[Home]Export Modules/Export Pvm

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Introduction

This article should be splitted into a modules description and a tutorial.

Also there is still a lot of work to adapt it to this wiki.

The export_pvm module is based on PVM3 library (Parallel Virtual Machine http://www.epm.ornl.gov/pvm/pvm_home.html) and enable the output codec of transcode to process the request in a distributed processing environments constructed on heterogeneous machines and architectures.

The idea is to split the codec work on different machines using a frontend (tcpvmexportd) that load the request module (e.g. export_mpeg2enc.so): each new instances receive from export_pvm a subset of frame and create a portion of the final video file. When all the slave process on host 1,2..n are running (see the schema below) the main task on host 0 (transcode) is waiting for a free task: at the end, when all the video frame are decoded, an others slave processes (merger on host x,y,z) merge all produced file.

For instance only this export modules are supported:

Video:

Audio:

Support for multipass (standard and built in)

Schema

  /---------\                              /--------\
  |transcode|                              |  load  |
  | host 0  |----> from filter output ---->| export |
  |         |                              |  pvm   |
  \---------/                              \--------/
                                                |
                                                | spawn process
                                               \ /
                                                |
                                 _______________|_______________
                                |               |               |
                                |               |               |
 load external module     /------------\  /------------\  /------------\
 /--------------\         |   slave    |  |   slave    |  |   slave    |
 |export_xxx.so |<--------|tcpvmexportd|  |tcpvmexportd|  |tcpvmexportd|
 \--------------/         |  host 1    |  |  host 2    |  |  host n    |
                          \------------/  \------------/  \------------/
                                \_______________|_______________/
                                                |
                                               \ /
                                                |
                                         /--------------\
                                         |  share fs    |
                                         |     nfs      |
 spawned by export_pvm                   |              |
   /------------\                        \--------------/
   |  mergers   |                               |
   |tcpvmexportd|_______________________________/
   |host x,y,z  |
   \------------/
         |
        \ /
         |
  /--------------\
  | output video |
  |     file     |
  \--------------/

Usage Examples

 transcode -y pvm -F list

 [export_pvm.so] v0.0.1 (2003-07-19) (video) * | (audio) *
 [export_pvm.so]  -F configfile,[[nproc]:[maxproc]:[nfrxtask]]
 [export_pvm.so]  nproc,maxproc,nfrxtask override the parameter present in the config file
 [export_pvm.so]  List of known and supported codecs:
 [export_pvm.so]       Supported Modules
 [export_pvm.so]     
[export_pvm.so] null af6 [export_pvm.so] mpeg2enc mp2enc [export_pvm.so] mpeg divx5 [export_pvm.so] divx4 ffmpeg [export_pvm.so] xvid xvid2 [export_pvm.so]

where

configfile
configuration file (see below)
nproc
number of process for a single host
maxproc
max process in the cluster
nfrxtask
number of frame that a single slave task elab. (this is the initial value)

nproc,maxproc,nfrxtask override the parameter present in the config file.

Sample of config file

 [PvmHostCapability]
 NumProcMaxForHost = 1
 MaxProcForCluster = 10
 NumElabFrameForTask = 100
 InternalMultipass=0
 (Host)
 Hostname = marzio
 NumProcMax = 2
 (Host)
 Hostname = elisa
 NumProcMax = 2
 (Host)
 Hostname = cinzia
 NumProcMax = 1
 (Host)
 Hostname = lorenzo
 NumProcMax = 2
 
 [VideoMerger]
 Hostname=cinzia
 BuildOnlyBatchMergeList=1
 
 [AudioMerger]
 Hostname=marzio
 BuildOnlyBatchMergeList=0
 
 [SystemMerger]
 Hostname=marzio
 BuildOnlyBatchMergeList=0
 MultiplexParams="-f 8"
 
 [ExportVideoModule]
 Codec=mpeg2enc
 Param1=d
 Param2=
 Param3=
 
 [ExportAudioModule]
 Codec=mp2enc
 Param1=d
 Param2=
 Param3=
----
where Section ''[PvmHostCapability]'' define the cluster environment
; NumProcMaxForHost : max number of process for each host in cluster (this parameter override NumProcMax in subsection (Host)). default 1

; MaxProcForCluster : max number of process for the cluster: if NumProcMaxForHost * number of host in cluster is > of MaxProcForCluster then MaxProcForCluster is used (this parameter override MaxProcForCluster in subsection (Host)). default 10

; NumElabFrameForTask : number of frame for each running slave task. default 100 

; InternalMultipass : if set to 1 internal multipass is used (multipass in one pass). default 0

; Subsection (Host) Hostname the name of the host to use in cluster (not yet implemented in v 0.0.1). default localhost
  NumProcMax max number of process  (not yet implemented in v 0.0.1). default 1

Section [AudioMerger] define parameter for the audio merger task 

 Hostname the name of the host to use in cluster. default localhost

 BuildOnlyBatchMergeList create only the build list to merge and remove the temporary file and rebuild the final audio file later (using tcpvmexportd -j -m -f file.cfg). If [SystemMerger] exists then this value is set to 1 by the export_pvm module. default 1 (yes)

Section [VideoMerger] define parameter for the video merger task 

 Hostname the name of the host to use in cluster. default localhost

 BuildOnlyBatchMergeList create only the build list to merge and remove the temporary file and rebuild the final video file later (using tcpvmexportd -j -m -f file.cfg). If [SystemMerger] exists then this value is set to 1 by the export_pvm module. default 1 (yes)


