Update README.md - Deprecation

Author: njoyard

README.md

@@ -3,8 +3,11 @@
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-> **Fluent-ffmpeg is looking for new maintainers**
-> More details [on the wiki](https://github.com/fluent-ffmpeg/node-fluent-ffmpeg/wiki/Looking-for-a-new-maintainer)
+## Fluent-ffmpeg is now deprecated
+
+This library is **no longer maintained** and no longer works properly with recent ffmpeg versions. Use it as your own risk, this repository is readonly and does not accept issues or PRs.
+
+## About
 
 This library abstracts the complex command-line usage of ffmpeg into a fluent, easy to use node.js module. In order to be able to use this module, make sure you have [ffmpeg](http://www.ffmpeg.org) installed on your system (including all necessary encoding libraries like libmp3lame or libx264).
 
@@ -1486,4 +1489,4 @@ The above copyright notice and this permission notice shall be included in all c
 THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 
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