Re: [Vnc2swf-users] How to set FLV meta data (was Re: About FLV output.)

[Olivier H. <oli...@wa...>]

Greetings!

I use flvtool2... with my little patch, when i ask to display metadata i 
have :


$ flvtool2 -P /home/XXXXXXXX/test.flv
---
/home/XXXXXXXX/test.flv:
  framerate: 24
  canSeekToEnd: true
  uselessdatabuff:
  duration: 42


I don't know flvtool++ and i have no time since the end of april to look 
at it....

But can you seek into your produced flv with my patch ?

Oscar Usifer a écrit :
> Folks,
>
> FLV "keyframes" meta data apparently is not being set correctly, even after updating and patching flvtool++-1.1.7. It may be useful to us to ask the author of that tool for a fix. As a result, steaming seeks is not possible. Can others corroborate this finding?
>
> Thanks,
> OSC
>
>  
>
>
>   
>> ----- Original Message -----
>> From: "Olivier Hervieu" <oli...@wa...>
>> To: "Oscar Usifer" <osc...@pr...>
>> Cc: "General discussion about vnc2swf" <vnc...@li...>
>> Subject: Re: How to set FLV meta data (was Re: [Vnc2swf-users] About FLV output.)
>> Date: Fri, 03 Apr 2009 10:19:17 +0200
>>
>>
>> Greetings!
>>
>> Yes, the resulted diff shows a minimal workaround to add some 
>> metadata to the resulting flv (in fact framerate and duration). 
>> These one are needed, otherwise, produced flv files are not 
>> correctly read with flv players (such as FlowPlayer).
>>
>> But it's still 'experimental'. And it will be nice to insert all 
>> metadata like flvtool++ or flvtool2 does. On the other side, 
>> flvtool++ or flvtool2 are post treatment tool. And, more your flv 
>> file is heavy, more your post treatment is long...
>>
>> In an ideal world, there should be inclusion of all the metadata 
>> (such as flvtool + +) at creation time of the flv by vnc2swf .... 
>> Still work to do!
>>
>> If you're interested by this, read the following documentation :
>>
>> http://osflash.org/flv
>> http://pyamf.org/
>>
>> Olivier.
>>
>> Oscar Usifer a écrit :
>>     
>>> Folks,
>>>
>>> I updated __init__.py and commented out import play, and that got 
>>> me further, so I could at least test. The result of this, was 
>>> being able to use the vnc2swf-recorder script to output .flv 
>>> reading from a streaming stdin input. However the resulting 
>>> output files contained blank frames. Seeing that v.0.10.0 swf.py 
>>> had the updates to write out the meta-data for .flv formats, I 
>>> attempted to simply update this file with the diff, but with the 
>>> same bad result as before. Below is an approximate diff. 
>>> "flvtool++" (v.1.1) apparently is a work around for this 
>>> situation. It will create the flv meta data, but does not write 
>>> the correct height meta-data value either because pyvnc2swf 
>>> writes it incorrectly (see swf.py use of 'rect' in FLVWriter), or 
>>> because flvtool++.cpp does uses an incorrect algorithm to read 
>>> it. The diff resolves this.
>>>
>>> Thanks
>>>
>>> [osc@builder-freebsd ~/packages/flvtool++/src/patch]$ diff 
>>> flvtool++.cpp /usr/ports/multimedia/flvtool++/work/flvtool++.cpp 
>>> 190,191c190,191
>>> <                 h  = ((*(vptr++)) & 0x0f) << 8;
>>> <                 h += ((*(vptr++)) & 0xff);
>>> ---
>>>
>>>       
>>>>                 h  = ((*(vptr++)) & 0xff) << 4;
>>>>                 h  = ((*(vptr++)) & 0xf0) >> 4;
>>>>
>>>>         
>>> [osc@rt01 /var/ee/www/swf]$ ~/flvtool++ /tmp/FILM078.flv 
>>> /tmp/FILM078.2.flv Video: 878x629 SCREEN
>>> Total: 313234 video bytes (190.329029 kbps), 0 audio bytes 
>>> (0.000000 kbps), 13.166000 seconds long
>>> Final onMetaData tag contents: {   audiodatarate: 0.000000
>>>   audiosize: 0.000000
>>>   canSeekToEnd: true
>>>   datasize: 316322.000000
>>>   duration: 13.166000
>>>   framerate: 12.076561
>>>   hasAudio: false
