FFmpeg: Unable to find a suitable output format for 'mpegts' - ffmpeg

I am using the following command on several video streams to pipe them into my TVHeadend server.
pipe:///usr/bin/ffmpeg -i *URL* -c copy -metadata service_provider="My Provider" -metadata service_name="My Service"-f mpegts pipe:1
This command works fine for most of the streams, but a few are throwing this error...
ffmpeg version 4.3.1 Copyright (c) 2000-2020 the FFmpeg developers
built with gcc 9.3.0 (Alpine 9.3.0)
configuration: --prefix=/usr --enable-avresample --enable-avfilter --enable-gnutls --enable-gpl --enable-libass --enable-libmp3lame --enable-libvorbis --enable-libvpx --enable-libxvid --enable-libx264 --enable-libx265 --enable-libtheora --enable-libv4l2 --enable-libdav1d --enable-postproc --enable-pic --enable-pthreads --enable-shared --enable-libxcb --enable-libssh --disable-stripping --disable-static --disable-librtmp --enable-vaapi --enable-vdpau --enable-libopus --enable-libaom --disable-debug
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
libavresample 4. 0. 0 / 4. 0. 0
libswscale 5. 7.100 / 5. 7.100
libswresample 3. 7.100 / 3. 7.100
libpostproc 55. 7.100 / 55. 7.100
[hls # 0x7f7c03b0c5c0] Skip ('#EXT-X-VERSION:3')
[hls # 0x7f7c03b0c5c0] Opening '****' for reading
[hls # 0x7f7c03b0c5c0] Opening '****' for reading
Input #0, hls, from '****:
Duration: N/A, start: 3116.333433, bitrate: N/A
Program 0
Metadata:
variant_bitrate : 0
Stream #0:0: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 90k tbn, 50 tbc
Metadata:
variant_bitrate : 0
Stream #0:1: Audio: aac (LC) ([15][0][0][0] / 0x000F), 44100 Hz, stereo, fltp
Metadata:
variant_bitrate : 0
[NULL # 0x55f1a0fcec80] Unable to find a suitable output format for 'mpegts'
mpegts: Invalid argument
The problem streams do work.
I searched before asking this question and everything I found was related to conversion.
Can anyone see what I am doing wrong?
The reason behind the using FFmpeg and piping is to eliminate issues with stream freezes. FFmpeg just handles hitches etc better than simply adding the URL straight into my TVHeadend server.


Change from
-metadata service_name="My Service"-f mpegts pipe:1
to
-metadata service_name="My Service" -f mpegts pipe:1

Related

How can I extract bonus images from a tv show DVD using ffmpeg?

I'm using MakeMKVcon to automate episodes extraction. It do the job, expect the metadata. I have to rename files manually. But the problem here is that I want to extract some bonus pictures slideshow from the ISO but no software can detect it. I can only display those images using VLC (using the ISO file).
Do you have any idea how to do that ?
Here's the ffmpeg -i output:
$ ffmpeg -i /path/to/iso/file.ISO
ffmpeg version git-2020-03-24-7239254 Copyright (c) 2000-2020 the FFmpeg developers
built with Apple clang version 11.0.0 (clang-1100.0.33.16)
configuration: --prefix=/usr/local/Cellar/ffmpeg/HEAD-7239254_1 --enable-shared --cc=clang --host-cflags=-fno-stack-check --host-ldflags= --enable-gpl --enable-libaom --enable-libmp3lame --enable-libopus --enable-libsnappy --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --disable-libjack --disable-indev=jack --enable-opencl --enable-videotoolbox --disable-htmlpages --enable-libfdk-aac --enable-nonfree
libavutil 56. 42.101 / 56. 42.101
libavcodec 58. 76.100 / 58. 76.100
libavformat 58. 42.100 / 58. 42.100
libavdevice 58. 9.103 / 58. 9.103
libavfilter 7. 77.100 / 7. 77.100
libswscale 5. 6.101 / 5. 6.101
libswresample 3. 6.100 / 3. 6.100
libpostproc 55. 6.100 / 55. 6.100
[mpeg # 0x7f8111808200] Packet corrupt (stream = 4, dts = 2097152).
[mpeg # 0x7f8111808200] stream 4 : no TS found at start of file, duration not set
[mpeg # 0x7f8111808200] Could not find codec parameters for stream 4 (Audio: mp2, 0 channels): unspecified frame size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, mpeg, from '/path/to/iso/file.ISO':
Duration: 00:24:21.47, start: 0.280000, bitrate: 40817 kb/s
Stream #0:0[0x1bf]: Data: dvd_nav_packet
Stream #0:1[0x1e0]: Video: mpeg2video (Main), yuv420p(tv, bt470bg, progressive), 720x576 [SAR 16:15 DAR 4:3], 25 fps, 25 tbr, 90k tbn, 50 tbc
Side data:
cpb: bitrate max/min/avg: 8000000/0/0 buffer size: 1835008 vbv_delay: N/A
Stream #0:2[0x20]: Subtitle: dvd_subtitle
Stream #0:3[0x80]: Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s
Stream #0:4[0x1d7]: Audio: mp2, 0 channels
At least one output file must be specified

