Re: [LAD] [LAA] gst123-0.1.2
Hi! On Wed, Jul 07, 2010 at 12:42:38PM -0700, Niels Mayer wrote: Thanks for your help and response... FYI, here's a few bug reports/feature-missing things: (1) I finally figured out those flashing squares that appear every time gst123 changes songs. It's album-art images, displayed in an X window! These need to stay up longer, as only by forcing the audio device to be busy and playing back a giant directory of files, I was able to actually see that these are windows containing images, and not some weird new display-glitching bug caused by KDE's Smooth Tasks widget. To be useful, the display of the image needs to be held for a certain amount of time after you're sure the window-system has actually rendered the image. Perhaps a single integer option --albumart-time -- when set to 0 image display is suppressed, otherwise, an integer like 1000 which would hold the album-art image for 1 second. (And yes, I realize that a fix for this issue is easily had in my script play-cd (shorthand for play sound only @ 44.1, vs play-tv w/ X/Video @ 48k): | #!/bin/sh | args=`/bin/ls -d $*` | export DISPLAY='' | exec gst123 -a alsa=mythcd $args ) I didn't explicitely do anything to make the pictures come up. Its just that gst123 will try to decode everything that is on the play list, audio files, video files and other files. Normally other files are not a problem, because gst123 will detect that it can not read the file, and remove it from the playlist. However, GStreamer will decode images like album art, so they are flashing up, and once the decoding is done disappear again. I am not sure yet how to fix this. One could simply blacklist some filename patterns (like *.jpg, *.png, ...), but then again, a file called this way could theoretically contain an ogg file. Also the blacklist might not be complete. So what would be better would be to use the same strategy GStreamer uses to figure out the right decoding object, and then blacklist some of those. In any case, I've added this item to the TODO, and of course I'll also accept patches. (2) Sometimes video windows come up at the wrong size (tiny). You can resize them with the window manager and resize it back and get the correct aspect. Or you can quit and run it again and find it sized correctly. I had hoped that this would no longer be an issue, because of the changes that I made some time ago. But if it is still happening, it should be fixed. You also may be able to correct this using the 1 or f keys. I've added this item to the TODO. (3) Is there a way to create a specific, stable, window-name for the video window created, perhaps settable as commandline parameter. That way for captions, you don't really need to worry about overwriting the video with transparent letters like you would on an actual TV caption. Instead, wrap your program in an external program such as Python, or WINTERP (*) that captures the video window (much like a window manager would, or how mplayer windows are displayed insider wrappers like smplayer kmplayer etc) and parses the time-data-stream information continuously output by gst123. Below the video window you stick a text widget and display caption text independently of the video. There's really no need to overlay and worry about transparency mapping through letters and slowing down the rendering, and all that potential, hardware-dependent fail. Stick the text in a GUI toolkit where all the region and language issues can be handled appropriately... Such tools are happy to update a few times a second to display new captions while X is off rendering the video (or stepping out of the way) in the most efficient, platform-independent manner available. Right, it might be nice to have a window title parameter which can contain some special sequences (like %f for the filename being played, or %t and %T for time and total time), so that the window title can be used to output something useful. However, I think that gst123 should be able to display seek position without any extra programs, because most users will just install gst123 and use it as it is. About winterp: looks like a program which could be used to do some interesting things. However, I would recommend using something else as scripting language, not scheme. My experience with scheme is that it is so totally unlike most programming languages, that you need to think a lot more to get anything done or understand any code, even if you are normally good at programming. Python might be a better choice, because it doesn't have such a different structure than C / C++ / Java (which many programmers know already). Cu... Stefan -- Stefan Westerfeld, Hamburg/Germany, http://space.twc.de/~stefan ___ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org http://lists.linuxaudio.org/listinfo/linux-audio-dev
