GStreamer multiple output transcoding with deduplication of media streams.

transcode-avi.sh

#!/bin/bash
# Note: use x264enc tune=zerolatency or bigger queues
# NOT WORKING! stalled at prerolling

gst-launch-1.0 filesrc location=VfE.webm ! decodebin name=dmux \
    dmux. ! videoconvert ! tee name=vo \
    dmux. ! audioconvert ! tee name=au \
    webmmux name=webm ! progressreport name=webmprogress ! filesink location=out.webm \
    avimux name=avi ! progressreport name=aviprogress ! filesink location=out.avi \
    vo. ! queue ! vp8enc ! webm. \
    au. ! queue ! vorbisenc ! webm. \
    vo. ! queue ! x264enc tune=zerolatency ! avi. \
    au. ! queue ! lamemp3enc ! avi.

transcode-ogg-dedup.sh

#!/bin/bash

gst-launch-1.0 filesrc location=VfE.webm ! decodebin name=dmux \
    dmux. ! videoconvert ! tee name=vo \
    dmux. ! audioconvert name=ac ! tee name=au \
    webmmux name=webm ! progressreport name=webmprogress ! filesink location=out-dedup.webm \
    oggmux name=ogg ! progressreport name=oggprogress ! filesink location=out-dedup.ogv \
    vo. ! queue ! vp8enc ! webm. \
    vo. ! queue ! theoraenc ! ogg. \
    au. ! queue ! vorbisenc ! tee name=ve \
    ve. ! queue ! ogg. \
    ve. ! queue ! webm.

transcode-ogg.sh

#!/bin/bash

gst-launch-1.0 filesrc location=VfE.webm \
    ! decodebin name=dmux \
    dmux. ! videoconvert ! tee name=vo \
    dmux. ! audioconvert ! tee name=au \
    webmmux name=webm ! progressreport name=webmprogress ! filesink location=out.webm \
    oggmux name=ogg ! progressreport name=oggprogress ! filesink location=out.ogv \
    vo. ! queue ! vp8enc ! webm. \
    au. ! queue ! vorbisenc ! webm. \
    vo. ! queue ! theoraenc ! ogg. \
    au. ! queue ! vorbisenc ! ogg.