Section [SystemMerger] define parameter for the system merger task 

 Hostname the name of the host to use in cluster. default localhost

 BuildOnlyBatchMergeList create only the build list to merge and remove the temporary file and rebuild the final system file later (using tcpvmexportd -j -m -f file.cfg). default 1 (yes)
  Value: 
   0 create directly the system file
   1 create only the merge file list
   2 create the intermediate system files (with a progressive numeber)

 MultiplexParams the parameters to pass to multiplex program (mplex,tcmplex,avimerge): default none. (e.g. for mplex MultiplexParams="-f 8")

Section [ExportVideoModule] define parameter for export codec

 Codec  The name of the codec (e.g. mpeg2enc,null,mpeg)
 
 Param1  1st codec parameter

 Param2  2nd codec parameter

 Param3  3th codec parameter

Section [ExportAudioModule] define parameter for export codec

 Codec  The name of the codec (e.g. mp2enc,null,mpeg)
 
 Param1  1st codec parameter

 Param2  2nd codec parameter

 Param3  3th codec parameter


Warning
 the subsection (Host) isn't yet implemented in v 0.0.1 


If BuildOnlyBatchMergeList parameter is set to 1 then export_pvm create some files list like this:



---------- audio list file ---------------------------------------
[AddAudioList]
Destination = /tmp/Becca-Giasson.mpa
Codec = mp2enc
/tmp/Becca-Giasson-omil002-6648-0.mpa
[RemoveAudioList]
/tmp/Becca-Giasson-omil002-6648-0.mpa
---------- end list file ---------------------------------------

---------- video list file ---------------------------------------
[AddVideoList]
Destination = /tmp/Becca-Giasson.m2v
Codec = mpeg2enc
/tmp/Becca-Giasson-omil002-6645-0.m2v
[RemoveVideoList]
/tmp/Becca-Giasson-omil002-6645-0.m2v
---------- end list file ---------------------------------------

---------- system list file ---------------------------------------
[SystemList]
Destination = /tmp/Becca-Giasson.mpeg
Codec = mpeg2enc-mp2enc
MultiplexParams = "-f 8"
BuildOnlyIntermediateFile=0
[AddAudioList]
Destination = /tmp/Becca-Giasson.mpa
Codec = mp2enc
/tmp/Becca-Giasson-omil002-6648-0.mpa
[RemoveAudioList]
/tmp/Becca-Giasson-omil002-6648-0.mpa
[AddVideoList]
Destination = /tmp/Becca-Giasson.m2v
Codec = mpeg2enc
/tmp/Becca-Giasson-omil002-6645-0.m2v
[RemoveVideoList]
/tmp/Becca-Giasson-omil002-6645-0.m2v
---------- end list file ---------------------------------------




where

Section [AddVideoList] and [AddAudioList] define the merge group list

 Destination The name of destination file

 Codec  The name of the codec 

 file name.....

Section [RemoveVideoList] and [RemoveAudioList] define the remove group list

 file name.....

Section [SystemList] define how to multiplex the produced file list

 Destination The name of destination file

 Codec  The name of the codec (e.g. mpeg2enc-mp2enc,mpeg-mpeg)

 MultiplexParams The parameters to pass to multiplex program (e.g.  MultiplexParams = "-f 8")

 BuildOnlyIntermediateFile Build only intermediate files. default 0

The command

tcpvmexportd -j -m -f merge.lst

make the batch merge .


== <red>R</red>equirements ==
export_pvm require pvm3 (3.4) library to be compiled.

To enable the module run configure with these parameters:
 ./configure --with-pvm3

---------------
* Examples
---------------

This is a quick and dirty how to set up the pvm cluster with two machine (host A and B)

PVM need to exchange information between hosts (using remote shell or ssh)

1) put the entries below in .bashrc for user xyzt (host A and host B)

(for redhat 9)
export PVM_ROOT=/usr/share/pvm3   #PVM root
export PVM_PATH=/home/mmalanc/local/bin  #where you install transcode binary
export PVM_WD=/home/mmalanc/local/bin  #where you install transcode binary
export PVM_RSH=/usr/bin/ssh   #use ssh instead rsh

(for debian)
export PVM_ROOT=/usr/lib/pvm3   #PVM root
export PVM_PATH=/home/mmalanc/local/bin  #where you install transcode binary
export PVM_WD=/home/mmalanc/local/bin  #where you install transcode binary
export PVM_RSH=/usr/bin/ssh   #use ssh instead rsh

2) on each host create a ssh key

 ssh-keygen -t rsa 

3) copy the public key
 
 eval `ssh-agent`
 ssh-add   # your passphrase
 scp -p $HOME/.ssh/id_rsa.pub  hostB:$HOME/.ssh/authorized_keys
 scp -p hostB:$HOME/.ssh/id_rsa.pub  $HOME/.ssh/authorized_keys # now no password is required

4) test if ssh is work (without password)

from hostA ssh hostB (no password is required)
from hostB eval `ssh-agent`
           ssh-add                 # your passphrase
           ssh hostA (no password is required)


5) goto the host that have the input video files (e.g. hostA) and run as root and share volume

 (for redhat 9)
hostA 
 /etc/init.d/nfs start  #start NFS server
 exportfs -i -o rw hostB:/my_multimedia_repository

hostB 
 mkdir /my_multimedia_repository
 mount -t nfs hostB:/my_multimedia_repository /my_multimedia_repository


6) as normal user (xyzt) on hostA run

 pvm
 pvm> add hostA
 add hostA
 1 successful
                     HOST     DTID
                     hostA    80000
 pvm> conf
 conf
 2 hosts, 1 data format
       HOST     DTID     ARCH   SPEED       DSIG
      hostA    40000 LINUXI386    1000 0x00408841
      hostB    80000 LINUXI386    1000 0x00408841
 pvm> quit
 quit

 Console: exit handler called
 pvmd still running.

