Bug 44260 – [Qt] video tag doesn't work in QtWebKit from Qt 4.7-git

• Component: Media
• Status: RESOLVED WONTFIX

[Bernhard Rosenkraenzer]

With the version of QtWebKit included in the Qt 4.7 git repository, the video tag doesn't work.

When going to what appears to e.g.

http://chaos.troll.no/~tavestbo/webkit/mediaelement/

the poster is shown, but the video won't play.

There's minor differences depending on which phonon backend is being used:

phonon-gstreamer: The video simply doesn't play, no indication of what's going on and no indication of what's going on on the console.


phonon-xine: The video doesn't play with no indication of what's going on
Spewage on the console:
params.c:OpenConfFile() - Unable to open configuration file "/home/arklinux/.smb/smb.conf":
        No such file or directory
params.c:OpenConfFile() - Unable to open configuration file "/home/arklinux/.smb/smb.conf.append":
        No such file or directory
Cannot connect to server socket err = Connection refused
Cannot connect to server socket
no message buffer overruns


phonon-mplayer: browser crashes with an assert error inside phonon
Spewage on console:
setAspectRatio Aspect ratio: 0 
objectDescriptionIndexes 
objectDescriptionProperties 
objectDescriptionIndexes 
objectDescriptionProperties 
subtitleAdded 
subtitleChanged New current subtitle: "None" 
startConnectionChange 
startConnectionChange Node: Phonon::MPlayer::MediaObject 
startConnectionChange Node: Phonon::MPlayer::VideoWidget 
connectNodes Phonon::MPlayer::MediaObject Phonon::MPlayer::VideoWidget 
endConnectionChange 
endConnectionChange Node: Phonon::MPlayer::MediaObject 
endConnectionChange Node: Phonon::MPlayer::VideoWidget 
startConnectionChange 
startConnectionChange Node: Phonon::MPlayer::MediaObject 
startConnectionChange Node: Phonon::MPlayer::AudioOutput 
connectNodes Phonon::MPlayer::MediaObject Phonon::MPlayer::AudioOutput 
endConnectionChange 
endConnectionChange Node: Phonon::MPlayer::MediaObject 
endConnectionChange Node: Phonon::MPlayer::AudioOutput 
setSource Source: "http://chaos.troll.no/~tavestbo/webkit/mediaelement/micmacs.sd.m4v" 
loadMedia "http://chaos.troll.no/~tavestbo/webkit/mediaelement/micmacs.sd.m4v" 
sendMPlayerCommand Error: MPlayer process not running 
resizeEvent Resize: QSize(0, 0) 
resizeEvent Resize: QSize(640, 426) 
MPlayerConfig Config file: "/home/arklinux/.config/phonon-mplayer/phonon-mplayer.conf" 
MPLAYER start Process started: "mplayer" "-identify -frames 0 -vo null -ao null http://chaos.troll.no/~tavestbo/webkit/mediaelement/micmacs.sd.m4v" 
MPLAYER MPlayer UNKNOWN-4.5.1 (C) 2000-2010 MPlayer Team 
MPlayer is from  "2010" 
MPLAYER 159 audio & 341 video codecs 
MPLAYER Playing http://chaos.troll.no/~tavestbo/webkit/mediaelement/micmacs.sd.m4v. 
MPLAYER Resolving chaos.troll.no for AF_INET6... 
MPLAYER parseLine Resolving: "chaos.troll.no for AF_INET6" 
MPLAYER Couldn't resolve name for AF_INET6: chaos.troll.no 
MPLAYER Resolving chaos.troll.no for AF_INET... 
MPLAYER parseLine Resolving: "chaos.troll.no for AF_INET" 
MPLAYER Connecting to server chaos.troll.no[62.70.27.122]: 80... 
MPLAYER parseLine Connecting: "chaos.troll.no[62.70.27.122]: 80" 
stateChangedInternal BufferingState 
MPLAYER Cache size set to 320 KBytes 
MPLAYER Cache fill:  0.00% (0 bytes) 
MPLAYER parseLine Cache %: 0 "0.00" 
MPLAYER libavformat file format detected. 
MPLAYER ID_AUDIO_ID=0 
MPLAYER ID_AID_0_LANG=eng 
MPLAYER parseLine Audio id: 0 attr: "LANG" value: "eng" 
audioChannelAdded 
MPLAYER [lavf] stream 0: audio (aac), -aid 0, -alang eng 
MPLAYER ID_VIDEO_ID=0 
MPLAYER parseLine Video: true 
MPLAYER [lavf] stream 1: video (h264), -vid 0 
MPLAYER VIDEO:  [H264]  480x200  24bpp  23.976 fps  756.7 kbps (92.4 kbyte/s) 
MPLAYER Clip info: 
MPLAYER major_brand: M4VP 
MPLAYER ID_CLIP_INFO_NAME0=major_brand 
MPLAYER ID_CLIP_INFO_VALUE0=M4VP 
MPLAYER minor_version: 1 
MPLAYER ID_CLIP_INFO_NAME1=minor_version 
