FFMPEG-流媒体在几秒钟后停止
FFMPEG- Streaming Stops after few seconds
亲爱的社区大家好
这是我最近几天一直在处理的事情。在 ffmpeg 社区中彻底搜索后，我无法找到解决方案。我无法将本地 flv 流式传输到 facebook rtmp 服务器。
我正在运行以下命令将我的本地 flv 视频流式传输到 Facebook 的 rtmp 服务器以实时流式传输我的本地文件。
```ffmpeg -re -i SampleM.flv -acodec libmp3lame -ar 44100 -b:a 128k -pix_fmt yuv420p -profile:v baseline -s 426x240 -bufsize 6000k -vb 400k -maxrate 1500k -deinterlace -vcodec libx264 -preset veryfast -g 30 -r 30 -f flv "rtmp://live-api.facebook.com:80/rtmp/my_key"```
不幸的是，即使阅读了 ffmpeg 文档，我也无法找到导致我出现这种情况的问题，如下所示。
I am still missing something that i need to know.
以下是执行上述命令的日志。
```ffmpeg version N-91024-g293a6e8332 Copyright (c) 2000-2018 the FFmpeg developers
built with gcc 7.3.0 (GCC)
configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-bzlib --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --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
libavutil 56. 18.100 / 56. 18.100
libavcodec 58. 19.101 / 58. 19.101
libavformat 58. 13.102 / 58. 13.102
libavdevice 58. 4.100 / 58. 4.100
libavfilter 7. 21.100 / 7. 21.100
libswscale 5. 2.100 / 5. 2.100
libswresample 3. 2.100 / 3. 2.100
libpostproc 55. 2.100 / 55. 2.100
Input #0, flv, from '.\video.flv':
Metadata:
audiodelay : 0
canSeekToEnd : 1
creationdate : Fri Feb 03 11:52:46 2006
:
Duration: 00:00:16.92, start: 0.000000, bitrate: 316 kb/s
Stream #0:0: Audio: mp3, 22050 Hz, stereo, fltp, 40 kb/s
Stream #0:1: Video: vp6f, 1 reference frame, yuv420p, 360x288 (368x288), 266 kb/s, 25 fps, 25 tbr, 1k tbn
Stream mapping:
Stream #0:1 -> #0:0 (vp6f (native) -> h264 (libx264))
Stream #0:0 -> #0:1 (mp3 (mp3float) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
[graph_1_in_0_0 @ 0000020c0bcc4200] tb:1/22050 samplefmt:fltp samplerate:22050 chlayout:0x3
[format_out_0_1 @ 0000020c0bca2cc0] auto-inserting filter 'auto_resampler_0' between the filter 'Parsed_anull_0' and the filter 'format_out_0_1'
[auto_resampler_0 @ 0000020c0bca5140] ch:2 chl:stereo fmt:fltp r:22050Hz -> ch:2 chl:stereo fmt:fltp r:44100Hz
[graph 0 input from stream 0:1 @ 0000020c0c4f4600] w:360 h:288 pixfmt:yuv420p tb:1/1000 fr:25/1 sar:0/1 sws_param:flags=2
[scaler_out_0_0 @ 0000020c0c4f73c0] w:426 h:240 flags:'bicubic' interl:0
[scaler_out_0_0 @ 0000020c0c4f73c0] w:360 h:288 fmt:yuv420p sar:0/1 -> w:426 h:240 fmt:yuv420p sar:0/1 flags:0x4
[libx264 @ 0000020c0bc80600] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0000020c0bc80600] profile Constrained Baseline, level 3.0
[libx264 @ 0000020c0bc80600] 264 - core 155 r2901 7d0ff22 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=2 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=7 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=30 keyint_min=3 scenecut=40 intra_refresh=0 rc_lookahead=10 rc=abr mbtree=1 bitrate=400 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=1500 vbv_bufsize=6000 nal_hrd=none filler=0 ip_ratio=1.40 aq=1:1.00
Output #0, flv, to 'rtmp://live-api.facebook.com:80/rtmp/my key:
Metadata:
audiodelay : 0
canSeekToEnd : 1
creationdate : Fri Feb 03 11:52:46 2006
:
encoder : Lavf58.13.102
Stream #0:0: Video: h264 (libx264), 1 reference frame ([7][0][0][0] / 0x0007), yuv420p, 426x240, q=-1--1, 400 kb/s, 30 fps, 1k tbn, 30 tbc
Metadata:
encoder : Lavc58.19.101 libx264
Side data:
cpb: bitrate max/min/avg: 1500000/0/400000 buffer size: 6000000 vbv_delay: -1
Stream #0:1: Audio: mp3 (libmp3lame) ([2][0][0][0] / 0x0002), 44100 Hz, stereo, fltp, delay 1105, 128 kb/s
Metadata:
encoder : Lavc58.19.101 libmp3lame
No more output streams to write to, finishing.e=00:00:16.51 bitrate= 533.3kbits/s speed=0.992x
[flv @ 0000020c0bc97fc0] Failed to update header with correct duration.
