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Top Forums UNIX for Advanced & Expert Users Ffmpeg (avconv) + crtmpserver Linux streaming video, no player to play it Post 302843812 by +Yan on Thursday 15th of August 2013 07:56:56 AM
Old 08-15-2013
Ffmpeg (avconv) + crtmpserver Linux streaming video, no player to play it

Hello Linux experts,

I'm working on live video streaming project, and my job is to create video streaming server using
Ubuntu 13.04
Here is what I've done so far:
1. Installed crtmpserver from Ubuntu's repositories.
2. Installed ffmpeg

To test the server i use webcam as source of video, and the following command:
avconv -f video4linux2 -i /dev/video0 -f flv -an -metadata streamName="test" tcp://localhost:6666


The command output is:

Code:
avconv version 0.8.6-6:0.8.6-1ubuntu2, Copyright (c) 2000-2013 the Libav developers
  built on Mar 30 2013 22:20:06 with gcc 4.7.2
[video4linux2 @ 0x25b79e0] Estimating duration from bitrate, this may be inaccurate
Input #0, video4linux2, from '/dev/video0':
  Duration: N/A, start: 14840.930660, bitrate: 147456 kb/s
    Stream #0.0: Video: rawvideo, yuyv422, 640x480, 147456 kb/s, 30 tbr, 1000k tbn, 30 tbc
Incompatible pixel format 'yuyv422' for codec 'flv', auto-selecting format 'yuv420p'
[buffer @ 0x25b92e0] w:640 h:480 pixfmt:yuyv422
[avsink @ 0x25a5160] auto-inserting filter 'auto-inserted scaler 0' between the filter 'src' and the filter 'out'
[scale @ 0x25a5840] w:640 h:480 fmt:yuyv422 -> w:640 h:480 fmt:yuv420p flags:0x4
Output #0, flv, to 'tcp://localhost:6666':
  Metadata:
    streamName      : test
    encoder         : Lavf53.21.1
    Stream #0.0: Video: flv, yuv420p, 640x480, q=2-31, 200 kb/s, 1k tbn, 30 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (rawvideo -> flv)
Press ctrl-c to stop encoding


So far so good, BUT when I try to play the stream with mplayer from another console with the command:
mplayer rtmp://localhost/live/test mplayer is stalled for very long time (10-15 min.) before the video starts.

If in the meantime I terminate the avconv command, the video is being shown immediately by mplayer.
I tryied the following mplayer options without success:
-nosound
-nocache
different combinations of -cachie N

I had success with this flash player: Flash RTMP Player - Live Video Streaming
But there is about 3 sec. delay which is too much for me.


Please advice me how can I make mplayer play the video as soon as possible ?

Here is the mplayer output:
Code:
mplayer rtmp://localhost/live/test

MPlayer2 UNKNOWN (C) 2000-2012 MPlayer Team
mplayer: could not connect to socket
mplayer: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.

Playing rtmp://localhost/live/test.
Forced lavf FLV format demuxer
Detected file format: libavformat

Thank you in advance.
 

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tcprobe(1)						      General Commands Manual							tcprobe(1)

NAME
tcprobe - probe multimedia streams from medium and print information on the standard output SYNOPSIS
tcprobe -i name [ -B ] [ -M ] [ -T title ] [ -b bitrate ] [ -H n ] [ -f seekfile ] [ -d verbosity ] [ -v ] COPYRIGHT
tcprobe is Copyright (C) by Thomas Oestreich. DESCRIPTION
tcprobe is part of and usually called by transcode. However, it can also be used independently. tcprobe reads source (from stdin if not explicitely defined) and prints on the standard output. OPTIONS
-i name Specify input source. If ommited, stdin is assumed. You can specify a file, directory, device, mountpoint or host address as input source. tcprobe usually handles the different types correctly. -B Binary output to stdout for use in transcode. -M Use EXPERIMENTAL mplayer probe, useful for streams that tcprobe doesn't recognize elsewhere. With this option enabled, tcprobe merely acts as a frontend for mplayer; of course mplayer binary needs to be installed and avalaible somewhere in PATH. -T title Probe for DVD title -H n This option tells tcprobe to scan n MB of input data. Default is to scan 1 MB. To detect all subtitles and audio tracks (if avail- able) it is highly recommended that this n should be at least increased to 10 or even higher. Very often only some audio tracks start during the first MB of a VOB or DVD file so transcode cannot detect them if not called with a higher value. Please note that transcode(1) has a similar -H option as well which has the same meaning. -s n Skip the first n bytes of the input stream. Default is to skip no bytes. -b bitrate Set audio encoder bitrate to bitrate -f seekfile Read index/seek information from seekfile. This is especially useful for AVI files when it takes a long time to probe when there is no index in the AVI available. Also see aviindex(1). -d level With this option you can specify a bitmask to enable different levels of verbosity (if supported). You can combine several levels by adding the corresponding values: QUIET 0 INFO 1 DEBUG 2 STATS 4 WATCH 8 FLIST 16 VIDCORE 32 SYNC 64 COUNTER 128 PRIVATE 256 -v Print version information and exit. NOTES
tcprobe is a front end for probing various source types and is used in transcode's import modules. EXAMPLES
The command tcprobe -i foo.avi will print interesting information about the AVI file itself and its video and audio content. AUTHORS
tcprobe was written by Thomas Oestreich <ostreich@theorie.physik.uni-goettingen.de> with contributions from many others. See AUTHORS for details. SEE ALSO
aviindex(1), avifix(1), avisync(1), avimerge(1), avisplit(1), tcprobe(1), tcscan(1), tccat(1), tcdemux(1), tcextract(1), tcdecode(1), transcode(1) tcprobe(1) 12th October 2003 tcprobe(1)
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