So can a WebM video contain FLAC audio?
No, it has been proposed/discussed, but currently webm only support Vorbis for audio.
From the Demuxer and Muxer Guidelines:
Audio codec SHOULD be Vorbis.
[...]
More details can be found here.
Related
I've tried a bunch of things to no avail. Setting the src of an audio element to the following base64 webm dataurl snippet and playing it works in most browsers, but is failing in Safari. Pasting the snippet in the location bar even works in Chrome.
https://gist.github.com/mayorbyrne/99e47f58eefcfe72e84e3e320d136c2c#file-gistfile1-txt
I am able to play a base64 encoded mp3 dataurl, as the following fiddle I found in another response works: https://www.jsfiddle.net/apo299od -- In addition, I've tried replacing the beginning of the snippet data:audio/webm with data:audio/mp3 (works in Chrome, etc), and that moves me further along, but the audio doesn't actually play, it just flashes the audio symbol in the browser for a quick second.
Just wondering if I am spinning my wheels here, or if there is a way to get this snippet playing in an audio element on Safari.
Safari on iOS doesn't support the Vorbis / Opus audio codecs in WebM and on desktop only via third-party extensions like the VLC Web Browser plugin. Safari on iOS 11+ / macOS High Sierra+ can play Opus only if it's in a CAF container.
Note: Safari on iOS supports low-complexity AAC audio, MP3 audio, AIF audio, WAVE audio, and baseline profile MPEG-4 video. Safari on the desktop (Mac OS X and Windows) supports all media supported by the installed version of QuickTime, including any installed third-party codecs
source: https://developer.apple.com/library/archive/documentation/AudioVideo/Conceptual/Using_HTML5_Audio_Video/AudioandVideoTagBasics/AudioandVideoTagBasics.html
Safari can support Ogg Opus files with WebAssembly decoding. You can see the demo and code below. Not as simple as using an <audio> element, but you will get faster, low-latency playback using the Web Audio API:
https://github.com/AnthumChris/fetch-stream-audio
I am starting development on a project containing a web browser video streaming module.
I am seeking advice on whether a Red5 server will be useful or not required as I am new to the video streaming arena -
Users will upload video footage in all formats, .MOV .MPEG4 .AVI .WMV .MPEGPS .FLV .3GPP, and I need to allow other users to stream the videos youtube style (not live).
Thanks
Red5 would be useful for this, but only certain media formats are supported for Video on demand VOD streaming. Any other formats would need to be transcoded into flv or mp4.
IE10 audio element doesn't play my AAC (m4a) files.
Should it? the content type of the files is "audio/aac".
When I check:
audio.canPlayType("audio/mp3") --> TRUE
audio.canPlayType("audio/aac") --> FALSE
audio.canPlayType("audio/m4a") --> FALSE
I thought it should but why it doesn't?
I convert my files to AAC because of IE10 and mobile safari that don't support OGG. Safari Mobile plays this AAC files well.
See the Remarks section in http://msdn.microsoft.com/en-us/library/ie/ff975061%28v=vs.85%29.aspx
Beginning with Internet Explorer 9, any audio or video content needs the correct mime type set on the server, or the files won't play. Internet Explorer 9 and later support MP3 audio, and MP4 audio and video. [...]
Media file to serve Extension setting Mime type setting
...
Audio mp4 m4a audio/mp4
...
So you need to check for audio/mp4 in your code, and also make sure that your server sends this mime-type in the content-type header.
on my web application I use video.js to handle all video MP4 files. I have to specify MP4 file details for my video provider.
I want to handle FF, chrome, IE8/9 and iPad by this format.
Could you define a set of video MP4 file details which ensure that video.js will handle with this format (for example: codec, video/audio format, video format profile)?
I do not know if it will be helpful, but I use mediainfo (http://mediainfo.sourceforge.net/en) to check MP4 file's details.
Including the default code that is provided on the video js website should do enough to support the mp4 file you have (specifically "type='video/mp4'"), however, if you're intending to support Firefox, this won't be enough. FF doesn't support the mp4 file type so you'll need to encode an ogv or a webm. FF provides a plugin that can help here at firefogg.org
Hope this helps.
Using the mciSendString command I am able to play avi, mpeg, mp3, etc. but I am unable to play mp4. Here in this web-site it says I can play any videos provided that I have the correct codecs. I am able to play mp4 using my other media players (eg. vlc player). How can I play mp4 videos or how can I make the MCI device auto detect the necessary driver type and play the videos ?
VLC embeds its MPEG-4 parser and codecs within the applciation and does not share it with the system. You need "true" codecs which register with Windows and extend standard API with support for MPEG-4. If you don't feel like looking for specific codec to install, perhaps the easiest would be to install a codec pack such as K-Lite.