Something

 gst-launch -v ffmux_mpegts name=mpegmux ! filesink location=foo.trp { filesrc location=CLabs_misc19Mbsbug.trp ! ffdemux_mpegts name=mpegts ! { queue ! ffdec_mpeg2video ! ffdeinterlace ! ffvideoscale ! "video/x-raw-yuv, width=1280, height=720" ! ffmpegcolorspace ! queue ! typefind ! ffenc_mpeg2video ! queue ! mpegmux.video_00 } { mpegts.audio_00 ! queue ! mpegmux.audio_00 } }