Media Capture is a lite weight Opera and Firefox extension designed to capture media files from streaming HTML5 video.
Extract audio and video files from streaming HTML5 video.
You can combine (mux) audio and video streams together with third-party plugins.
You can change audio volume up/down with the FFmpeg tool.
Has the feature to convert audio or video files to .mp3 file format.
Frequently Asked Questions
What is media capture?
Media capture is a browser add-on that can capture audio and video files from a streaming HTML5 video. Simply click on the download button to see the media list. Within the UI (in-page popup) you can see the captured video and audio files. Please note that some items have both video and audio files and some others include only audio or a video file. Once you download an item to your machine, you can convert it to MP3 as well. Simply click on the - Convert to MP3 - button at the top right corner in the UI. A web-app will be open in a new tab; simply drag and drop the media file in the app and click on the convert button. There is also a - Clear Cache - button in the UI. Press this button in case you see any errors when trying to download a media file or if you can not see the download size for each item.
How can I convert a video or audio file to MP3?
As mentioned above, there is a button in the app UI (top section), which directs you to a web application. This web app can convert any local media file (video or audio) to .mp3 file format. Please note that you need to first download the media file and then drag and drop the file in the web app to convert. If you prefer a third party plugin instead of a web app to convert media file to MP3, you can use Media Converter and Muxer extension. Alternatively, you can use FFmpeg command-line tools to convert your media files. Please read below to get more info about each conversion tool.
How can I convert a video to audio file?
For your media conversion needs, it is recommend to use Media Converter and Muxer extension. Alternatively, you can download FFmpeg Audio Extractor, then run the following command: ffmpeg -i %input -q:a 0 %output.mp3 where "%input" is the input video file and "%output.mp3" is the converted file.
How to extract audio stream from a video file?
If you have Media Converter and Muxer installed, please head to tab #2 and drag the file there. Alternatively, download FFmpeg Audio Extractor according to the above FAQ, then run the following command: ffmpeg -i %input -acodec copy -vn %output where "%input" is the input video file and "%output" is the converted audio file.
How can I combine (mux) audio and video streams together?
Open Media Converter and Muxer, go to tab #3 and drag both video and audio files in the window. Alternatively, download FFmpeg Audio Extractor according to the above FAQ, then run the following command: ffmpeg -i %audio -i %video -acodec copy -vcodec copy %output where "%audio" is the audio stream, %video is the video stream, and "%output" is the output video file.
How can I change the audio volume up and down with FFmpeg command-line tool?
To turn the audio volume up or down, you may use FFmpeg's Audio Filter named volume, like in the following example. If you want the volume to be half of the input volume, run the following command: ffmpeg -i %input -af 'volume=0.5' %output
What are the recommended online services to convert media files?
As mentioned above, the simplest option is the Convert to MP3 button in the app UI (top section). It opens a web app that enables you to convert any media file to .mp3 file format. If you prefer other applications, please type - convert to mp3[or other formats] - keyword in Google or other search engines to see the list of available online conversion tools.
What are the recommended media players for playing audio or video files?
We recommend these media players: VideoLAN (VLC) and Media Player Classic.
Why does MP3 conversion have a variable bitrate by default?
Variable bitrate (VBR) is a term used in telecommunications and computing that relates to the bitrate (amount of data) used in sound or video encoding. Usually, the higher the bitrate, the higher the audio or video quality is. As opposed to constant bitrate (CBR), VBR files dynamically vary the amount of data so higher bitrates are used for segments with rapidly changing video/audio, and lower bitrates are used for slower-changing parts. The average of these rates can be calculated to produce an average bitrate for the file. You can change this behavior using FFmpeg's settings. For a list of available options, see: Encoding VBR (Variable Bit Rate) mp3 audio.
What can I do if I see errors when trying to download a media file?
As mentioned above, there is a - Clear Cache - button available in the app UI. Please press on this button and see if the issue is resolved. If not, please use the email below and write to us with the problem explained in detail. We will try to fix the issue as soon as possible. Please note that sometimes reloading a tab or restarting the browser may resolve the problem. Moreover, installing and uninstalling the extension may also work if none of the above solutions worked.
Does this app work in a mobile browser?
Yes, this app works for both mobile and desktop machines. Currently, only Firefox mobile browser supports installing addons. Please note that the download button position may vary when opening a website in mobile or desktop.
How can I uninstall the Media Capture extension from my Firefox?
To uninstall the extension go to Firefox > Add-ons > Media Capture, then press Uninstall button.
How can I uninstall Media Capture extension from my Opera?
To uninstall the extension go to Opera > Extensions tab, then find Media Capture and press on the "Remove form Opera" button.