 Now the cluster has two hosts configured.

7) create the config file

---------- sample of config file (see doc dir) ---------------------------------------
[PvmHostCapability]
NumProcMaxForHost = 1  #best 1 for each cpu
MaxProcForCluster = 10
NumElabFrameForTask = 100

[AudioMerger]
Hostname=hostA
BuildOnlyBatchMergeList=1

[VideoMerger]
Hostname=hostA
BuildOnlyBatchMergeList=1

[SystemMerger]
Hostname=hostA
BuildOnlyBatchMergeList=1
MultiplexParams="-f 8"

[ExportVideoModule]
Codec=mpeg2enc
Param1=d
Param2=
Param3=

[ExportAudioModule]
Codec=mp2enc
Param1=
Param2=
Param3=
---------- end config file ---------------------------------------


8) run transcode

transcode -i /video/BeccaGiasson/Becca-Giasson-001.avi -y pvm -F /tmp/pvm.cfg -o /dati/multimedia/VOB/Becca-Giasson --progress_off

at the end the output will be something like this

-rw-r--r--    1 mmalanc  mmalanc      1247 Aug 13  2003 Becca-Giasson-audio.lst
-rw-rw-r--    1 mmalanc  mmalanc    211614 Aug 13 10:58 Becca-Giasson-hostA-19430-0.m2v
-rw-rw-r--    1 mmalanc  mmalanc    199511 Aug 13 10:58 Becca-Giasson-hostA-19430-1.m2v
-rw-rw-r--    1 mmalanc  mmalanc    230401 Aug 13 10:58 Becca-Giasson-hostA-19430-2.m2v
-rw-rw-r--    1 mmalanc  mmalanc    204532 Aug 13 10:59 Becca-Giasson-hostA-19430-3.m2v
-rw-rw-r--    1 mmalanc  mmalanc    207048 Aug 13  2003 Becca-Giasson-hostA-19430-4.m2v
-rw-rw-r--    1 mmalanc  mmalanc    201741 Aug 13 10:59 Becca-Giasson-hostA-19430-5.m2v
-rw-rw-r--    1 mmalanc  mmalanc    117328 Aug 13 10:59 Becca-Giasson-hostA-19430-6.m2v
-rw-rw-r--    1 mmalanc  mmalanc     13057 Aug 13 10:58 Becca-Giasson-hostA-19434-0.mpa
-rw-rw-r--    1 mmalanc  mmalanc     13057 Aug 13 10:58 Becca-Giasson-hostA-19434-1.mpa
-rw-rw-r--    1 mmalanc  mmalanc     13057 Aug 13 10:58 Becca-Giasson-hostA-19434-2.mpa
-rw-rw-r--    1 mmalanc  mmalanc     13057 Aug 13 10:59 Becca-Giasson-hostA-19434-3.mpa
-rw-rw-r--    1 mmalanc  mmalanc     13057 Aug 13 10:59 Becca-Giasson-hostA-19434-4.mpa
-rw-rw-r--    1 mmalanc  mmalanc      6913 Aug 13  2003 Becca-Giasson-hostA-19434-5.mpa
-rw-rw-r--    1 mmalanc  mmalanc    211897 Aug 13  2003 Becca-Giasson-hostB-29892-0.m2v
-rw-rw-r--    1 mmalanc  mmalanc    203843 Aug 13  2003 Becca-Giasson-hostB-29892-1.m2v
-rw-rw-r--    1 mmalanc  mmalanc    208230 Aug 13  2003 Becca-Giasson-hostB-29892-2.m2v
-rw-rw-r--    1 mmalanc  mmalanc         4 Aug 13  2003 Becca-Giasson-hostB-29892-3.m2v
-rw-rw-r--    1 mmalanc  mmalanc     13057 Aug 13  2003 Becca-Giasson-hostB-29893-0.mpa
-rw-rw-r--    1 mmalanc  mmalanc     13057 Aug 13  2003 Becca-Giasson-hostB-29893-1.mpa
-rw-rw-r--    1 mmalanc  mmalanc     13057 Aug 13  2003 Becca-Giasson-hostB-29893-2.mpa
-rw-rw-r--    1 mmalanc  mmalanc     13057 Aug 13  2003 Becca-Giasson-hostB-29893-3.mpa
-rw-rw-r--    1 mmalanc  mmalanc         0 Aug 13  2003 Becca-Giasson-hostB-29893-4.mpa
-rw-r--r--    1 mmalanc  mmalanc      1249 Aug 13 10:59 Becca-Giasson-video.lst

