The task was quite easy to convert a bunch of video files in a Folder to webm format .
There are several free so called free software who announce to do that but most are bumpy and even my so loved miro convertor produce a webm files that don’t play in google chrome . the ffmpeg package inside was outdated.
First check if you have ffmpeg installed on your mac , open the terminal and enter
ffmpeg -v
to get the version or
wich ffmpeg
to get the path where its installed
SINGEL WEBM CONVERT WITH FFMPEG
To Convert a single mp4 video file we start with this ffmpeg command
Markup : ffmpeg -i INPUT File Use acodec Libvorbis AC QMAX : qmax and qmin are the‘quality-ranges’in which you define to encode. Expect that higher the values the lower the quality.
qmin 50 an qmax 51 gives the lowest quality
qmin 0 -qmax 1 gives the highest quality
If we need aditional mp4 files from our quiteime mov file we can use this ffmpeg command. The command line can alos replaced in our batch file below .
Since we have several quicktime mov video files we write a little bash script to to automate this .
#!/bin/bash
for i in *.mov;
do name=`echo $i | cut -d'.' -f1`;
echo $name;
ffmpeg -i "$i" -acodec libvorbis -aq 5 -ac 2 -qmax 25 -threads 2 "${name}.webm";
done
Edit this file with any text editor or code editor like sublime Text . Save it in the folder where your videos are in my case saved as
webmconvert
Now we need to chmod the file to make it executable
CHMOD 700 webmconvert
Thats it the basch script takes every video from the folder and convert it to a webml video that plays nice in your HTML5 video player .
Now start the bash script with
./webmconvert
The first line #!/bin/bash tells the terminal that we are using bash shell, we loop all files with ending mov output echo the name and save it with the same name as webm.
Problems when installing Node on OSX with brews, the default node path on OSX. For some reason my node modules where all installed in /Users/[homedir]/.npm_packages and Node Modules end up here
/Users/[homedir]/.npm_packages/lib/.node_modules
This result in a lot of errors when i try to install JS-Minify for Sublime Text. special if i install modules Globally.
This is a BlogLog post to reproduce the path if sometime a similar Error occurs in my node environment. At the end you find the stackoverflow links who helped to solve most problems
Installing node through Homebrew can cause problems with npm for globally installed packages. .
$ rm -rf /usr/local/lib/node_modules
$ brew uninstall node
$ brew install node --without-npm
$ echo prefix=~/.npm-packages >> ~/.npmrc
$ curl -L https://www.npmjs.com/install.sh | sh
</code></p>
<p>to the new npm to PATH environment variable
<code class="prettyprint">$ export PATH="$HOME/.npm-packages/bin:$PATH"</code></p>
<p>To make the new Path permanent we add it to our .bash_profile add following line
<code>
#NODE GLOBAL PATH
PATH=$HOME/.npm-packages/bin:$PATH
</code></p>
<p>Reload the bash in Terminal</p>
<p><code>source ~/.bash_profile</code></p>
<p>Check PATH
<code>$ echo $PATH</code></p>
<p>Edit $PATH</p>
<p><span>vi $HOME/.bash_profile</span></p>
<h2>NODE Commands:</h2>
<p><code>$ npm config get prefix</code></p>
<p><strong><em>Show Version</em></strong></p>
<p>$ npm -v</p>
<p><strong><em>Show node Version</em></strong></p>
<p><span>$ node –version </span></p>
<p><em><strong>Get Path where NPM is installed</strong></em></p>
<pre class="lang-js prettyprint prettyprinted"><code><span class="pln">$ npm config </span><span class="kwd">get</span><span class="pln"> prefix</span></code>
Set the nvm default Dir DONT use Sudo
$ npm config set prefix /usr/local
List Global NPM Packages
$ npm list -g
Will show the global installation root regardless of current working directory.
Try to debug the Trello 2 WordPress Plugin , a wonderful idea but sadly the Plugin is not updated or supported by the developer now for quite a time .