Re: [LAD] [LAA] gst123-0.1.2
Hi! On Tue, Jul 06, 2010 at 06:08:23PM -0700, Niels Mayer wrote: On Tue, Jul 6, 2010 at 2:43 PM, Niels Mayer nielsma...@gmail.com wrote: Question: is there a way to disable checking for pulseaudio for each new file when specifying multiple media files. e.g.: gst123 *.ogg ? For example: do it once at application startup, or even better, a way to prevent it from happening all-together via environment variable, configuration, etc. Best would be some kind of environmental check so that the timeout on socket needn't occur.The timeout significantly slows down operation of the program even when not issuing ^C's. Answering own question: The search for audio devices is bypassed by setting the -a commandline parameter to the ALSA device one wants to use. I wrapped it in a script to use w/ emacs' dired, etc.: #!/bin/sh args=`/bin/ls -d $*` exec gst123 -a alsa=mythcd $args /dev/null The next release, gst123-0.1.3 will have a ~/.gst123rc where you can put audio_output alsa=mythcd which does the thing you want. The changes are in git already. I've used scripts to wrap gst123 before (for crawling directories with find), but usually its better to put the functionality in gst123, because then its available to all users (not just competent script writers). Cu... Stefan -- Stefan Westerfeld, Hamburg/Germany, http://space.twc.de/~stefan ___ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org http://lists.linuxaudio.org/listinfo/linux-audio-dev
Re: [LAD] [LAA] gst123-0.1.2
Hi! On Tue, Jul 06, 2010 at 02:43:11PM -0700, Niels Mayer wrote: On Mon, Jul 5, 2010 at 9:11 AM, Stefan Westerfeld ste...@space.twc.de wrote: gst123-0.1.2 has been released. Website: http://space.twc.de/~stefan/gst123.php Download: http://space.twc.de/~stefan/gst123/gst123-0.1.2.tar.bz2 Stefan -- very nice and useful program. Thanks for making this available! FYI -- To compile on Fedora, I had to install the following to get 'configure' to stop complaining: 1) yum install 'gstreamer-devel' (obviously) 2) yum install gstreamer-plugins-base-devel (less obvious as config complains: No package 'gstreamer-interfaces-0.10' found // No package 'gstreamer-video-0.10' found ) 3) yum install ncurses-devel gst123 should normally point you to Debian packages if it doesn't find something, although currently it only does this for ncurses. I am not yet sure how to make configure.ac print out the right thing to install depending on the distribution. But I'd accept patches that solve this. Question: is there a way to disable checking for pulseaudio for each new file when specifying multiple media files. e.g.: gst123 *.ogg ? If at all, this could be fixed in GStreamer pulseaudio support. Except for the .gst123rc entry we already discussed. (2) For HD Video recorded off digital broadcasts, but not for regular def broadcast video, there's a problem when issuing the '-' (forward arrow) or '-' (backward arrow) commands to skip forwards or back: As you go forward, there's an increasingly longer delay before the audio syncs up and starts playing. Hit '-' a few times and the audio never seems to sync up, and sometimes the video stays paused on the same frame, even though the time display in the terminal continues updating. This also sounds to me like a GStreamer bug - probably you should repost the question on a GStreamer mailing list. gst123 is just a very thin wrapper that uses GStreamer for actual seeking and decoding, so if there is something wrong with some files, the most likely thing is that the corresponding GStreamer plugins need to be fixed. (3) Note that if the above file is played out of a list 'gst123 *.mpg' then at least it gets audio playback. The same file, started standalone, shows video, but gives plays no audio: . gnulem-346-~ gst123 /home/npm/Videos/1551_20100407195900.mpg Playing file:///home/npm/Videos/1551_20100407195900.mpg ** (gst123:12323): CRITICAL **: gst_mpeg_descriptor_find: assertion `desc != NULL' failed Looks like a GStreamer issue, too. PS: Feature request: decode caption information from videos, and display in video. And/or output a timed-text, SMIL or other file containing the caption information and time-of-presentation information. This can be very useful in searching content of video files. I would accept patches for this one. Currently, I don't know what needs to be done to display anything on top of the video display. Could be that it can be done at Gtk level (we already have a Gtk window where we display things in), could also be that overlaying text or other information needs to be done with GStreamer somehow. Personally, I'd like to have a visual indication of the stream position during seek (and that is on the TODO), and once gst123 has the capability to draw on top of the video display, other stuff could be added. Cu... Stefan -- Stefan Westerfeld, Hamburg/Germany, http://space.twc.de/~stefan ___ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org http://lists.linuxaudio.org/listinfo/linux-audio-dev
