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• How to say ffmpeg ignore reboot of ip camera

  25 août 2016, par Svishchev Semen

  I record stream from ip camera with batch file :

  ffmpeg -rtsp_transport tcp -stimeout 50000000 -i  rtsp://192.168.50.50:554/user=admin&password=&channel=1&stream=0.sdp?real_stream" -b:v 900k -acodec copy -vcodec copy -r 30 -f segment -strftime 1 -segment_time 00:30:00 -reset_timestamps 1 -segment_format avi D:\Camera\level2\output_%%d-%%m_%%Y_%%H_%%M.avi

  When ffmpeg lost tcp connection ( 10 sec) to camera recording paused, then link goes up ffmpeg continues to write in the current file. But when i reboot camera by power off/on ffmpeg stop the record and crushes.

  How to say ffmpeg wait for signal from camera and not close record.

  Sorry for my English i’m from Russia.

• FFMpeg Playlist with pipe for streaming [on hold]

  24 juillet 2017, par sword1st

  I’m trying to find a solution for stream multiple files without any connection breaks. I found this answer from KKetch :

  I managed to stream a static playlist of videos by using for each video a pipe (ex vid1.mp4 -> pipe1, vid2.mp4 -> pipe2 etc). Then i write into a single stream named pipe "stream" this way cat pipe1 pipe2 pipe3 > stream, and i use the stream pipe as input in FFMPEG to publish my stream.

  (I’m using windows. I don’t know to use named pipes. I searched a lot but i couldn’t do it. I can do it with vb.net if it’s possible. But i don’t know how :/ Sorry for my bad english)

  But i can’t reply his message cuz i don’t have enough reputation. I hope someone can help me how can i use pipes for input like playlist. Thanks !

• How does one go about undoing an avformat_seek_file call in libavcodec ?

  2 juillet 2020, par John Allard

  I have an application written around libavcodec that sometimes attempts to seek ahead in a video while performing some work. The call to avformat_seek_file can only seek to a keyframe, so sometimes I end up in a situation where it ends up seek backwards from my current position in the decoding routine causing me to have to repeat work. For example, if I'm on frame 150 and I want to seek to frame 200, but the only key frames in the file are on frames 1 and 100, this call will have me seek back to frame 100, meaning I now have to decode 100 frames to get to 200 instead o 50 frames to get to 200 from my original decoding position of frame 150.

  


  Is there a way for me to tell avformat_seek_file to undo its last seek and reset me to my previous location ? Is there some other way for me to "save" my decoding state to undo this wrongful seek manually ?

  


  edit - it should be noted that my videos are always h264 encoded in an mp4 container.