Why is the concept of using a Trello board to edit & rearrange content on your website sweet ? Trello offers a very intuitive drag and drop style card system with a json api . This way we can reorganise content by simply dragging it from one place to a other we can assign multiple user to the board as editor , no WordPress skills or admin Editor rights are needed.
What the Plugin supports : Trello List and Cards
Shortcut Parameter : ID , type , link
How to find the Trello Board ID
To get temporary get the plugin work on the front end If your Board have a link like
What works : The authentication with your Trello account. REndering of your trello content with minimal styles – here is some work to do to make it realy sweet
What don’t works : The Selection of a Trello Card or Board ID in the admin section .
Trello API : Reffernce https://developers.trello.com/advanced-reference/board
Solution : Was to simple to believe , after a lot of code change and Trello APi Responds later . You need a Organization in your trello Board. as my Board was Private only the Plug don’t work in this mode and fail to update the Trello Ids in the admin screen .
Now its time to make something beautiful out of the simple links .
Saved Facebook Posts from Treallo
Recommended Twitter Follower from Trello
Team Post Planing from Trello with WP Front end
Google Material Cards from trello
Dynamic Member User List Sortable from Trello
Idea Board
ect
Test Cards from Trello embedded with the shortlink
Just a shoot note about video streaming with a Video Editor and MLT Framework. Why a Video Editor for
Why a Video Editor for streaming ?
On the fly dynamic re-editing or adding content to the Video based on the interaction of the user with a simple user interface of a Video Editor.
The Editor Shotcuts backend is based on MLT a highly aktive edeveloped Video Framework . Shotcut can be easy intergrated into a CasparCG workflow. Supported stream format
Work path for Mac Screen recording with VLC screen recording per command line to a Social Platform via FFmpeg. The task: I’m looking for is to capture the screen with VLC Command line and stream the result with FFmpeg as video RTSP live stream to Facebook youtube or any other Platform without the need of additional expensive or complicated software. Some Examples can be found for Linux but not so much for MAC, it should work for El Capitan. This is mostly a work log . Here I will document what worked for me and what problems occur. Later on allow those snippets to create a bash script to auto stream on an interval to facebook for example a Birdsnest, Weather camera, or any IPTV Camera . Even some simple Video Effect Switcher like CAmTwist can be used to stream and manage video sources for the Facebook Lifestream.
The idea behind is that sometimes you need to stream some short piece of video where a full Stream software like Wirecast or OBS is an Overkill . One core reason Live stream is very CPU process intensive the less additional software you run the more you have to process and stream your Video.It makes streaming with the desktop so simple once the procedure is ready.
We use a minimum screen-top of 50 to hide the chromee browserr navigation and some mac offset vlc screen:// -I rc --screen-fps 25 --screen-index 1 --screen-width 500 --screen-height 500 --screen-top 50 --screen-left 0 ":sout=#transcode{vcodec=h264}:std{access=file,dst=metaCropout3.mp4"}
This will add the Recording into the virtual playlist Que of our VLC CLI , to start capturing we need the command play and quit to stop the stream .
VLC CLI Parameter
To limit the area being captured we add parameter to the screen
Video crop (right,left,top,bottom) Number of pixels to crop at the right of the video.
--screen-index 1 --screen-width 500 --screen-height 500 --screen-top 95 --screen-left 0
One example we will capture a screen at 25 fps – cropping 500 x 500 the top, left ZERO , a window at the top left of our screen where we can place what we whant to show without the Chrome & mac window boarders.
The output video is encoded into mp4 video as file “metaout.mp4” into the same dir you CD in the Terminal .
vlc screen:// -I rc --screen-fps 25 --screen-index 1 --screen-width 500 --screen-height 500 --screen-top 95 --screen-left 0 ":sout=#transcode{vcodec=h264}:std{access=file,dst=metaout.mp4"}
FFMpeg live Stream to Facebook Live with Terminal
Here are some snippets to live stream your previous screen recording to Facebook .