FFMPEG shows bitrate=N/A and doesn't send anything

I am trying to relay an stream from one rtsp url to another without recoding using this command:
ffmpeg
-rtsp_transport tcp
-fflags nobuffer
-re
-i rtsp://xxx.xxx.xxx.xxx:554/[stream_name]
-vcodec copy
-an
-f rtsp rtsp://yyy.yyy.yyy.yyy/[new_stream_name]
But FFMPEG doesn't stream anything and stats shows bitrate=N/A
This is the exact output that i get:
ffmpeg version 4.1.3-static https://johnvansickle.com/ffmpeg/ Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc-6 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp --enable-gray --enable-libfribidi --enable-libass --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libxml2 --enable-libxvid --enable-libzimg
libavutil 56. 22.100 / 56. 22.100
libavcodec 58. 35.100 / 58. 35.100
libavformat 58. 20.100 / 58. 20.100
libavdevice 58. 5.100 / 58. 5.100
libavfilter 7. 40.101 / 7. 40.101
libswscale 5. 3.100 / 5. 3.100
libswresample 3. 3.100 / 3. 3.100
libpostproc 55. 3.100 / 55. 3.100
Input #0, rtsp, from
'rtsp://xxx.xxx.xxx.xxx:554/[stream_name]':
Metadata:
title : RTSP Session
Duration: N/A, start: 0.318111, bitrate: N/A
Stream #0:0: Video: h264 (High), yuv420p(progressive), 944x1080, 22 fps, 22 tbr, 90k tbn, 180k tbc
Output #0, rtsp, to
'rtsp://yyy.yyy.yyy.yyy/[new_stream_name]':
Metadata:
title : RTSP Session
encoder : Lavf58.20.100
Stream #0:0: Video: h264 (High), yuv420p(progressive), 944x1080, q=2-31, 22 fps, 22 tbr, 90k tbn, 90k tbc
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
frame= 113 fps= 32 q=-1.0 Lsize=N/A time=00:00:06.77 bitrate=N/A speed=1.92x
Although when i change output stream container to 'flv' and protocol to 'rtmp' it works.
Any help will be appreciated.

To have stream accessible you need to publish it to a streaming server that supports RTSP input (like Wowza SE) and that usually also involves publishing credentials like:
rtsp://user:password#yyy.yyy.yyy.yyy/[new_stream_name]
You can test re-streaming with this tool https://videonow.live/broadcast-ip-camera-or-stream/ that can also publish it in a HTML5 accessible format like HLS.

How to generate m3u8 file and list of TS segment files using ffmpeg for wmv and avi video files

