Opened 4 years ago
Last modified 4 years ago
#8616 new defect
Distorted audio in RTMP stream
Reported by: | ert55 | Owned by: | |
---|---|---|---|
Priority: | normal | Component: | undetermined |
Version: | unspecified | Keywords: | |
Cc: | Blocked By: | ||
Blocking: | Reproduced by developer: | no | |
Analyzed by developer: | no |
Description
I'm trying to push an IP camera RTSP stream to youtube like so:
% ffmpeg -rtsp_transport tcp -i "rtsp://**********************" -codec copy -f flv rtmp://x.rtmp.youtube.com/live2/**************** ffmpeg version N-94664-g0821bc4eee Copyright (c) 2000-2019 the FFmpeg developers built with gcc 9.1.1 (GCC) 20190807 configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt libavutil 56. 33.100 / 56. 33.100 libavcodec 58. 55.101 / 58. 55.101 libavformat 58. 31.104 / 58. 31.104 libavdevice 58. 9.100 / 58. 9.100 libavfilter 7. 58.101 / 7. 58.101 libswscale 5. 6.100 / 5. 6.100 libswresample 3. 6.100 / 3. 6.100 libpostproc 55. 6.100 / 55. 6.100 Input #0, rtsp, from 'rtsp://xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx': Metadata: title : Media Server Duration: N/A, start: 0.040000, bitrate: N/A Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 1280x720, 12 fps, 25 tbr, 90k tbn, 24 tbc Stream #0:1: Audio: aac (LC), 32000 Hz, mono, fltp Output #0, flv, to 'rtmp://x.rtmp.youtube.com/live2/xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx': Metadata: title : Media Server encoder : Lavf58.31.104 Stream #0:0: Video: h264 (Main) ([7][0][0][0] / 0x0007), yuvj420p(pc, bt709, progressive), 1280x720, q=2-31, 12 fps, 25 tbr, 1k tbn, 90k tbc Stream #0:1: Audio: aac (LC) ([10][0][0][0] / 0x000A), 32000 Hz, mono, fltp Stream mapping: Stream #0:0 -> #0:0 (copy) Stream #0:1 -> #0:1 (copy) Press [q] to stop, [?] for help [flv @ 000000000310d540] Non-monotonous DTS in output stream 0:0; previous: 557, current: 120; changing to 557. This may result in incorrect timestamps in the output file. [flv @ 000000000310d540] Non-monotonous DTS in output stream 0:0; previous: 557, current: 200; changing to 557. This may result in incorrect timestamps in the output file. [flv @ 000000000310d540] Non-monotonous DTS in output stream 0:0; previous: 557, current: 320; changing to 557. This may result in incorrect timestamps in the output file. [flv @ 000000000310d540] Non-monotonous DTS in output stream 0:0; previous: 557, current: 400; changing to 557. This may result in incorrect timestamps in the output file. [flv @ 000000000310d540] Non-monotonous DTS in output stream 0:0; previous: 557, current: 480; changing to 557. This may result in incorrect timestamps in the output file. frame= 7 fps=0.0 q=-1.0 size= 74kB time=00:00:00.56 bitrate=1079.1kbits/s speed=1.06x frame= 25 fps= 19 q=-1.0 size= 188kB time=00:00:02.08 bitrate= 741.5kbits/s speed=1.61x frame= 49 fps= 22 q=-1.0 size= 330kB time=00:00:04.08 bitrate= 661.9kbits/s speed=1.83x frame= 67 fps= 25 q=-1.0 size= 392kB time=00:00:05.66 bitrate= 567.3kbits/s speed=2.07x frame= 72 fps= 22 q=-1.0 size= 410kB time=00:00:06.06 bitrate= 553.9kbits/s speed=1.84x frame= 76 fps= 20 q=-1.0 size= 488kB time=00:00:06.38 bitrate= 