Re: [LAD] [LAA] gst123-0.1.2
Thanks for your help and response... FYI, here's a few bug reports/feature-missing things: (1) I finally figured out those flashing squares that appear every time gst123 changes songs. It's album-art images, displayed in an X window! These need to stay up longer, as only by forcing the audio device to be busy and playing back a giant directory of files, I was able to actually see that these are windows containing images, and not some weird new display-glitching bug caused by KDE's Smooth Tasks widget. To be useful, the display of the image needs to be held for a certain amount of time after you're sure the window-system has actually rendered the image. Perhaps a single integer option --albumart-time -- when set to 0 image display is suppressed, otherwise, an integer like 1000 which would hold the album-art image for 1 second. (And yes, I realize that a fix for this issue is easily had in my script play-cd (shorthand for play sound only @ 44.1, vs play-tv w/ X/Video @ 48k): | #!/bin/sh | args=`/bin/ls -d $*` | export DISPLAY='' | exec gst123 -a alsa=mythcd $args ) (2) Sometimes video windows come up at the wrong size (tiny). You can resize them with the window manager and resize it back and get the correct aspect. Or you can quit and run it again and find it sized correctly. (3) Is there a way to create a specific, stable, window-name for the video window created, perhaps settable as commandline parameter. That way for captions, you don't really need to worry about overwriting the video with transparent letters like you would on an actual TV caption. Instead, wrap your program in an external program such as Python, or WINTERP (*) that captures the video window (much like a window manager would, or how mplayer windows are displayed insider wrappers like smplayer kmplayer etc) and parses the time-data-stream information continuously output by gst123. Below the video window you stick a text widget and display caption text independently of the video. There's really no need to overlay and worry about transparency mapping through letters and slowing down the rendering, and all that potential, hardware-dependent fail. Stick the text in a GUI toolkit where all the region and language issues can be handled appropriately... Such tools are happy to update a few times a second to display new captions while X is off rendering the video (or stepping out of the way) in the most efficient, platform-independent manner available. Niels http://nielsmayer.com PS: (*) I just got my old dead opensource project http://nielsmayer.com/winterp/ ( ftp://ftp.x.org/contrib/devel_tools/winterp.lsm ) 99%fully running/ported to the latest Linux/Gcc/X courtesy of PlanetCCRMA having the following packages openmotif-2.3.2-5.1.svn.fc12.ccrma.x86_64 openmotif-devel-2.3.2-5.1.svn.fc12.ccrma.x86_64 ... one of the nice things it provides (and I'm happy i'll no longer need to supply my own version-of) is expect-5.43.0-19.fc12.x86_64 -- a portable way to talk to existing tty-based programs as if they were running it a terminal. Except they're not actually running in a terminal, they're being controlled by a GUI. Probably nothing more than anybody does with Python, or Java, or Ruby, or Perl, or ... these days ... however, for line-based, or s-expression-based results (e.g. multiple lisp or scheme-based systems talking to each other) the asynchronous subprocess facility WINTERP provides is potentially more elegant for the application writer comfortable with putting parentheses before the functor. Anyways, w/o taking up much of my time, I want to put it up on sourceforge, salvage the interesting parts, and see what happens -- at this point as yet another background task/distraction. However running code speaks, and this is running code. I'm just happy to have some simple winterp-based utilities back and running again: win-grep ( http://nielsmayer.com/winterp/scrnsnaps/grep-br.gif ) and win-dircmp ( http://nielsmayer.com/winterp/scrnsnaps/dircmp.gif ). And for doing music/midi stuff, the XmGraph widget can't be beat: it's quite awesome in interactive mode, as well as its