Hello Stackoverflow :3
I have been trying to increase the fps and effectively decreasing the duration while increasing the speed when streaming a video from my hard drive using vlc. I would like to transcode while I am streaming if possible. I can already speed up the video before streaming however that is not the desired task.
The command I use for streaming regularly is (note xxx.xxx.x.xxx represents my ip):
vlc --intf dummy -vvv /Users/amr/Downloads/bigbangsample.mp4 --sout '#rtp{dst=127.0.0.1,port=1234,sdp=rtsp://xxx.xxx.x.xxx:1236/test.sdp}'
After following tips from Change Frames Per Second for VLC Stream I have tried transcoding using the command:
vlc --intf dummy -vvv /Users/amr/Downloads/bigbangsample.mp4 --sout='#transcode{fps=60}:rtp{dst=127.0.0.1,port=1234,sdp=rtsp://xxx.xxx.x.xxx:1236/test.sdp}'
Although I can still view the stream with no warnings or errors the video does not seem to be affected at all.
I am unsure if my command is wrong or if the fps really has been changed but by copying the frames to keep the duration the same. I am new to vlc and video processing and would appreciate any input.
UPDATE: ffprobe (see below) seems to show that the fps hasn't changed. Is there a standard way to change stream fps ?
Input #0, rtsp, from 'rtsp://xxx.xxx.x.xxx:1236/test.sdp':
Metadata:
title : Unnamed
comment : N/A
Duration: N/A, start: 21.377938, bitrate: N/A
Stream #0:0: Audio: aac (LC), 48000 Hz, stereo, fltp
Stream #0:1: Video: h264 (High), yuv420p(tv, bt709/unknown/unknown, progressive), 720x404 [SAR 1:1 DAR 180:101], 23.98 fps, 23.98 tbr, 90k tbn, 47.95 tbc
Thank you for your time.
I think that you have to add the vcodec, even if it's the same. So try
vlc --intf dummy -vvv /Users/amr/Downloads/bigbangsample.mp4 --sout='#transcode{vcodec=h264,fps=60}:rtp{dst=127.0.0.1,port=1234,sdp=rtsp://xxx.xxx.x.xxx:1236/test.sdp}'
(worked for me at least)