问题
I am trying to stream audio and video via Gstreamer via UDP but playback on VLC only returns video without audio. Currently I am using a sample of Big Buck Bunny and have confirmed that it does have audio. I am planning to use Snowmix to feed media to Gstreamer output in the future.
Streaming from file source via UDP to playback on VLC I currently perform by:
gst-launch-1.0 -v uridecodebin uri=file:///home/me/files/Snowmix-0.5.1/test/big_buck_bunny_720p_H264_AAC_25fps_3400K.MP4 ! queue ! videoconvert ! x264enc ! mpegtsmux ! queue ! udpsink host=230.0.0.1 port=4012 sync=true
which allows me to open a network stream in VLC on my Windows machine to receive packets and only plays video.
What am I missing from my command?
回答1:
As RSATom stated previously, the audio is missing from the pipeline.
The correct pipeline for video and audio is the next (tested with the same input file):
gst-launch-1.0 -v uridecodebin name=uridec uri=file:///home/usuario/Desktop/map/big_buck_bunny_720p_H264_AAC_25fps_3400K.MP4 ! queue ! videoconvert ! x264enc ! video/x-h264 ! mpegtsmux name=mux ! queue ! udpsink host=127.0.0.1 port=5014 sync=true uridec. ! audioconvert ! voaacenc ! audio/mpeg ! queue ! mux.
Remember that in this case you're re-encoding all the content from the source video file, which means high CPU consumption. Other option would be to demux the content from the input file and mux again without encoding (using h264parse and aacparse).
来源：https://stackoverflow.com/questions/41505073/gstreamer-stream-audio-and-video-via-udp-to-be-able-to-playback-on-vlc