intelligent graph layout: http://nielsmayer.com/winterp/scrnsnaps/graphcalc.gif http://nielsmayer.com/winterp/scrnsnaps/grph-whier.gif ( http://nielsmayer.com/winterp/examples/grph-whier.lsp ) http://nielsmayer.com/wwweasel/node24.htm ). ANd lets not forget WINTERP's path-based-animation facilities to make arbitrary interactive controllers and displays (beyond what a prebuilt widget' might provide) that move smoothly with built-in double-buffering: http://nielsmayer.com/winterp/scrnsnaps/xtango/hanoi.gif http://nielsmayer.com/winterp/scrnsnaps/xtango/test-dial.gif http://nielsmayer.com/winterp/scrnsnaps/xtango/test-gauge.gif http://nielsmayer.com/winterp/scrnsnaps/xtango/test-knob.gif ... FYI, this is all it takes to talk to an asynchronous subprocess -- such as runningcontrolling gst123 ... http://nielsmayer.com/winterp/examples/subcalc.lsp (simple UI to run bc as an
Re: [LAD] [LAA] gst123-0.1.2
I forwarded my message on compiling gst123 to the fedora and ccrma lists. Got a question about using it in Emacs dired style... others may find my response helpful: orig: http://ccrma-mail.stanford.edu/pipermail/planetccrma/2010-July/017010.html - Thanks for reminding me to test this feature. In xemacs (*), it works nicely allowing playback of any media i've thrown at it Using dired, find the desired file and use keyboard command '!' (shell command on files), giving gst123 as the command. The file will play but will do so in the foreground. To stop it, issue a C-g . The *Shell-Command-Output-Buffer* will contain the following (while playing audio track for http://www.youtube.com/watch?v=AI8NuFAETMQ ). Playing file:///home/npm/Music/Tonight_You_Belong_To_Me.mp3 socket(): Address family not supported by protocol Title : Tonight You Belong To Me Artist : Steve Martin and Bernadette P Album : The Jerk Genre : Comment : Date: 1979 Codec : MPEG 1 Audio, Layer 3 (MP3) ( Bitrate : 256.0 kbit/s Time: 0:00:00.09 of 0:01:59.45 ... You can multiple select files as well and then issue command '!' and it should play through the list of selected media. However, since it plays in the foreground and makes emacs unresponsive, you could also start it in the background through a script and tell it to be less verbose, set desired audio interface, etc: gst123 [OPTION...] URI... - Play video and audio clips -@, --list=filename read playlist of files and URIs from filename --version print version --verbose print GStreamer pipeline used to play files -z, --shuffle play files in pseudo random order -x, --novideo do not play the video stream -a, --audio-output=driver[=dev] set audio output driver and device --display=DISPLAY X display to use Note that it'll playback web clips from the command-line too. With ALSA setup per http://nielsmayer.com/dot-asoundrc.txt (nb: device mythtv sets up my mobo's SPDIF out at 48k): gst123 -a alsa=mythtv http://nielsmayer.com/bm03/freeland-at-solsystem.avi Playing http://nielsmayer.com/bm03/freeland-at-solsystem.avi Comment : Date: 2003 Codec : Uncompressed 8-bit PCM audio (audio) Motion JPE Bitrate : 0.0 kbit/s Niels http://nielsmayer.com (*): xemacs-packages-extra-el-20090217-7.fc12.noarch xemacs-packages-base-el-20090217-4.fc12.noarch xemacs-el-21.5.29-11.fc12.x86_64 xemacs-packages-extra-20090217-7.fc12.noarch flim-xemacs-1.14.8-5.fc12.noarch xemacs-21.5.29-11.fc12.x86_64 xemacs-packages-extra-info-20090217-7.fc12.noarch xemacs-info-21.5.29-11.fc12.noarch xemacs-common-21.5.29-11.fc12.x86_64 xemacs-packages-base-20090217-4.fc12.noarch w3m-el-xemacs-1.4.371-0.1.20091119cvs.fc12.noarch ___ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org http://lists.linuxaudio.org/listinfo/linux-audio-dev
Re: [LAD] [LAA] gst123-0.1.2
On Tue, Jul 6, 2010 at 2:43 PM, Niels Mayer nielsma...@gmail.com wrote: Question: is there a way to disable checking for pulseaudio for each new file when specifying multiple media files. e.g.: gst123 *.ogg ? For example: do it once at application startup, or even better, a way to prevent it from happening all-together via environment variable, configuration, etc. Best would be some kind of environmental check so that the timeout on socket needn't occur.The timeout significantly slows down operation of the program even when not issuing ^C's. Answering own question: The search for audio devices is bypassed by setting the -a commandline parameter to the ALSA device one wants to use. I wrapped it in a script to use w/ emacs' dired, etc.: #!/bin/sh args=`/bin/ls -d $*` exec gst123 -a alsa=mythcd $args /dev/null -- Niels http://nielsmayer.com ___ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org http://lists.linuxaudio.org/listinfo/linux-audio-dev
