Why mp4 or mp4.ts from identical installation?

[artisticforge .]

hello

the two Linux installed have different Perl modules installed.

You would have to find out the versions of the Perl modules used by get_iplayer.

get_iplayer is fine. the perl installation is the issue.


On Fri, Feb 10, 2017 at 11:03 AM, Charles Bradshaw
<charles.bradshaw at ntlworld.com> wrote:
> Hi RS,
>
> I did, sort of, say which version of get_iplayer I'm using. If you
> looked at dumps.txt.zip in my original post the last lines both say:
> "get_iplayer Web PVR Manager v2.97, ©2009-2010 Phil Lewis - Licensed
> under GPLv3".
>
> I have been completely deceived by the fact that both installs are the
> same, but the results are radically different! Further posts telling me
> that ffmpeg versions might be the cause are, as it turns out, a complete
> red herring.
>
> I think you might eventualy understand the problem if I tell you that
> with get_iplayer v2.98 the problem goes away completely. Then both
> installs, but still using original package manager installed with
> different versions of ffmpeg, produce identical .mpg files. Albeit ~1.4
> times the size than when the intermediate is flash.
>
> I'm very happy that the problem has gone away, but suggest that
> somebody, hopefully with a better understanding of the internals than
> me, will find themselves revisiting what must be a subtle bug. :-(
>
> Thanks very much for your help and patients. Charles Bradshaw
>
> On 10/02/17 10:32, RS wrote:
>>> From: RS Sent: Thursday, February 9, 2017 2:00 PM
>>
>>> You won't get any support for Flash or rtmpdump.  They have been
>>> deprecated for some months, and have been withdrawn in v2.98 of
>>> get_iplayer.
>>
>>> You don't say which version of get_iplayer you are using or which
>>> Flash mode you are trying to receive.  If you have v2.95 or above you
>>> can use the HLS modes.  If you have been receiving Flashhd, try
>>> tvmode=HLShd
>>
>>> You can find a table of modes available in v2.98 at
>>> https://github.com/get-iplayer/get_iplayer/wiki/modesref
>>
>> Sorry, I am being obtuse.  If the downloaded file before multiplexing
>> by ffmpeg has a suffix .mp4.ts, it is not a Flash file generated by
>> rtmpdump. Flash files have a suffix .flv
>> .mp4.ts files are generated by the newer modes, HLS, HVF, and now in
>> v2.98 DVF.
>> The file size with HLShd is the same as the file size with FlashHD.
>> The file size with HLSvhigh is the same as the file size with Flashvhigh.
>>
>> If the files sizes are different it is because you have specified
>> different resolutions in your --tvmode options for the two
>> installations.  That is not necessarily because of something you have
>> done.  Confusingly the defaults have changed between versions of
>> get_iplayer, and the definitions of composite modes such as best and
>> better have also changed.
>>
>> You can see which mode has been used from a line beginning
>> INFO: Trying hlshd1 mode to record
>> where hlshd1 will be replaced with the mode you are using.
>>
>> You are more likely to get similar results between installations if
>> you use the same versions of get_iplayer.  It will also help if you
>> specify the --tvmode explicitly.  I suggest to begin with you stick to
>> hlshd, hlsvhigh, and hlsstd.  Unless your connection is very slow you
>> will find HLS is much faster than Flash, up to 80Mbit/s.
>>
>> You are right that the lack of AtomicParsley will not make your files
>> unplayable.  It may make seeking slower.
>>
>>
>>
>>
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>> http://lists.infradead.org/mailman/listinfo/get_iplayer
>
>
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-- 
terry l. ridder ><>