626.5kbits/s speed=1.67x frame= 86 fps= 20 q=-1.0 size= 519kB time=00:00:07.26 bitrate= 585.5kbits/s speed=1.68x frame= 92 fps= 19 q=-1.0 size= 538kB time=00:00:07.74 bitrate= 569.5kbits/s speed= 1.6x frame= 97 fps= 17 q=-1.0 size= 618kB time=00:00:08.11 bitrate= 623.8kbits/s speed=1.45x frame= 108 fps= 18 q=-1.0 size= 658kB time=00:00:09.02 bitrate= 597.6kbits/s speed=1.48x frame= 114 fps= 17 q=-1.0 size= 679kB time=00:00:09.50 bitrate= 585.3kbits/s speed=1.44x frame= 120 fps= 17 q=-1.0 size= 698kB time=00:00:10.02 bitrate= 570.5kbits/s speed=1.41x frame= 121 fps= 16 q=-1.0 size= 764kB time=00:00:10.09 bitrate= 619.8kbits/s speed=1.32x frame= 132 fps= 16 q=-1.0 size= 802kB time=00:00:11.01 bitrate= 596.7kbits/s speed=1.35x frame= 138 fps= 16 q=-1.0 size= 820kB time=00:00:11.57 bitrate= 580.6kbits/s speed=1.34x frame= 144 fps= 16 q=-1.0 size= 841kB time=00:00:12.05 bitrate= 571.5kbits/s speed=1.32x frame= 149 fps= 15 q=-1.0 size= 923kB time=00:00:12.45 bitrate= 606.8kbits/s speed=1.29x frame= 157 fps= 15 q=-1.0 size= 949kB time=00:00:13.13 bitrate= 592.0kbits/s speed=1.28x frame= 163 fps= 15 q=-1.0 size= 969kB time=00:00:13.65 bitrate= 581.3kbits/s speed=1.27x frame= 169 fps= 15 q=-1.0 size= 1051kB time=00:00:14.09 bitrate= 610.9kbits/s speed=1.22x frame= 180 fps= 15 q=-1.0 size= 1091kB time=00:00:15.05 bitrate= 593.6kbits/s speed=1.24x frame= 187 fps= 15 q=-1.0 size= 1113kB time=00:00:15.61 bitrate= 583.8kbits/s speed=1.23x frame= 192 fps= 15 q=-1.0 size= 1130kB time=00:00:16.05 bitrate= 576.7kbits/s speed=1.21x frame= 197 fps= 14 q=-1.0 size= 1212kB time=00:00:16.45 bitrate= 603.2kbits/s speed= 1.2x frame= 206 fps= 14 q=-1.0 size= 1241kB time=00:00:17.17 bitrate= 592.1kbits/s speed= 1.2x frame= 213 fps= 14 q=-1.0 size= 1265kB time=00:00:17.77 bitrate= 582.8kbits/s speed= 1.2x frame= 217 fps= 14 q=-1.0 size= 1340kB time=00:00:18.09 bitrate= 606.6kbits/s speed=1.16x frame= 228 fps= 14 q=-1.0 size= 1380kB time=00:00:19.05 bitrate= 593.4kbits/s speed=1.18x frame= 234 fps= 14 q=-1.0 size= 1399kB time=00:00:19.57 bitrate= 585.6kbits/s speed=1.17x frame= 240 fps= 14 q=-1.0 size= 1418kB time=00:00:20.05 bitrate= 579.4kbits/s speed=1.16x [flv @ 000000000310d540] Failed to update header with correct duration. [flv @ 000000000310d540] Failed to update header with correct filesize. frame= 241 fps= 14 q=-1.0 Lsize= 1486kB time=00:00:20.05 bitrate= 606.8kbits/s speed=1.14x video:1317kB audio:153kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.058846% Exiting normally, received signal 2.
The problem is the audio being distorted on youtube's end. I've recorded the audio and looked at the waveform. Gaps and audible parts are 7ms and 32ms long each respectively as shown below:
I've tried many parameters both for the input as well as the output, including transcoding the audio, all to no avail. What's strange is that when I output the stream to a file the audio is fine.
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Is the issue only reproducible with network input or also with file input?
Is the issue only reproducible with network output or did you also try to reproduce with file output?