[flv @ 0000020c0bc97fc0] Failed to update header with correct filesize.
frame= 424 fps= 25 q=-1.0 Lsize= 1153kB time=00:00:16.95 bitrate= 557.1kbits/s speed=0.997x
video:869kB audio:265kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.666647%
Input file #0 (.\video.flv):
Input stream #0:0 (audio): 649 packets read (84767 bytes); 649 frames decoded (373824 samples);
Input stream #0:1 (video): 424 packets read (566376 bytes); 424 frames decoded;
Total: 1073 packets (651143 bytes) demuxed
Output file #0 (rtmp://live-api.facebook.com:80/rtmp/my key):
Output stream #0:0 (video): 424 frames encoded; 424 packets muxed (889641 bytes);
Output stream #0:1 (audio): 649 frames encoded (747648 samples); 650 packets muxed (271673 bytes);
Total: 1074 packets (1161314 bytes) muxed
[libx264 @ 0000020c0bc80600] frame I:18 Avg QP:27.75 size: 7001
[libx264 @ 0000020c0bc80600] frame P:406 Avg QP:32.67 size: 1879
[libx264 @ 0000020c0bc80600] mb I I16..4: 39.3% 0.0% 60.7%
[libx264 @ 0000020c0bc80600] mb P I16..4: 8.3% 0.0% 2.3% P16..4: 42.2% 16.2% 4.4% 0.0% 0.0% skip:26.6%
[libx264 @ 0000020c0bc80600] final ratefactor: 28.61
[libx264 @ 0000020c0bc80600] coded y,uvDC,uvAC intra: 40.2% 33.7% 9.2% inter: 23.8% 7.5% 0.2%
[libx264 @ 0000020c0bc80600] i16 v,h,dc,p: 24% 50% 20% 6%
[libx264 @ 0000020c0bc80600] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 13% 34% 18% 5% 5% 4% 8% 4% 8%
[libx264 @ 0000020c0bc80600] i8c dc,h,v,p: 67% 24% 7% 2%
[libx264 @ 0000020c0bc80600] kb/s:418.33```
This Image shows that The stream was alive few Few Seconds on Facebook
```[flv @ 0000020c0bc97fc0] Failed to update header with correct duration.
[flv @ 0000020c0bc97fc0] Failed to update header with correct filesize.```
请指正，日志中列出的上述错误似乎是视频在几秒后停止播放的主要原因。我已经检查了延迟问题，但无论如何它们都无济于事。
请帮我解决这个问题。我将非常感激。 :')
Streaming ends even earlier, when I use Google compute engine, instead my own PC as streaming service.