>>>   hasCuePoints: false
>>>   hasKeyframes: true
>>>   hasMetadata: true
>>>   hasVideo: true
>>>   height: 629.000000
>>>   keyframes: {   filepositions: {   544.000000
>>> }
>>>   times: {   0.000000
>>> }
>>> }
>>>   lasttimestamp: 13.166000
>>>   metadatacreator: flvtool++ (Facebook, Motion project, dweatherford)
>>>   metadatadate: Thu Apr  2 22:10:27 2009
>>>   totalframes: 159.000000
>>>   videocodecid: 3.000000
>>>   videodatarate: 190.329029
>>>   videosize: 313234.000000
>>>   width: 878.000000
>>> }
>>>
>>>
>>>
>>> [osc@builder-freebsd 
>>> ~/packages/vnc2swf/src/pyvnc2swf-0.9.5/pyvnc2swf]$ diff 
>>> swf-0.10.0.py swf.py 854d853
>>> < 857,871d855
>>> < <     # Meta Data information must be at the start of the file....
>>> <     # Reserve here an area of 100 char to store meta data information
>>> <     # I know this is a bit ugly.. But i have no better idea... 
>>> <     i = 0 <     self.pos = self.outfp.tell()
>>> <     self.writeui8(18)
>>> <     self.writeub24(100) <     self.writeub24(0)
>>> <     self.writeui32(0)
>>> <     self.outfp.flush()
>>> <     while i < 100:
>>> <         self.writeui8(0)
>>> <         i = i+1 <     self.writeub32(111)        885,926d868
>>> <     # To be correctly played into a FLV Player, flv files has 
>>> to handle some meta data
>>> <     # With framerate and duration, many flv player successfully 
>>> read the produced
>>> <     # FLV Stream
>>> <     import struct
>>> < <     # Flushing all the remaining data <     self.outfp.flush()
>>> < <     # Write metadata information
>>> <     self.outfp.seek(self.pos)    < <     # The needed metadata 
>>> are stored in flv with amf format.
>>> <     # For documentation, see : <     #    - http://osflash.org/flv
>>> <     #    - http://pyamf.org/
>>> <     # Following metadata was generated with the help of pyamf
>>> < <     duration = framecount / self.framerate
>>> <     meta  = '\x02\x00\nonMetaData\x08\x00\x00\x00\x00\x00\x08'
>>> <     meta += 'duration\x02' + 
>>> struct.pack('>H',len(str(duration))) + str(duration)
>>> <     meta += '\x00\x0ccanSeekToEnd\x01\x01\x00\t'
>>> <     meta += 'framerate\x02' + 
>>> struct.pack('>H',len(str(self.framerate))) + str(self.framerate) 
>>> + '\x00'
>>> <     # writing metadata duration
>>> <     self.writeui8(18)
>>> <     self.writeub24(100)
>>> <     self.writeub24(0)
>>> <     self.writeui32(0)
>>> <     # Insert pseudo Data to fill the rest of the reserved space
>>> <     rest = 100 -len(meta) -22
>>> <     meta +='\x0fuselessdatabuff\x02' + struct.pack('>H',rest)
>>> <     data = ''
>>> <     while len(data)<rest:
>>> <         # Inserting Blank Data
>>> <         data += '\x00'
>>> <     meta += data
>>> <     meta += '\x00\x00\t'
>>> <     self.write(meta)
>>> <     print len(meta)
>>> <     self.writeub32(111)
>>> < <     self.outfp.seek(0,2) #The end of file
>>> <     self.outfp.flush()
>>>
>>> Command I am using test For v. 0.10.0
>>>   400  zcat FILM075.vnc.gz | vnc2swf-recorder -n -z -o /tmp/FILM078.flv -V
>>>
>>> For v. 0.9.5
>>>   411  zcat FILM078.vnc.gz | /usr/local/pyvnc2swf/bin/vnc2swf.py 
>>> -n -z -o /tmp/FILM078.flv -V
>>>
>>>
>>>
>>>       
>>>> ----- Original Message -----
>>>> From: "Oscar Usifer" <osc...@pr...>
>>>> To: oli...@wa...
>>>> Cc: "General discussion about vnc2swf" <vnc...@li...>
>>>> Subject: Re: [Vnc2swf-users] About FLV output.
>>>> Date: Thu, 2 Apr 2009 13:52:36 -0500
>>>>
>>>>
>>>> It complains pygame is not installed. Is there a version that 
>>>> uses PIL instead, or is there a setup option to set it to use 
>>>> PIL?
>>>>
>>>> Thanks
>>>>
>>>>
>>>>
>>>>
>>>>         
>>>>> ----- Original Message -----
>>>>> From: "Olivier Hervieu" <oli...@wa...>
>>>>> To: "Oscar Usifer" <osc...@pr...>
>>>>> Cc: "General discussion about vnc2swf" 
