[gst-devel] Pipeline to convert a transport stream into an AVI file

[Julien Pauty]

Hello,

Here are the capabilities of avimux and mpegtsdemux:

avimux:

audio/mpeg

SINK template: 'audio_%d'
mpegversion: 1
          layer: [ 1, 3 ]
           rate: [ 1000, 96000 ]
       channels: [ 1, 2 ]
audio/mpeg
    mpegversion: 4
           rate: [ 1000, 96000 ]
       channels: [ 1, 2 ]

SINK template: 'video_%d'
video/mpeg
          width: [ 16, 4096 ]
         height: [ 16, 4096 ]
      framerate: [ 0/1, 2147483647/1 ]
    mpegversion: { 1, 2, 4 }
    systemstream: false

mpegtsdemux:

audio/mpeg
    mpegversion: { 1, 4 }

video/mpeg
      mpegversion: { 1, 2, 4 }
      systemstream: false

To me they seem compatible.

I'm using the last version of gstreamer. For the mpegtsdemux I'm using the
CVS version, only for this plugin though. I wanted to test the very last
version.

Using the ffdemux_mpegts, I'm able to convert the file, but the sound is
bad. It sounds like if the sound is muted several times per second. This is
the pipeline i'm using:

gst-launch avimux name=mux ! filesink location=/tmp/test2.avi sync=true
filesrc location=257.ts do-timestamp=true ! ffdemux_mpegts name=demux
demux.video_00 ! 'video/mpeg'   ! queue ! mux.video_00  demux.audio_00 !
'audio/mpeg' ! queue !  mad ! audioconvert ! lame ! queue ! mux.audio_00

Thank you,

Julien


2008/11/28 Zhao Liang-E3423C <E3423C at motorola.com>

>  more debug log needed, especially the caps of mpegtsdemux srcpads, if
> these srcpad caps are not compatible with avimux, these elements can not be
> connected into one pipeline.
>
> Zhao Liang
>  ------------------------------
> *From:* Julien Pauty [mailto:julien.pauty at gmail.com]
> *Sent:* Friday, November 28, 2008 6:48 AM
> *To:* Discussion of the development of GStreamer
> *Subject:* [gst-devel] Pipeline to convert a transport stream into an AVI
> file
>
> Hello,
>
> I'm trying to convert a file containing transport stream into a regular AVI
> file. Since it's not possible (yet) to seek into a transport stream, I would
> like to convert it into a format where seeking is supported. My idea was to
> extract the video and audio streams and then to store them into an AVI
> container.
>
> I made this pipeline:
> gst-launch avimux name=mux ! filesink location=/tmp/test2.avi  filesrc
> location=257.ts ! mpegtsdemux name=demux demux.video_0078 ! mux.video_00
> demux.audio_0082 !  mux.audio_00
>
> This does not work and exits with the following errors:
>
> Définition du pipeline à PAUSED...
> Le pipeline est en phase de PREROLL...
> ERREUR : de l'élément /GstPipeline:pipeline0/GstFileSrc:filesrc0 : Internal
> data stream error.
> Information de débogage supplémentaire :
> gstbasesrc.c(2234): gst_base_src_loop ():
> /GstPipeline:pipeline0/GstFileSrc:filesrc0:
> streaming task paused, reason not-negotiated (-4)
> ERROR : pipeline refuse to go into setup phase
> Définition du pipeline à NULL...
> Libération du pipeline (FREE)...
>
> (I translated the main info, rest is in french).
>
> I do have a pipeline that convert the file:
>
> gst-launch avimux name=mux ! filesink location=/tmp/test2.avi  filesrc
> location=257.ts ! mpegtsdemux name=demux demux.video_0078 !  queue  !
> mpeg2dec ! ffmpegcolorspace ! mpeg2enc ! queue ! mux.video_00
> demux.audio_0082 ! queue ! mad ! audioconvert ! lame ! queue ! mux.audio_00
>
> This one involves decoding and recoding video, which is useless since the
> formats are the same. I would like to just extract streams and store them
> into a different container.
>
> Is it possible to make such pipeline ? Using avi is not a requirement. I
> just want to convert the transport stream into a format that supports
> seeking well.
>
> Thanks for your help,
>
> Julien
>
>
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