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• using ffmpeg to rotate a RTSP stream and then restram that back to my local network ( usign windows )

  29 décembre 2022, par sesipod

  I would like to use FFMPEG to consume a stream from my cctv ip camera,rotate the video feed 90 and then re-streamt that back to my local network over rtsp. I would like to make this work on Windows only, and using the igpu in my machine to help with the cpu load. My camera does not support 90 degree rotation native so the use of FFMPEG would be nice help.

  


  Here is what I have tried so far but it will not give me anything that I can watch on VLC for example.

  


  ffmpeg -i rtsp://admin:passwordhere@192.168.1.147:554/h264Preview_01_main -vf "transpose=2" -c:v libx264 -b:v 1000k -s 640x480 -f rtsp


  


  rtsp://localhost:8888/live.sdp


  


• ffmpeg 'error parsing the packet header' when concatenating mp3 files

  27 décembre 2020, par Dtomper

  I downloaded many songs from youtube and mixed them using this command : ffmpeg -f concat -safe 0 -i mylist.txt -map 0:a mixed.mp3 where mylist.txt is a list of all the downloaded files.
During the exportation I kept getting the following error :

  


  [opus @ 0000022f1bea3700] Error parsing the packet header.
Error while decoding stream #0:0: Invalid data found when processing input
[opus @ 0000022f1bea3700] Error parsing the packet header.
Error while decoding stream #0:0: Invalid data found when processing input
[opus @ 0000022f1bea3700] Error parsing the packet header.
Error while decoding stream #0:0: Invalid data found when processing input
[opus @ 0000022f1bea3700] Error parsing the packet header.
Error while decoding stream #0:0: Invalid data found when processing input
[opus @ 0000022f1bea3700] Error parsing the packet header.
Error while decoding stream #0:0: Invalid data found when processing input
[opus @ 0000022f1bea3700] Error parsing the packet header.
Error while decoding stream #0:0: Invalid data found when processing input
[opus @ 0000022f1bea3700] Error parsing the packet header.
Error while decoding stream #0:0: Invalid data found when processing input
[opus @ 0000022f1bea3700] Error parsing the packet header.
Error while decoding stream #0:0: Invalid data found when processing input
[opus @ 0000022f1bea3700] Error parsing the packet header.
Error while decoding stream #0:0: Invalid data found when processing input
[opus @ 0000022f1bea3700] Error parsing the packet header.
Error while decoding stream #0:0: Invalid data found when processing input
[opus @ 0000022f1bea3700] Error parsing the packet header.
Error while decoding stream #0:0: Invalid data found when processing input


  


  After the mix was exported, I heard it and there was a weird sound playing when it was the turn of this song : https://www.youtube.com/watch?v=iY0RwKIG_BQ

  


  At first, I used youtube-dl to download the song from python. After that, I used https://ytmp3.cc/ but none of them worked. I keep getting this error and that weird sound in the mix file.

  


• Error when trying to launch ffplay on Ubuntu server 16

  18 décembre 2019, par Nicolas

  For work I need to get a video+audio link working between a machine running Ubuntu server 16 and a client machine running Ubuntu 18.04.
  On the server side we have a webcam (with a microphone) and a speaker. The idea is that the client can see and hear what happens in front of the webcam, and can talk to whoever is next to the server.

  For this purpose, I run ffserver+ffmpeg on the server side to stream video and audio (that works, the client can see and hear what happens around the server), and the client also runs ffserver+ffmpeg on a different port, so that the server can use ffplay to hear what the client says.
  Unfortunately for some reason at the moment the server cannot run ffplay. I get the following error :