>>>>> <vnc...@li...>
>>>>> Subject: Re: [Vnc2swf-users] About FLV output.
>>>>> Date: Thu, 02 Apr 2009 10:26:44 +0200
>>>>>
>>>>>
>>>>> The attached tarball has a setup.py that respect standard 
>>>>> python distribution style.
>>>>>
>>>>> Run
>>>>>
>>>>> python setup.py build
>>>>> python setup.py install
>>>>>
>>>>> You can have some help by running
>>>>>
>>>>> 'python setup.py --help' or 'python setup.py --help [command name]'
>>>>>
>>>>> Forget the old makefile. I leave it here for euske.
>>>>>
>>>>> Regards,
>>>>>
>>>>> Olivier.
>>>>>
>>>>> Oscar Usifer a écrit :
>>>>>
>>>>>           
>>>>>> Greets Olivier,
>>>>>>
>>>>>> Just a few requests. I would like to test it out, but am not
>>>>>>             
>>>>> able > to get it into an installed state. I tried to run 
>>>>> setup.py, but > it seems to output usage along the way instead 
>>>>> of actually > performing an install. I was not able to use your 
>>>>> package, as > make fails as well. Could you please update so 
>>>>> that it is > compatible with the current build system? Also, I 
>>>>> have a target > system that I use for installation, so the 
>>>>> setup/make would need > an option to install into a target 
>>>>> directory instead of into a > system. I can take your work and 
>>>>> figure out how to get it > completely installed, but not 
>>>>> everyone has the time or desire to > go to that level of energy 
>>>>> output. Also, I am beginner level with > Python, which makes it 
>>>>> less accessible.
>>>>>
>>>>>           
>>>>>> Thanks,
>>>>>> OSC
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>             
>>>>>>> ----- Original Message -----
>>>>>>> From: "Olivier Hervieu" <oli...@wa...>
>>>>>>> To: vnc...@li..., "Yusuke Shinyama" >>
>>>>>>>               
>>>>> <yu...@cs...>
>>>>>
>>>>>           
>>>>>>> Subject: [Vnc2swf-users] About FLV output.
>>>>>>> Date: Mon, 30 Mar 2009 16:49:48 +0200
>>>>>>>
>>>>>>>
>>>>>>> Hi all,
>>>>>>>
>>>>>>> Vnc2swf can produce FLV. But produced files present some drawbacks.
>>>>>>>
>>>>>>> - files has only one keyframe (also report a few weeks ago),
>>>>>>> - files has no metadata. This means that support of pyvnc2swf 
>>>>>>> FLV files is not complete for most FLV players (impossible to 
>>>>>>> scroll, total record time is not available (a good example : 
>>>>>>> test your pyvnc2swf FlV in FlowPlayer)).
>>>>>>>
>>>>>>> I attach a tarball containing some modifications:
>>>>>>>
>>>>>>> - add a '-k' option to specify the keyframe rate
>>>>>>> - Add meta data on the produced flv.
>>>>>>>
>>>>>>> Note that I also repackage pyvnc2swf to be more pythonic. >>
>>>>>>>               
>>>>> Vnc2swf scripts, edit and play are replaced by scripts >> 
>>>>> vnc2swf-recorder, vnc2swf-editor and vnc2swf player. The >> 
>>>>> distribution is now built and installed with setuptools.
>>>>>
>>>>>           
>>>>>>> The Cli interface was successfully tested on Ubuntu 8.04 and 
>>>>>>> Debian Lenny.
>>>>>>>
>>>>>>> Also note that I did not (and do not want to) install
>>>>>>>               
>>>>> python-tk. >> I paid attention to add some options in the GUI. 
>>>>> But these >> changes are not yet tested,.
>>>>>
>>>>>           
>>>>>>> I leave to Euske or others to test and commit these changes.
>>>>>>>
>>>>>>> Regards,
>>>>>>>
>>>>>>> Olivier Hervieu.
>>>>>>> << pyvnc2swf-0.10.0.tar.gz >>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>               
>>>>>>             
>>>> --
>>>> Be Yourself @ mail.com!
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>>>>
>>>> ------------------------------------------------------------------------------
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>>>>
>>>>         
>>>
>>>
>>>
>>>       
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