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sub part of a movie

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Julien Isorce

sub part of a movie

Hi,

I would like to extract a sub part of a movie which is in an avi file.
I can only extract a sub part from the beginnning with the following pipeline :
(assume movie.avi is at 25 fps for 1 min)
gst-launch filesrc location=movie.avi num_buffers=100 ! avidemux ! avimux ! filesink location=submovie.avi
It extracts 4 sec from the beginning.

Is there a way to extract 4 secs in the middle of the movie ? (I mean not from the beginnig, so start after N buffers, as I do to end after num_buffers) ?

Thx

Sincerely

Julien

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Florent THIERY-2

Re: sub part of a movie

Hi Julien;

Did you take a look at gentrans ?

C.f. "Example 2.5. Pass-through transcoding" in http://gentrans.sourceforge.net/docs/head/manual/html/entrans.html

Florent

Julien Isorce

Re: sub part of a movie

Hi Florent,

Sounds good but when I tried this :

(movie.avi is about 1 min)

entrans.py -s seek-key -c 25-50 -- --raw filesrc location=movie.avi ! avidemux ! avimux ! filesink location=submovie.avi

I got:

0:00:00.057245653 23852 0x8270cc8 ERROR               python entrans.py:2354:excepthook:
File "entrans.py", line 1825, in cb_started
    walk = self.walk_pipeline(self.nonlin.pipeline)
File "entrans.py", line 1780, in walk_pipeline
    clone_element(element).get_property(pspec.name)):

SystemError: error return without exception set

<<<< Now reached PLAYING state >>>>
0:00:00.060644767 23852 0x8270cc8 ERROR               python entrans.py:2354:excepthook:
File "entrans.py", line 1902, in cb_playing
    walk = self.walk_pipeline(self.nonlin.pipeline)
File "entrans.py", line 1780, in walk_pipeline
    clone_element(element).get_property(pspec.name)):

SystemError: error return without exception set

I am sure I am doing something wrong.
I compiled gentrans myself so maybe I have not all the dependencies.

Any help ?

(why dam this : Cannot set property on dam0 before streaming has started ?)

thx

Julien

2008/9/11 Florent <[hidden email]>

Hi Julien;

Did you take a look at gentrans ?

C.f. "Example 2.5. Pass-through transcoding" in http://gentrans.sourceforge.net/docs/head/manual/html/entrans.html

Florent

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Mark Nauwelaerts-2

Re: sub part of a movie

The exception is most likely an effect of bug
http://bugzilla.gnome.org/show_bug.cgi?id=540221, the fix for which may not be
present in your gst-python (or otherwise another bug very much like it :) )

It can be worked around (IIRC) by adding the option --ignore-prop '.*sink.*'
(so it does not access the sink's property leading to the crash).

I also have some doubts about the chances for success of the pipeline
(e.g. no dam in it, entrans uses this element to direct the seek to ...)
Using a more "conventional" pipeline as exampled in the link mentioned below may
be advisable.

Mark.

Julien Isorce wrote:

> Hi Florent,
>
> Sounds good but when I tried this :
>
> (movie.avi is about 1 min)
>
> entrans.py -s seek-key -c 25-50 -- --raw filesrc location=movie.avi !
> avidemux ! avimux ! filesink location=submovie.avi
>
> I got:
>
> 0:00:00.057245653 23852 0x8270cc8 ERROR python
> entrans.py:2354:excepthook:
> File "entrans.py", line 1825, in cb_started
> walk = self.walk_pipeline(self.nonlin.pipeline)
> File "entrans.py", line 1780, in walk_pipeline
> clone_element(element).get_property(pspec.name <http://pspec.name>)):
>
> SystemError: error return without exception set
>
> <<<< Now reached PLAYING state >>>>
> 0:00:00.060644767 23852 0x8270cc8 ERROR python
> entrans.py:2354:excepthook:
> File "entrans.py", line 1902, in cb_playing
> walk = self.walk_pipeline(self.nonlin.pipeline)
> File "entrans.py", line 1780, in walk_pipeline
> clone_element(element).get_property(pspec.name <http://pspec.name>)):
>
> SystemError: error return without exception set
>
>
> I am sure I am doing something wrong.
> I compiled gentrans myself so maybe I have not all the dependencies.
>
> Any help ?
>
> (why dam this : Cannot set property on dam0 before streaming has started ?)
>
> thx
>
> Julien
>
>
> 2008/9/11 Florent <[hidden email] <mailto:[hidden email]>>
>
> Hi Julien;
>
> Did you take a look at gentrans ?
>
> C.f. "Example 2.5. Pass-through transcoding" in
> http://gentrans.sourceforge.net/docs/head/manual/html/entrans.html
>
> Florent
>
> -------------------------------------------------------------------------
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> challenge
> Build the coolest Linux based applications with Moblin SDK & win
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> the world
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>
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Julien Isorce

Re: sub part of a movie

Hi Mark,

Thanks to GEtrans I can now easily extract a sub part of a movie so that 's cool for my needs.

