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• Creating files with irregular names in Segment Demuxer

  19 novembre 2022, par Ali

  I have a video stream coming from tvheadend and I record it in 10 second chunks
This is my recording command :

  


  ffmpeg -i INPUT_PATH -f ssegment -segment_time 10 -segment_atclocktime 1 -segment_clocktime_offset 0 -write_empty_segments 1 -strftime 1 -b:v 3M -b:a 128k "TNA-%Y-%m-%d-%H-%M-%S.ts"


  


  This command works fine for me and creates the following files for me without any problem

  


  

  • TNA-2022-11-19-20-35-20

  


  • TNA-2022-11-19-20-35-30

  


  • TNA-2022-11-19-20-35-40

  


  • TNA-2022-11-19-20-35-50

  


  • TNA-2022-11-19-20-36-00

  


  


  But the input stream is H264 and this command records in MPEG-2 format
In the meantime, I lose the quality of the stream

  


  On the other hand, if I add the -c:v libx264 -c:a aac option, irregular files are generated.
For example :

  


  

  • TNA-2022-11-19-20-36-20

  


  • TNA-2022-11-19-20-36-33

  


  • TNA-2022-11-19-20-36-43

  


  • TNA-2022-11-19-20-36-53

  


  • TNA-2022-11-19-20-36-04

  


  • TNA-2022-11-19-20-36-14

  


  


  And my software can't find the files anymore

  


  The-break_non_keyframe 1option solves the problem of naming the files, but the image of the files remains fixed for a few seconds when starting

  


  Can anyone help me ?

  


• How to cut video into 4M size mp4 video using ffmpeg

  13 octobre 2022, par fxsshiwo

  I have a *.mp4 video file, which is cut to a fixed size using ffmpeg, using the following commands

  


  '/usr/local/ffmpeg/bin/ffmpeg' '-y' '-ss' '00:00:00.00' '-i' '57066524-1.mp4' '-t' '00:00:05.00' '-vcodec' 'libx264' '-acodec' 'libmp3lame' '-b:v' '1000k' '-refs' '6' '-coder' '1' '-sc_threshold' '40' '-flags' '+loop' '-me_range' '16' '-subq' '7' '-i_qfactor' '0.71' '-qcomp' '0.6' '-qdiff' '4' '-trellis' '1' '-b:a' '128k' '-pass' '1' '-passlogfile' '/tmp/ffmpeg-passes6332bdc9814883qh89/pass-6332bdc98160c' '1.mp4'

  


  but I get an error saying -

  


  Unknown encoder 'libx264'

  


  Here is the complete error message：

  


  ffmpeg version 5.1 Copyright (c) 2000-2022 the FFmpeg developers
  built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-44)
  configuration: --enable-shared --enable-swscale --enable-gpl --enable-nonfree --enable-pic --prefix=/usr/local/ffmpeg --enable-version3 --enable-postproc --enable-pthreads --enable-static --enable-libx264
  libavutil      57. 28.100 / 57. 28.100
  libavcodec     59. 37.100 / 59. 37.100
  libavformat    59. 27.100 / 59. 27.100
  libavdevice    59.  7.100 / 59.  7.100
  libavfilter     8. 44.100 /  8. 44.100
  libswscale      6.  7.100 /  6.  7.100
  libswresample   4.  7.100 /  4.  7.100
  libpostproc    56.  6.100 / 56.  6.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '57066524-1.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: mp42mp41
    creation_time   : 2022-09-26T02:06:24.000000Z
  Duration: 00:00:26.11, start: 0.000000, bitrate: 6683 kb/s
  Stream #0:0[0x1](eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(progressive), 720x720 [SAR 1:1 DAR 1:1], 6367 kb/s, 25 fps, 25 tbr, 25k tbn (default)
    Metadata:
      creation_time   : 2022-09-26T02:06:24.000000Z
      handler_name    : ?Mainconcept Video Media Handler
      vendor_id       : [0][0][0][0]
      encoder         : AVC Coding
  Stream #0:1[0x2](eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 317 kb/s (default)
    Metadata:
      creation_time   : 2022-09-26T02:06:24.000000Z
      handler_name    : #Mainconcept MP4 Sound Media Handler
      vendor_id       : [0][0][0][0]
Unknown encoder 'libx264'



