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• ffmpeg : simple RTMP streaming over LAN

  30 mars 2013, par sajad

  I am trying to launch up a rtmp transcoder server using ffmpeg ; that receives udp MPEG-TS streams as input, transcodes it ; and generates an rtmp output to a URL, that can be accessed by users to receive and play the rtmp stream. All these are expected to be performed in a LAN and the output be accessed by all users.

  1) First I don't know where the URL should point to. Is it enought to specify the IP of the system and some optional port ? Is it neccessary that a program should be listening on that port ?

  2) How I can play the stream on the URL ?

  I use a linux ubuntu machine whith IP=10.1.1.229 and I want to transcode multicast stream on this URL : udp://@224.10.1.1:2001.

  here is the command used to transcode input stream and generate rtmp url "rtmp ://10.1.1.229:2020".

  ffmpeg -y -f mpegts -i "udp://@224.10.1.1:2001" -re -vcodec libx264 -maxrate 700k -r 25 -s 640x360 -deinterlace -acodec libfaac -ab 64k -ac 1 -ar 44100 -f flv "rtmp://10.1.1.229:2020"

  and here is the command by which I am trying to play rtmp stream :

  ffplay rtmp://10.1.1.229:2020

  Any guidance would be helpfull. Thank you.

• ffmpeg : simple RTMP streaming

  2 avril 2013, par sajad

  I am trying to launch up a rtmp transcoder server using ffmpeg ; that receives udp MPEG-TS streams as input, transcodes it ; and generates an rtmp output to a URL, that can be accessed by users to receive and play the rtmp stream. All these are expected to be performed in a LAN and the output be accessed by all users.

  1) First I don't know where the URL should point to. Is it enought to specify the IP of the system and some optional port ? Is it neccessary that a program should be listening on that port ?

  2) How I can play the stream on the URL ?

  I use a linux ubuntu machine whith IP=10.1.1.229 and I want to transcode multicast stream on this URL : udp://@224.10.1.1:2001.

  here is the command used to transcode input stream and generate rtmp url "rtmp ://10.1.1.229:2020".

  ffmpeg -y -f mpegts -i "udp://@224.10.1.1:2001" -re -vcodec libx264 -maxrate 700k -r 25 -s 640x360 -deinterlace -acodec libfaac -ab 64k -ac 1 -ar 44100 -f flv "rtmp://10.1.1.229:2020"

  and here is the command by which I am trying to play rtmp stream :

  ffplay rtmp://10.1.1.229:2020

  Any guidance would be helpfull. Thank you.

• What encoders/decoders/muxers/demuxers/parsers/filters do I need to enable in FFMpeg for converting an mp4 video to a gif ?

  21 juin 2020, par kostik

  I am building FFmpeg with custom options to reduce the final size of apk file on android. I want just convert a mp4 file to a gif.
Following is my options specified

  


   --disable-everything
 --enable-decoder=mpeg4,mpegvideo,aac,gif,h264
 --enable-parser=aac,mpeg4video,mpegaudio,mpegvideo,gif,h264
 --enable-demuxer=mpegvideo,aac,mov,gif,h264
 --enable-muxer=mp4,gif,mov,h264
 --enable-protocol=file
 --enable-encoder=mpeg4,mov,gif,h264
 --enable-filter=scale,fps,copy,palettegen,vflip,paletteuse,crop


  


  What other options do i need to add to successfully run this command ?

  


  ffmpeg -y -i input.mp4 -vf "fps=15,scale=320:-1:flags=lanczos" -pix_fmt rgb24 output.gif


  


  or this command

  


  ffmpeg -y -i input.mp4 output.gif


  


  After I added module into Android Studio I run FFmpeg command.
Iam getting this error :

  


  2020-06-21 12:16:09.883 8871-9102/com.example.myapplication W/mobile-ffmpeg: [graph 0 input from stream 0:0 @ 0x7088243f40] sws_param option is deprecated and ignored
2020-06-21 12:16:09.885 8871-9102/com.example.myapplication W/mobile-ffmpeg: Incompatible pixel format 'rgb24' for codec 'gif', auto-selecting format 'rgb8'
2020-06-21 12:16:09.885 8871-9102/com.example.myapplication E/mobile-ffmpeg: Output pad "default" with type video of the filter instance "Parsed_scale_1" of scale not connected to any destination
2020-06-21 12:16:09.885 8871-9102/com.example.myapplication E/mobile-ffmpeg: Error reinitializing filters!
2020-06-21 12:16:09.885 8871-9102/com.example.myapplication E/mobile-ffmpeg: Failed to inject frame into filter network: Invalid argument
2020-06-21 12:16:09.886 8871-9102/com.example.myapplication E/mobile-ffmpeg: Error while processing the decoded data for stream #0:0


  


  I also tried to include FULL library and it that case everything worked as expected.

  


  Thanks for your help.