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Convert mp4 to mpeg2 transport stream using qtdemux & mpegtsmux

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Raymond Tam

Convert mp4 to mpeg2 transport stream using qtdemux & mpegtsmux

Hi all,

I'm trying to convert a mp4 transport stream file (video: H264, audio: AAC) to mpeg-2 transport stream file.

If I use the following pipeline:

gst-launch filesrc location=input_video.mp4 ! qtdemux ! mpegtsmux m2ts-mode=FALSE ! filesink location=output_video.mpg

then the output file contains audio only.

As an experiment, I then try this pipeline:

gst-launch filesrc location=input_video.mp4 ! qtdemux name=demux demux.video_00 ! mpegtsmux m2ts-mode=FALSE ! filesink location=output_video.mpg

and the output file contains video only. Using VLC player, I can playback this output file without problem, but of course there's no audio.

Can someone please tell me what would be the right pipeline to construct in order to properly perform the conversion?

Thanks in advance.

-Raymond

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Edward Hervey

Re: Convert mp4 to mpeg2 transport stream using qtdemux & mpegtsmux

Administrator

Hi,

You need to creates links for both your streams, ergo something like
this (without properties for understanding):

filesrc ! qtdemux name=demux demux.video_00 ! queue ! mpegtsmux !
filesink demux.audio_00 ! queue ! mpegtsmux

Edward

On Fri, 2009-03-13 at 15:15 -0700, Raymond Tam wrote:

> Hi all,
>
> I'm trying to convert a mp4 transport stream file (video: H264, audio: AAC) to mpeg-2 transport stream file.
>
>
> If I use the following pipeline:
>
> gst-launch filesrc location=input_video.mp4 ! qtdemux ! mpegtsmux m2ts-mode=FALSE ! filesink location=output_video.mpg
>
> then the output file contains audio only.
>
>
> As an experiment, I then try this pipeline:
>
> gst-launch filesrc location=input_video.mp4 ! qtdemux name=demux demux.video_00 ! mpegtsmux m2ts-mode=FALSE ! filesink location=output_video.mpg
>
> and the output file contains video only. Using VLC player, I can playback this output file without problem, but of course there's no audio.
>
>
> Can someone please tell me what would be the right pipeline to construct in order to properly perform the conversion?
>
> Thanks in advance.
>
> -Raymond
>
>
> ------------------------------------------------------------------------------
> Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are
> powering Web 2.0 with engaging, cross-platform capabilities. Quickly and
> easily build your RIAs with Flex Builder, the Eclipse(TM)based development
> software that enables intelligent coding and step-through debugging.
> Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel

------------------------------------------------------------------------------
Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are
powering Web 2.0 with engaging, cross-platform capabilities. Quickly and
easily build your RIAs with Flex Builder, the Eclipse(TM)based development
software that enables intelligent coding and step-through debugging.
Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com
_______________________________________________
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Raymond Tam

Re: Convert mp4 to mpeg2 transport stream using qtdemux & mpegtsmux

In reply to this post by Raymond Tam

Thanks Edward. But it still doesn't quite work.

If I do this (with properties added):

gst-launch filesrc location=input_video.mp4 ! qtdemux name=demux demux.video_00 ! queue ! mpegtsmux ! filesink location=output_video.mpg demux.audio_00 ! queue ! mpegtsmux

then I get this error in qtdemux:

Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
ERROR: from element /GstPipeline:pipeline0/GstQTDemux:demux: GStreamer encountered a general stream error.
Additional debug info:
/home/rtam/depot/mp/avstreaming/libs/gst-plugins-good-0.10.8/gst/qtdemux/qtdemux.c(1842): gst_qtdemux_loop (): /GstPipeline:pipeline0/GstQTDemux:demux:
streaming stopped, reason error
ERROR: pipeline doesn't want to preroll.
Setting pipeline to NULL ...
FREEING pipeline ...

Then I thought may be I need to put "filesink" also for the audio, so I try this:

gst-launch filesrc location=input_video.mp4 ! qtdemux name=demux demux.video_00 ! queue ! mpegtsmux ! filesink location=output_video.mpg demux.audio_00 ! queue ! mpegtsmux ! filesink location=output_video.mpg

but the resulting file (output_video.mpg) has only audio when played-back with VLC.