  


  I try to install libx264 and recompile, I still get this error

  


  [install libx264]
git clone https://code.videolan.org/videolan/x264.git
cd x264
./configure --prefix=/usr/local/x264/ --includedir=/usr/local/include --libdir=/usr/local/lib --enable-shared
./configure --prefix=/usr/softinstall/x264/ --includedir=/usr/local/include --libdir=/usr/local/lib --enable-shared

[compile ffmpeg]
wget http://www.ffmpeg.org/releases/ffmpeg-5.1.tar.gz
tar -zxvf ffmpeg-5.1.tar.gz
cd ffmpeg-5.1
./configure --enable-shared --enable-swscale --enable-gpl --enable-nonfree --enable-pic --prefix=/usr/local/ffmpeg --enable-version3 --enable-postproc --enable-pthreads --enable-static --enable-libx264 --enable-libmp3lame


  


  My questions :

  


  

  1. How to install ffmpeg with libx264

  


  2. How to cut video into fixed size with ffmpeg

  


  


• FFMPEG sendcmd command limitation

  18 novembre 2022, par Stahlauge

  i try to draw text into a video with drawtext and sendcmd.
In the sendcmd file there are over 9100 commands defined (each frame needs a different text).
All my commands are build this way.

  


  0 Parsed_drawtext_1 reinit 'text=\102030GA01, 102040Ap05
von oben, in Fließrichtung
[0,00]   17.11.2022 10\:22\:04:fontsize=28.928569157918293:y=5:x=0:fontcolor=#FFFFFF';
0.04 Parsed_drawtext_1 reinit 'text=\102030GA01, 102040Ap05
von oben, in Fließrichtung
[0,00]   17.11.2022 10\:22\:04:fontsize=28.928569157918293:y=5:x=0:fontcolor=#FFFFFF';
0.08 Parsed_drawtext_1 reinit 'text=\102030GA01, 102040Ap05
von oben, in Fließrichtung
[0,00]   17.11.2022 10\:22\:05:fontsize=28.928569157918293:y=5:x=0:fontcolor=#FFFFFF';


  


  My command is.

  


  ffmpeg.exe -y -i "17112022_102204.mp4" -vf "sendcmd=f=drawtextcommands.cmd,drawtext=fontfile='Ubuntu-L.ttf':text=:fontcolor=black@1.0:line_spacing=5, drawtext=fontfile='Ubuntu-L.ttf':text=:fontcolor=yellow@1.0:line_spacing=5,drawtext=fontfile='Ubuntu-L.ttf':text=:fontcolor=yellow@1.0:line_spacing=5,drawtext=fontfile='Ubuntu-L.ttf':text=:fontcolor=green@1.0:line_spacing=5" -c:v mpeg4 -qscale:v 5 -f mp4 "102030GA01_2022-11-17_10-21.mp4"


  


  My ffmpeg Version is n5.0.4 lgpl.
If i run this command with the sendcmd file on my develop laptop it works just fine (i7-10850H and 32GB RAM) but if i run the excat same on a Surface (i5-1035G4 and 8GB RAM) or Dell Latitude 5175 (Intel m5-6Y57 and 8GB RAM) i get an error

  


  [Parsed_sendcmd_0 @ 000002454188c540] No Targed specified in interval #XXXX, command #0 


  


  where XXXX is different each time i run it. All PC runs Win 10.

  


  I can´t really find the problem why i get this error on the tablets but not on my Laptop.
Maybe it´s a hardware ressource problem even FFMEG doesn´t have any requirements at all ?

  


  I only can get it to run on the tablets if i delete lots of commands from the sendcmd file.
I can´t define excatly the amount i need to delete because each run i can have more or less commands that are working.
But i can say i need to delete a lot more commands on the Dell tablet then on the Surface on to get it to run.