri=file:///fullpath/filename
The message received is that the resource cannot be found.

Set pipeline status to PAUSED...
Error: From /GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0/GstFileSrc:source element: Resource not found.
Additional debugging information:
../plugins/elements/gstfilesrc.c(536): gst_file_src_start (): /GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0/GstFileSrc:source:
No such file "/fullpath/filename"
Error: Pipeline does not want buffering.
Error: from /GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0/GstFileSrc:source element: GStreamer error: State switching failed, and some elements cannot display relevant error messages in this failure.
Additional debugging information:
../libs/gst/base/gstbasesrc.c(3556): gst_base_src_start (): /GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0/GstFileSrc:source:
Failed to start
Error: Pipeline does not want buffering.
Error: From /GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0/GstFileSrc:source element: Resource not found.
Additional debugging information:
../plugins/elements/gstfilesrc.c(536): gst_file_src_start (): /GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0/GstFileSrc:source:
No such file "/fullpath/filename"
Error: Pipeline does not want buffering.
Error: from /GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0/GstFileSrc:source element: GStreamer error: State switching failed, and some elements cannot display relevant error messages in this failure.
Additional debugging information:
../libs/gst/base/gstbasesrc.c(3556): gst_base_src_start (): /GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0/GstFileSrc:source:
Failed to start
Error: Pipeline does not want buffering.
Failed to set pipeline to PAUSED.
Set pipeline status to NULL...
Release pipeline...

JoeCFD

@Tonyy you replace filename with your own video file name and fullpath with the full path of your own video file.

Tonyy

@JoeCFD
gst-launch-1.0 -v playbin uri=file:///fullpath/filename
Here is the message I got:

Set pipeline status to PAUSED...
Pipeline is buffering...
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0: ring-buffer-max-size = 0
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0: buffer-size = -1
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0: buffer-duration = -1
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0: use-buffering = false
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0: download = false
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0: uri = file:///home/yuying/Desktop/autotest/DBManager/Test/7f73cee2-7858-4e16-b790-f6a1c17cf09a/Video/0.mp4
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0: connection-speed = 0
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0: source = "\(GstFileSrc\)\ source"
/GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/GstTypeFindElement:typefind.GstPad:src: caps = video/quicktime, variant=(string)iso
Error: From /GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0 element: Your GStreamer is missing a plugin.
Additional debugging information:
gsturidecodebin.c(988): no_more_pads_full (): /GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0:
no suitable plugins found:
gstdecodebin2.c(4679): gst_decode_bin_expose (): /GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0:
no suitable plugins found:
Missing decoder: Quicktime (video/quicktime, variant=(string)iso)

Error: Pipeline does not want buffering.
Error: from /GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/GstTypeFindElement: typefind element: Internal data stream error.
Additional debugging information:
../plugins/elements/gsttypefindelement.c(1232): gst_type_find_element_loop (): /GstPlayBin:playbin0/GstURIDecodeBin:uridecodebin0/GstDecodeBin:decodebin0/GstTypeFindElement:typefind:
streaming stopped, reason not-linked (-1)
Error: Pipeline does not want buffering.
"Quicktime demuxer" element does not exist
Set pipeline status to NULL...
Release pipeline...

JoeCFD

@Tonyy
try
sudo apt install gstreamer0.10-plugins-good

you can also use playbin3 like
gst-launch-1.0 -v playbin3 uri=file:///fullpath/filename
playbin3 is better than playbin

Tonyy

@JoeCFD
sudo apt install gstreamer0.10-plugins-good

This is the message I received:

sudo apt install gstreamer0.10-plugins-good
[sudo] yuying's password:
Reading kit list... Done
Rebuilding dependencies... Complete
Reading status data... Complete
E: Package gstreamer0.10-plugins-good not found
E: Couldn't find any package by glob 'gstreamer0.10-plugins-good'

gst-launch-1.0 -v playbin3 uri=file:///fullpath/filename
This is the message I received:

gst-launch-1.0 -v playbin3 uri=file:///home/yuying/Desktop/autotest/DBManager/Test/2dd98a96-44cb-47da-a229-58bc426e1b10/Video/0.mp4
Set pipeline status to PAUSED...
Pipeline is buffering...
/GstPlayBin3:playbin3-0/GstURIDecodeBin3:uridecodebin3-0: ring-buffer-max-size = 0
/GstPlayBin3:playbin3-0/GstURIDecodeBin3:uridecodebin3-0: buffer-size = -1
/GstPlayBin3:playbin3-0/GstURIDecodeBin3:uridecodebin3-0: buffer-duration = -1
/GstPlayBin3:playbin3-0/GstURIDecodeBin3:uridecodebin3-0: use-buffering = true
/GstPlayBin3:playbin3-0/GstURIDecodeBin3:uridecodebin3-0: download = false
/GstPlayBin3:playbin3-0/GstURIDecodeBin3:uridecodebin3-0: uri = file:///home/yuying/Desktop/autotest/DBManager/Test/2dd98a96-44cb-47da-a229-58bc426e1b10/Video/0.mp4
/GstPlayBin3:playbin3-0/GstURIDecodeBin3:uridecodebin3-0: connection-speed = 0
/GstPlayBin3:playbin3-0/GstURIDecodeBin3:uridecodebin3-0/GstURISourceBin:urisourcebin0: source = "\(GstFileSrc\)\ source"
/GstPlayBin3:playbin3-0/GstURIDecodeBin3:uridecodebin3-0/GstURISourceBin:urisourcebin0/GstTypeFindElement:typefindelement0.GstPad:src: caps = video/quicktime, variant=(string)iso
/GstPlayBin3:playbin3-0/GstURIDecodeBin3:uridecodebin3-0/GstURISourceBin:urisourcebin0/GstTypeFindElement:typefindelement0.GstPad:src: caps = NULL
/GstPlayBin3:playbin3-0/GstURIDecodeBin3:uridecodebin3-0/GstDecodebin3:decodebin3-0/GstParseBin:parsebin0/GstTypeFindElement:typefind.GstPad:src: caps = video/quicktime, variant=(string)iso
"Quicktime demuxer" element does not exist
Error: From /GstPlayBin3:playbin3-0/GstURIDecodeBin3:uridecodebin3-0/GstDecodebin3:decodebin3-0/GstParseBin:parsebin0 element: Your GStreamer is missing a plugin.
Additional debugging information:
gstparsebin.c(3488): gst_parse_bin_expose (): /GstPlayBin3:playbin3-0/GstURIDecodeBin3:uridecodebin3-0/GstDecodebin3:decodebin3-0/GstParseBin:parsebin0:
no suitable plugins found:
Missing parser: Quicktime (video/quicktime, variant=(string)iso)

Error: Pipeline does not want buffering.