with these listing files

------------ start Becca-Giasson-video.lst-------------
[AddVideoList]
Destination = /dati/multimedia/VOB/Becca-Giasson.m2v
Codec = mpeg2enc
/dati/multimedia/VOB/Becca-Giasson-hostB-29892-0.m2v
/dati/multimedia/VOB/Becca-Giasson-hostA-19430-0.m2v
/dati/multimedia/VOB/Becca-Giasson-hostA-19430-1.m2v
/dati/multimedia/VOB/Becca-Giasson-hostA-19430-2.m2v
/dati/multimedia/VOB/Becca-Giasson-hostB-29892-1.m2v
/dati/multimedia/VOB/Becca-Giasson-hostA-19430-3.m2v
/dati/multimedia/VOB/Becca-Giasson-hostA-19430-4.m2v
/dati/multimedia/VOB/Becca-Giasson-hostB-29892-2.m2v
/dati/multimedia/VOB/Becca-Giasson-hostA-19430-5.m2v
/dati/multimedia/VOB/Becca-Giasson-hostA-19430-6.m2v
[RemoveVideoList]
/dati/multimedia/VOB/Becca-Giasson-hostA-19430-0.m2v
/dati/multimedia/VOB/Becca-Giasson-hostB-29892-0.m2v
/dati/multimedia/VOB/Becca-Giasson-hostA-19430-1.m2v
/dati/multimedia/VOB/Becca-Giasson-hostA-19430-2.m2v
/dati/multimedia/VOB/Becca-Giasson-hostA-19430-3.m2v
/dati/multimedia/VOB/Becca-Giasson-hostB-29892-1.m2v
/dati/multimedia/VOB/Becca-Giasson-hostA-19430-4.m2v
/dati/multimedia/VOB/Becca-Giasson-hostB-29892-2.m2v
/dati/multimedia/VOB/Becca-Giasson-hostA-19430-5.m2v
/dati/multimedia/VOB/Becca-Giasson-hostA-19430-6.m2v
/dati/multimedia/VOB/Becca-Giasson-hostB-29892-3.m2v
------------ end   Becca-Giasson-video.lst-------------


------------ start Becca-Giasson-audio.lst-------------
[AddAudioList]
Destination = /dati/multimedia/VOB/Becca-Giasson.mpa
Codec = mp2enc
/dati/multimedia/VOB/Becca-Giasson-hostA-19434-0.mpa
/dati/multimedia/VOB/Becca-Giasson-hostA-19434-1.mpa
/dati/multimedia/VOB/Becca-Giasson-hostA-19434-2.mpa
/dati/multimedia/VOB/Becca-Giasson-hostB-29893-0.mpa
/dati/multimedia/VOB/Becca-Giasson-hostB-29893-1.mpa
/dati/multimedia/VOB/Becca-Giasson-hostA-19434-3.mpa
/dati/multimedia/VOB/Becca-Giasson-hostB-29893-2.mpa
/dati/multimedia/VOB/Becca-Giasson-hostA-19434-4.mpa
/dati/multimedia/VOB/Becca-Giasson-hostA-19434-5.mpa
/dati/multimedia/VOB/Becca-Giasson-hostB-29893-3.mpa
[RemoveAudioList]
/dati/multimedia/VOB/Becca-Giasson-hostA-19434-0.mpa
/dati/multimedia/VOB/Becca-Giasson-hostB-29893-0.mpa
/dati/multimedia/VOB/Becca-Giasson-hostA-19434-1.mpa
/dati/multimedia/VOB/Becca-Giasson-hostA-19434-2.mpa
/dati/multimedia/VOB/Becca-Giasson-hostB-29893-1.mpa
/dati/multimedia/VOB/Becca-Giasson-hostA-19434-3.mpa
/dati/multimedia/VOB/Becca-Giasson-hostB-29893-2.mpa
/dati/multimedia/VOB/Becca-Giasson-hostA-19434-4.mpa
/dati/multimedia/VOB/Becca-Giasson-hostB-29893-3.mpa
/dati/multimedia/VOB/Becca-Giasson-hostA-19434-5.mpa
/dati/multimedia/VOB/Becca-Giasson-hostB-29893-4.mpa
------------ end   Becca-Giasson-audio.lst-------------

