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