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• How to generate m3e8 file from mp4 files (Not from list)

  4 août 2019, par David Najaryan

  I need to generate m3e8 file from mp4 videos

  I have code to do it

  ffmpeg -i "D:/12.mp4" -profile:v baseline -level 3.0 -s 640x360 - 
  
  start_number 0 -hls_time 10 -hls_list_size 0 -f hls -hls_flags append_list 
  
  "D:/testff/index.m3e8"

  But when i run script to stream this file to facebook i get many errors

  ffmpeg -re -i "D:/testff/index.m3e8" -acodec libmp3lame -ar 44100 -b:a 
  
  128k -pix_fmt yuv420p -profile:v baseline -s 426x240 -bufsize 6000k -vb 
  
  400k -maxrate 1500k -deinterlace -vcodec libx264 -preset veryfast -g 30 -r 
  
  30 -f flv "rtmps://live-api-s.facebook.com:443/rtmp/1370514463086508? 
  
  s_bl=1&s_ps=1&s_sml=0&s_sw=0&s_vt=api-s&a=AbwMpTgugervvv6i"

  P.S. I need to dynamically add video files

  Thanks

• Batch File With FFmpeg Command to Concat Multiple Video Files With Different Codecs

  19 juillet 2019, par WizardKhalifard

  I am trying to create a .bat file that will combine all of the videos in the current folder into one MP4 video. The thing is, the frame size and frame rate are different in every video.

  I currently have the code setup to pick up all MP4 file names in the current folder, send the names to list.txt, then from list.txt it will combine the files into one.

  The problem is the codecs of each video are different and corrupt the output video.

  My current code is below :

  set ffmpeg="C:\ffmpeg\bin\ffmpeg.exe"
  
  (for %%i in (*.mp4) do @echo file '%%i') > list.txt
  
  %ffmpeg% -f concat -i list.txt -c copy output.mp4
  
  del list.txt
  
  pause

  Any ideas on how to do this ?

  I am thinking that if there could be a way to make the output video based on the codecs of the first video in the list then that might work.

• Concatenate 2 mp4 video files but the second file is without PPS

  30 juin 2019, par Trying_To_Understand

  I started my recording from my Hikvision DVR and he produce me two mp4 files (because there is a memory limit on one file - 1 gb). Now I want to concatenate these two video files together. The problem is in the second file, it’s missing PPS information.

  When I run this command in ffmpeg :

  ffmpeg -i file1.mp4 -i file2.mp4  
  
         -filter_complex "[0:v] [0:a] [1:v] [1:a] [2:v] [2:a] concat=n=3:v=1:a=1 [v] [a]"   
  
         -map "[v]" -map "[a]" final.mp4

  The video and the sound of the first file is in good quality but when the first file is finished there the sound quality of the second video is very bad (sometimes the player throws an error).

  When I ran ffprobe file2.mp4 on the second file, this is the result :

  [NULL @ 000001d2f8b060c0] non-existing PPS 0 referenced
  
  [h264 @ 000001d2f8b060c0] non-existing PPS 0 referenced
  
  [h264 @ 000001d2f8b060c0] decode_slice_header error
  
  [h264 @ 000001d2f8b060c0] no frame!
  
  [h264 @ 000001d2f8b060c0] non-existing PPS 0 referenced
  
  Input #0, mpeg, from '150_2.mp4':
  
  Duration: 00:50:51.75, start: 13182.386222, bitrate: 983 kb/s
  
  Stream #0:0[0x1e0]: Video: h264 (High), yuv420p(progressive), 1280x720, 25 
  
  fps, 25 tbr, 90k tbn, 50 tbc
  
  Stream #0:1[0x1c0]: Audio: pcm_alaw, 8000 Hz, mono, s16, 64 kb/s

  Compare to the first file :

  Input #0, mpeg, from '150.mp4':
  
  Duration: 02:17:20.29, start: 91818.852978, bitrate: 1042 kb/s
  
  Stream #0:0[0x1e0]: Video: h264 (High), yuv420p(progressive), 1280x720, 25 
  
  fps, 25 tbr, 90k tbn, 50 tbc
  
  Stream #0:1[0x1c0]: Audio: pcm_mulaw, 8000 Hz, mono, s16, 64 kb/s

  You can see that the audio type has changed for some reason.

  Are there any solutions for this problem ?