Lets change the Input source we would like to stream the desktop instead for that we use the little Free Tool called Camtwist
Avfoundation show us all available input sources
OSX ffmpeg -f avfoundation -list_devices true -i ""
WIN ffmpeg -y -f vfwcap -i list
This example will produce framerate not supported ffmpeg -f avfoundation -i "CamTwist" ffmpegout.mpg
Facebook Life Stream from Camtwist (experimental ) ffmpeg -f avfoundation -r 30 -i "CamTwist" -pix_fmt yuv420p -profile:v baseline -s 320x240 -bufsize 2048k -vb 400k -maxrate 800k -deinterlace -vcodec libx264 -x264opts "keyint=48:min-keyint=48:no-scenecut" -preset ultrafast -r 30 -f flv "rtmp://rtmp-api.facebook.com:80/rtmp/11111111111111111=1&a=2222222222222222" -f avfoundation -r 30 -i “CamTwist” Input source the CamTwist Virtual Camera must fit .
-pix_fmt yuv420p Pixel Format of the input source this will fall back if not suported
-profile:v baseline -s 320×240 -bufsize 2048k -vb 400k -maxrate 800k -deinterlace We chose a Low Profile and smal size for testing 320×240 Set this in ther Camtwist settings
-vcodec libx264 Video Codec
-x264opts “keyint=48:min-keyint=48:no-scenecut” Producer Keyframes every 2 second g- ist not related for RTMP
Looping FFmpeg Stream for Facebook Live
for streams like the endless stream option we would like to use this case ffmpeg -re -stream_loop -1 -i metaout.mp4 -acodec libmp3lame -ar 44100 -b:a 128k -pix_fmt yuv420p -profile:v baseline -s 426x240 -bufsize 6000k -vb 400k -maxrate 1500k -deinterlace -vcodec libx264 -preset veryfast -g 30 -r 30 -f flv "rtmp://rtmp-api.facebook.com:80/rtmp/XXXXXXXX?ds=1&s_l=1&a=XXXXXXXXXXXX"
Optional Loop many Videos Files to Facebook like a Set of Timeline Videos
VLC Mixing Audio and Silent Video
Now we add a Audio source in this case a test.mp3 to our silent metaout.mp4 video , outputing the result to the GUI Player with macosx important is the -noaudio parameter it will abort if not present ,defining Audio codec acodec=mp3 with the audio specs we like.
vlc -vvv -I macosx metaout.mp4 --noaudio --input-slave=test.mp3 --audio-track=1 --sout="#transcode{vcodec=mp4v,vb=800,acodec=mp3,ab=128,channels=2,samplerate=44100}:duplicate{dst=display}"
Same just save the final new mixed File we use h264 codec
vlc -vvv -I macosx test2.mp4 --noaudio --input-slave=test.mp3 --audio-track=1 --sout="#transcode{vcodec=h264,vb=1024,acodec=mp3,ab=128,channels=2,samplerate=44100}:duplicate{dst=std{access=file,mux=mp4,dst="test1outsound.mp4"},dst=display}"
Play a Youtube Video vlc --preferred-resolution 720 https://www.youtube.com/watch?v=m2Oo4kBHBNU
Qualitys preferred-resolution :
-1 : default,best available
1080 :Full HD: 1080p
720 :HD: 720p
576 :SD 576 or 480 lines
360 :Low: 360 lines)
240 :Very Low: 240 lines
VLC Streaming How To Final to Facebook
We Learned how to Capture with VLC , we tested how to Stream with FFmpeg to Facebook . Now lets make the final step the super easy just one tool fast stream my desktop version .