How can I get "mpegtsmux" to mux properly?

Thanks,
Raymond

-----Original Message-----
Date: Sat, 14 Mar 2009 09:54:37 +0100
From: Edward Hervey <[hidden email]>
Subject: Re: [gst-devel] Convert mp4 to mpeg2 transport stream using
qtdemux & mpegtsmux
To: Discussion of the development of GStreamer
<[hidden email]>
Message-ID: <1237020877.2539.15.camel@putamadre>
Content-Type: text/plain

Hi,

You need to creates links for both your streams, ergo something like
this (without properties for understanding):

filesrc ! qtdemux name=demux demux.video_00 ! queue ! mpegtsmux !
filesink demux.audio_00 ! queue ! mpegtsmux

Edward

On Fri, 2009-03-13 at 15:15 -0700, Raymond Tam wrote:

Edward Hervey

Re: Convert mp4 to mpeg2 transport stream using qtdemux & mpegtsmux

Administrator

On Sat, 2009-03-14 at 15:38 -0700, Raymond Tam wrote:
> Thanks Edward. But it still doesn't quite work.
>
> If I do this (with properties added):
>
> gst-launch filesrc location=input_video.mp4 ! qtdemux name=demux
> demux.video_00 ! queue ! mpegtsmux ! filesink
> location=output_video.mpg demux.audio_00 ! queue ! mpegtsmux

There was a mistake in the launch-line, the muxer wasn't used by name.
it should be:

gst-launch filesrc location=input_video.mp4 ! qtdemux name=demux
demux.video_00 ! queue ! mpegtsmux name=mux ! filesink
location=output_video.mpg demux.audio_00 ! queue ! mux.

Edward

> > then the output file contains audio only.
> >
> >
> > As an experiment, I then try this pipeline:
> >
> > gst-launch filesrc location=input_video.mp4 ! qtdemux name=demux demux.video_00 ! mpegtsmux m2ts-mode=FALSE ! filesink location=output_video.mpg
> >
> > and the output file contains video only. Using VLC player, I can playback this output file without problem, but of course there's no audio.
> >
> >
> > Can someone please tell me what would be the right pipeline to construct in order to properly perform the conversion?
> >
> > Thanks in advance.
> >
> > -Raymond
>
> ------------------------------------------------------------------------------
> Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are
> powering Web 2.0 with engaging, cross-platform capabilities. Quickly and
> easily build your RIAs with Flex Builder, the Eclipse(TM)based development
> software that enables intelligent coding and step-through debugging.
> Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel

Raymond Tam

Re: Convert mp4 to mpeg2 transport stream using qtdemux & mpegtsmux

In reply to this post by Raymond Tam

Something is still not right with the pipeline.

When I use the pipeline, it exits immediately complaining not finding the "mux":

[root@BB /]# gst-launch filesrc location=input_video.mp4 ! qtdemux name=demux demux.video_00 ! queue ! mpegtsmux name=mux ! filesink location=output_video.mpg demux.audio_00 ! queue ! mux
WARNING: erroneous pipeline: no element "mux"
[root@BB /]#

Any idea?

Thanks,
Raymond

-----Original Message-----
Date: Sun, 15 Mar 2009 14:25:16 +0100
From: Edward Hervey <[hidden email]>
Subject: Re: [gst-devel] Convert mp4 to mpeg2 transport stream using
qtdemux & mpegtsmux
To: Discussion of the development of GStreamer
<[hidden email]>
Message-ID: <1237123516.5357.2.camel@putamadre>
Content-Type: text/plain

On Sat, 2009-03-14 at 15:38 -0700, Raymond Tam wrote:
> Thanks Edward. But it still doesn't quite work.
>
> If I do this (with properties added):
>
> gst-launch filesrc location=input_video.mp4 ! qtdemux name=demux
> demux.video_00 ! queue ! mpegtsmux ! filesink
> location=output_video.mpg demux.audio_00 ! queue ! mpegtsmux

There was a mistake in the launch-line, the muxer wasn't used by name.
it should be:

gst-launch filesrc location=input_video.mp4 ! qtdemux name=demux
demux.video_00 ! queue ! mpegtsmux name=mux ! filesink
location=output_video.mpg demux.audio_00 ! queue ! mux.

