[FFmpeg-user] rtmp output is black, bitrate= N/A

[DopeLabs]

from https://trac.ffmpeg.org/wiki/Creating%20multiple%20outputs <https://trac.ffmpeg.org/wiki/Creating%20multiple%20outputs>

Tee pseudo-muxer <https://trac.ffmpeg.org/wiki/Creating%20multiple%20outputs#Teepseudo-muxer>
The tee pseudo-muxer <https://ffmpeg.org/ffmpeg-formats.html#tee> was added to ffmpeg on 2013-02-03, and allows you to duplicate the output to multiple files with a single instance of ffmpeg.

ffmpeg -i input.file -c:v libx264 -c:a mp2 \
-f tee -map 0:v -map 0:a "output.mkv|[f=mpegts]udp://10.0.1.255:1234/"

so in your case the command should be something like this (untested):


$ ffmpeg -y -deinterlace -f dv -i - -s 320x240 -r 10 -b:v 1000k -c:v libx264 -pix_fmt yuv420p -preset veryfast -crf 25 -maxrate 3000k -bufsize 6000k -g 20 -c:a libmp3lame -ac 1 -ab 32k -ar 22050 -f tee -map 0:v -map 0:a “recording.mp4|[f=flv]rtmp://xxx.xxx.xxx.xxx:1935/live/livestream1 <rtmp://xxx.xxx.xxx.xxx:1935/live/livestream1>"



> On Apr 25, 2015, at 12:18 PM, Anthony Griffiths <neuronetv at gmail.com> wrote:
> 
> this post is a continuation of a previous thread (of mine) about
> encoding to multiple targets. I'm trying to create a stream and record
> it too in one command, this is the command I'm using:
> 
> ffmpeg -i [input] blah-de-blah
> '[f=flv]rtmp://xxx.xxx.xxx.xxx:1935/live/livestream1|recording.mp4
> 
> this is the console output:
> 
> ]$ ffmpeg -deinterlace -f dv -i - -f flv -y -vcodec flv -s 320x240 -r
> 10 -b:v 1000k -vcodec libx264 -pix_fmt yuv420p -preset veryfast -crf
> 25 -maxrate 3000k -bufsize 6000k -g 20 -c:a libmp3lame -ac 1 -ab 32k
> -ar 22050 -f tee -map 0:v -map 0:a
> '[f=flv]rtmp://xxx.xxx.xxx.xxx:1935/live/livestream1|recording.mp4'
> ffmpeg version 2.6.2-   http://johnvansickle.com/ffmpeg/    Copyright
> (c) 2000-2015 the FFmpeg developers
>  built with gcc 4.9.2 (Debian 4.9.2-10)
>  configuration: --enable-gpl --enable-version3 --disable-shared
> --disable-debug --enable-runtime-cpudetect --enable-libmp3lame
> --enable-libx264 --enable-libx265 --enable-libwebp --enable-libspeex
> --enable-libvorbis --enable-libvpx --enable-libfreetype
> --enable-fontconfig --enable-libxvid --enable-libopencore-amrnb
> --enable-libopencore-amrwb --enable-libtheora --enable-libvo-aacenc
> --enable-libvo-amrwbenc --enable-gray --enable-libopenjpeg
> --enable-libopus --enable-libass --enable-gnutls --enable-libvidstab
> --enable-libsoxr --cc=gcc-4.9
>  libavutil      54. 20.100 / 54. 20.100
>  libavcodec     56. 26.100 / 56. 26.100
>  libavformat    56. 25.101 / 56. 25.101
>  libavdevice    56.  4.100 / 56.  4.100
>  libavfilter     5. 11.102 /  5. 11.102
>  libswscale      3.  1.101 /  3.  1.101
>  libswresample   1.  1.100 /  1.  1.100
>  libpostproc    53.  3.100 / 53.  3.100
> Found AV/C device with GUID 0x002011011501d694
> Waiting for DV...
> Capture Started
> Input #0, dv, from 'pipe:':
>  Duration: N/A, start: 0.000000, bitrate: 28800 kb/s
>    Stream #0:0: Video: dvvideo, yuv420p, 720x576 [SAR 16:15 DAR 4:3],
> 28800 kb/s, 25 fps, 25 tbr, 25 tbn, 25 tbc
>    Stream #0:1: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
> [libx264 @ 0x2a06580] using SAR=1/1
> [libx264 @ 0x2a06580] using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64
> [libx264 @ 0x2a06580] profile High, level 3.0
> [flv @ 0x2ff43c0] Codec for stream 0 does not use global headers but
> container format requires global headers
> [flv @ 0x2ff43c0] Codec for stream 1 does not use global headers but
> container format requires global headers
> [mp4 @ 0x2ff6fc0] Codec for stream 0 does not use global headers but
> container format requires global headers
> [mp4 @ 0x2ff6fc0] Codec for stream 1 does not use global headers but
> container format requires global headers
> Output #0, tee, to
> '[f=flv]rtmp://xxx.xxx.xxx.xxx:1935/live/livestream1|recording.mp4':
>  Metadata:
>    encoder         : Lavf56.25.101
>    Stream #0:0: Video: h264 (libx264), yuv420p, 320x240 [SAR 1:1 DAR
> 4:3], q=-1--1, 1000 kb/s, 10 fps, 10 tbn, 10 tbc
>    Metadata:
>      encoder         : Lavc56.26.100 libx264
>    Stream #0:1: Audio: mp3 (libmp3lame), 22050 Hz, mono, s16p, 32 kb/s
>    Metadata:
>      encoder         : Lavc56.26.100 libmp3lame
> Stream mapping:
>  Stream #0:0 -> #0:0 (dvvideo (native) -> h264 (libx264))
>  Stream #0:1 -> #0:1 (pcm_s16le (native) -> mp3 (libmp3lame))
> frame=   87 fps= 12 q=27.0 size=N/A time=00:00:08.43 bitrate=N/A dup=0 drop=126
> 
> this command actually runs but the rtmp output is black, and I notice
> that bitrate=N/A. The resultant recording.mp4 does have an image but
> not the rtmp stream. I've been trawling google on this but can't work
> out why this is. if I trim the command down and leave out the dual
> target and just stream to rtmp only it works fine, I get an image. Can
> anybody help? I've been on this problem for days and now I'm close to
> solving if I can just get the rtmp image back on. Thanks for any
> further help.
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