Re: Why all the media player error messages?

While there are certainly errors in there, try not to thing of that
stuff as "errors". A lot of it is just informational and very useful.
In fact many of the front ends to command line programs use that output
to know if certain things have happened.

I find mplayer's output particularly useful, in your case it says (some
less interesting stuff trimmed from the top to shorten it):

> VIDEO: [H264] 624x352 24bpp 24.000 fps 200.1 kbps (24.4 kbyte/s)

We get the original video resolution and how many frame per second.

> Clip info:
> major_brand: mp42
> minor_version: 0
> compatible_brands: mp42isomavc1
> creation_time: 2013-04-07 16:52:21
> encoder: HandBrake 0.9.8 2012071800

What container format it's in and what/when it was made.

> Load subtitles in .
> Failed to open VDPAU backend libvdpau_nouveau.so: cannot open shared

You're using the open source nvidia drivers and hardware decoding isn't
supported.

> Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
> Asking decoder to use 4 threads if supported.

FFmpeg is ultimately what is decoding the video, and it sees you have
have a multi core processor and will take advantage of it if able to.

> Selected video codec: [ffh264] vfm: ffmpeg (FFmpeg H.264)

The video's codec is H.264

> Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
> AUDIO: 44100 Hz, 2 ch, s16le, 92.9 kbit/6.59% (ratio: 11618->176400)

The audio is in stereo at 44.1khz encoded at 92kbit/s

> Selected audio codec: [ffaac] afm: ffmpeg (FFmpeg AAC (MPEG-2/MPEG-4
> Audio))

The audio's codec is also being decoded by ffmpeg and is in AAC format.


If your audio and/or video look/sound like crap, that output can quickly
help you figure out why.

It's also very useful when trying to edit or combine videos or find out
if a video is capable of playing back on a certain device.

I'll often times fire up mplayer and immediately quit the playback
because it's output is so useful.

Brian Cluff

On 04/08/2013 12:49 AM, joe@actionline.com wrote:
> Upon trying several different media players from the command line,
> --- smplayer, vlc, kaffeine, dragon, and mplayer ---
> to run the same test video file (myking.m4v), all of them generate
> various error messages, including "No such file or directory."
>
> This is odd because they all find the target file and play it fine.
>
> So why do all these error messages appear and/or how can I stop them?
>
>
>
> == $ smplayer myking.m4v
> This is SMPlayer v. 0.7.0 (SVN r3809) running on Linux
> QInotifyFileSystemWatcherEngine::addPaths: inotify_add_watch failed:
> No such file or directory
>
> == $ vlc myking.m4v
> VLC media player 2.0.1 Twoflower (revision 2.0.1-0-gf432547)
> [0x9712920] main libvlc: Running vlc with the default interface. Use
> 'cvlc' to use vlc w/o interface.
> QInotifyFileSystemWatcherEngine::addPaths: inotify_add_watch failed:
> No such file or directory
> QFileSystemWatcher: failed to add paths: /home/joe/.config/ibus/bus
>
> == $ kaffeine myking.m4v
> QDBusConnection: session D-Bus connection created before
> QCoreApplication. Application may misbehave.
> QDBusConnection: session D-Bus connection created before
> QCoreApplication. Application may misbehave.
> == $ Upon exit, kaffeine shows these two lines:
> QInotifyFileSystemWatcherEngine::addPaths: inotify_add_watch failed:
> No such file or directory
> QFileSystemWatcher: failed to add paths: /home/joe/.config/ibus/bus
>
> == $ dragon myking.m4v
> QPainter::begin: Paint device returned engine == 0, type: 2 (THREE
> MORE TIMES)
> QInotifyFileSystemWatcherEngine::addPaths: inotify_add_watch failed:
> No such file or directory
> QFileSystemWatcher: failed to add paths: /home/joe/.config/ibus/bus
> Setting new source
> New source: QUrl( "file:///home/joe/myking.m4v" )
> Transitioning to state "playing"
> State change
> Moving from "null" 0 to "ready" 1
> Transitioning to state "playing"
> QPainter::begin: Paint device returned engine == 0, type: 2 (FIVE
> MORE TIMES)
> Stream changed to file:///home/joe/myking.m4v
> State change
> Moving from "ready" 1 to "paused" 4
> Stream changed to file:///home/joe/myking.m4v
> State change
> Moving from "paused" 4 to "playing" 2
> Fading to 1
> Transitioning to state "ready"
> State change
> Moving from "playing" 2 to "paused" 4
> (AFTER CTRL+C) (dragon:5855): WARNING **: gstvideo: failed to get
> caps of pad xvimagesink0:sink
> State change
> Moving from "paused" 4 to "ready" 1
> Transitioning to state "ready" (THIS LINE THREE MORE TIMES)
>
> == $ mplayer myking.m4v
> MPlayer2 UNKNOWN (C) 2000-2011 MPlayer Team
> mplayer: could not connect to socket
> mplayer: No such file or directory
> Failed to open LIRC support. You will not be able to use your remote
> control.
> Playing myking.m4v.
> Detected file format: QuickTime/MPEG-4/Motion JPEG 2000 format
> (libavformat)
> [lavf] stream 0: video (h264), -vid 0
> [lavf] stream 1: audio (aac), -aid 0, -alang eng
> VIDEO: [H264] 624x352 24bpp 24.000 fps 200.1 kbps (24.4 kbyte/s)
> Clip info:
> major_brand: mp42
> minor_version: 0
> compatible_brands: mp42isomavc1
> creation_time: 2013-04-07 16:52:21
> encoder: HandBrake 0.9.8 2012071800
> Load subtitles in .
> Failed to open VDPAU backend libvdpau_nouveau.so: cannot open shared
> object file:
> No such file or directory
> [vdpau] Error when calling vdp_device_create_x11: 1
> [ass] auto-open
> Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
> Asking decoder to use 4 threads if supported.
> Selected video codec: [ffh264] vfm: ffmpeg (FFmpeg H.264)
> Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
> AUDIO: 44100 Hz, 2 ch, s16le, 92.9 kbit/6.59% (ratio: 11618->176400)
> Selected audio codec: [ffaac] afm: ffmpeg (FFmpeg AAC (MPEG-2/MPEG-4
> Audio))
> [AO OSS] audio_setup: Can't open audio device /dev/dsp: No such file
> or directory
> AO: [alsa] 44100Hz 2ch s16le (2 bytes per sample)
> Starting playback...
> A: 0.0 V: 0.0 A-V: 0.000 ct: 0.000 0/ 0 ??% ??% ??,?% 0 0
> Movie-Aspect is 1.74:1 - prescaling to correct movie aspect.
> VO: [xv] 624x352 => 624x358 Planar YV12
> A: 4.3 V: 4.3 A-V: 0.000 ct: 0.000 0/ 0 7% 1% 0.8% 0 0
> Exiting... (Quit)
>
>
>
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