[rtmpdump] rtmpdump error: RTMP_ReadPacket, failed to read RTMP packet header

[Howard Chu]

John Smith wrote:
> On Sun, 21 Mar 2010 18:50:57 +0100, John Smith
> <smithjohngroup at gmail.com>  wrote :
>
>> On Sun, 21 Mar 2010 02:09:55 +0100, John Smith
>> <smithjohngroup at gmail.com>  wrote :
>>
>>> Hello,
>>>
>>> I have used rtmpdump with rtmpsrv last week without problem.
>>> This morning, I am unable to use it because I am getting this error:
>>> ERROR: RTMP_ReadPacket, failed to read RTMP packet header
>>>
>>> I can however view the video without problem with my browser.
>>>
>>> Can someone have an hint on the problem ?
>>>
>>> Thanks !
>>>
>>> Here is the verbose output:
>>
>> And here is a more verbose output.
>> It seems that packet received after the checkbw invoke has a size of
>> zero bytes ? And more surprisingly, if I remove the "-W url", it
>> works again ?!? All this seems very strange...
>>
>
> Indeed, instead of giving the flash player, I tried to compute manually
> the swfhash and swfsize and I got exactly the same error message.
> So something is definitely wrong with the SWFVerification process.

Yes, pretty sure I know what the problem is, but I can't access the stream 
from here to test.