and

------------ start Becca-Giasson-system.lst-------------
[SystemList]
Destination = /dati/multimedia/VOB/Becca-Giasson.mpeg
Codec = mpeg2enc-mp2enc
MultiplexParams = "-f 8"
BuildOnlyIntermediateFile=0
[AddVideoList]
Destination = /dati/multimedia/VOB/Becca-Giasson.m2v
Codec = mpeg2enc
/dati/multimedia/VOB/Becca-Giasson-hostB-29892-0.m2v
/dati/multimedia/VOB/Becca-Giasson-hostA-19430-0.m2v
/dati/multimedia/VOB/Becca-Giasson-hostA-19430-1.m2v
/dati/multimedia/VOB/Becca-Giasson-hostA-19430-2.m2v
/dati/multimedia/VOB/Becca-Giasson-hostB-29892-1.m2v
/dati/multimedia/VOB/Becca-Giasson-hostA-19430-3.m2v
/dati/multimedia/VOB/Becca-Giasson-hostA-19430-4.m2v
/dati/multimedia/VOB/Becca-Giasson-hostB-29892-2.m2v
/dati/multimedia/VOB/Becca-Giasson-hostA-19430-5.m2v
/dati/multimedia/VOB/Becca-Giasson-hostA-19430-6.m2v
[RemoveVideoList]
/dati/multimedia/VOB/Becca-Giasson-hostA-19430-0.m2v
/dati/multimedia/VOB/Becca-Giasson-hostB-29892-0.m2v
/dati/multimedia/VOB/Becca-Giasson-hostA-19430-1.m2v
/dati/multimedia/VOB/Becca-Giasson-hostA-19430-2.m2v
/dati/multimedia/VOB/Becca-Giasson-hostA-19430-3.m2v
/dati/multimedia/VOB/Becca-Giasson-hostB-29892-1.m2v
/dati/multimedia/VOB/Becca-Giasson-hostA-19430-4.m2v
/dati/multimedia/VOB/Becca-Giasson-hostB-29892-2.m2v
/dati/multimedia/VOB/Becca-Giasson-hostA-19430-5.m2v
/dati/multimedia/VOB/Becca-Giasson-hostA-19430-6.m2v
/dati/multimedia/VOB/Becca-Giasson-hostB-29892-3.m2v
[AddAudioList]
Destination = /dati/multimedia/VOB/Becca-Giasson.mpa
Codec = mp2enc
/dati/multimedia/VOB/Becca-Giasson-hostA-19434-0.mpa
/dati/multimedia/VOB/Becca-Giasson-hostA-19434-1.mpa
/dati/multimedia/VOB/Becca-Giasson-hostA-19434-2.mpa
/dati/multimedia/VOB/Becca-Giasson-hostB-29893-0.mpa
/dati/multimedia/VOB/Becca-Giasson-hostB-29893-1.mpa
/dati/multimedia/VOB/Becca-Giasson-hostA-19434-3.mpa
/dati/multimedia/VOB/Becca-Giasson-hostB-29893-2.mpa
/dati/multimedia/VOB/Becca-Giasson-hostA-19434-4.mpa
/dati/multimedia/VOB/Becca-Giasson-hostA-19434-5.mpa
/dati/multimedia/VOB/Becca-Giasson-hostB-29893-3.mpa
[RemoveAudioList]
/dati/multimedia/VOB/Becca-Giasson-hostA-19434-0.mpa
/dati/multimedia/VOB/Becca-Giasson-hostB-29893-0.mpa
/dati/multimedia/VOB/Becca-Giasson-hostA-19434-1.mpa
/dati/multimedia/VOB/Becca-Giasson-hostA-19434-2.mpa
/dati/multimedia/VOB/Becca-Giasson-hostB-29893-1.mpa
/dati/multimedia/VOB/Becca-Giasson-hostA-19434-3.mpa
/dati/multimedia/VOB/Becca-Giasson-hostB-29893-2.mpa
/dati/multimedia/VOB/Becca-Giasson-hostA-19434-4.mpa
/dati/multimedia/VOB/Becca-Giasson-hostB-29893-3.mpa
/dati/multimedia/VOB/Becca-Giasson-hostA-19434-5.mpa
/dati/multimedia/VOB/Becca-Giasson-hostB-29893-4.mpa
------------ end   Becca-Giasson-system.lst-------------


9) run tcpvmexportd in batch merge mode

 9.1) if you plan to use only audio or video component then you can only run

 tcpvmexportd -m -j -f /dati/multimedia/VOB/Becca-Giasson-audio.lst

[tcpvmexportd] merge into /dati/multimedia/VOB/Becca-Giasson.mpa and remove file /dati/multimedia/VOB/Becca-Giasson-hostA-19434-0.mpa
[tcpvmexportd] merge into /dati/multimedia/VOB/Becca-Giasson.mpa and remove file /dati/multimedia/VOB/Becca-Giasson-hostA-19434-1.mpa
[tcpvmexportd] merge into /dati/multimedia/VOB/Becca-Giasson.mpa and remove file /dati/multimedia/VOB/Becca-Giasson-hostA-19434-2.mpa
[tcpvmexportd] merge into /dati/multimedia/VOB/Becca-Giasson.mpa and remove file /dati/multimedia/VOB/Becca-Giasson-hostB-29893-0.mpa
[tcpvmexportd] merge into /dati/multimedia/VOB/Becca-Giasson.mpa and remove file /dati/multimedia/VOB/Becca-Giasson-hostB-29893-1.mpa
[tcpvmexportd] merge into /dati/multimedia/VOB/Becca-Giasson.mpa and remove file /dati/multimedia/VOB/Becca-Giasson-hostA-19434-3.mpa
[tcpvmexportd] merge into /dati/multimedia/VOB/Becca-Giasson.mpa and remove file /dati/multimedia/VOB/Becca-Giasson-hostB-29893-2.mpa
[tcpvmexportd] merge into /dati/multimedia/VOB/Becca-Giasson.mpa and remove file /dati/multimedia/VOB/Becca-Giasson-hostA-19434-4.mpa
[tcpvmexportd] merge into /dati/multimedia/VOB/Becca-Giasson.mpa and remove file /dati/multimedia/VOB/Becca-Giasson-hostA-19434-5.mpa
[tcpvmexportd] merge into /dati/multimedia/VOB/Becca-Giasson.mpa and remove file /dati/multimedia/VOB/Becca-Giasson-hostB-29893-3.mpa
[tcpvmexportd] remove file /dati/multimedia/VOB/Becca-Giasson-hostA-19434-0.mpa
[tcpvmexportd] remove file /dati/multimedia/VOB/Becca-Giasson-hostB-29893-0.mpa
[tcpvmexportd] remove file /dati/multimedia/VOB/Becca-Giasson-hostA-19434-1.mpa
[tcpvmexportd] remove file /dati/multimedia/VOB/Becca-Giasson-hostA-19434-2.mpa
[tcpvmexportd] remove file /dati/multimedia/VOB/Becca-Giasson-hostB-29893-1.mpa
[tcpvmexportd] remove file /dati/multimedia/VOB/Becca-Giasson-hostA-19434-3.mpa
[tcpvmexportd] remove file /dati/multimedia/VOB/Becca-Giasson-hostB-29893-2.mpa
[tcpvmexportd] remove file /dati/multimedia/VOB/Becca-Giasson-hostA-19434-4.mpa
[tcpvmexportd] remove file /dati/multimedia/VOB/Becca-Giasson-hostB-29893-3.mpa
[tcpvmexportd] remove file /dati/multimedia/VOB/Becca-Giasson-hostA-19434-5.mpa
[tcpvmexportd] remove file /dati/multimedia/VOB/Becca-Giasson-hostB-29893-4.mpa

