codec

Is there a way to choose codecs in WebRTC PeerConnection?

由 ﹥＞﹥吖頭↗ 提交于 2019-11-27 07:11:59
问题 Hey I would like to know if there is any way to choose codecs when creating the offer/answer in WebRTC. There are currently not many video codecs to choose from, but there are audio codecs like Opus, PCMU, PCMA etc. 回答1: In general, yes. Here is example of how to prefer Opus codec during establishing conneciton. You should call 'preferOpus' from a callback function for createAnswer or createOffer. var preferOpus = function(sdp) { var sdpLines = sdp.split('\r\n'); for (var i = 0; i < sdpLines

Create video from images

由 梦想与她 提交于 2019-11-27 06:02:13
问题 Is there a way to create a video from a series of images on android? Maybe a way to extend the MediaRecorder and being able to take images as input. I try to really create the video and store it (as an mpeg4 file for instance). Thanks for any suggestions. 回答1: I'm also trying to do the same thing. I have been advice to use Libav. http://libav.org/ However I need to build it with the NDK and I currently have some issues doing it. I'm looking for some doc about it. I'll keep you posted. I've

Adding other video codecs / DVD support to JavaFX 2.2

由 拜拜、爱过 提交于 2019-11-26 22:33:48
Update: Since the media side of JFX has been open sourced, I've looked into this myself and it is indeed possible, but requires changing and rebuilding the JFX source (both Java and C parts.) The process is described here for anyone that wants to have a go - I add MKV support in that example, but it should be very similar for other plugins. The remainder of the question is thus mainly historical, but I'll leave it here for reference. Background I've been using VLCJ thus far for playing video in my application. It works, but if possible I'd like to see if I can achieve a similar level of

How to use pjsip on android device in order to have G.729 codec functionality

由 时光怂恿深爱的人放手 提交于 2019-11-26 21:04:40
问题 I want to use G.729 audio codec on my android application. I have did a lot research on this and came to know that pjsip is most promising solution for this. But I have not much idea about all this. can someone provide me complete steps for using pjsip in existing android application and how can i include support of G729 codec via pjsip . Any help will be appreciated. EDIT : Here is my android.mk file. I want to know that,have i did this right? and how to use those C functions in my java code

Difference between open and codecs.open in Python

由 [亡魂溺海] 提交于 2019-11-26 19:00:59
问题 There are two ways to open a text file in Python: f = open(filename) And import codecs f = codecs.open(filename, encoding="utf-8") When is codecs.open preferable to open ? 回答1: Since Python 2.6, a good practice is to use io.open() , which also takes an encoding argument, like the now obsolete codecs.open() . In Python 3, io.open is an alias for the open() built-in. So io.open() works in Python 2.6 and all later versions, including Python 3.4. See docs: http://docs.python.org/3.4/library/io

What is video timescale, timebase, or timestamp in ffmpeg? [closed]

由 烈酒焚心 提交于 2019-11-26 12:55:27
问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 2 years ago . There does not seem to be any explanation online as to what these are. People talk about them a lot. I just want to know what they are and why they are significant. Using -video_track_timescale, how would I determine a number for it? Is it random? Should it be 0? 回答1: Modern containers govern the

Adding other video codecs / DVD support to JavaFX 2.2

由 有些话、适合烂在心里 提交于 2019-11-26 08:23:53
问题 Update: Since the media side of JFX has been open sourced, I\'ve looked into this myself and it is indeed possible, but requires changing and rebuilding the JFX source (both Java and C parts.) The process is described here for anyone that wants to have a go - I add MKV support in that example, but it should be very similar for other plugins. The remainder of the question is thus mainly historical, but I\'ll leave it here for reference. Background I\'ve been using VLCJ thus far for playing

How to use Blob URL, MediaSource or other methods to play concatenated Blobs of media fragments?

由 无人久伴 提交于 2019-11-26 05:35:24
问题 Am attempting to implement, for lack of a different description, an offline media context. The concept is to create 1 second Blob s of recorded media, with the ability to Play the 1 second Blobs independently at an HTMLMediaElement Play the full media resource from concatenated Blob s The issue is that once the Blob s are concatenated the media resource does not play at HTMLMedia element using either a Blob URL or MediaSource . The created Blob URL only plays 1 second of the concatenated Blob
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