multiplexing

remultiplexing a stream with gstreamer stops in PREROLLING

让人想犯罪 __ 提交于 2019-12-13 04:54:17
问题 i'm trying to re-multiplex a quicktime movie (video/jpeg, audio/mpeg) using gstreamer. gst-launch filesrc location="${INFILE}" \ ! qtdemux name=demux \ ! queue \ ! qtmux name=mux \ ! filesink location="${OUTFILE}" \ demux.audio_00 \ ! queue \ ! mux.audio_0 unfortunately this pipeline does not start (it starts PREROLLING and then waits). if i omit the audio stream (or specify a non-existing sink-pad for the audio-stream (e.g. mux.audio.0 ), remultiplexing is done (but without audio) to give a

How to multiplex channel output in go

試著忘記壹切 提交于 2019-12-11 16:44:41
问题 I'm looking for a solution to multiplex some channel output in go. I have a source of data which is a read from an io.Reader that I send to a single channel. On the other side I have a websocket request handler that reads from the channel. Now it happens that two clients create a websocket connection, both reading from the same channel but each of them only getting a part of the messages. Code example (simplified): func (b *Bootloader) ReadLog() (<-chan []byte, error) { if b.logCh != nil {

How do I do multiplexing on OkHttp?

可紊 提交于 2019-12-11 16:01:38
问题 I see some older questions about using SPDY (though the code has changed significantly since then), but no insights into how to properly leverage multiplexing and/or pipelining in OkHttp. I've gone through all the examples and have yet to see anything specifically referring to this. Is this something that is automatically done? 回答1: It’s automatic. If you have a server that supports HTTP/2, and a client that supports HTTP/2, it’ll do the right thing. 来源: https://stackoverflow.com/questions

How to implement video and audio merger program?

蹲街弑〆低调 提交于 2019-12-11 06:55:34
问题 I want to make a program which takes video and audio and merges them. Video type or audio type is not important for me. How can I make this? Does any library exist for this? I know there are many programs about this topic but I want to learn how to implement such a program. 回答1: The technical term for what you are trying to do is ' multiplexing ', and commonly referred to as ' muxing '. FFmpeg is a multiplatform command line tool that does this, and arguable the industry standard. Many

How to re-multiplex Multiple Program Transport Stream (MPTS) files into a single TS?

依然范特西╮ 提交于 2019-12-08 14:24:32
问题 I have multiple MPTS files recorded from satellite receivers, I need to cherry pick programs/services/PIDS from each file re-multiplex them into a single MPTS file. Optionally I might be able to get away with taking all the services from every file and adding them to the final MPTS (In case anyone knows about a multiplexer that wouldn't allow me to cherry pick programs) Does anybody know how to do this with open source or free software (like VLC or ffmpeg for example) under either windows or

Seven Segment Multiplexing on Basys2

无人久伴 提交于 2019-12-06 14:04:38
this is my first post so I hope I'm doing this correctly. I'm trying to output a "4 3 2 1" on a four digit seven segment display on a BASYS2 board. I have checked to make sure that 0 enables the signal and that I have the ports mapped correctly. I believe the error is within my multiplexing logic since I am only able to display a single digit. I'm new to Verilog (am used to C) and would appreciate any suggestions. Thanks `timescale 1ns / 1ps module main (clock, AN0, AN1, AN2, AN3, CA, CB, CC, CD, CE, CF, CG, CDP); //USED FOR SEVEN SEG input clock; output AN0, AN1, AN2, AN3, CA, CB, CC, CD, CE,

fastcgi multiplexing?

半腔热情 提交于 2019-12-06 06:47:20
问题 I'm in process of implementation of a fastcgi application, after reading fastCGI spec I've found a feature called "request multiplexing". It reminded me Adobe RTMP multiplexing back in the days that protocol was proprietary and closed. As far as I understand, multiplexing allows to reduce overhead of creating new connections to FCGI clients effectively interweaving requests chunks, and at the same time enabling "keep-alive" model to connection. Latter allows sending several requests over a

Why is threading works on a single core CPU?

牧云@^-^@ 提交于 2019-12-05 18:47:27
To better understand Threading in Java, I wrote the following code public class SimpleRunnableTest { public static void main(String[] args) throws InterruptedException { long start = System.currentTimeMillis(); Thread t1 = new Thread(new TT1()); t1.start(); Thread t2 = new Thread(new TT2()); t2.start(); t2.join(); t1.join(); long end = System.currentTimeMillis(); System.out.println("end-start="+(end-start)); } } class TT1 implements Runnable { public void run(){ try { Thread.sleep(5000); } catch (InterruptedException e) { e.printStackTrace(); } } } class TT2 implements Runnable { public void

What are the underlying differences among select, epoll, kqueue, and evport?

我是研究僧i 提交于 2019-12-05 01:04:22
问题 I am reading Redis recently. Redis implements a simple event-driven library based on I/O multiplexing. Redis says it would choose the best multiplexing supported by the system, and gives the following code: /* Include the best multiplexing layer supported by this system. * The following should be ordered by performances, descending. */ #ifdef HAVE_EVPORT #include "ae_evport.c" #else #ifdef HAVE_EPOLL #include "ae_epoll.c" #else #ifdef HAVE_KQUEUE #include "ae_kqueue.c" #else #include "ae

What's a file descriptor's “exception”?

冷暖自知 提交于 2019-12-04 16:24:18
问题 When one calls select() asking which file descriptors have "exceptions" waiting, what does that mean? How does one trigger one of these "exceptions"? If anyone can point me to a nice explanation, that'd be awesome. I've been googling and can't find a thing. 回答1: Short form: exceptional situations occur when a TCP socket recieves out of band data. If you read the select manual page, you will find a reference to another supplementary manual page called select_tut with the explanation: exceptfds