or

 tcpvmexportd -m -j -f /dati/multimedia/VOB/Becca-Giasson-video.lst

[tcpvmexportd] merge into /dati/multimedia/VOB/Becca-Giasson.m2v and remove file /dati/multimedia/VOB/Becca-Giasson-hostB-29892-0.m2v
[tcpvmexportd] merge into /dati/multimedia/VOB/Becca-Giasson.m2v and remove file /dati/multimedia/VOB/Becca-Giasson-hostA-19430-0.m2v
[tcpvmexportd] merge into /dati/multimedia/VOB/Becca-Giasson.m2v and remove file /dati/multimedia/VOB/Becca-Giasson-hostA-19430-1.m2v
[tcpvmexportd] merge into /dati/multimedia/VOB/Becca-Giasson.m2v and remove file /dati/multimedia/VOB/Becca-Giasson-hostA-19430-2.m2v
[tcpvmexportd] merge into /dati/multimedia/VOB/Becca-Giasson.m2v and remove file /dati/multimedia/VOB/Becca-Giasson-hostB-29892-1.m2v
[tcpvmexportd] merge into /dati/multimedia/VOB/Becca-Giasson.m2v and remove file /dati/multimedia/VOB/Becca-Giasson-hostA-19430-3.m2v
[tcpvmexportd] merge into /dati/multimedia/VOB/Becca-Giasson.m2v and remove file /dati/multimedia/VOB/Becca-Giasson-hostA-19430-4.m2v
[tcpvmexportd] merge into /dati/multimedia/VOB/Becca-Giasson.m2v and remove file /dati/multimedia/VOB/Becca-Giasson-hostB-29892-2.m2v
[tcpvmexportd] merge into /dati/multimedia/VOB/Becca-Giasson.m2v and remove file /dati/multimedia/VOB/Becca-Giasson-hostA-19430-5.m2v
[tcpvmexportd] merge into /dati/multimedia/VOB/Becca-Giasson.m2v and remove file /dati/multimedia/VOB/Becca-Giasson-hostA-19430-6.m2v
[tcpvmexportd] remove file /dati/multimedia/VOB/Becca-Giasson-hostA-19430-0.m2v
[tcpvmexportd] remove file /dati/multimedia/VOB/Becca-Giasson-hostB-29892-0.m2v
[tcpvmexportd] remove file /dati/multimedia/VOB/Becca-Giasson-hostA-19430-1.m2v
[tcpvmexportd] remove file /dati/multimedia/VOB/Becca-Giasson-hostA-19430-2.m2v
[tcpvmexportd] remove file /dati/multimedia/VOB/Becca-Giasson-hostA-19430-3.m2v
[tcpvmexportd] remove file /dati/multimedia/VOB/Becca-Giasson-hostB-29892-1.m2v
[tcpvmexportd] remove file /dati/multimedia/VOB/Becca-Giasson-hostA-19430-4.m2v
[tcpvmexportd] remove file /dati/multimedia/VOB/Becca-Giasson-hostB-29892-2.m2v
[tcpvmexportd] remove file /dati/multimedia/VOB/Becca-Giasson-hostA-19430-5.m2v
[tcpvmexportd] remove file /dati/multimedia/VOB/Becca-Giasson-hostA-19430-6.m2v
[tcpvmexportd] remove file /dati/multimedia/VOB/Becca-Giasson-hostB-29892-3.m2v


and the output will be 

-rw-r--r--    1 mmalanc  mmalanc   1996145 Aug 13 11:08 Becca-Giasson.m2v
-rw-r--r--    1 mmalanc  mmalanc    124426 Aug 13 11:07 Becca-Giasson.mpa


 9.2) If you plan to join audio and video then run the command

 tcpvmexportd -m -j -f /dati/multimedia/VOB/Becca-Giasson-system.lst

(if you multiplex the two file produced with 9.1 (Becca-Giasson.m2v Becca-Giasson.mpa) you'll have a mpeg system file with A/V out of sync)

(with BuildOnlyBatchMergeList=0 in the pvm.cfg file the step 8 produce the final file directly)