** This cammand works fine to cut a sub part of 15 sec of a movie. :P

entrans.py --ignore-prop '.*sink*.' -s seek-key -c 25-40 --dam -- --raw filesrc location=movie.avi ! avidemux name=demux avimux name=mux ! filesink location=sub.avi demux.video_00 ! queue ! dam ! queue ! mux.video_0 demux.audio_00 ! queue ! dam ! queue ! mux.audio_00

** The following seems to work but I cannot play the result sub2.avi:

entrans.py --ignore-prop '.*sink.*' -s seek-key -c 25-40 --dam -- --raw filesrc location=movie.avi ! avidemux ! queue ! dam ! queue ! avimux ! filesink location=sub2.avi

** And the following causes a seg fault:

entrans.py --ignore-prop '.*sink.*' -s seek-key -c 25-40 --dam -- --raw filesrc location=movie.avi ! avidemux ! dam ! avimux ! filesink location=sub3.avi

I am sure I am not using correctly entrans in the 2 last pipelines :P

(Also it was cool to see an element "detectinter" ...)

Sincerely

J.I.

2008/9/11 Mark Nauwelaerts <[hidden email]>

The exception is most likely an effect of bug
http://bugzilla.gnome.org/show_bug.cgi?id=540221, the fix for which may not be
present in your gst-python (or otherwise another bug very much like it :) )

It can be worked around (IIRC) by adding the option --ignore-prop '.*sink.*'
(so it does not access the sink's property leading to the crash).

I also have some doubts about the chances for success of the pipeline
(e.g. no dam in it, entrans uses this element to direct the seek to ...)
Using a more "conventional" pipeline as exampled in the link mentioned below may
be advisable.

Mark.

Julien Isorce wrote:
> Hi Florent,
>
> Sounds good but when I tried this :
>
> (movie.avi is about 1 min)
>
> entrans.py -s seek-key -c 25-50 -- --raw filesrc location=movie.avi !
> avidemux ! avimux ! filesink location=submovie.avi
>
> I got:
>
> 0:00:00.057245653 23852 0x8270cc8 ERROR python
> entrans.py:2354:excepthook:
> File "entrans.py", line 1825, in cb_started
> walk = self.walk_pipeline(self.nonlin.pipeline)
> File "entrans.py", line 1780, in walk_pipeline

> clone_element(element).get_property(pspec.name <http://pspec.name>)):

>
> SystemError: error return without exception set
>
> <<<< Now reached PLAYING state >>>>
> 0:00:00.060644767 23852 0x8270cc8 ERROR python
> entrans.py:2354:excepthook:
> File "entrans.py", line 1902, in cb_playing
> walk = self.walk_pipeline(self.nonlin.pipeline)
> File "entrans.py", line 1780, in walk_pipeline

> clone_element(element).get_property(pspec.name <http://pspec.name>)):

>
> SystemError: error return without exception set
>
>
> I am sure I am doing something wrong.
> I compiled gentrans myself so maybe I have not all the dependencies.
>
> Any help ?
>
> (why dam this : Cannot set property on dam0 before streaming has started ?)
>
> thx
>
> Julien
>
>

> 2008/9/11 Florent <[hidden email] <mailto:[hidden email]>>

>
> Hi Julien;
>
> Did you take a look at gentrans ?
>
> C.f. "Example 2.5. Pass-through transcoding" in
> http://gentrans.sourceforge.net/docs/head/manual/html/entrans.html
>
> Florent
>
> -------------------------------------------------------------------------
> This SF.Net email is sponsored by the Moblin Your Move Developer's
> challenge
> Build the coolest Linux based applications with Moblin SDK & win
> great prizes
> Grand prize is a trip for two to an Open Source event anywhere in
> the world
> http://moblin-contest.org/redirect.php?banner_id=100&url=/
> <http://moblin-contest.org/redirect.php?banner_id=100&url=/>
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]

> <mailto:[hidden email]>

> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>
>
>

> ------------------------------------------------------------------------

>
> -------------------------------------------------------------------------
> This SF.Net email is sponsored by the Moblin Your Move Developer's challenge
> Build the coolest Linux based applications with Moblin SDK & win great prizes
> Grand prize is a trip for two to an Open Source event anywhere in the world
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>
>
> ------------------------------------------------------------------------
>
> _______________________________________________
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