I am able to generate m3u8 and list of segment(.ts) files from mp4 video file using following ffmpeg command
ffmpeg -i Bee_Free.mp4 -codec copy -vbsf h264_mp4toannexb -map 0 -f segment -segment_list free.m3u8 -segment_time 10 free%03d.ts
I am using the same command to generate m3u8 and ts files from .wmv and .avi files
command for .avi file
ffmpeg -i PalivalaBadraVatakam.avi -codec copy -vbsf h264_mp4toannexb -map 0 -f segment -segment_list palivaala.m3u8 -segment_time 10 palivaala%03d.ts
Error
ffmpeg version N-89041-g91a565e20f Copyright (c) 2000-2017 the FFmpeg developers
built with gcc 7.2.0 (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-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-cuda --enable-cuvid --enable-d3d11va --enable-nvenc --enable-dxva2 --enable-avisynth --enable-libmfx
libavutil 56. 0.100 / 56. 0.100
libavcodec 58. 3.101 / 58. 3.101
libavformat 58. 2.100 / 58. 2.100
libavdevice 58. 0.100 / 58. 0.100
libavfilter 7. 0.101 / 7. 0.101
libswscale 5. 0.101 / 5. 0.101
libswresample 3. 0.101 / 3. 0.101
libpostproc 55. 0.100 / 55. 0.100
Guessed Channel Layout for Input Stream #0.1 : stereo
Input #0, avi, from 'PalivalaBadraVatakam.avi':
Metadata:
date : 2018-04-24T17:08:40+05:30
encoder : Adobe Premiere Pro CC 2018.1 (Windows)
Duration: 00:00:53.19, start: 0.000000, bitrate: 30317 kb/s
Stream #0:0: Video: dvvideo (dvsd / 0x64737664), yuv411p, 720x480 [SAR 8:9 DAR 4:3], 28789 kb/s, 29.97 fps, 29.97 tbr, 29.97 tbn, 29.97 tbc
Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, stereo, s16, 1536 kb/s
[AVBSFContext # 000001e976f84080] Codec 'dvvideo' (24) is not supported by the bitstream filter 'h264_mp4toannexb'. Supported codecs are: h264 (27)
Error initializing bitstream filter: h264_mp4toannexb
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #0:1 -> #0:1 (copy)
Last message repeated 1 times
Command for .wmv file
ffmpeg -i Palivaalaa.wmv -codec copy -vbsf h264_mp4toannexb -map 0 -f segment -segment_list palivaalaa.m3u8 -segment_time 10 palivaalaa%03d.ts
Error
ffmpeg version N-89041-g91a565e20f Copyright (c) 2000-2017 the FFmpeg developers
built with gcc 7.2.0 (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-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-cuda --enable-cuvid --enable-d3d11va --enable-nvenc --enable-dxva2 --enable-avisynth --enable-libmfx
libavutil 56. 0.100 / 56. 0.100
libavcodec 58. 3.101 / 58. 3.101
libavformat 58. 2.100 / 58. 2.100
libavdevice 58. 0.100 / 58. 0.100
libavfilter 7. 0.101 / 7. 0.101
libswscale 5. 0.101 / 5. 0.101
libswresample 3. 0.101 / 3. 0.101
libpostproc 55. 0.100 / 55. 0.100
[wmv3 # 0000024020a04a40] Extra data: 8 bits left, value: 20
Guessed Channel Layout for Input Stream #0.0 : stereo
Input #0, asf, from 'Palivaalaa.wmv':
Metadata:
Application : Windows Movie Maker 2.6.4037.0
WMFSDKVersion : 12.0.16299.248
WMFSDKNeeded : 0.0.0.0000
artist : Sathish
IsVBR : 0
DeviceConformanceTemplate: MP#ML
Duration: 00:01:00.10, start: 0.000000, bitrate: 571 kb/s
Stream #0:0(eng): Audio: wmav2 (a[1][0][0] / 0x0161), 44100 Hz, stereo, fltp, 96 kb/s
Stream #0:1(eng): Video: wmv3 (Main) (WMV3 / 0x33564D57), yuv420p, 640x480, 768 kb/s, SAR 1:1 DAR 4:3, 25 fps, 25 tbr, 1k tbn, 1k tbc
[AVBSFContext # 0000024020a9b420] Codec 'wmv3' (71) is not supported by the bitstream filter 'h264_mp4toannexb'. Supported codecs are: h264 (27)
Error initializing bitstream filter: h264_mp4toannexb
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #0:1 -> #0:1 (copy)
Last message repeated 1 times

HLS with TS files only supports h.264 video codec and aac or mp3 audio. Hence -codec copy will not work. Just remove that, and ffmpeg should choose libx264 automatically.

