On Mon, 15 Jun 2020 at 09:37, Yannick Barbeaux <yannick.barbe...@keemotion.com> wrote: > > Hello > I am struggling to read a multicast audio RTP stream controlled by RTSP. As > soon as I launch the ffplay or ffmpeg command, the RTP traffic starts > (tcpdump) on port 5004/UDP (as advertised in the SDP file), so it should > read the stream correctly but I finally get a time-out instead (and empty > out file). The very same RTSP URL can be read without any issue with VLC or > with rtpdump+sox. > > $ ffmpeg -y -rtsp_transport udp_multicast -i "rtsp:// > 192.168.2.148:554/by-name/AES67-stream (on hasseb-AoE-F8-82)" -vn -f s24le > -ar 48000 -c:a pcm_s24be out.raw > ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers > built with gcc 7 (Ubuntu 7.4.0-1ubuntu1~18.04.1) > configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --disable-debug > --enable-nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb > --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb > --enable-libpulse --enable-libfreetype --enable-gnutl > s --enable-libdav1d --enable-libx264 --enable-libx265 --enable-libfdk-aac > --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx > --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr > --enable-libxvid --enable-libvidstab --enable-libtheora --en > able-libwavpack --enable-libopenjpeg --enable-libgsm --enable-nvenc > --enable-libzimg --enable-libaom > libavutil 56. 31.100 / 56. 31.100 > libavcodec 58. 54.100 / 58. 54.100 > libavformat 58. 29.100 / 58. 29.100 > libavdevice 58. 8.100 / 58. 8.100 > libavfilter 7. 57.100 / 7. 57.100 > libswscale 5. 5.100 / 5. 5.100 > libswresample 3. 5.100 / 3. 5.100 > libpostproc 55. 5.100 / 55. 5.100 > Guessed Channel Layout for Input Stream #0.0 : stereo > Input #0, rtsp, from 'rtsp://192.168.2.148:554/by-name/AES67-stream (on > hasseb-AoE-F8-82)': > Metadata: > title : AES67-stream (on hasseb-AoE-F8-82) streamed by > "hasseb" > Duration: N/A, bitrate: 2304 kb/s > Stream #0:0: Audio: pcm_s24be, 48000 Hz, stereo, s32 (24 bit), 2304 kb/s > Stream mapping: > Stream #0:0 -> #0:0 (pcm_s24be (native) -> pcm_s24be (native)) > Press [q] to stop, [?] for help > rtsp://192.168.2.148:554/by-name/AES67-stream (on hasseb-AoE-F8-82): > Connection timed out > Output #0, s24le, to 'out.raw': > Metadata: > title : AES67-stream (on hasseb-AoE-F8-82) streamed by > "hasseb" > encoder : Lavf58.29.100 > Stream #0:0: Audio: pcm_s24be, 48000 Hz, stereo, s32 (24 bit), 2304 kb/s > Metadata: > encoder : Lavc58.54.100 pcm_s24be > size= 0kB time=00:00:00.00 bitrate=N/A speed= 0x > video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB > muxing overhead: unknown > Output file is empty, nothing was encoded (check -ss / -t / -frames > parameters if used) > > The SDP file is : > > v=0 > o=- 254522267104 0 IN IP4 192.168.2.148 > s=AES67-stream (on hasseb-AoE-F8-82) streamed by "hasseb" > t=0 0 > a=clock-domain:PTPv2 0 > a=recvonly > m=audio 5004 RTP/AVP 98 > c=IN IP4 239.123.123.123/255 > a=rtpmap:98 L24/48000/2 > a=sync-time:0 > a=framecount:48 > a=source-filter: incl IN IP4 239.123.123.123 192.168.2.148 > a=ts-refclk:ptp=IEEE1588-2008:00-10-4b-ff-fe-2e-f8-82:domain-nmbr=0 > a=mediaclk:direct=0 > a=ptime:1 > > Comparing those files, we see that ffmpeg detects the correct > audio settings (pcm_s24be, 48000 Hz, stereo, s32 (24 bit)) so I cannot > figure out why it can't read the data stream? I have tried to increase the > timeout but that did not help. > > Any help would be appreciated. Thank you. > > Yannick > _______________________________________________ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
My apologies to everyone for multi-posting this question. My question did not appear in the list after two days so I tried multiple times, thinking it had been considered as spam or something. Then I noticed the question appeared three times in the ffmpeg-user archives, sorry. (Strange thing though : "Receive your own posts to the list?" is set to "Yes" in my subscription settings and I do not receive them). Cheers _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
