Testing Video Streams

Troubleshooting Video Traffic

Check for pause frames:


IGMP Snooping:






Simulate video by streaming a short .mp4 video sample using VLC and a virtual switch in GNS3.


Sending PC sending stream using destination RTP/MPEG Transport Stream to address port 5004.

Receiving PC play URL rtp://@

Tip: On sending PC select Properties>Show Settings ALL and under Input / Codecs, Video codecs, FFmpeg enable Allow speed tricks and set Skip the loop filter for H.264 decoding to ALL. Save. This stops the sluggish behaviour on the playback from the sending PC. Even sluggish when plays back locally.

Transcoding options:

Select Activate Transcoding. Profile Video – H.264 + MP3 (MP4).

Miscellaneous Options:

Select Stream all elementary streams.


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