Hi,

We have a distributed system for delivering and displaying video in which the 
encoding is done on one node and the decoding is done on another. The video 
data consists of two separate streams - encoded elementary stream MPEG-2, and 
MJPEG, both of which are on a proprietary transport. We observe the same 
problem on both streams. The system is fielded and has been in operation for 
several years on various 32-bit OS (CentOS and Fedora). We are working on 
introducing a mixed version consisting of 32-bit and 64-bit platforms. Our 
current initial test case consists of a decoding machine running a 32-bit 
version of RHEL 5.3 and an encoding machine running a 64-bit version of RHEL 
5.3.  We've built the FFMPEG libraries that are on the 64-bit machine using the 
same source that was used to build the libraries on the 32-bit machine. We're 
having trouble, apparently, in decoding, as the decoder doesn't return a 
completed frame (the "got picture" flag is always 0 on return from avcode_dec
 ode_video). The MPEG-2 header data appears to be correct. We've spent some 
time debugging this on our side and all looks good there. While we may still 
find this problem is due to something in our applications, we would like to 
rule out a codec issue. We are using FFMPEG 0.4.9. What has been the experience 
with a mix of OS? Can it be done successfully and will it work with our current 
configuration - for example, is a different version of FFMPEG required for 
64/32-bit compatibility?

Thanks -

Michael J. Tiernan
Lockheed Martin Corporation
MIT Lincoln Laboratory
Room S2-553
244 Wood St.
Lexington, MA 02420


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