This file formats support by the TS muxer are listed here https://github.com/FFmpeg/FFmpeg/blob/master/libavformat/mpegts.h#L45-L64
In summary they are:
VIDEO_MPEG1
VIDEO_MPEG2
AUDIO_MPEG1
AUDIO_MPEG2
AUDIO_AAC
AAC_LATM
VIDEO_MPEG4
METADATA
VIDEO_H264
VIDEO_HEVC
VIDEO_CAVS
VIDEO_VC1
VIDEO_DIRAC
AUDIO_AC3
AUDIO_DTS
AUDIO_TRUEHD
AUDIO_EAC3
None of the codecs you are trying are listed. And as it has in it's name the -vbsf h264_mp4toannexb and the error message Codec 'wmv3' (71) is not supported by the bitstream filter 'h264_mp4toannexb'. Supported codecs are: h264 (27), the h264_mp4toannexb filter only supports h264

Use ffmpeg for incoming youtube HLS live stream and output to rtmp

I can't get ffmpeg to work with live streams from youtube. Normal non-live videos work just fine. But with live streams ffmpeg seems like it doesn't make enough requests for new segments. It basically downloads, say a 3 second segment, then nothing happens for 10 seconds or so, then it downloads a new segment, repeat...
ffmpeg -i '$(./youtube-dl -f best -g https://www.youtube.com/watch?v=emGI3UrzIMc)' -f flv rtmp://192.168.0.11/myapp/mystream
So what's the automagic command?
ffmpeg version:
ffmpeg version 3.4.2 Copyright (c) 2000-2018 the FFmpeg developers
built with gcc 7.3.0 (Rev1, Built by MSYS2 project)
configuration: --prefix=/mingw64 --target-os=mingw32 --arch=x86_64 --disable-debug --disable-static --enable-avresample --enable-dxva2 --enable-d3d11va --enable-fontconfig --enable-gnutls --enable-gpl --enable-libass --enable-libbluray --enable-libcaca --enable-libcelt --enable-libfreetype --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libx265 --enable-libxvid --enable-libvpx --enable-libwebp --enable-openal --enable-libwavpack --enable-pic --enable-postproc --enable-runtime-cpudetect --enable-shared --enable-static --enable-swresample --enable-version3 --enable-zlib --disable-doc
libavutil 55. 78.100 / 55. 78.100
libavcodec 57.107.100 / 57.107.100
libavformat 57. 83.100 / 57. 83.100
libavdevice 57. 10.100 / 57. 10.100
libavfilter 6.107.100 / 6.107.100
libavresample 3. 7. 0 / 3. 7. 0
libswscale 4. 8.100 / 4. 8.100
libswresample 2. 9.100 / 2. 9.100
libpostproc 54. 7.100 / 54. 7.100
youtube-dl version: 2018.03.14
Following is the output of the command above. The <MY NOTE #> is added by me for description purposes.
At start execution goes smoothly. It then freezes for 10 or 15 sec at <MY NOTE 1>. It then downloads the part of the stream - <MY NOTE 2>, plays is, then freezes again for some seconds. Then downloads the next part - <MY NOTE 3>, plays it, freezes, and so on...
$ ffmpeg -i '$(./youtube-dl -f best -g https://www.youtube.com/watch?v=emGI3UrzIMc)' -f flv rtmp://192.168.0.11/myapp/mystream
ffmpeg version 3.4.2 Copyright (c) 2000-2018 the FFmpeg developers
built with gcc 7.3.0 (Rev1, Built by MSYS2 project)
configuration: --prefix=/mingw64 --target-os=mingw32 --arch=x86_64 --disable-debug --disable-static --enable-avresample --enable-dxva2 --enable-d3d11va --enable-fontconfig --enable-gnutls --enable-gpl --enable-libass --enable-libbluray --enable-libcaca --enable-libcelt --enable-libfreetype --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libx265 --enable-libxvid --enable-libvpx --enable-libwebp --enable-openal --enable-libwavpack --enable-pic --enable-postproc --enable-runtime-cpudetect --enable-shared --enable-static --enable-swresample --enable-version3 --enable-zlib --disable-doc
libavutil 55. 78.100 / 55. 78.100