Now Streaming our Desctop like described above this example is full Desctop vlc -I rc screen:// --sout '#transcode{vcodec=h264,vb=300,fps=25,scale=1,acodec=mp4a,ab=64,channels=2}:std{access=rtmp,mux=ffmpeg{mux=flv},dst=rtmp://rtmp-api.facebook.com:80/rtmp/XXXXXXXXXXXXXXX?ds=1&s_l=1&XXXXXXXXXXXXXXXXX}'
Still need Sound added to the VLC Recording here Some Experimental Snippet
vlc -vvv -I rc screen:// --input-slave qtsound://AppleHDAEngineInput:1B,0,1,0:1 --sout '#transcode{vcodec=h264,vb=1024,fps=25,scale=2,acodec=mp4a,ab=44,channels=1}:std{access=rtmp,mux=ffmpeg{mux=flv},dst=rtmp://rtmp-api.facebook.com:80/rtmp/XXXXXXXXXXXXX&s_l=1&a=XXXXXXXXXXXXXX}'
Facebook Stream FAQ
Can we have multiple live streams on one page ? yes, its possible if you don’t terminate them you can even continue with the same key on the stream.
Can we interrupt a Livestream and continue later on ? Yes that’s possible as the last test show in the Video overview the Videos stay Live even if there is no more stream (probably a bug or concept for future functions)
Should we stream over Wifi or Lan ? It’s all time better to stream over Lan as on wifi you will generate more packet errors in your stream
What is the lowest Frame rate we can stream to Facebook ? FB recommend 30 Frames (for US NTSC ) 25 Frames is standard in Europe PAL Norm . For lower Frame Rates we need some more experiments. It reduce your bandwidth usage and left space for quality. Facebook Live Event log will complain if Framerate drops below 16 frames , but still stream
How to find coordinates of screen in Mac OS X and crop position to Capture ?Press CTR SHIFT 4 to pixel exact position and Screen capture size for the VLC crop settings. It’s the same shortcut you use for a single screen capture to disk. The Crosshair shows the pixel position and window size
How long is the delay to the Livestream ?
How long is the live stream Key Valid ? ? ?
Record Periscope Livestream with FFMpeg
ffmpeg -i HLS_URL out.mp4
Control the VLC from the Command Line.
After we executed the command line we can start and stop the recording from the CLI with play and quit . The command stop would not work as expected as the stream can’t be continued . To see the Playlist Elements you can use playlist there shoud be your cli command visible .
playlist : to get the playlist position
start
help
vlc -lUse --list or --list-verbose to list available modules.
vlc -p [module_name] --advanced display help for each module
Mac Terminal Commands
Show which processes are listening to which ports Sockets lsof -i | grep LISTEN
VLC Terminal Errors to clear out
the Lua interface gave us some errors when we start Screen capturing and when we quite the process but it don’t affect our recording , probably the CLI and HTTP interface don’t work together as they should , so we don’t see our CLI executed commands on the web interface . We can live with that for now.
Main Error Es_out_set_ Group Pcr Is Called Too Late
Facebook Event Log Error
Some events logged , so we need to add keyframes and a stable frame rate .
Too low video key frame rate 0.038965
Too low video frame rate 5.844763
VLC CLI Parameter
-I macosx Output Preview in the GUI Player
--http-password <your password here
-vvv "Verbose verbose verbose". Verbose output
VLC CLI Parameter for FFMepg
--input-slave qtsound add sound to the stream
--input-slave timecode:// --timecode-fps 30/1001
vb option to set transcoded video stream, in kbit/s
aboption to set transcoded Audio stream, in kbit/s
scale ratio from which the video should be rescaled while being transcoded ,to reduce stream Bandwith
keyint=<number of frames>
mux encapsulation method used to send the stream
hurry-up allow the encoder to decrease the quality if processor can’t handle
dst location where the video streams should be sent
VBR Mode –x264 Does a better job at keeping the media around the desired bitrate takes longer encoding time x264 –pass 1 –bitrate 1500 -o <output> <input> # ABR Mode x264 –pass 2 –bitrate 1500 -o <output> <input> # VBR Mode This is called 2-pass mode, not VBR mode. ABR is a form of VBR.
VLC Streaming to Chromecast Only for Windows Version VLC 3.0
If your blog get agged probably it get slow . To clean up old SQL entrys there are several plugins but some time like in my case you need to delete millions of outdated Orphaned Post Meta , than plugins will timeout your SQL Database.
Especially if you experiment with post plugins loops can cause very fast tausend of duplicated post and metas.
