VLC桌面流媒体

编辑
我停止使用VLC并切换到GMax FLV Encoder。它在IMO方面做得更好。VLC桌面流媒体

原帖
我送我的桌面（屏幕）作为H264视频流到另一台机器，使用follwoing命令行保存到一个文件：

流的发件人：

vlc -I dummy 
    --sout='#transcode{vcodec=h264,vb=512,scale=0.5} 
      :rtp{mux=ts,dst=192.168.0.1,port=4444}'

接收机流的：

vlc -I rc 
    rtp://@:4444 
    --sout='#std{access=file,mux=ps,dst=/home/user/output.mp4}' 
    --ipv4

这工作，但吨这里有几个问题：

该文件不适用于大多数玩家。
VLC能够回放文件，但有一些奇怪：
=>回放实际开始前大约需要10秒。
=>寻找不起作用。

有人能指出我如何解决这些问题的正确方向吗？

编辑：我取得了一些进展。

播放的初始延迟是因为播放器正在等待关键帧。通过迫使流的发送者创建一个新的关键帧每4秒，我可以降低延迟：

:screen-fps=10 
--sout='#transcode{vcodec=h264,venc=x264{keyint=40},vb=512,scale=0.5} 
     :rtp{mux=ts,dst=192.168.0.1,port=4444}'

的寻租问题不解决然而，但我知道它好一点。 RTP流以其原始流格式保存为文件，通常无法将其作为常规视频文件播放。 VLC设法播放这个文件，但大多数其他播放器不会。所以我需要把它转换成一个普通的视频文件。我目前正在调查是否可以用ffmpeg做到这一点，如果我为它提供SDP文件的记录流。

欢迎所有帮助！

来源

2009-11-19 StackedCrooked

我不知道如何回答这个问题，但你尝试使用视频编辑器和文件保存为不同格式？ – Mottie 2009-11-21 12:28:27

是的，用ffmpeg我试图修复，但它似乎将整个输出减少到几帧，所以我结束了1秒的视频。 – StackedCrooked 2009-11-21 14:50:14

这个编程如何相关？ – 2009-11-21 22:37:57

更新您发送命令符合：

venc=x264{scenecut=20,bframes=0}

和你的客户命令行：

vlc -I rc rtp://@:4444 --sout='#std{access=file,mux=mp4,dst=/tmp/output.mp4}' --ipv4

应该可以解决你的问题。你测试了哪些球员？

来源

2009-11-21 22:34:24 Derfel

设置mux = mp4确实有帮助，可惜它没有提到文档（http://www.videolan.org/doc/streaming-howto/en/ch03.html）。今天我发现设置bframes = 0会导致一个可以用ffmpeg修复的文件，但现在由于mux = mp4的设置，这也不再需要了。但是，scenecut = 20如何帮助解决我的问题？或者它只是一个优化？ – StackedCrooked 2009-11-21 23:16:17

还有一个问题：为什么你忽略了x264的keyint = 40设置？ – StackedCrooked 2009-11-21 23:22:44

顺便说一句，我测试了我的Mint vbox上的Movie Player和GNOME Player。这些都可以播放我的录音，这要感谢您提供的设置。 PS：回答上述问题，赏金是你的。 – StackedCrooked 2009-11-21 23:28:41

发件人：

$ vlc screen:// :screen-fps=5 :screen-caching=100 --sout='#transcode{vcodec=h264,venc=x264{scenecut=20,bframes=0},vb=512,scale=0.5}:rtp{mux=ts,dst=127.0.0.1,port=1234}' 
VLC media player 1.1.11 The Luggage (revision exported) 
Blocked: call to unsetenv("DBUS_ACTIVATION_ADDRESS") 
Blocked: call to unsetenv("DBUS_ACTIVATION_BUS_TYPE") 
[0x9caf8fc] main libvlc: Running vlc with the default interface. Use 'cvlc' to use vlc without interface. 
Blocked: call to setlocale(6, "") 
Warning: call to srand(1314435080) 
Warning: call to rand() 
Blocked: call to setlocale(6, "") 