libavcodec 57.107.100 / 57.107.100
libavformat 57. 83.100 / 57. 83.100
libavdevice 57. 10.100 / 57. 10.100
libavfilter 6.107.100 / 6.107.100
libavresample 3. 7. 0 / 3. 7. 0
libswscale 4. 8.100 / 4. 8.100
libswresample 2. 9.100 / 2. 9.100
libpostproc 54. 7.100 / 54. 7.100
[hls,applehttp # 00000287da404cc0] Opening 'https://r4---sn-cap1vv-nv4l.googlevideo.com/videoplayback/id/emGI3UrzIMc.0/itag/95/source/yt_live_broadcast/requiressl/yes/ratebypass/yes/live/1/cmbypass/yes/goi/160/sgoap/gir%3Dyes%3Bitag%3D140/sgovp/gir%3Dyes%3Bitag%3D136/hls_chunk_host/r4---sn-cap1vv-nv4l.googlevideo.com/ei/6jiqWt7SIJKD8gPimZTACA/playlist_type/DVR/gcr/bg/initcwndbps/10410/mm/32/mn/sn-cap1vv-nv4l/ms/lv/mv/m/pcm2cms/yes/pl/16/keepalive/yes/mt/1521105015/ip/130.204.135.162/ipbits/0/expire/1521126730/sparams/ip,ipbits,expire,id,itag,source,requiressl,ratebypass,live,cmbypass,goi,sgoap,sgovp,hls_chunk_host,ei,playlist_type,gcr,initcwndbps,mm,mn,ms,mv,pcm2cms,pl/signature/503304477BD05CCC71061344F8BB23195E152A32.512A84732C501AF08AC9340181A75D34C5B2FF77/key/dg_yt0/playlist/index.m3u8/sq/1308292/goap/clen%3D48852%3Blmt%3D1520930742662673/govp/clen%3D347004%3Blmt%3D1520930742662679/dur/2.000/file/seg.ts' for reading
Input #0, hls,applehttp, from 'https://manifest.googlevideo.com/api/manifest/hls_playlist/id/emGI3UrzIMc.0/itag/95/source/yt_live_broadcast/requiressl/yes/ratebypass/yes/live/1/cmbypass/yes/goi/160/sgoap/gir%3Dyes%3Bitag%3D140/sgovp/gir%3Dyes%3Bitag%3D136/hls_chunk_host/r4---sn-cap1vv-nv4l.googlevideo.com/ei/6jiqWt7SIJKD8gPimZTACA/playlist_type/DVR/gcr/bg/initcwndbps/10410/mm/32/mn/sn-cap1vv-nv4l/ms/lv/mv/m/pcm2cms/yes/pl/16/dover/10/keepalive/yes/mt/1521105015/ip/130.204.135.162/ipbits/0/expire/1521126730/sparams/ip,ipbits,expire,id,itag,source,requiressl,ratebypass,live,cmbypass,goi,sgoap,sgovp,hls_chunk_host,ei,playlist_type,gcr,initcwndbps,mm,mn,ms,mv,pcm2cms,pl/signature/503304477BD05CCC71061344F8BB23195E152A32.512A84732C501AF08AC9340181A75D34C5B2FF77/key/dg_yt0/playlist/index.m3u8':
Duration: N/A, start: 39603.798400, bitrate: N/A
Program 0
Metadata:
variant_bitrate : 0
Stream #0:0: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp
Metadata:
variant_bitrate : 0
Stream #0:1: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 30 fps, 30 tbr, 90k tbn, 60 tbc
Metadata:
variant_bitrate : 0
Stream mapping:
Stream #0:1 -> #0:0 (h264 (native) -> flv1 (flv))
Stream #0:0 -> #0:1 (aac (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
Output #0, flv, to 'rtmp://192.168.0.11/myapp/mystream':
Metadata:
encoder : Lavf57.83.100
Stream #0:0: Video: flv1 (flv) ([2][0][0][0] / 0x0002), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 30 fps, 1k tbn, 30 tbc
Metadata:
variant_bitrate : 0
encoder : Lavc57.107.100 flv
Side data:
cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
Stream #0:1: Audio: mp3 (libmp3lame) ([2][0][0][0] / 0x0002), 48000 Hz, stereo, fltp
Metadata:
variant_bitrate : 0
<MY NOTE 1>encoder : Lavc57.107.100 libmp3lame