This is the first try to explore and dig a bit deeper into the Developer World , not only from the code and benefit side but also to learn more about the style and thinking that build the red line thru all his work . Many times phantastic people nearly disappear online and there Blogs get abandoned . Most likely one of the Big 5 IT cooperation already hired him and no time for free plugins or Blogging .
Wp- Sweep is from the Developer Lester Chan a well known high profile WordPress Developer . The Plugin works smooth and clean following WordPress Tables and Terms as long they stay below 100.000 entry then it still works but can take extremely long and outtime your SQL Database on a shared host
The image below show the wp sweep admin screen after cleanup .
Of course before you make any change or clean up in your database dont forget the full backup . For a faster access i use a client like Sequel Pro to manage all the Databases
<code>
DELETE pm
FROM wp_postmeta pm
LEFT JOIN wp_posts wp ON wp.ID = pm.post_id
WHERE wp.ID IS NULL
Package & Compatibility with MAMP 2.1.1 Free version
Just a reference post, Active Configuration are in Bold
Apache HTTP Server 2.2.22
PHP 5.2.17
PHP 5.3.14 (MAMP PRO only) you can change this if you compile your own php
PHP 5.4.4
MySQL 5.5.25
phpMyAdmin 3.5.1
SQLiteManager 1.2.4
Alternative PHP Cache (APC) 3.1.9
curl 7.24.0
eAccelerator 0.9.6.1
Expat XML Parser 2.0.1
FreeType 2.4.8
gettext 0.18.1.1
jpeg 8d
libiconv 1.14
Libidn 1.17
libmcrypt 2.6.8
libpng 1.5.7
libxml2 2.7.8
libxslt 1.1.26
Sablotron XML processor 1.0.3
t1lib 5.1.2
XCache 1.2.2
XCache 1.3.2
Xdebug 2.2.0
PHP/YAZ 1.0.14
YAZ 4.0.1
Upgrading my OSX php to 5.5 not recommended need a upgrade to MAMP3 . Wy we dont upgrade to the new version ? Settings and custom Build for this version was a lot of work and not documented that well like i log now every change on the system that was the main reason i stuck for very long on the running MAMP 2.2 .
Since i just learn to work with brew and debug some build problems this is a little resoruce to help beginner who like compile there builds. This resource was created by experimenting with a custom MLT build. Read also the Formula Cookbook to learn more . Some note
Xcode is required for adding PHP modules
Brew install all kegs in a Cellar /usr/local/Cellar/[FORMULA]/ and simlink them
How to modify brew scripts ?
Once downloaded all brew scripts can be found following dir . The ruby Install scripts can be edited or extended as you like
How to identify 32-bit and 64-bit file types on MacOS X ? With [file]
file /usr/lib/fooooooo.dylib
Mac Terminal Permission
List all USER in Terminal
dscl . -list /Users UniqueID
Repair Home User Permission : Replace username with your username all lower case no space
sudo chown -R username:admin /Users/username
Show Logged in User Name
id -un
List all Groups
dscacheutil -q group
Edit PATH environment vars
Will open the bash_profile with your default editor , in our case with sublime text 2
touch ~/.bash_profile; open ~/.bash_profile
Apache Mac Terminal Commands
start apache Server
sudo apachectl start
Stop Terminate apache
sudo apachectl stop
Restart Apache from Terminal
sudo apachectl restart
Show Apache Version
httpd -v
apache start with terminal output for Error and debugging
apachectl -t
Common Brew install messages
Even after insalling a package dont mean its available for the system if its keg-only its not linked as the system have already a version. If you whant to build with that lib or package you must include the LDFLAGS and CPFLAGS in your make file or you can try to –force linking for your compile .
keg-Only
This formula is keg-only, which means it was not symlinked into /usr/local.
OS X already provides this software and installing another version in
parallel can cause all kinds of trouble.
Generally there are no consequences of this for you. If you build your
own software and it requires this formula, you'll need to add to your
build variables:
LDFLAGS: -L/usr/local/opt/curl/lib
CPPFLAGS: -I/usr/local/opt/curl/include
