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• ffmpeg fmp4 segment encryption

  12 juillet 2022, par V O

  I'm searching for a solution to protect HLS streams using DRM/AES encryption.

  


  Currently, it seems that this is only working with .ts segments not with .m4s segments and .ts files again don't work with HEVC / 4k HDR content, so it seems I'm 100% stuck at this point.

  


  There is also a report from another user (4 years ago) with exactly the same issue : https://trac.ffmpeg.org/ticket/7138
Is there any kind of workaround ? Maybe outside of ffmpeg ?

  


• ffmpeg not adding correct timestamps in recorded files [closed]

  27 avril 2023, par Aman Hanjra

  I am using ffmpeg to record a camera stream using rtsp protocol. I am creating 10 second files by setting output_ts_offset to epoch realtime.
ffmpeg command :
ffmpeg -hide_banner -loglevel warning -rtsp_transport tcp -i rtsp://camera_ip:camera_port/stream_url -muxpreload 0 -muxdelay 0 -c:v copy -an -f segment -strftime 1 -segment_time 10 -output_ts_offset $EPOCHREALTIME -segment_atclocktime 1 -segment_clocktime_offset 30 -segment_format mp4 file_%s_10.mp4

  


  Each file is saved with offset - start_time as epoch timestamp(current timestamp when ffmpeg pipeline starts and keep on adding 10 seconds as it creates 10 second files) and adding the same timestamp in file name also. eg file_1669903600_10.mp4
FPS is 15.
ffprobe output :

  


  start_time=1669903599.93233
duration=10.106771
[/STREAM]
[FORMAT]
filename=file_1669903600_10.mp4
[/FORMAT]

[STREAM]
start_time=**1669903605.53452**
duration=10.106771
[/STREAM]
[FORMAT]
filename=file_**1669903610**_10.mp4
[/FORMAT]


  


  In second example, there is difference of 5 seconds in start_time and filename which is incorrect.
Similarily sometimes there are differences upto 50000 seconds in timestamps.

  


  Files are being saved with start_time metadata either in past or future. Anyone faced the same issue with ffmpeg ?

  


  Sometimes I am getting files with 76ms duration and then this timestamp diff(start_time - filename timestamp) starts increasing negatively by 10 and goes up to -47270(in past) or sometimes it goes in future.

  


  Tried fixing the fps to 15(-r 15 argument) but didn't work.

  


  Expected output :
Timestamps should match(start_time timestamp should be equal to filename timestamp)

  


• ffmpeg output 0 second with wrong coordinates and hidden text

  18 juillet 2023, par Abdullah Mohamed

  I'm trying to add some Text and Images to the video

  


  Code

  


  -i 'input.MOV' -i 'image.jpg'         -filter_complex "[0]crop=1181.25:2100.0:1089.375:0.0[v];
          color=black[c];
          [v]colorchannelmixer=0.39:0.769:0.189:0:0:0.349:0.686:0.168:0:0:0.272:0.534:0.131:0:0:0:0:0[v];
          [c][v]scale2ref[t][v];
          [t]setsar=1,
          colorkey=black,
          split=2[t1][t2];
                  [t1]drawtext=
          text=Abdullah Muhammad T1
          :fontsize=40.0
          :box=1
          :boxborderw=20.0
          :boxcolor=#2196f3
          :fontcolor=#f44336,
          rotate=10.0*PI/180:
  
          c=black@0[rotate];
      [v][rotate]overlay=x=400.0:y=300.0:shortest=1[v],
          
          
                  [t2]drawtext=
          text=Abdullah Muhammad T2
          :fontsize=40.0
          :box=1
          :boxborderw=20.0
          :boxcolor=#ffeb3b
          :fontcolor=#000000,
          rotate=10.0*PI/180:
  
          c=black@0[rotate];
      [v][rotate]overlay=x=0.0:y=0.0:shortest=1[v],
          
          
                  [1:v]scale=w=360.0:h=360.0,
          rotate=-90.0*PI/180:
  ow=rotw(iw-50):oh=roth(ih-50):
          c=black@0[rotate];
      [v][rotate]overlay=x=0.0:y=0.0:shortest=1[v],
          
          
                  [1:v]scale=w=360.0:h=360.0,
          rotate=30.0*PI/180:
  ow=rotw(iw-50):oh=roth(ih-50):
          c=black@0[rotate];
      [v][rotate]overlay=x=200.0:y=600.0:shortest=1
          
          
          " -c:a copy -preset ultrafast -y 'output.mp4'


  


  My Issues

  


  

  1. First image should be at 0,0 coordinates but it's not.

  


  2. There should be 2 Texts but 1 of them is hidden and the other is not fully shown.

  


  3. the video is 13 seconds and the output is only 0 second.

  


  


  Expected

  


  


  Texts should be shown and images should be in the right position and video output should be 13 seconds.

  


  


  Actual


  


  Another issue

  


  


  If I trimmed the video the output will still be the same duration

  


  


  -i 'input_video.MOV' -ss 0:00:00.000000 -t 0:00:16.216000 -i 'input_image.jpg'         -filter_complex "[0]crop=1181.25:2100.0:1089.375:0.0[v];
          color=black[c];
          [v]colorchannelmixer=0.39:0.769:0.189:0:0:0.349:0.686:0.168:0:0:0.272:0.534:0.131:0:0:0:0:0[v];
          [c][v]scale2ref[t][v];
          [t]setsar=1,
          colorkey=black,
          split=2[t1][t2];
                  [t1]drawtext=
          text=Abdullah Muhammad T1
          :fontsize=40.0
          :box=1
          :boxborderw=20.0
          :boxcolor=#2196f3
          :fontcolor=#f44336,
          rotate=10.0*PI/180:
  
          c=black@0[rotate];
      [v][rotate]overlay=x=400.0:y=300.0:shortest=1[v],
          
          
                  [t2]drawtext=
          text=Abdullah Muhammad T2
          :fontsize=40.0
          :box=1
          :boxborderw=20.0
          :boxcolor=#ffeb3b
          :fontcolor=#000000,
          rotate=10.0*PI/180:
  
          c=black@0[rotate];
      [v][rotate]overlay=x=0.0:y=0.0:shortest=1[v],
          
          
                  [1:v]scale=w=360.0:h=360.0,
          rotate=-90.0*PI/180:
  ow=rotw(iw-50):oh=roth(ih-50):
          c=black@0[rotate];
      [v][rotate]overlay=x=0.0:y=0.0:shortest=1[v],
          
          
                  [1:v]scale=w=360.0:h=360.0,
          rotate=30.0*PI/180:
  ow=rotw(iw-50):oh=roth(ih-50):
          c=black@0[rotate];
      [v][rotate]overlay=x=200.0:y=600.0:shortest=1
          
          
          " -c:a copy -preset ultrafast -y 'output.mp4'