== Performance ==
Number of frame: 5632

Switched LAN 100 Mb/s

* Version of transcode (normal encode):
 transcode v0.6.10 (C) 2001-2003 Thomas Oestreich
 [transcode] auto-probing source SanMartinodiCastrozza-04-07-2000.smil (ok)
 [transcode] V: import format    | Digital Video QuickTime (V=mov|A=mov)
 [transcode] V: import frame     | 720x576  1.25:1
 [transcode] V: de-interlace     | (mode=5) interpolate scanlines / blend frames
 [transcode] V: bits/pixel       | 0.174
 [transcode] V: decoding fps,frc | 25.000,3
 [transcode] A: import format    | 0x1     PCM          [32000,16,2]
 [transcode] A: export format    | 0x50    MPEG layer-2 [32000,16,2]  128 kbps
 [transcode] V: encoding fps,frc | 25.000,3
 [transcode] A: bytes per frame  | 5120 (5120.000000)
 [transcode] A: adjustment       | 0@1000
 [transcode] V: IA32 accel mode  | sse (sse mmxext mmx asm)
 [transcode] V: video buffer     | 10 @ 720x576
 [import_xml.so] v0.0.8 (2003-07-09) (video) * | (audio) *
 [export_mp2enc.so] v1.0.8 (2003-04-10) (audio) MPEG 1/2
 [export_mpeg2enc.so] v1.1.8 (2003-07-24) (video) MPEG 1/2

* Version of transcode (pvm encode):
 transcode v0.6.10 (C) 2001-2003 Thomas Oestreich
 [transcode] auto-probing source SanMartinodiCastrozza-04-07-2000.smil (ok)
 [transcode] V: import format    | Digital Video QuickTime (V=mov|A=mov)
 [transcode] V: import frame     | 720x576  1.25:1
 [transcode] V: de-interlace     | (mode=5) interpolate scanlines / blend frames
 [transcode] V: bits/pixel       | 0.174
 [transcode] V: decoding fps,frc | 25.000,3
 [transcode] A: import format    | 0x1     PCM          [32000,16,2]
 [transcode] A: export format    | 0x55    MPEG layer-3 [32000,16,2]  128 kbps
 [transcode] V: encoding fps,frc | 25.000,3
 [transcode] A: bytes per frame  | 5120 (5120.000000)
 [transcode] A: adjustment       | 0@1000
 [transcode] V: IA32 accel mode  | sse (sse mmxext mmx asm)
 [transcode] V: video buffer     | 10 @ 720x576
 [import_xml.so] v0.0.8 (2003-07-09) (video) * | (audio) *
 [export_pvm.so] v0.0.1 (2003-08-12) (video) * | (audio) *
 (export_pvm_slave.c) on host hostA pid 23866 recall [export_mpeg2enc.so] v1.1.8 (2003-07-24) (video) MPEG 1/2
 (export_pvm_slave.c) on host hostB pid 11036 recall [export_mpeg2enc.so] v1.1.8 (2003-07-24) (video) MPEG 1/2
 (export_pvm_slave.c) on host hostA pid 23868 recall [export_mp2enc.so] v1.0.8 (2003-04-10) (audio) MPEG 1/2
 (export_pvm_slave.c) on host hostB pid 11037 recall [export_mp2enc.so] v1.0.8 (2003-04-10) (audio) MPEG 1/2


Scenario pvm 1
 host A: pentium 3 866 MHz, 1GB RAM (decode+nfs server+merger+slave process)
 host B: pentium 3  1GHz, 256MB RAM (slave process)

 Cmd1: transcode -i SanMartinodiCastrozza-04-07-2000.smil -y pvm -F /dati/multimedia/VOB/pvm.cfg -o /dati/multimedia/VOB/SanMartinodiCastrozza-04-07-2000-pvm -I 5 
 Cmd2: transcode -i SanMartinodiCastrozza-04-07-2000.smil -y pvm -F /dati/multimedia/VOB/pvm2.cfg -o /dati/multimedia/VOB/SanMartinodiCastrozza-04-07-2000-pvm -I 5 -w 7500
 Config file:
-----------------------pvm.cfg----------------------------------
[PvmHostCapability]
NumProcMaxForHost = 1
MaxProcForCluster = 10
NumElabFrameForTask = 100
(Host)
Hostname = hostA
NumProcMax = 2
(Host)
Hostname = hostB
NumProcMax = 2

[VideoMerger]
Hostname=hostA
BuildOnlyBatchMergeList=0

[AudioMerger]
Hostname=hostA
BuildOnlyBatchMergeList=0

[SystemMerger]
Hostname=hostA
BuildOnlyBatchMergeList=0
MultiplexParams="-f 8"

[ExportVideoModule]
Codec=mpeg2enc
Param1=8
Param2=
Param3=

[ExportAudioModule]
Codec=mp2enc
Param1=
Param2=
Param3=
-----------------------pvm.cfg----------------------------------

Scenario pvm 2
 host A: pentium 3 866 MHz, 1GB RAM (decode+nfs server+merger+slave process)
 host B: pentium 3  1 GHz, 256MB RAM (slave process)
 host C: pentium 3  497 MHz, 256MB RAM (slave process) 

 Cmd1: transcode -i SanMartinodiCastrozza-04-07-2000.smil -y pvm -F /dati/multimedia/VOB/pvm.cfg -o /dati/multimedia/VOB/SanMartinodiCastrozza-04-07-2000-pvm -I 5 
 Cmd2: transcode -i SanMartinodiCastrozza-04-07-2000.smil -y pvm -F /dati/multimedia/VOB/pvm2.cfg -o /dati/multimedia/VOB/SanMartinodiCastrozza-04-07-2000-pvm -I 5 -w 7500
 Config file:
-----------------------pvm1.cfg----------------------------------
[PvmHostCapability]
NumProcMaxForHost = 1
MaxProcForCluster = 10
NumElabFrameForTask = 100
(Host)
Hostname = hostA
NumProcMax = 2
(Host)
Hostname = hostB
NumProcMax = 2