在混合 flv 文件结束时，FFmpeg 使用持续时间和文件大小值更新 header（在文件前面）。但是，当你在流式传输时，ffmpeg 无法搜索到前面，所以显示警告。
您可以通过添加标志 (-flvflags no_duration_filesize) 来禁用此功能，例如：
ffmpeg -re -i SampleM.flv -acodec libmp3lame -ar 44100 -b:a 128k \
-pix_fmt yuv420p -profile:v baseline -s 426x240 -bufsize 6000k \
-vb 400k -maxrate 1500k -deinterlace -vcodec libx264 \
-preset veryfast -g 30 -r 30 -f flv \
-flvflags no_duration_filesize \
"rtmp://live-api.facebook.com:80/rtmp/my_key"
亲爱的社区大家好
这是我最近几天一直在处理的事情。在 ffmpeg 社区中彻底搜索后，我无法找到解决方案。我无法将本地 flv 流式传输到 facebook rtmp 服务器。
我正在运行以下命令将我的本地 flv 视频流式传输到 Facebook 的 rtmp 服务器以实时流式传输我的本地文件。
```ffmpeg -re -i SampleM.flv -acodec libmp3lame -ar 44100 -b:a 128k -pix_fmt yuv420p -profile:v baseline -s 426x240 -bufsize 6000k -vb 400k -maxrate 1500k -deinterlace -vcodec libx264 -preset veryfast -g 30 -r 30 -f flv "rtmp://live-api.facebook.com:80/rtmp/my_key"```
不幸的是，即使阅读了 ffmpeg 文档，我也无法找到导致我出现这种情况的问题，如下所示。
I am still missing something that i need to know.
以下是执行上述命令的日志。
```ffmpeg version N-91024-g293a6e8332 Copyright (c) 2000-2018 the FFmpeg developers
built with gcc 7.3.0 (GCC)
configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-bzlib --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --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
libavutil 56. 18.100 / 56. 18.100
libavcodec 58. 19.101 / 58. 19.101
libavformat 58. 13.102 / 58. 13.102
libavdevice 58. 4.100 / 58. 4.100
libavfilter 7. 21.100 / 7. 21.100
libswscale 5. 2.100 / 5. 2.100
libswresample 3. 2.100 / 3. 2.100
libpostproc 55. 2.100 / 55. 2.100
Input #0, flv, from '.\video.flv':
Metadata:
audiodelay : 0
canSeekToEnd : 1
creationdate : Fri Feb 03 11:52:46 2006
:
Duration: 00:00:16.92, start: 0.000000, bitrate: 316 kb/s
Stream #0:0: Audio: mp3, 22050 Hz, stereo, fltp, 40 kb/s
Stream #0:1: Video: vp6f, 1 reference frame, yuv420p, 360x288 (368x288), 266 kb/s, 25 fps, 25 tbr, 1k tbn
Stream mapping:
Stream #0:1 -> #0:0 (vp6f (native) -> h264 (libx264))
Stream #0:0 -> #0:1 (mp3 (mp3float) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
[graph_1_in_0_0 @ 0000020c0bcc4200] tb:1/22050 samplefmt:fltp samplerate:22050 chlayout:0x3
[format_out_0_1 @ 0000020c0bca2cc0] auto-inserting filter 'auto_resampler_0' between the filter 'Parsed_anull_0' and the filter 'format_out_0_1'
[auto_resampler_0 @ 0000020c0bca5140] ch:2 chl:stereo fmt:fltp r:22050Hz -> ch:2 chl:stereo fmt:fltp r:44100Hz
[graph 0 input from stream 0:1 @ 0000020c0c4f4600] w:360 h:288 pixfmt:yuv420p tb:1/1000 fr:25/1 sar:0/1 sws_param:flags=2
[scaler_out_0_0 @ 0000020c0c4f73c0] w:426 h:240 flags:'bicubic' interl:0
[scaler_out_0_0 @ 0000020c0c4f73c0] w:360 h:288 fmt:yuv420p sar:0/1 -> w:426 h:240 fmt:yuv420p sar:0/1 flags:0x4
[libx264 @ 0000020c0bc80600] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0000020c0bc80600] profile Constrained Baseline, level 3.0
[libx264 @ 0000020c0bc80600] 264 - core 155 r2901 7d0ff22 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=2 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=7 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=30 keyint_min=3 scenecut=40 intra_refresh=0 rc_lookahead=10 rc=abr mbtree=1 bitrate=400 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=1500 vbv_bufsize=6000 nal_hrd=none filler=0 ip_ratio=1.40 aq=1:1.00
Output #0, flv, to 'rtmp://live-api.facebook.com:80/rtmp/my key:
Metadata:
audiodelay : 0
canSeekToEnd : 1
creationdate : Fri Feb 03 11:52:46 2006
:
encoder : Lavf58.13.102
Stream #0:0: Video: h264 (libx264), 1 reference frame ([7][0][0][0] / 0x0007), yuv420p, 426x240, q=-1--1, 400 kb/s, 30 fps, 1k tbn, 30 tbc
Metadata:
encoder : Lavc58.19.101 libx264
Side data:
cpb: bitrate max/min/avg: 1500000/0/400000 buffer size: 6000000 vbv_delay: -1
Stream #0:1: Audio: mp3 (libmp3lame) ([2][0][0][0] / 0x0002), 44100 Hz, stereo, fltp, delay 1105, 128 kb/s
Metadata:
encoder : Lavc58.19.101 libmp3lame
No more output streams to write to, finishing.e=00:00:16.51 bitrate= 533.3kbits/s speed=0.992x
[flv @ 0000020c0bc97fc0] Failed to update header with correct duration.
