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• Webcam - Publishing and Archiving on line video files

  11 novembre 2014, par Emmanuel Brunet

  I want to publish an ASF live video stream over the internet and also copy the backup to disk (without sound to spare disk space)

  I’m running debian 7.7 wheezy / ffmpeg 2.2 and ffserver 1.2.9.

  ---

  The IP camera video streams specifications are

  Input #0, asf, from 'http://account:password@webcam/videostream.asf':
  
    Duration: N/A, start: 0.000000, bitrate: 32 kb/s
  
      Stream #0:0: Video: mjpeg (MJPG / 0x47504A4D), yuvj422p(pc), 640x480, 50 tbr, 1k tbn, 1k tbc
  
      Stream #0:1: Audio: adpcm_ima_wav ([17][0][0][0] / 0x0011), 8000 Hz, 1 channels, s16p, 32 kb/s

  To achieve this I have set up a /etc/ffserver.conf configuration

  Port 11000
  
  
  
  BindAddress 0.0.0.0
  
  
  
  MaxClients 1000
  
  
  
  MaxBandwidth 40000
  
  
  
  CustomLog -
  
  
  
  <feed>
  
  File /tmp/feed1.ffm
  
  FileMaxSize 200K
  
  ACL allow localhost
  
  ACL allow 192.168.1.1 192.168.255.255
  
  
  
  </feed>
  
  
  
  
  
  # --------------------------- ASF ----------------------
  
  
  
  <stream>
  
  Feed feed1.ffm
  
  Format asf
  
  
  
  AVOptionVideo flags +global_header
  
  VideoFrameRate 25
  
  VideoSize 640x480
  
  VideoBitRate 1024
  
  VideoBufferSize 1024
  
  StartSendOnKey
  
  NoAudio
  
  </stream>
  
  
  
  # ------------ Server status -------------------
  
  
  
  <stream>
  
  Format status
  
  
  
  # Only allow local people to get the status
  
  ACL allow localhost
  
  ACL allow 192.168.0.0 192.168.255.255
  
  
  
  #FaviconURL http://pond1.gladstonefamily.net:8080/favicon.ico
  
  </stream>
  
  
  
  
  
  # ---------- Redirect --------------------
  
  
  
  <redirect>
  
  URL http://www.ffmpeg.org/
  
  </redirect>

  To connect the feed I run

  to start the ffserver

  ffserver -f /etc/ffserver.conf

  to collect the stream from the camera

  ffmpeg -i http://account:password@webcam/videostream.asf -c:v libx264 -an http://localhost:11000/feed1.ffm

  and all works like a charm.

  ---

  My questions are :

  • How in the same time having the stream saved to disk ?

  (as done by the command)

  ffmpeg -i http://account:password@webcam/videostream.asf -preset veryfast -t 00:60:00 -b:v 512K -c:v libx264 -pix_fmt yuv420p -an /var/backup/videos/YYY-MM-DD.mp4

  Note that the output .mp4 file names should rotate to get multiple timestamped output archives

  • How can I published video over RTSP ?

  I’ve found examples on the internet but none worked for me

  Thanks in advance

  regards

• avformat : Do not use AVFMT_RAWPICTURE

  12 octobre 2015, par Luca Barbato

  avformat : Do not use AVFMT_RAWPICTURE
  There are no formats supporting it anymore and it is deprecated.
  
  Update the documentation accordingly.
  

  • [DBH] avconv.c
  • [DBH] doc/examples/output.c
  • [DBH] libavformat/avformat.h
  • [DBH] libavformat/version.h

• Using Coldfusion's CFFILE tag to monitor a progress log from FFMpeg

  5 mai 2013, par user1493918

  I want to learn how to use the CFFILE tag from ColdFusion to read the contents of a text file. In my case, that text file is a progress log that is generated by FFMpeg while it transcodes a media file. I want to write a ColdFusion script that will poll the progress log periodically, until the log indicates that FFMpeg has finished its transcoding operation. On the client side I can then use Ajax to hit that ColdFusion script and show the user a "percentage completed" while FFMpeg does its work.

  I got FFMpeg to generate the log file by using a new "progress" flag that recent versions of FFMpeg now support. Below I'll show you the way to use this flag, and also the generated output within the log file.

  Here's the FFMpeg command :

  ffmpeg -i c:\my_original_file.ogg c:\my_converted_file.mp3 -progress c:\my_progress.txt

  The above command will cause FFMpeg to generate a log file called my_progress.txt.

  Here's what it generates in the log file :

  total_size=206150
  
  out_time_ms=51410044
  
  out_time=00:00:51.410044
  
  dup_frames=0
  
  drop_frames=0
  
  progress=continue

  The above 6 lines are generated repeatedly in the log file, with increasing values.

  total_size=206150
  
  out_time_ms=51410044
  
  out_time=00:00:51.410044
  
  dup_frames=0
  
  drop_frames=0
  
  progress=continue
  
  total_size=412413
  
  out_time_ms=102975756
  
  out_time=00:01:42.975756
  
  dup_frames=0
  
  drop_frames=0
  
  progress=continue
  
  total_size=618363
  
  out_time_ms=154463111
  
  out_time=00:02:34.463111
  
  dup_frames=0
  
  drop_frames=0
  
  progress=continue
  
  total_size=824939
  
  out_time_ms=206107189
  
  out_time=00:03:26.107189
  
  dup_frames=0
  
  drop_frames=0
  
  progress=continue

  Finally, when the job completes, the final block of 6 lines are the last ones in the log file. Notice the "progress=end" on the last line :

  total_size=9725902
  
  out_time_ms=2431348011
  
  out_time=00:40:31.348011
  
  dup_frames=0
  
  drop_frames=0
  
  progress=end

  I want to write a Coldfusion script using the CFFILE tag to read only the last 6 lines of the file (no matter how large the file has become), and to do this each time the script is called, by the browser, via Ajax. Finally I need to parse the values on these lines into variables so I can return some data to the caller.

  I've researched progress bars for FFMpeg but they're in PHP which is hard for me, and besides, they parse the older formatted versions of FFMpeg's log files, and I would like to use the above newer formatting. Can anyone please help ?