vlc streaming vs libvlc streaming

[kuro6]

Hi,

this problem is so weird, i am here to get some help.
vlc streaming is always works, but source code using libvlc still didn't worked.
i don't know the reason?

source rtsp stream url:
rtsp://xxx.xxx.xxx.xxx:554/test.sdp

in vlc player, i have had to set rtsp stream using wizard gui to re-stream, like this:

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:sout=#transcode{vcodec=h264,scale=0.5,acodec=none}:rtp{sdp=rtsp://:8554/test.sdp} :sout-keep

and in source code using libvlc, like this:

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... const char *sout = "#transcode{vcodec=h264,scale=0.5,acodec=none}:rtp{sdp=rtsp://:8554/test.sdp}"; const char *params[] = { ":sout-keep" }; libvlc_instance_t * vlc = libvlc_new(0, NULL); libvlc_vlm_add_broadcast(vlc, media_name, "rtsp://xxx.xxx.xxx.xxx:554/test.sdp", sout, 1, params, true, false); libvlc_vlm_play_media(vlc, media_name); ...

[Jean-Baptiste Kempf]

Why are you using vlm?

[kuro6]

you are right, i don't have to.
if i have to modify the streaming data, just video filter for it.

but, libvlc's license is LGPL, may be that is reason.

[kuro6]

libvlc source code,

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const char *sout = "#transcode{vcodec=h264,scale=0.5,acodec=none}:rtp{sdp=rtsp://:8554/test.sdp}"; const char *params[] = { ":sout-keep" }; libvlc_instance_t * vlc = libvlc_new(0, NULL); libvlc_vlm_add_broadcast(vlc, media_name, "rtsp://xxx.xxx.xxx.xxx:554/test.sdp", sout, 1, params, true, false);

localhost (127.0.0.1) shows the stream, but in other computer(local network: 192.168.x.x),
data transferred, but not decoded.

Tools -> Media Information -> Codec

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Stream 0 Codec: H264 -MPEG-4 AVC (part 10) (h264) Resolution: 368x256 //not shown in other computer Display resolution: 368x246 //not shown in other computer Frame rate: 12 //not shown in other computer Decoded format: Planar 4:2:0 YVU //not shown in other computer

and i ran linux version vlc client

working version sdp (vlc)

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v=0 o=- 15790958616157550832 15790958616157550832 IN IP4 MSDN-SPECIAL s=Unnamed i=N/A c=IN IP4 0.0.0.0 t=0 0 a=tool:vlc 2.2.5 a=recvonly a=type:broadcast a=charset:UTF-8 a=control:rtsp://192.168.xxx.xxx:8554/test.sdp m=video 0 RTP/AVP 96 b=RR:0 a=rtpmap:96 H264/90000 a=fmtp:96 packetization-mode=1;profile-level-id=42c00c;sprop-parameter-sets=Z0LADNoFwh+b/wFxAXAQAAADABAAAAMBiPFCqg==,aM4PyA==; a=control:rtsp://192.168.xxx.xxx:8554/test.sdp/trackID=0

not working sdp (libvlc)

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v=0 o=- 15790959369669001244 15790959369669001244 IN IP4 MSDN-SPECIAL s=Unnamed i=N/A c=IN IP4 0.0.0.0 t=0 0 a=tool:vlc 2.2.5 a=recvonly a=type:broadcast a=charset:UTF-8 a=control:rtsp://192.168.xxx.xxx:8554/test.sdp m=video 0 RTP/AVP 96 b=RR:0 a=rtpmap:96 H264/90000 a=fmtp:96 packetization-mode=1;profile-level-id=64000c;sprop-parameter-sets=Z2QADKzZQXCH5v/AXEBcBAAAAwAEAAADAGI8UKZY,aOvjyyLA; a=control:rtsp://192.168.xxx.xxx:8554/test.sdp/trackID=0

[kuro6]

i think i found the reason,
adjusting libvlc venc parameters shows me the streams( stream quality is not good though).

i guess that libvlc transcode encoding is not mature,
so vlc decoder couldn't doing it's job.