In a few words: how use OPUS audio format in a Webapp (JSX PWA) and make it Safari compatible? Still highly compressed MP3s don't appear to yet be an alternative to OPUS.
Background info: Truly EVERYTHING was looked into - Media recorder API within Vanilla JS, Opus Media recorder. The last was using the React-Mic-basic component.
React-Mic worked on every browser except Safari. Here also tried WAV, Mp3, OGG and all don't work on Safari.
It appears the only solution here is playing around with encoding yet really clueless.
How could this be handled in 2021? A spec issue or perhaps impossible?
Best
Here's a proof-of-concept to get you started. Works in Safari via a WebAssembly Opus decoder. You'll need to dig into the code a little and handle buffer/backpressure control to avoid decoding everything into memory before it's played:
https://fetch-stream-audio.anthum.com/
Related
Is there an ActionScript library for MP3 encoding than Shine-MP3-Encoder? (https://github.com/kikko/Shine-MP3-Encoder-on-AS3-Alchemy)
This library works fine, but I wanted to find a similar solution (on ActionScript, not C) to optimize it for specific needs.
Thanks.
Dont wait for it. A pure AS3 library is impossible as the speed of AS3 is too slow to do MP3 encoding. You will need C++ via AIR Native Extensions (ANE) or Alchemy for this. ANEs work with Adobe AIR so you can publish your content as an app for desktop and mobile. I dont see any issue with it.
See these for ANE-based Mic recording:
ANE-RecordAudio
AirMicrophone
AirMicrophone-ANE
I recorded the mic into a WAV and then use ffmpeg -i d:/path/input.wav d:/path/output.mp3 to convert it instantly into an MP3. I delete the WAV when FFMPEG completes. FFMPEG is a cool little EXE you can just add to your project in any dir. I used Thibault's class to record into WAV.
I am trying to play audio as i used to do but it seems not working now. These are the codes I tried:
local birdSound = audio.loadSound("bird.mp3")
audio.play(birdSound)
It gives an error like that:
WARNING: Failed to create audio sound
Can you help me out? Thanks.
Don't use .mp3. .wav works for both iphone and android.
Make sure the .wav file is in our folder.
Sometimes some sound file can be played on computer, but not works in simulator. In that case, use other files instead.
If you really like that .mp3 file and can not find .wav, find some free software to convert it.
Changing the bit rate(increasing) of my files helped me to solve the problem. Thanks to SatheeshJM!
How can I, on linux, render a swf to a image file?
I need to be able to load other swfs into that swf and run actionscript code.
Is it even possible on linux? I need to do it from PHP, it's fine if I have to use command-line tools.
swfrender from swftools works for basic SWF files.
swfdec-thumbnailer from swfdec-gnome works though it only gets the first frame of the swf.
To get any frame from swf using swfdec see the C code snippet in the following mailing list post.
gnash from gnash also works gnash -s<scale-image-factor> --screenshot last --screenshot-file output.png -1 -r1 input.swf, last image of the swf.
ffmpeg from ffmpeg also works for some swf formats ffmpeg -i movie.swf -f image2 -vcodec png movie%d.png
Also see the following guide for a commandline pipeline.
In order to call external programs from php you use the exec command documented here.
Note that for security reasons it is important to escape arguments passed to exec with another command like escapeshellcmd or escapeshellarg for security reasons.
Once you have converted to an image format whether for single frame or all frame, you can't run action script. Other non GNU / Linux tools support the export of the action script from from SWF.
If the SWF that you are exporting to PNG is too complicated for the other tools than you can use the Flash Plugin or Gnash and Xvfb along with screen capture software to capture either image frames of the SWF or a video format like avi. Then you can extract the images from the video format.
This virtual framebuffer method will support complicated SWF files, though it requires a lot of work as you need to use either Gnash and Xvfb and Screen Capture, or a browser , Xvfb and Selenium, if you want to capture a certain set of mouse / keyboard interactions with the SWF.
Gnash with and without the Virtual FrameBuffer should load the ActionScript before exporting, but may have issues with complicated ActionScript. Flash Plugin with Virtual Framebuffer will load the ActionScript before exporting.
Also see the following StackOverFlow questions, which you question is a duplicate of
Convert SWF to PNG
Render Flash (SWF) frame as image (PDF,PNG,JPG)
SWF to image (jpg, png, …) with PHP
This is the solution I ended up using.
You can use a tool like Xvfb (X11 server) and run the standalone flash player projector inside it (you may need to install a bunch of 32-bit libraries), then use a screen capture utility like import to capture the screen and crop it to size.
I found this page on rendering swf screenshots in linux helpful. It also says that you can use gnash to do this, however gnash won't work for flash player 9+.
Try this air application http://swfrenderer.kurst.co.uk
It render swf frame by frame
I am writting a program as http://www.screencast-o-matic.com/. I used applet and import jmf.jar to my project. When I use it, it couldn't get anything capture devices so it couldn't capture audio and video.
I captured screen to video but it hadn't sound. I captured sound but it hadn't video. I use jmf to merger 2 stream to video file. But it error.
Everybody can help me to resol problem. Thanks your help.
You can use Xuggle-Xuggler http://www.javacodegeeks.com/2011/02/introduction-xuggler-video-manipulation.html API which is wrapper of FFmpeg command line tool. Both are open source.
I am looking for an audio editor that we can use server side (ASP + IIS)
We want users to be able to upload an audio file, and then offer a 10 second teaser clip to other users for download.
Ideally I would like our application to be able to specify Input and Output Filename, Start and End time (or Duration), and be able to fade-in and fade-out, and equalise the volume.
Maybe some audio editors have a batch edit facility, and it would just be a question of installing on the server?
All the keywords I have tried putting into Google have led me on a wild goose chase, hopefully someone can help me with suggestions. Thanks.
Try ffmpeg!
http://ffmpeg.org/
I've used it for all sorts of manipulations of video and audio.