Edward

Ron McOuat

Re: Convert mp4 to mpeg2 transport stream using qtdemux & mpegtsmux

Add a . to the end of the pipeline

gst-launch filesrc location=input_video.mp4 ! qtdemux name=demux demux.video_00 ! queue ! mpegtsmux name=mux ! filesink location=output_video.mpg demux.audio_00 ! queue ! mux.

Raymond Tam wrote:

> Something is still not right with the pipeline.
>
> When I use the pipeline, it exits immediately complaining not finding the "mux":
>
> [root@BB /]# gst-launch filesrc location=input_video.mp4 ! qtdemux name=demux demux.video_00 ! queue ! mpegtsmux name=mux ! filesink location=output_video.mpg demux.audio_00 ! queue ! mux
> WARNING: erroneous pipeline: no element "mux"
> [root@BB /]#
>
> Any idea?
>
> Thanks,
> Raymond
>
>
> -----Original Message-----
> Date: Sun, 15 Mar 2009 14:25:16 +0100
> From: Edward Hervey <[hidden email]>
> Subject: Re: [gst-devel] Convert mp4 to mpeg2 transport stream using
> qtdemux & mpegtsmux
> To: Discussion of the development of GStreamer
> <[hidden email]>
> Message-ID: <1237123516.5357.2.camel@putamadre>
> Content-Type: text/plain
>
> On Sat, 2009-03-14 at 15:38 -0700, Raymond Tam wrote:
>
>> Thanks Edward. But it still doesn't quite work.
>>
>> If I do this (with properties added):
>>
>> gst-launch filesrc location=input_video.mp4 ! qtdemux name=demux
>> demux.video_00 ! queue ! mpegtsmux ! filesink
>> location=output_video.mpg demux.audio_00 ! queue ! mpegtsmux
>>
>
> There was a mistake in the launch-line, the muxer wasn't used by name.
> it should be:
>
> gst-launch filesrc location=input_video.mp4 ! qtdemux name=demux
> demux.video_00 ! queue ! mpegtsmux name=mux ! filesink
> location=output_video.mpg demux.audio_00 ! queue ! mux.
>
> Edward
>
>
>>> then the output file contains audio only.
>>>
>>>
>>> As an experiment, I then try this pipeline:
>>>
>>> gst-launch filesrc location=input_video.mp4 ! qtdemux name=demux demux.video_00 ! mpegtsmux m2ts-mode=FALSE ! filesink location=output_video.mpg
>>>
>>> and the output file contains video only. Using VLC player, I can playback this output file without problem, but of course there's no audio.
>>>
>>>
>>> Can someone please tell me what would be the right pipeline to construct in order to properly perform the conversion?
>>>
>>> Thanks in advance.
>>>
>>> -Raymond
>>>
>
> ------------------------------------------------------------------------------
> Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are
> powering Web 2.0 with engaging, cross-platform capabilities. Quickly and
> easily build your RIAs with Flex Builder, the Eclipse(TM)based development
> software that enables intelligent coding and step-through debugging.
> Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>
>

Raymond Tam

Re: Convert mp4 to mpeg2 transport stream using qtdemux & mpegtsmux

In reply to this post by Raymond Tam

That works! Thank you Ron and Edward (sorry Edward I missed the dot at the end).
Can you explain the meaning of the dot in the pipeline?

Thanks,
Raymond

-----Original Message-----
Date: Sun, 15 Mar 2009 11:01:15 -0700
From: Ron McOuat <[hidden email]>
Subject: Re: [gst-devel] Convert mp4 to mpeg2 transport stream using
qtdemux & mpegtsmux
To: Discussion of the development of GStreamer
<[hidden email]>
Message-ID: <[hidden email]>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Add a . to the end of the pipeline

gst-launch filesrc location=input_video.mp4 ! qtdemux name=demux demux.video_00 ! queue ! mpegtsmux name=mux ! filesink location=output_video.mpg demux.audio_00 ! queue ! mux.