MPLAYER ID_CLIP_INFO_VALUE1=1 
MPLAYER compatible_brands: M4VPM4A mp42isom 
MPLAYER ID_CLIP_INFO_NAME2=compatible_brands 
MPLAYER ID_CLIP_INFO_VALUE2=M4VPM4A mp42isom 
MPLAYER copyright: © 2010 Sony Pictures Classics. All Rights Reserved 
MPLAYER parseLine Clip copyright: "© 2010 Sony Pictures Classics. All Rights Reserved" 
MPLAYER ID_CLIP_INFO_NAME3=copyright 
MPLAYER ID_CLIP_INFO_VALUE3=© 2010 Sony Pictures Classics. All Rights Reserved 
MPLAYER comment: Encoded and delivered by trailers.apple.com 
MPLAYER parseLine Clip comment: "Encoded and delivered by trailers.apple.com" 
MPLAYER ID_CLIP_INFO_NAME4=comment 
MPLAYER ID_CLIP_INFO_VALUE4=Encoded and delivered by trailers.apple.com 
MPLAYER title: Micmacs 
MPLAYER parseLine Clip title: "Micmacs" 
MPLAYER ID_CLIP_INFO_NAME5=title 
MPLAYER ID_CLIP_INFO_VALUE5=Micmacs 
MPLAYER ID_CLIP_INFO_N=6 
MPLAYER ID_FILENAME=http://chaos.troll.no/~tavestbo/webkit/mediaelement/micmacs.sd.m4v 
MPLAYER ID_DEMUXER=lavfpref 
MPLAYER ID_VIDEO_FORMAT=H264 
MPLAYER ID_VIDEO_BITRATE=756696 
MPLAYER ID_VIDEO_WIDTH=480 
MPLAYER parseLine Video width: 480 
MPLAYER ID_VIDEO_HEIGHT=200 
MPLAYER parseLine Video height: 200 
MPLAYER ID_VIDEO_FPS=23.976 
MPLAYER parseLine Video FPS: 23.976 
MPLAYER ID_VIDEO_ASPECT=0.0000 
MPLAYER parseLine Video aspect: 2.4 
MPLAYER ID_AUDIO_FORMAT=MP4A 
MPLAYER ID_AUDIO_BITRATE=127944 
MPLAYER ID_AUDIO_RATE=44100 
MPLAYER ID_AUDIO_NCH=2 
MPLAYER ID_START_TIME=0.00 
MPLAYER ID_LENGTH=128.17 
MPLAYER parseLine Media total time: 128169 
MPLAYER ID_SEEKABLE=1 
MPLAYER parseLine Media seekable: true 
MPLAYER ID_CHAPTERS=0 
MPLAYER ========================================================================== 
MPLAYER Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family 
MPLAYER Selected video codec: [ffh264] vfm: ffmpeg (FFmpeg H.264) 
MPLAYER ========================================================================== 
MPLAYER ID_VIDEO_CODEC=ffh264 
MPLAYER ========================================================================== 
MPLAYER Opening audio decoder: [faad] AAC (MPEG2/4 Advanced Audio Coding) 
MPLAYER AUDIO: 44100 Hz, 2 ch, s16le, 127.9 kbit/9.07% (ratio: 15993->176400) 
MPLAYER ID_AUDIO_BITRATE=127944 
MPLAYER ID_AUDIO_RATE=44100 
MPLAYER ID_AUDIO_NCH=2 
MPLAYER Selected audio codec: [faad] afm: faad (FAAD AAC (MPEG-2/MPEG-4 Audio)) 
MPLAYER ========================================================================== 
MPLAYER AO: [null] 44100Hz 2ch s16le (2 bytes per sample) 
MPLAYER ID_AUDIO_CODEC=faad 
MPLAYER Starting playback... 
MPLAYER Exiting... (End of file) 
MPLAYER parseLine End of file detected 
MPLAYER ID_EXIT=EOF 
MPLAYER finished Bytes still available: 0 
MPLAYER finished Process ended: exitCode: 0 exitStatus: 0 
MPLAYER finished MPlayer process exited normally 
stateChangedInternal ErrorState 
play 
subtitleAdded 
subtitleChanged New current subtitle: "None" 
MPLAYER readMediaSettings 
MPLAYER 
MPLAYER 
MPLAYER 
MPLAYER start Process started: "mplayer" "-noquiet -slave -identify -msglevel demux=6 -framedrop -nokeepaspect -zoom -colorkey 0x020202 -monitorpixelaspect 1 -contrast 0 -brightness 0 -hue 0 -saturation 0 -volume 100 -prefer-ipv4 -ass -embeddedfonts -nomouseinput -sub-fuzziness 1 -input nodefault-bindings:conf=/dev/null -include ~/.mplayer/config -wid 18875233 http://chaos.troll.no/~tavestbo/webkit/mediaelement/micmacs.sd.m4v" 
MPLAYER MPlayer UNKNOWN-4.5.1 (C) 2000-2010 MPlayer Team 
MPLAYER 159 audio & 341 video codecs 
MPLAYER Playing http://chaos.troll.no/~tavestbo/webkit/mediaelement/micmacs.sd.m4v. 
MPLAYER Resolving chaos.troll.no for AF_INET... 
MPLAYER parseLine Resolving: "chaos.troll.no for AF_INET" 
MPLAYER Connecting to server chaos.troll.no[62.70.27.122]: 80... 
MPLAYER parseLine Connecting: "chaos.troll.no[62.70.27.122]: 80" 
stateChangedInternal BufferingState 
MPLAYER Cache size set to 320 KBytes 
ASSERT: "streamInterface" in file phonon/phonon/abstractmediastream.cpp, line 100