   # ffplay -probesize 32 -sync ext http://localhost:8090/camera.rm
  
     ffplay version 2.8.15-0ubuntu0.16.04.1 Copyright (c) 2003-2018 the FFmpeg developers
  
     built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 20160609
  
     configuration: --prefix=/usr --extra-version=0ubuntu0.16.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enableopengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv
  
     libavutil      54. 31.100 / 54. 31.100
  
     libavcodec     56. 60.100 / 56. 60.100
  
     libavformat    56. 40.101 / 56. 40.101
  
     libavdevice    56.  4.100 / 56.  4.100
  
     libavfilter     5. 40.101 /  5. 40.101
  
     libavresample   2.  1.  0 /  2.  1.  0
  
     libswscale      3.  1.101 /  3.  1.101
  
     libswresample   1.  2.101 /  1.  2.101
  
     libpostproc    53.  3.100 / 53.  3.100
  
   ALSA lib pcm_dmix.c:1029:(snd_pcm_dmix_open) unable to open slave
  
   Input #0, rm, from 'http://localhost:8090/camera.rm':    0B f=0/0   
  
     Metadata:
  
       title           : 
  
       author          : 
  
       copyright       : 
  
       comment         : 
  
     Duration: 01:00:00.00, start: 0.000000, bitrate: N/A
  
       Stream #0:0: Audio: ac3 (dnet / 0x74656E64), 22050 Hz, mono, fltp, 32 kb/s
  
       Stream #0:1: Video: rv10 (RV10 / 0x30315652), yuv420p, 640x480, 2048 kb/s, 24464 fps, 24464 tbr, 1k tbn, 1k tbc
  
   SDL_OpenAudio (1 channels, 22050 Hz): 
  
   No more combinations to try, audio open failed

  To be noted : ffplay has worked in the past on this server. The only modifications that were made are that I added some feeds and streams in the ffserver.conf, but they are not even used. I tried marking my additions as comments and repeating the test, but ffplay still doesn’t work.

  My ffserver.conf file is as below :

  HTTPPort            8090
  
  HTTPBindAddress     0.0.0.0
  
  MaxHTTPConnections 200
  
  MaxClients      100
  
  MaxBandWidth    500000
  
  CustomLog       -
  
  #NoDaemon
  
  
  
  <feed>
  
  File            /tmp/camera.ffm
  
  FileMaxSize     200M
  
  </feed>
  
  
  
  #<feed>
  
  #File            /tmp/test.ffm
  
  #FileMaxSize     200k
  
  #</feed>
  
  
  
  #<feed>
  
  #File /tmp/audio.ffm>
  
  #FileMaxSize 200M
  
  #</feed>
  
  
  
  <stream>
  
  Feed camera.ffm
  
  Format rm
  
  AudioBitRate 32
  
  VideoFrameRate 15
  
  VideoIntraOnly
  
  VideoBitRate 2048
  
  VideoBufferSize 2048
  
  VideoSize 640x480
  
  VideoQMin 5
  
  VideoQMax 51
  
  Strict -1
  
  </stream>
  
  
  
  #<stream>
  
  #Feed test.ffm
  
  #AudioBitRate 32
  
  #AudioChannels 1
  
  #AudioSampleRate 44100
  
  #VideoBitRate 512
  
  #VideoBufferSize 40
  
  #VideoFrameRate 24
  
  #VideoSize 640x640
  
  #VideoGopSize 12
  
  #VideoQMin 1
  
  #VideoQMax 15
  
  #</stream>
  
  
  
  #<stream>
  
  #Feed audio.ffm
  
  #Format rm
  
  #AudioBitRate 128
  
  #NoVideo
  
  #</stream>

  And I use the following commands :

  On the server side : ffserver -f /etc/ffserver.conf

  and : ffmpeg -f v4l2 -i /dev/video0 -f alsa -ac 2 -i hw:0 http://localhost:8090/camera.ffm

  and to receive audio : ffplay -probesize 32 -sync ext http://10.1.0.244:8080/audio.ra

  And on the client side : ffserver -f /etc/ffserver.conf

  and : ffmpeg -f alsa -ac 2 -i hw:0 http://localhost:8080/audio.ffm

  The two ffserver.conf files (on server and client) are identical, apart for the port which is different (8090 on the server and 8080 on the client).

  Does anyone have any idea why ffplay won’t start on my server ?
  Thanks,
  Nicolas.