[Live-devel] LIVE555TM Media Server takes input from a named pipe

[Alan Martinovic]

Hi,
I'm trying to get a minimal example for using a named pipe as a source of a stream for the LIVE555TM Media Server.
As a proof of concept, I would like to get a working example of making a stream from a sample.264 file into a named pipe and use the named pipe with a .264 extension to have Media Server stream it.

Working example (video plays in vlc)
Files:
rawh264_sample            #The original slamtv60.264 just renamed
periodic_read.py            #A dummy application that creates a binary stream from the rawh264_sample
stream.264                     #The named pipe, created with "mkfifo stream.264"
live555MediaServer       #The server binary from mediaServer

Steps:
./live555MediaServer
Run vlc -> Ctrl+n (Open Network stream) -> rtsp://xx.xx.xx.xx:8554/stream.264
cat rawh264_sample >> stream.264
cat rawh264_sample >> stream.264       #It had to be called twice

---------------------------------------------------------------------------------------------------------------------------------

The idea is to make a simple streamer that just chops the raw video file and periodically sends chops.
The code the dummy streamer (periodic_read.py) is below everything.

Example I didn't get to work (The video starts loading in vlc but breaks)
Files:
rawh264_sample            #The original slamtv60.264 just renamed
periodic_read.py            #A dummy streamer that creates a binary stream from the rawh264_sample
stream.264                     #The named pipe, created with "mkfifo stream.264"
live555MediaServer       #The server binary from mediaServer

Steps:
./periodic_read.py > stream.264         #Move the raw file to the pipe
./live555MediaServer
Run vlc to get the stream


What happens is that the vlc shows that the buffer is loading, but breaks after half. The video never starts to play.
I get an error on the streamer side:
Traceback (most recent call last):
  File "./periodic_read.py", line 14, in <module>
    print chunk
IOError: [Errno 32] Broken pipe


Is it possible that the problem is in the sync between the streamers write speed and mediaServers read speed?
Other comments are welcome :)


------------------------------------------------------------------
# periodic_read.py
#!/usr/bin/python
import time
import sys

file_path = "rawh264_sample"
chunk_size = 1000
frequency = 200
f = open(file_path, "rb")
while True:
    chunk=f.read(chunk_size)
    print chunk
    time.sleep(1/frequency)
if chunk == '' :
    break

------------------------------------------------------------------


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