phonon-vlc: video area remains black, but the controls look like something is playing - e.g. the time indicator goes all the way to 2:08
Spewage on console:
add aout  default 
add aout  alsa 
add aout  oss 
add aout  aout_file 
add aout  aout_sdl 
add aout  dummy 
setSource 
setSource yeap, 'tis a local file or url "http" 
stateChangedInternal newState: "BufferingState" previousState: "StoppedState" 
loadMediaInternal "http://chaos.troll.no/~tavestbo/webkit/mediaelement/micmacs.sd.m4v" 
stateChangedInternal newState: "StoppedState" previousState: "BufferingState" 
stateChangedInternal newState: "PausedState" previousState: "StoppedState" 
resizeEvent QSize(300, 150) 
setVolume Volume changed to -  100  From  50 
resizeEvent QSize(640, 426) 
play 
updateMetaData(): artist:  
updateMetaData(): title: http://chaos.troll.no/~tavestbo/webkit/mediaelement/micmacs.sd.m4v 
stateChangedInternal newState: "PlayingState" previousState: "PausedState" 
updateVolume Volume changed to -  50  From  50 
updateDuration Length changing from  0  to  128174 
updateMetaData(): artist:  
updateMetaData(): title: Micmacs 
stateChangedInternal newState: "PlayingState" previousState: "PlayingState" 
ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:4170:(_snd_config_evaluate) function snd_func_card_driver returned error: No such device
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4170:(_snd_config_evaluate) function snd_func_concat returned error: No such device
ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
ALSA lib conf.c:4170:(_snd_config_evaluate) function snd_func_refer returned error: No such device
ALSA lib conf.c:4649:(snd_config_expand) Evaluate error: No such device
ALSA lib pcm.c:2229:(snd_pcm_open_noupdate) Unknown PCM default
[0x7f042c006af0] main audio output error: Potential ALSA version problem
[0x7f042c006af0] main audio output error: VLC failed to initialize your sound output device (if any).
Please update alsa-lib to version 1.0.23-2-g8d80d5f or higher to try to fix this issue.
ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:4170:(_snd_config_evaluate) function snd_func_card_driver returned error: No such device
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4170:(_snd_config_evaluate) function snd_func_concat returned error: No such device
ALSA lib confmisc.c:1251:(snd_func_refer) error evaluating name
ALSA lib conf.c:4170:(_snd_config_evaluate) function snd_func_refer returned error: No such device
ALSA lib conf.c:4649:(snd_config_expand) Evaluate error: No such device
ALSA lib pcm.c:2229:(snd_pcm_open_noupdate) Unknown PCM default
videoWidgetSizeChanged video width 480 height: 199 
stateChangedInternal newState: "PlayingState" previousState: "PlayingState" 
[0xe3f6b0] main input error: ES_OUT_SET_(GROUP_)PCR  is called too late (pts_delay increased to 1200 ms)
[0xe3f6b0] main input error: ES_OUT_SET_(GROUP_)PCR  is called too late (pts_delay increased to 1277 ms)
[0xe3f6b0] main input error: ES_OUT_SET_(GROUP_)PCR  is called too late (pts_delay increased to 1448 ms)
[0xe3f6b0] main input error: ES_OUT_SET_(GROUP_)PCR  is called too late (pts_delay increased to 5273 ms)
Missing reference picture
decode_slice_header error
Missing reference picture
decode_slice_header error
mmco: unref short failure




I have verified that phonon and the backends in general do work (e.g. downloading the video referenced by the page and playing it with DragonPlayer works with all backends) - just not inside QtWebKit.


On a side note: the styling given in the page ("background-color:magenta") is shown initially, but as soon as the poster image is loaded, the colors on the controls revert to their usual transparent gray.

[Benjamin Poulain]

We are working on new backends based on QtMultimedia. Hopefully this will solve the issues with the media elements on Linux.

I close the task as we are not actively maintaining the Phonon backend anymore. If you want to make patches just comment and we'll reopen it.