Seeking while casting video from ubuntu using rcast.py results in broken pipe

[jishnub]

I am casting a video from my laptop running Ubuntu using rcast.py and it works as expected. From the remote control panel I can use the play/pause, stop, volume buttons correctly. However seeking (either +-30s or +-10 mins) fails with a broken pipe. I am attaching the traceback

Exception happened during processing of request from ('192.168.1.10', 32828)
Traceback (most recent call last):
  File "/home/jishnu/anaconda3/lib/python3.6/socketserver.py", line 317, in _handle_request_noblock
    self.process_request(request, client_address)
  File "/home/jishnu/anaconda3/lib/python3.6/socketserver.py", line 348, in process_request
    self.finish_request(request, client_address)
  File "/home/jishnu/anaconda3/lib/python3.6/socketserver.py", line 361, in finish_request
    self.RequestHandlerClass(request, client_address, self)
  File "/home/jishnu/anaconda3/lib/python3.6/socketserver.py", line 696, in __init__
    self.handle()
  File "/home/jishnu/anaconda3/lib/python3.6/http/server.py", line 418, in handle
    self.handle_one_request()
  File "/home/jishnu/anaconda3/lib/python3.6/http/server.py", line 406, in handle_one_request
    method()
  File "/home/jishnu/anaconda3/lib/python3.6/http/server.py", line 639, in do_GET
    self.copyfile(f, self.wfile)
  File "/home/jishnu/anaconda3/lib/python3.6/http/server.py", line 800, in copyfile
    shutil.copyfileobj(source, outputfile)
  File "/home/jishnu/anaconda3/lib/python3.6/shutil.py", line 82, in copyfileobj
    fdst.write(buf)
  File "/home/jishnu/anaconda3/lib/python3.6/socketserver.py", line 775, in write
    self._sock.sendall(b)
BrokenPipeError: [Errno 32] Broken pipe
----------------------------------------

Seeking fails using both the android app and the remote website http://raspberrypi.local:2020/remote.

[mheine]

I am unable to reproduce this specific error (I'm also getting a Errno 32, but it's appearing when trying to cast specific video files), but I my guess would be that it has something to do with how we send input to Omxplayer:
os.system("echo -n $'\x1b\x5b\x43' > /tmp/cmd &") [server.py:182]

However, since seeking works for non-local files, another possibility is that serving video content over HTTP, and then trying to seek in it is just not was HTTP was meant for (see this StackOverflow answer).