<MY NOTE 2>[hls,applehttp # 00000287da404cc0] Opening 'https://r4---sn-cap1vv-nv4l.googlevideo.com/videoplayback/id/emGI3UrzIMc.0/itag/95/source/yt_live_broadcast/requiressl/yes/ratebypass/yes/live/1/cmbypass/yes/goi/160/sgoap/gir%3Dyes%3Bitag%3D140/sgovp/gir%3Dyes%3Bitag%3D136/hls_chunk_host/r4---sn-cap1vv-nv4l.googlevideo.com/ei/6jiqWt7SIJKD8gPimZTACA/playlist_type/DVR/gcr/bg/initcwndbps/10410/mm/32/mn/sn-cap1vv-nv4l/ms/lv/mv/m/pcm2cms/yes/pl/16/keepalive/yes/mt/1521105015/ip/130.204.135.162/ipbits/0/expire/1521126730/sparams/ip,ipbits,expire,id,itag,source,requiressl,ratebypass,live,cmbypass,goi,sgoap,sgovp,hls_chunk_host,ei,playlist_type,gcr,initcwndbps,mm,mn,ms,mv,pcm2cms,pl/signature/503304477BD05CCC71061344F8BB23195E152A32.512A84732C501AF08AC9340181A75D34C5B2FF77/key/dg_yt0/playlist/index.m3u8/sq/1308293/goap/clen%3D48853%3Blmt%3D1520930742662680/govp/clen%3D404944%3Blmt%3D1520930742662686/dur/2.000/file/seg.ts' for reading
<MY NOTE 3>[hls,applehttp # 00000287da404cc0] Opening 'https://r4---sn-cap1vv-nv4l.googlevideo.com/videoplayback/id/emGI3UrzIMc.0/itag/95/source/yt_live_broadcast/requiressl/yes/ratebypass/yes/live/1/cmbypass/yes/goi/160/sgoap/gir%3Dyes%3Bitag%3D140/sgovp/gir%3Dyes%3Bitag%3D136/hls_chunk_host/r4---sn-cap1vv-nv4l.googlevideo.com/ei/6jiqWt7SIJKD8gPimZTACA/playlist_type/DVR/gcr/bg/initcwndbps/10410/mm/32/mn/sn-cap1vv-nv4l/ms/lv/mv/m/pcm2cms/yes/pl/16/keepalive/yes/mt/1521105015/ip/130.204.135.162/ipbits/0/expire/1521126730/sparams/ip,ipbits,expire,id,itag,source,requiressl,ratebypass,live,cmbypass,goi,sgoap,sgovp,hls_chunk_host,ei,playlist_type,gcr,initcwndbps,mm,mn,ms,mv,pcm2cms,pl/signature/503304477BD05CCC71061344F8BB23195E152A32.512A84732C501AF08AC9340181A75D34C5B2FF77/key/dg_yt0/playlist/index.m3u8/sq/1308294/goap/clen%3D48852%3Blmt%3D1520930742662688/govp/clen%3D403294%3Blmt%3D1520930742662693/dur/2.000/file/seg.ts' for reading
[hls,applehttp # 00000287da404cc0] Opening 'https://r4---sn-cap1vv-nv4l.googlevideo.com/videoplayback/id/emGI3UrzIMc.0/itag/95/source/yt_live_broadcast/requiressl/yes/ratebypass/yes/live/1/cmbypass/yes/goi/160/sgoap/gir%3Dyes%3Bitag%3D140/sgovp/gir%3Dyes%3Bitag%3D136/hls_chunk_host/r4---sn-cap1vv-nv4l.googlevideo.com/ei/6jiqWt7SIJKD8gPimZTACA/playlist_type/DVR/gcr/bg/initcwndbps/10410/mm/32/mn/sn-cap1vv-nv4l/ms/lv/mv/m/pcm2cms/yes/pl/16/keepalive/yes/mt/1521105015/ip/130.204.135.162/ipbits/0/expire/1521126730/sparams/ip,ipbits,expire,id,itag,source,requiressl,ratebypass,live,cmbypass,goi,sgoap,sgovp,hls_chunk_host,ei,playlist_type,gcr,initcwndbps,mm,mn,ms,mv,pcm2cms,pl/signature/503304477BD05CCC71061344F8BB23195E152A32.512A84732C501AF08AC9340181A75D34C5B2FF77/key/dg_yt0/playlist/index.m3u8/sq/1308295/goap/clen%3D48355%3Blmt%3D1520930742662695/govp/clen%3D358330%3Blmt%3D1520930742662700/dur/2.000/file/seg.ts' for reading
[hls,applehttp # 00000287da404cc0] Opening 'https://r4---sn-cap1vv-nv4l.googlevideo.com/videoplayback/id/emGI3UrzIMc.0/itag/95/source/yt_live_broadcast/requiressl/yes/ratebypass/yes/live/1/cmbypass/yes/goi/160/sgoap/gir%3Dyes%3Bitag%3D140/sgovp/gir%3Dyes%3Bitag%3D136/hls_chunk_host/r4---sn-cap1vv-nv4l.googlevideo.com/ei/6jiqWt7SIJKD8gPimZTACA/playlist_type/DVR/gcr/bg/initcwndbps/10410/mm/32/mn/sn-cap1vv-nv4l/ms/lv/mv/m/pcm2cms/yes/pl/16/keepalive/yes/mt/1521105015/ip/130.204.135.162/ipbits/0/expire/1521126730/sparams/ip,ipbits,expire,id,itag,source,requiressl,ratebypass,live,cmbypass,goi,sgoap,sgovp,hls_chunk_host,ei,playlist_type,gcr,initcwndbps,mm,mn,ms,mv,pcm2cms,pl/signature/503304477BD05CCC71061344F8BB23195E152A32.512A84732C501AF08AC9340181A75D34C5B2FF77/key/dg_yt0/playlist/index.m3u8/sq/1308296/goap/clen%3D48852%3Blmt%3D1520930742662701/govp/clen%3D347658%3Blmt%3D1520930742662707/dur/2.000/file/seg.ts' for reading
frame= 225 fps=1.8 q=31.0 size= 947kB time=00:00:07.92 bitrate= 979.2kbits/s speed=0.0625x
And you don't have to output to a rtmp. Can be a local file - behavior is the same.