Raymond Tam wrote:

Ron McOuat

Re: Convert mp4 to mpeg2 transport stream using qtdemux & mpegtsmux

Without the dot gst-launch will look for an element type or class of mux
for which there is none in existence in the same way it looks for and
finds queue, mpegtsmux and filesink as other examples of elements used
to assemble this pipeline. When you change mux to mux. gst-launch looks
for an element in the pipeline with the name attribute of "mux" which
was defined earlier in the video branch of the pipeline when mpegtsmux
was first defined with the name=mux attribute. This is what makes it
possible to define both the audio and video branch of a pipeline as a
set of command line parameters. Draw it out as a set of boxes with a
line between boxes for each ! and as you work through the command line
you will notice there is only a space between the filesink with location
and the demux.audio_00 ! queue ! mux. which defines the audio portion of
the pipeline between the qtdemux and mpegtsmux elements. In the example
you have that works demux.video_00 and demux.audio_00 both refer back to
qtdemux name=demux and since they are at the head of the section of
pipeline refer to the video and audio src pads on qtdemux.

Raymond Tam wrote:

> That works! Thank you Ron and Edward (sorry Edward I missed the dot at the end).
> Can you explain the meaning of the dot in the pipeline?
>
> Thanks,
> Raymond
>
>
> -----Original Message-----
> Date: Sun, 15 Mar 2009 11:01:15 -0700
> From: Ron McOuat <[hidden email]>
> Subject: Re: [gst-devel] Convert mp4 to mpeg2 transport stream using
> qtdemux & mpegtsmux
> To: Discussion of the development of GStreamer
> <[hidden email]>
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Add a . to the end of the pipeline
>
> gst-launch filesrc location=input_video.mp4 ! qtdemux name=demux demux.video_00 ! queue ! mpegtsmux name=mux ! filesink location=output_video.mpg demux.audio_00 ! queue ! mux.
>
>
>
> Raymond Tam wrote:
>
>> Something is still not right with the pipeline.
>>
>> When I use the pipeline, it exits immediately complaining not finding the "mux":
>>
>> [root@BB /]# gst-launch filesrc location=input_video.mp4 ! qtdemux name=demux demux.video_00 ! queue ! mpegtsmux name=mux ! filesink location=output_video.mpg demux.audio_00 ! queue ! mux
>> WARNING: erroneous pipeline: no element "mux"
>> [root@BB /]#
>>
>> Any idea?
>>
>> Thanks,
>> Raymond
>>
>>
>> -----Original Message-----
>> Date: Sun, 15 Mar 2009 14:25:16 +0100
>> From: Edward Hervey <[hidden email]>
>> Subject: Re: [gst-devel] Convert mp4 to mpeg2 transport stream using
>> qtdemux & mpegtsmux
>> To: Discussion of the development of GStreamer
>> <[hidden email]>
>> Message-ID: <1237123516.5357.2.camel@putamadre>
>> Content-Type: text/plain
>>
>> On Sat, 2009-03-14 at 15:38 -0700, Raymond Tam wrote:
>>
>>
>>> Thanks Edward. But it still doesn't quite work.
>>>
>>> If I do this (with properties added):
>>>
>>> gst-launch filesrc location=input_video.mp4 ! qtdemux name=demux
>>> demux.video_00 ! queue ! mpegtsmux ! filesink
>>> location=output_video.mpg demux.audio_00 ! queue ! mpegtsmux
>>>
>>>
>> There was a mistake in the launch-line, the muxer wasn't used by name.
>> it should be:
>>
>> gst-launch filesrc location=input_video.mp4 ! qtdemux name=demux
>> demux.video_00 ! queue ! mpegtsmux name=mux ! filesink
>> location=output_video.mpg demux.audio_00 ! queue ! mux.
>>
>> Edward
>>
>>
>>
>>>> then the output file contains audio only.
>>>>
>>>>
>>>> As an experiment, I then try this pipeline:
>>>>
>>>> gst-launch filesrc location=input_video.mp4 ! qtdemux name=demux demux.video_00 ! mpegtsmux m2ts-mode=FALSE ! filesink location=output_video.mpg
>>>>
>>>> and the output file contains video only. Using VLC player, I can playback this output file without problem, but of course there's no audio.
>>>>
>>>>
>>>> Can someone please tell me what would be the right pipeline to construct in order to properly perform the conversion?
>>>>
>>>> Thanks in advance.
>>>>
>>>> -Raymond
>>>>
>
> ------------------------------------------------------------------------------
> Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are
> powering Web 2.0 with engaging, cross-platform capabilities. Quickly and
> easily build your RIAs with Flex Builder, the Eclipse(TM)based development
> software that enables intelligent coding and step-through debugging.
> Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel
>
>

Edward Hervey

Re: Convert mp4 to mpeg2 transport stream using qtdemux & mpegtsmux

Administrator

In reply to this post by Raymond Tam

On Sun, 2009-03-15 at 15:45 -0700, Raymond Tam wrote:
> That works! Thank you Ron and Edward (sorry Edward I missed the dot at the end).
> Can you explain the meaning of the dot in the pipeline?

