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• FFMPEG G711ulaw Rhythmic Distortion [closed]

  8 juillet 2024, par nsd123

  I am using ffmpeg take audio in from my microphone, rtp stream it to a multicast address as g711ulaw audio, and then play that audio through various devices.

  


  In my network I have other workstations, as well as a digital telephone type device.
My workstations are using Windows.

  


  I am taking the microphone input with this ffmpeg command :
ffmpeg -f dshow -i audio="" -pcm_mulaw -ab 64k -ac 1 -ar 8000 -f rtp rtp :// : ?localaddr=

  


  This command transmits the microphone data successfully to other workstations on the network, where I can use ffplay or other means to listen to the rtp stream and hear clear audio.

  


  On the telephone device, when it gets converted to analog to play, it's picking up this strange, rhythmic burp/clicking/noise, like every time its getting information, its interpreting the header as voice data or something.

  


  The output of the ffmpeg command says the pcm_s16le codec is the native one, and seems to convert it just fine.

  


  Is there any kind of option I should be using in my ffmpeg command that sounds like it could resolve this issue ? Or does this kind of interference typically occur for a specific reason ?

  


  Its not the hardware, I've tested that (other audio able to play clearly).
I've tried a few other codecs to no success.
I've tried a few ffmpeg options, but there are so many options, they've just been successful stabs in the dark

  


• License or not ? As website owner do i have to pay license for using ffmpeg (x264) -> mp4 decoding in my webiste ?

  28 août 2014, par linderman

  I am very confused about my legal or illegal rights to use H.264 mp4 file.

  I had long time reading various websites about should i pay license or not ... still cant understand ..

  So here is the exact situation :

  I have website , where users can upload their videos. Videos are taken with their smart-phones or home cameras , or webcam etc.

  After they upload their videos , i am using FFMPEG (x264) to convert the video from 3gp, mov, or even "mp4 to mp4".

  Then other users can watch these decoded videos on my website.

  I am not charging the end users anything. My website is free for uploaders and viewers.

  You will be right if you say that my website have the same purpose as youtube - and you will be right.. video sharing !

  So ME - as website owner , hosting buyer and ffmpeg user ... should i have to pay license ? OR ABANDON THE MP4 decoding in my website ?

  Thank you

• Recapping WebM’s First Week

  25 mai 2010, par noreply@blogger.com (John Luther) — webm, vp8, vorbis

  The WebM project launched last Wednesday with broad industry backing (watch video of the announcement). The list of supporters keeps growing with new additions such as the popular VLC media player, Miro Video Converter, HeyWatch cloud encoding platform, and videantis programmable processor platform. We’re also happy to see that future versions of IE will support playback of VP8 when the user has installed the codec.

  Our announcement sparked discussions in the community around the design and quality of our developer release. We’ve done extensive testing of VP8 and know that the codec can match or exceed the quality of other leading codecs. Starting this week, the engineers behind WebM will post frequently to this blog with details on how to make optimal use of its VP8 video codec and Vorbis audio codec. We are confident that the open development model will bring additional improvements that will further optimize WebM. In fact, the power of open development is already visible, with developers submitting patches and the folks at Flumotion enabling live streaming support in their product just three days after the project was launched.

  Keep an eye on this blog for regular updates on the adoption and development of WebM. To participate in the conversation or to ask questions of the WebM team, please join our discussion group.

  John Luther
  Product Manager, Google