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• Best solution to automatically enrich a video stream with dynamic overlay (text, images, ...)

  17 novembre 2016, par hg.m

  In my company, we are currently looking for a solution to enrich a given video stream (which is being broadcasted via RTMP) from a remote webcam with dynamic information, such as current date/time, special measure values which are available on a server or the most recent entries in a database. Basically we want to achieve a simple, dynamic on-screen display as, for example, TV stations are using. The modified stream should then be restreamed, for example to be viewed in VLC Player or on YouTube.

  So far, I came up with the following ideas :

  • Using OBS with some own scripts and plugins - that’s disadvantageous because we would like to run the solution on a high-network performance server 24/7 without a GUI. Basically I’d need a fully command-line based version of OBS.

  • Using ffmpeg : I know that there are text filters available, but they are mainly static (or periodically polling a file with text) and don’t allow for any design adjustments other than font, font size and color. It would be great if there was some way of overlaying a Webkit browser view onto the stream, because this would allow us to design the overlays in HTML5 and CSS and using WebSocket technology for updating the data.

    • The overlay could be captured with PhantomJS, but how should we unify it with the stream and would it be fast enough to render 30 FPS ?

  Are there additional (preferably open source) tools we could use ? What would be the best strategy to implement this without buying expensive TV broadcasting software ?

• ffmpeg, we reported the error of av_interleaved_write_frame() : End of fileB Error writing trailer of rtmps ://live-api-s.facebook.com:443/rtmp/*

  21 octobre 2022, par yong zhang

  We want to implement such a small function, using webrtc technology on the web side to push the stream to the webrtc service of SRS, and then push the rtmp stream of SRS to the go live of facebook through ffmpeg to push the live broadcast. But we encountered a problem. When we forwarded and pushed the stream with ffmpeg, we reported the error of av_interleaved_write_frame() : End of fileB Error writing trailer of rtmps ://live-api-s.facebook.com:443/rtmp/. Please help and guide the heroes to see where the problem may occur.
The command we executed is : ./ffmpeg -threads 2 -thread_queue_size 9512 -re -i "rtmp ://xxx.xxx.xxx:1935/live/" -max_muxing_queue_size 1024 -force_key_frames "expr:gte (t,n_forced2)" -vf crop=in_w:in_w9/16,scale=1280:720 -reorder_queue_size 4000 -max_delay 10000000 -c:v libx264 -preset veryfast -b:v 3000k -maxrate 1500k -bufsize 4000k -g 50 -c:a aac -ac 2 -ar 48000 -f flv -r 30 -flvflags no_duration_filesize "rtmps ://live-api-s.facebook.com:443/rtmp/"
The ffmpeg version is : 4.13 and above all the same error.
SRS version : 5.56

  


• avformat/mpegts : add support for stream_type 0xd2, which is AVS2

  24 août 2021, par Limin Wang

  avformat/mpegts : add support for stream_type 0xd2, which is AVS2
  GB/T 17975.1
  
  Information technology-Generic coding of moving pictures and associated audio
  
  information-Part 1:Systems
  Signed-off-by : Limin Wang <lance.lmwang@gmail.com>
  

  • [DH] libavformat/mpegts.h
  • [DH] libavformat/mpegtsenc.c