(process:11597): Gtk-WARNING **: Locale not supported by C library. 
    Using the fallback 'C' locale. 
x264 [info]: using cpu capabilities: MMX2 Cache64 
x264 [info]: profile High, level 3.2 
x264 [info]: using SAR=1/1 
x264 [info]: using cpu capabilities: MMX2 Cache64 
x264 [info]: profile High, level 4.0 
x264 [info]: frame I:1  Avg QP:16.44 size: 57235 
x264 [info]: frame P:152 Avg QP:10.01 size: 2747 
x264 [info]: mb I I16..4: 33.8% 2.7% 63.5% 
x264 [info]: mb P I16..4: 0.9% 0.0% 0.9% P16..4: 2.1% 0.4% 0.3% 0.0% 0.0% skip:95.4% 
x264 [info]: 8x8 transform intra:1.8% inter:44.3% 
x264 [info]: coded y,uvDC,uvAC intra: 45.5% 42.9% 40.5% inter: 1.5% 1.5% 1.4% 
x264 [info]: i16 v,h,dc,p: 45% 54% 0% 0% 
x264 [info]: i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 24% 41% 22% 2% 2% 2% 4% 1% 3% 
x264 [info]: i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 16% 49% 13% 2% 3% 3% 5% 2% 7% 
x264 [info]: i8c dc,h,v,p: 43% 49% 7% 2% 
x264 [info]: Weighted P-Frames: Y:0.0% UV:0.0% 
x264 [info]: ref P L0: 85.8% 4.5% 9.1% 0.7% 
x264 [info]: kb/s:124.12 
^C[0x9d4ee6c] signals interface error: Caught Interrupt signal, exiting...

接收机：

$ vlc udp://:1234 
VLC media player 1.1.11 The Luggage (revision exported) 
Blocked: call to unsetenv("DBUS_ACTIVATION_ADDRESS") 
Blocked: call to unsetenv("DBUS_ACTIVATION_BUS_TYPE") 
[0x8c728fc] main libvlc: Running vlc with the default interface. Use 'cvlc' to use vlc without interface. 
Blocked: call to setlocale(6, "") 
Warning: call to srand(1314469032) 
Warning: call to rand() 
Blocked: call to setlocale(6, "") 

(process:11707): Gtk-WARNING **: Locale not supported by C library. 
    Using the fallback 'C' locale. 
libdvbpsi error (PSI decoder): TS discontinuity (received 1, expected 0) for PID 0 
libdvbpsi error (PSI decoder): TS discontinuity (received 1, expected 0) for PID 66 
libdvbpsi error (PSI decoder): TS discontinuity (received 6, expected 5) for PID 0 
libdvbpsi error (PSI decoder): TS discontinuity (received 8, expected 7) for PID 0 
libdvbpsi error (PSI decoder): TS discontinuity (received 10, expected 9) for PID 0 
libdvbpsi error (PSI decoder): TS discontinuity (received 14, expected 13) for PID 0 
libdvbpsi error (PSI decoder): TS discontinuity (received 0, expected 15) for PID 66 
libdvbpsi error (PSI decoder): TS discontinuity (received 2, expected 1) for PID 66 
libdvbpsi error (PSI decoder): TS discontinuity (received 12, expected 11) for PID 66 
libdvbpsi error (PSI decoder): TS discontinuity (received 14, expected 13) for PID 66 
libdvbpsi error (PSI decoder): TS discontinuity (received 0, expected 15) for PID 66 
libdvbpsi error (PSI decoder): TS discontinuity (received 2, expected 1) for PID 66 
libdvbpsi error (PSI decoder): TS discontinuity (received 7, expected 6) for PID 0 
libdvbpsi error (PSI decoder): TS discontinuity (received 9, expected 8) for PID 0 
libdvbpsi error (PSI decoder): TS discontinuity (received 11, expected 10) for PID 0 
libdvbpsi error (PSI decoder): TS discontinuity (received 13, expected 12) for PID 66 
libdvbpsi error (PSI decoder): TS discontinuity (received 15, expected 14) for PID 66 
libdvbpsi error (PSI decoder): TS discontinuity (received 1, expected 0) for PID 0 
libdvbpsi error (PSI decoder): TS discontinuity (received 8, expected 7) for PID 66 
libdvbpsi error (PSI decoder): TS discontinuity (received 11, expected 10) for PID 0 
libdvbpsi error (PSI decoder): TS discontinuity (received 13, expected 12) for PID 66 
libdvbpsi error (PSI decoder): TS discontinuity (received 4, expected 3) for PID 0 
libdvbpsi error (PSI decoder): TS discontinuity (received 8, expected 7) for PID 66 
[0xb740070c] main input error: ES_OUT_SET_(GROUP_)PCR is called too late (pts_delay increased to 300 ms) 
^C[0x8d11cec] signals interface error: Caught Interrupt signal, exiting...

来源

2011-08-27 23:28:24 YumYumYum

VLC桌面流媒体

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