i.MX Processors中的主题 Re: Playing back video on Qt5

Playing back video on Qt5

ralph__ — Mon, 16 Feb 2015 19:10:51 GMT

I'm trying to use Qt to play back a video. Here is my code:

// Play a video.

QApplication app(argc, argv);

qDebug("Try to play a video: %s", argv[1]);

QVideoWidget* videoWidget = new QVideoWidget;

videoWidget->setFullScreen(true);

QMediaPlayer* player = new QMediaPlayer;

player->setVideoOutput(videoWidget);

player->setMedia(QUrl::fromLocalFile(argv[1]));

player->play();

videoWidget->show();

return app.exec();

Unfortunately when I execute this code on my iMX6Q board (which normally has no problems using gst-launch to play back video) I end up with a series of static vertical lines appearing on the monitor and no video.

What do I need to do to get video working from Qt?

Here is the output on the console by the way when I try to play back a video using the code above:

# /usr/local/smartfade2/Console /usr/sample720p60_40Mbps.mp4

mxc_sdc_fb fb.26: 1280x720 h_sync,r,l: 40,110,220 v_sync,l,u: 5,5,20 pixclock=74250000 Hz

Try to play a video: /usr/sample720p60_40Mbps.mp4

(gst-plugin-scanner:446): GStreamer-CRITICAL **: gst_element_class_add_pad_template: assertion 'GST_IS_PAD_TEMPLATE (templ)' failed

(gst-plugin-scanner:446): GStreamer-WARNING **: Failed to load plugin '/usr/lib/imx-mm/audio-codec/lib_src_ppp_arm11_elinux.so': /usr/lib/imx-mm/audio-codec/lib_src_ppp_arm11_elinux.so: undefined symbol: src_up2_prefilter_proc

(Console:442): GStreamer-CRITICAL **: gst_object_ref_sink: assertion 'GST_IS_OBJECT (object)' failed

This plugin does not support setParent!

[INFO] Product Info: i.MX6Q/D/S

vpudec versions :smileyhappy:

plugin: 3.0.11

wrapper: 1.0.46(VPUWRAPPER_ARM_LINUX Build on Feb 16 2015 14:50:08)

vpulib: 5.4.23

firmware: 3.1.1.46056

[INFO] bitstreamMode 1, chromaInterleave 1, mapType 0, tiled2LinearEnable 0

Thanks,
Ralph

Re: Playing back video on Qt5

alejandrolozan1 — Mon, 09 Mar 2015 18:05:43 GMT

Hi,

Is it possible that you share your entire application? I would like to reproduce the problem on my side.

Best Regards,

Alejandro

Re: Playing back video on Qt5

ralph__ — Mon, 09 Mar 2015 18:10:02 GMT

It's been a few weeks since I did this, however I think my code was like this:

qDebug("Try to play a video: %s", argv[1]);

QVideoWidget* videoWidget = new QVideoWidget;

videoWidget->setFullScreen(true);

QMediaPlayer* player = new QMediaPlayer;

player->setVideoOutput(videoWidget);

player->setMedia(QUrl::fromLocalFile(argv[1]));

player->play();

videoWidget->show();

Thanks,
Ralph

Re: Playing back video on Qt5

alejandrolozan1 — Tue, 17 Mar 2015 16:59:22 GMT

Hi Ralph,

Would you be nice enough to share an application I can test adn debug?

/Alejandro

Re: Playing back video on Qt5

yuantiantang — Sun, 31 May 2015 09:01:25 GMT

Is this solved?

I faced same problem with slight different output as follows：

QIconvCodec::convertToUnicode: using Latin-1 for conversion, iconv_open failed

QIconvCodec::convertFromUnicode: using Latin-1 for conversion, iconv_open failed

(<unknown>:3577): GStreamer-CRITICAL **: gst_object_ref_sink: assertion `GST_IS_OBJECT (object)' failed

This plugin does not support setParent!

Could not open file

Aiur: 3.0.7

Core: AVI_PARSER_03.05.07 build on Mar 27 2013 10:06:13

mime: video/x-msvideo

file: /usr/lib/imx-mm/parser/lib_avi_parser_arm11_elinux.so.3.1

Content Info:

URI:

file:///root/640x360_mpeg4.mp4

Idx File:

/root/.aiur/.root.640x360_mpeg4.mp4.aidx

Seekable : Yes

Size(byte): 34551532

Movie Info:

Seekable : Yes

Live : No

Duration : 0:03:43.451428000

ReadMode : File

Track : 2

Track 00 [video_000000] Enabled

Duration: 0:03:43.280000000

Language: und

Mime:

video/x-xvid, width=(int)640, height=(int)360, framerate=(fraction)25/1

[INFO] Product Info: i.MX6Q/D/S

vpudec versions :smileyhappy:

plugin: 3.0.7

wrapper: 1.0.35(VPUWRAPPER_ARM_LINUX Build on May 20 2015 07:21:32)

vpulib: 5.4.16

firmware: 2.3.10.40778

Track 01 [audio_000000] Enabled

Duration: 0:03:43.451428000

Language: und

Mime:

audio/mpeg, mpegversion=(int)1, framed=(boolean)true, channels=(int)2, rate=(int

)44100, bitrate=(int)224000

[INFO] bitstreamMode 1, chromaInterleave 1, mapType 0, tiled2LinearEnable 0

Beep: 3.0.7

Core: MP3 decoder Wrapper build on Mar 15 2013 09:57:40

mime: audio/mpeg, mpegversion = (int)1

file: /usr/lib/imx-mm/audio-codec/wrap/lib_mp3d_wrap_arm12_elinux.so

CODEC: BLN_MAD-MMCODECS_MP3D_ARM_02.13.00_CORTEX-A8 build on Dec 5 2012 09:45:19.

Re: Playing back video on Qt5

yuantiantang — Sun, 31 May 2015 09:02:51 GMT

I can give you the application if you need. seems like it can't be attached here.

Re: Playing back video on Qt5

ralph__ — Mon, 01 Jun 2015 15:01:16 GMT

I haven't solved this yet but ended up giving up on this and moving onto a different solution.

Re: Playing back video on Qt5

yuantiantang — Mon, 01 Jun 2015 15:53:14 GMT

What's your solution? Can you share it with me？