Try using the hls prefix. Example:
ffmpeg -i "hls+$(./youtube-dl -f best -g https://www.youtube.com/watch?v=emGI3UrzIMc)" -f flv rtmp://192.168.0.11/myapp/mystream

linux ffmpeg get rtmp stream and convert into a live webcam v4l2

So I simply try out to get the stream and convert it into a rawvideo and create a new webcam with v4l2.
ffmpeg -i "rtmp://XX.XX.XXX.XXX/XXXXXXXXXXXX/test" -vcodec rawvideo -y -f v4l2 /dev/video2
It is working a long time and then I got this:
ffmpeg version 2.7.1 Copyright (c) 2000-2015 the FFmpeg developers
built with gcc 5.1.0 (GCC)
configuration: --prefix=/usr --disable-debug --disable-static --disable-stripping --enable-avisynth --enable-avresample --enable-fontconfig --enable-gnutls --enable-gpl --enable-libass --enable-libbluray --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libspeex --enable-libssh --enable-libtheora --enable-libv4l2 --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-shared --enable-version3 --enable-x11grab
libavutil 54. 27.100 / 54. 27.100
libavcodec 56. 41.100 / 56. 41.100
libavformat 56. 36.100 / 56. 36.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 16.101 / 5. 16.101
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.100 / 1. 2.100
libpostproc 53. 3.100 / 53. 3.100
Input #0, flv, from 'rtmp://XX.XX.XXX.XXX/XXXXXXXXXXXX/test':
Metadata:
fileSize : 0
audiochannels : 2
encoder : obs-output module (libobs version 0.10.1-67-g94edb7f)
Duration: 00:00:00.00, start: 1774.608000, bitrate: N/A
Stream #0:0: Video: h264 (High), yuv420p(tv, bt709), 1920x1080, 2560 kb/s, 30.30 fps, 30 tbr, 1k tbn, 60 tbc
Stream #0:1: Audio: aac (LC), 44100 Hz, stereo, fltp, 196 kb/s
[v4l2 # 0x7f7326cb4480] Unable to open V4L2 device '/dev/video2'
Output #0, v4l2, to '/dev/video2':
Metadata:
fileSize : 0
audiochannels : 2
encoder : Lavf56.36.100
Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 1920x1080, q=2-31, 200 kb/s, 30 fps, 30 tbn, 30 tbc
Metadata:
encoder : Lavc56.41.100 rawvideo
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> rawvideo (native))
Could not write header for output file #0 (incorrect codec parameters ?): No such file or directory

To create virtual video devices you need to install and enable v4l2loopback. The "No such file or directory" message means you didn't enable the device.
sudo modprobe v4l2loopback video_nr=2
This will create the /dev/video2 device.
Update: in response to umläute's comment make sure the v4l2loopback module is persistent, just in case your server reboots. Uptime can be very long.
Example for CentOS: Persistent Module Loading

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