[flv @ 0000020c0bc97fc0] Failed to update header with correct filesize.
frame= 424 fps= 25 q=-1.0 Lsize= 1153kB time=00:00:16.95 bitrate= 557.1kbits/s speed=0.997x
video:869kB audio:265kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.666647%
Input file #0 (.\video.flv):
Input stream #0:0 (audio): 649 packets read (84767 bytes); 649 frames decoded (373824 samples);
Input stream #0:1 (video): 424 packets read (566376 bytes); 424 frames decoded;
Total: 1073 packets (651143 bytes) demuxed
Output file #0 (rtmp://live-api.facebook.com:80/rtmp/my key):
Output stream #0:0 (video): 424 frames encoded; 424 packets muxed (889641 bytes);
Output stream #0:1 (audio): 649 frames encoded (747648 samples); 650 packets muxed (271673 bytes);
Total: 1074 packets (1161314 bytes) muxed
[libx264 @ 0000020c0bc80600] frame I:18 Avg QP:27.75 size: 7001
[libx264 @ 0000020c0bc80600] frame P:406 Avg QP:32.67 size: 1879
[libx264 @ 0000020c0bc80600] mb I I16..4: 39.3% 0.0% 60.7%
[libx264 @ 0000020c0bc80600] mb P I16..4: 8.3% 0.0% 2.3% P16..4: 42.2% 16.2% 4.4% 0.0% 0.0% skip:26.6%
[libx264 @ 0000020c0bc80600] final ratefactor: 28.61
[libx264 @ 0000020c0bc80600] coded y,uvDC,uvAC intra: 40.2% 33.7% 9.2% inter: 23.8% 7.5% 0.2%
[libx264 @ 0000020c0bc80600] i16 v,h,dc,p: 24% 50% 20% 6%
[libx264 @ 0000020c0bc80600] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 13% 34% 18% 5% 5% 4% 8% 4% 8%
[libx264 @ 0000020c0bc80600] i8c dc,h,v,p: 67% 24% 7% 2%
[libx264 @ 0000020c0bc80600] kb/s:418.33```
This Image shows that The stream was alive few Few Seconds on Facebook
```[flv @ 0000020c0bc97fc0] Failed to update header with correct duration.
[flv @ 0000020c0bc97fc0] Failed to update header with correct filesize.```
请指正，日志中列出的上述错误似乎是视频在几秒后停止播放的主要原因。我已经检查了延迟问题，但无论如何它们都无济于事。
请帮我解决这个问题。我将非常感激。 :')
Streaming ends even earlier, when I use Google compute engine, instead my own PC as streaming service.
在混合 flv 文件结束时，FFmpeg 使用持续时间和文件大小值更新 header（在文件前面）。但是，当你在流式传输时，ffmpeg 无法搜索到前面，所以显示警告。
您可以通过添加标志 (-flvflags no_duration_filesize) 来禁用此功能，例如：
ffmpeg -re -i SampleM.flv -acodec libmp3lame -ar 44100 -b:a 128k \
-pix_fmt yuv420p -profile:v baseline -s 426x240 -bufsize 6000k \
-vb 400k -maxrate 1500k -deinterlace -vcodec libx264 \
-preset veryfast -g 30 -r 30 -f flv \
-flvflags no_duration_filesize \
"rtmp://live-api.facebook.com:80/rtmp/my_key"