Why mp4 or mp4.ts from identical installation?

[Charles Bradshaw]

Maybe ;-}

On 10/02/17 20:01, artisticforge . wrote:
> 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 deprecated for some months, and have been withdrawn in v2.98 of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.
>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> get_iplayer mailing list
>>> get_iplayer at lists.infradead.org
>>> http://lists.infradead.org/mailman/listinfo/get_iplayer
>>
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>
>