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• whether it takes long time for convert flv to MP4 using ffmpeg from server

  29 décembre 2016, par Firman Firdaus

  I want to convert a flv file to mp4. I use with a basic command like this :

  ffmpeg -i /var/www/html/rawmedia/d2cb9f152f27d9beb4a15d61e177fa22.flv /var/www/html/media/new.mp4

  The command above has result 0 B mp4.
  I read for My reference for this in this link,
  there is a very simple and basic I think.
  So I try the command above for testing php vibe command like this :

  ffmpeg -i /var/www/html/rawmedia/d2cb9f152f27d9beb4a15d61e177fa22.flv -vcodec libx264 -s 640x360 -threads 4 -movflags faststart /var/www/html/media/test4.mp4

  I got that command from PHPVIBE for convert other format file except mp4.
  So I got a result just the same as like first command that still 0 B mp4.
  But the Output of the second command give me like this

  Incompatible sample format 's16' for codec 'aac', auto-selecting format 'flt'
  
  [libx264 @ 0xcebde0] using cpu capabilities: none!
  
  [libx264 @ 0xcebde0] profile High, level 3.0
  
  [libx264 @ 0xcebde0] 264 - core 120 r2151 a3f4407 - H.264/MPEG-4 AVC codec - Copyleft 2003-2011 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=4 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  [NULL @ 0xd5f1a0] Codec is experimental but experimental codecs are not enabled, see -strict -2
  
  Output #0, mp4, to '/var/www/html/media/test4.mp4':
  
    Metadata:
  
      starttime       : 0
  
      totalduration   : 57
  
      totaldatarate   : 353
  
      bytelength      : 2535814
  
      canseekontime   : true
  
      sourcedata      : B0AFCE7F5HH1428394559963956
  
      purl            :
  
      pmsg            :
  
      Stream #0:0: Video: h264, yuv420p, 640x360, q=-1--1, 90k tbn, 30 tbc
  
      Stream #0:1: Audio: none, 22050 Hz, stereo, flt, 128 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (flv -> libx264)
  
    Stream #0:1 -> #0:1 (mp3 -> aac)
  
  Error while opening encoder for output stream #0:1 - maybe incorrect parameters such as bit_rate, rate, width or height

  Output give me some information that test.mp4 have bytelength      : 2535814.
  But I still have 0B mp4 converted result until now. Is there taking a time or I was wrong with the command. But especially my first command very basic and still get zero byte result.

• Having trouble streaming video with FFmpeg over TCP on Windows [closed]

  8 mars 2024, par Tharunkumar Ampolu

  I'm trying to stream a video using FFmpeg over TCP on a Windows system. I'm using the following command

  


  ffmpeg -i video.mp4 -f mpegts tcp://192.168.24.3:2000?listen



  


  However, I encounter the following errors :

  


  Error opening output tcp ://192.168.24.3:2000 ?listen : Error number -10049 occurred
Error opening output file tcp ://192.168.24.3:2000 ?listen.
Error opening output files : Error number -10049 occurred

  


  I attempted to stream the video using the specified FFmpeg command.
I provided the command and the input file (video.mp4).
However, the command resulted in errors related to opening the output file for streaming.

  


  I expected the FFmpeg command to successfully stream the video over TCP to the specified address and port (192.168.24.3:2000).
I expected the command to run without errors and for the video stream to be accessible at the specified destination.

  


• Passing arguments to FFMPEG using subprocess.call()

  8 mai 2018, par Peter F

  I was working through this answer to an FFMPEG question and the command works just fine through the Windows 10 command prompt (I’ve only changed the input and output filenames) :

  ffmpeg -i test.mp4  -filter:v "select='gt(scene,0.4)',showinfo" -f null  - 2> test.txt

  My Python 3 script gives arguments (as a list) to the subprocess.call() function and works fine for a number of basic FFMPEG operations, but not this one ! It seems to be failing at the final null - 2> test.txt part, with the following error messages depending on how I split the arguments :

  [NULL @ 000001c7e556a3c0] [error] Unable to find a suitable output format for 'pipe:'
  
  [error] pipe:: Invalid argument
  
  
  
  [error] Unrecognized option '2> test.txt'.
  
  [fatal] Error splitting the argument list: Option not found
  
  
  
  [error] Unrecognized option '2>'.
  
  [fatal] Error splitting the argument list: Option not found

  Here’s the basic list of arguments I’ve been trying :

  args=['C:\\Program Files\\ffmpeg\\ffmpeg.exe',
  
        '-i',
  
        'test.mp4',
  
        '-filter:v "select=\'gt(scene,0.4)\',showinfo"',
  
        '-f null',
  
        '-',
  
        '2>',
  
        'test.txt']

  Plus various permutations combining and splitting the last few elements.

  Please could somebody help me with the right syntax for running FFMPEG with these arguments through Python 3 ?

  Many thanks - I just can’t see where I’m going wrong :(