It means you want to connect queue to a pad of "mux" (which is the
name we gave to mpegtsmux).

Edward

>
> Thanks,
> Raymond
>
>
> -----Original Message-----
> Date: Sun, 15 Mar 2009 11:01:15 -0700
> From: Ron McOuat <[hidden email]>
> Subject: Re: [gst-devel] Convert mp4 to mpeg2 transport stream using
> qtdemux & mpegtsmux
> To: Discussion of the development of GStreamer
> <[hidden email]>
> Message-ID: <[hidden email]>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Add a . to the end of the pipeline
>
> gst-launch filesrc location=input_video.mp4 ! qtdemux name=demux demux.video_00 ! queue ! mpegtsmux name=mux ! filesink location=output_video.mpg demux.audio_00 ! queue ! mux.
>
>
>
> Raymond Tam wrote:
> > Something is still not right with the pipeline.
> >
> > When I use the pipeline, it exits immediately complaining not finding the "mux":
> >
> > [root@BB /]# gst-launch filesrc location=input_video.mp4 ! qtdemux name=demux demux.video_00 ! queue ! mpegtsmux name=mux ! filesink location=output_video.mpg demux.audio_00 ! queue ! mux
> > WARNING: erroneous pipeline: no element "mux"
> > [root@BB /]#
> >
> > Any idea?
> >
> > Thanks,
> > Raymond
> >
> >
> > -----Original Message-----
> > Date: Sun, 15 Mar 2009 14:25:16 +0100
> > From: Edward Hervey <[hidden email]>
> > Subject: Re: [gst-devel] Convert mp4 to mpeg2 transport stream using
> > qtdemux & mpegtsmux
> > To: Discussion of the development of GStreamer
> > <[hidden email]>
> > Message-ID: <1237123516.5357.2.camel@putamadre>
> > Content-Type: text/plain
> >
> > On Sat, 2009-03-14 at 15:38 -0700, Raymond Tam wrote:
> >
> >> Thanks Edward. But it still doesn't quite work.
> >>
> >> If I do this (with properties added):
> >>
> >> gst-launch filesrc location=input_video.mp4 ! qtdemux name=demux
> >> demux.video_00 ! queue ! mpegtsmux ! filesink
> >> location=output_video.mpg demux.audio_00 ! queue ! mpegtsmux
> >>
> >
> > There was a mistake in the launch-line, the muxer wasn't used by name.
> > it should be:
> >
> > gst-launch filesrc location=input_video.mp4 ! qtdemux name=demux
> > demux.video_00 ! queue ! mpegtsmux name=mux ! filesink
> > location=output_video.mpg demux.audio_00 ! queue ! mux.
> >
> > Edward
> >
> >
> >>> then the output file contains audio only.
> >>>
> >>>
> >>> As an experiment, I then try this pipeline:
> >>>
> >>> gst-launch filesrc location=input_video.mp4 ! qtdemux name=demux demux.video_00 ! mpegtsmux m2ts-mode=FALSE ! filesink location=output_video.mpg
> >>>
> >>> and the output file contains video only. Using VLC player, I can playback this output file without problem, but of course there's no audio.
> >>>
> >>>
> >>> Can someone please tell me what would be the right pipeline to construct in order to properly perform the conversion?
> >>>
> >>> Thanks in advance.
> >>>
> >>> -Raymond
>
> ------------------------------------------------------------------------------
> Apps built with the Adobe(R) Flex(R) framework and Flex Builder(TM) are
> powering Web 2.0 with engaging, cross-platform capabilities. Quickly and
> easily build your RIAs with Flex Builder, the Eclipse(TM)based development
> software that enables intelligent coding and step-through debugging.
> Download the free 60 day trial. http://p.sf.net/sfu/www-adobe-com
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> https://lists.sourceforge.net/lists/listinfo/gstreamer-devel