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ffmpeg 流输入 sdp 显示警告关键帧丢失

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我正在使用 ffmpeg 4.3.2。
我正在尝试将流转发到具有 sdp 文件作为输入的 rtmp 服务器
使用 VLC 打开 sdp 文件一切正常。当我使用 ffplay 时也会发生同样的事情

ffplay -i rtp-forwarder.sdp -protocol_whitelist file,udp,rtp
当我开始流式传输到 rtmp 服务器时,问题就开始了。音频很好,但视频只是黑屏。我尝试流式传输到 youtube rtmp 服务器,但没有成功。
我是ffmpeg的新手。如果我遗漏了什么,请告诉我。
我正在使用这个命令
ffmpeg -protocol_whitelist file,crypto,udp,rtp -re -i rtp-forwarder.sdp -c:v libx264 -b:v 3000k -maxrate 3000k -bufsize 6000k -pix_fmt yuv420p -g 50 -c:a aac -b:a 160k -ac 2 -ar 44100 -f flv rtmp://localhost/live/test
sdp文件内容是这样的
v=0
o=- 0 0 IN IP4 192.168.1.49
s=Pion WebRTC
c=IN IP4 192.168.1.49
t=0 0
m=audio 4000 RTP/AVP 111
a=rtpmap:111 OPUS/48000/2
m=video 4002 RTP/AVP 96
a=rtpmap:96 VP8/90000
这是完整的日志
  libavutil      56. 51.100 / 56. 51.100
libavcodec 58. 91.100 / 58. 91.100
libavformat 58. 45.100 / 58. 45.100
libavdevice 58. 10.100 / 58. 10.100
libavfilter 7. 85.100 / 7. 85.100
libswscale 5. 7.100 / 5. 7.100
libswresample 3. 7.100 / 3. 7.100
libpostproc 55. 7.100 / 55. 7.100
[sdp @ 0000015a81ede6c0] Keyframe missing
Input #0, sdp, from 'rtp-forwarder.sdp':
Metadata:
title : Pion WebRTC
Duration: N/A, start: 0.000000, bitrate: N/A
Stream #0:0: Audio: opus, 48000 Hz, stereo, fltp
Stream #0:1: Video: vp8, yuv420p(tv, bt470bg/unknown/unknown), 640x480, 90k tbr, 90k tbn, 90k tbc
Stream mapping:
Stream #0:1 -> #0:0 (vp8 (native) -> h264 (libx264))
Stream #0:0 -> #0:1 (opus (native) -> aac (native))
Press [q] to stop, [?] for help
[libx264 @ 0000015a81f9e880] MB rate (108000000) > level limit (16711680) -0.0kbits/s speed=N/A
[libx264 @ 0000015a81f9e880] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0000015a81f9e880] profile High, level 6.2, 4:2:0, 8-bit
[libx264 @ 0000015a81f9e880] 264 - core 161 r3048 b86ae3c - H.264/MPEG-4 AVC codec - Copyleft 2003-2021 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=50 keyint_min=5 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=cbr mbtree=1 bitrate=3000 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=3000 vbv_bufsize=6000 nal_hrd=none filler=0 ip_ratio=1.40 aq=1:1.00
Output #0, flv, to 'rtmp://localhost/live/test':
Metadata:
title : Pion WebRTC
encoder : Lavf58.45.100
Stream #0:0: Video: h264 (libx264) ([7][0][0][0] / 0x0007), yuv420p, 640x480, q=-1--1, 3000 kb/s, 90k fps, 1k tbn, 90k tbc
Metadata:
encoder : Lavc58.91.100 libx264
Side data:
cpb: bitrate max/min/avg: 3000000/0/3000000 buffer size: 6000000 vbv_delay: N/A
Stream #0:1: Audio: aac (LC) ([10][0][0][0] / 0x000A), 44100 Hz, stereo, fltp, 160 kb/s
Metadata:
encoder : Lavc58.91.100 aac
[flv @ 0000015a820dd200] Failed to update header with correct duration..1kbits/s speed= 1x
[flv @ 0000015a820dd200] Failed to update header with correct filesize.
frame= 13 fps=0.1 q=-1.0 Lsize= 4233kB time=00:03:07.12 bitrate= 185.3kbits/s speed=0.999x
video:440kB audio:3658kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 3.281771%
[libx264 @ 0000015a81f9e880] frame I:1 Avg QP: 1.61 size: 59263
[libx264 @ 0000015a81f9e880] frame P:3 Avg QP: 9.10 size: 44500
[libx264 @ 0000015a81f9e880] frame B:9 Avg QP: 9.80 size: 28605
[libx264 @ 0000015a81f9e880] consecutive B-frames: 7.7% 0.0% 0.0% 92.3%
[libx264 @ 0000015a81f9e880] mb I I16..4: 36.5% 19.5% 44.0%
[libx264 @ 0000015a81f9e880] mb P I16..4: 10.7% 50.3% 12.3% P16..4: 11.6% 9.6% 5.5% 0.0% 0.0% skip: 0.1%
[libx264 @ 0000015a81f9e880] mb B I16..4: 2.2% 10.4% 3.6% B16..8: 45.7% 21.2% 6.1% direct:10.6% skip: 0.1% L0:60.0% L1:25.5% BI:14.5%
[libx264 @ 0000015a81f9e880] final ratefactor: 13.03
[libx264 @ 0000015a81f9e880] 8x8 transform intra:56.7% inter:41.9%
[libx264 @ 0000015a81f9e880] coded y,uvDC,uvAC intra: 90.9% 99.6% 98.9% inter: 66.1% 99.0% 93.2%
[libx264 @ 0000015a81f9e880] i16 v,h,dc,p: 23% 22% 18% 38%
[libx264 @ 0000015a81f9e880] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 31% 26% 23% 4% 2% 3% 3% 4% 4%
[libx264 @ 0000015a81f9e880] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 36% 34% 18% 2% 2% 2% 2% 2% 2%
[libx264 @ 0000015a81f9e880] i8c dc,h,v,p: 55% 29% 11% 5%
[libx264 @ 0000015a81f9e880] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 0000015a81f9e880] ref P L0: 59.2% 5.0% 13.4% 22.4%
[libx264 @ 0000015a81f9e880] ref B L0: 87.1% 7.5% 5.4%
[libx264 @ 0000015a81f9e880] ref B L1: 95.1% 4.9%
[libx264 @ 0000015a81f9e880] kb/s:4028.74
[aac @ 0000015a81f9a880] Qavg: 7535.380
我收到此警告 [sdp @ 0000015a81ede6c0] Keyframe missing这一个停了下来
[flv @ 0000015a820dd200] Failed to update header with correct duration..1kbits/s speed=   1x
[flv @ 0000015a820dd200] Failed to update header with correct filesize.

最佳答案

你用的是未修改的rtp-forwarder Pion 的例子?如果您复制/修改了它,请确保您仍在请求关键帧。
调试明智的你可以尝试做-f out.flv看看里面有什么?如果可能的话,我会分享它(和你的代码),我想我可以弄清楚。

关于ffmpeg 流输入 sdp 显示警告关键帧丢失,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/66726442/

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