[VideoMerger]
Hostname=hostA
BuildOnlyBatchMergeList=0

[AudioMerger]
Hostname=hostA
BuildOnlyBatchMergeList=0

[SystemMerger]
Hostname=hostA
BuildOnlyBatchMergeList=0
MultiplexParams="-f 8"

[ExportVideoModule]
Codec=mpeg2enc
Param1=6
Param2="-f 3 -F 3 -n p -q 2 -r 32 -4 1 -2 1"
Param3=

[ExportAudioModule]
Codec=mp2enc
Param1=
Param2=
Param3=
-----------------------pvm1.cfg----------------------------------


Scenario normal encode
 host A: pentium 3 866 MHz, 1GB RAM (mpeg2enc,mp2enc)

 Cmd1: transcode -i SanMartinodiCastrozza-04-07-2000.smil -y mpeg2enc,mp2enc -F 8 -o /dati/multimedia/VOB/SanMartinodiCastrozza-04-07-2000-mpeg2enc-mp2enc -I 5 
 Cmd2: transcode -i SanMartinodiCastrozza-04-07-2000.smil -y mpeg2enc,mp2enc -F 6,"-f 3 -F 3 -n p -q 2 -r 32 -4 1 -2 1" -o /dati/multimedia/VOB/SanMartinodiCastrozza-04-07-2000-mpeg2enc-mp2enc -I 5 -w 7500


Results:
Cmd1
 Normal encode  : elapsed time 1646 sec (27min 26sec -> 3.4212 fps)
 Pvm encode 2 hosts : elapsed time 1410 sec (23min 30sec -> 3.9943 fps)
 Pvm encode 3 hosts : elapsed time 1204 sec (20min 04sec -> 4.6777 fps)
Cmd2
 Normal encode  : elapsed time 7951 sec (2hour 12min 31sec -> 0.7083 fps)
 Pvm encode 2 hosts : elapsed time 4856 sec (1hour 20min 56sec -> 1.1598 fps)
 Pvm encode 3 hosts : elapsed time 4173 sec (1hour  9min 33sec -> 1.3496 fps)


== Tips ==
# If you have a single machine with a single CPU don't use the export_pvm (it produce the same file in about 1.2-1.3 time then normal export module)
# If you have machine with a single CPU set NumProcMaxForHost to 1 max 2 and set MaxProcForCluster to number of host * NumProcMaxForHost + 1 
# Set 1-2 process for each CPU
# If the decode process never wait for a free task then you probably found the right configuration (add more slave host is useless: you need to speed up the decode process).
# If you plan to have a system file don't multiplex the merged audio and video, but run the built in system merge process (this remove an A/V sync problem).
# If you plan to create a DVD with dvdauthor then set BuildOnlyBatchMergeList=2 in the [SystemMerger] section and pass to dvdauthor the system files generated (force BuildOnlyIntermediateFile=1 in the [SystemList] section). (with dvdauthor alpha 338 use this command dvdauthor -o mydir -c 0:00,x:yz mympeg.mpeg-000000 -c c 0:00,x:yz mympeg.mpeg-000001 ........ where x:yz is the value set in NumElabFrameForTask (e.g. NumElabFrameForTask=99 and PAL x:yz=3:24))
# If you enable the multipass option (-R 1,2) the video and audio log will be created in the output directory (option -o and -m).
# If you plan to create an avi with multipass, you can use the internal multipass (it takes less time then standard multipass option (set InternalMultipass=1))
# If you specify InternalMultipass=1 in cfg file and -R (1,2,3) in cmd line, -R option will be used.

== <red>C</red>hange log ==
<pre>
2003-09-22 * acinclude.m4 aclocal.m4 docs/export_pvm.txt docs/man/tcpvmexportd.1 export/export_ffmpeg.c export/export_pvm.c export/Makefile.am pvm3/export_pvm_slave.c pvm3/export_pvm_slave.h pvm3/external_codec.c pvm3/external_codec.h pvm3/Makefile.am pvm3/pvm_functions.c pvm3/pvm_functions.h pvm3/pvm_parser.c pvm3/pvm_parser.h pvm3/pvm_version.h pvm3/tcpvmexportd.c pvm3/vob_pack_unpack.c pvm3/vob_pack_unpack.h src/Makefile.am src/tc_func_excl.h src/tc_functions.c src/tc_functions.h src/transcode.c src/transcode.h

- added support for ffmpeg,divx4,divx5,af6,xvid,xvid2 encode module.
- added multipass and internal multipass support.
- enable pvm3 by default.
- bugfix.

2003-08-21 * docs/export_pvm.txt export/export_pvm.c pvm3/external_codec.c pvm3/tcpvmexportd.c

- added support for mpeg encode.

2003-08-20 * docs/export_pvm.txt docs/man/tcpvmexportd.1 docs/pvm.cfg export/export_pvm.c pvm3/export_pvm_slave.c pvm3/export_pvm_slave.h pvm3/pvm_parser.c pvm3/pvm_parser.h pvm3/pvm_version.h pvm3/tcpvmexportd.c

- added BuildOnlyBatchMergeList=2 in [SystemMerger] section to build only the intermediate system files and BuildOnlyIntermediateFile in [SystemList] section (dvdauthor don't like a merged file).

2003-08-12 * first release of export_pvm

To do


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