Recherche avancée

Sur d’autres sites (3861)

• ffmpeg wont "gracefully" terminate using q or kill -2

  24 mai 2023, par Jeff Thompson

  I am trying to run a bash command on Ubuntu to pull video from a stream and make an .mp4 with it. Here is the command I am using.

  


  ffmpeg -rtsp_transport tcp -i 'rtsp://username:password!@ipaddress/?inst=1' -c copy -f segment -segment_time 180 -reset_timestamps 1 ipaddress_day_3_2_%d.mp4

  


  It connects and begins copying the stream fine, the issue comes with trying to stop the process. It states press [q] to stop, which does not work. I have also tried kill -2 pid and kill -15 pid. Where pid is the process id. However kill -9 pid works and ctrl+c works. The issue with killing it this way is it corrupts the .mp4 rendering it useless. This is the error I get when using ctrl+c or kill -9.

  


  av_interleaved_write_frame(): Immediate exit requested   [segment @ 0x56337ec42980] Failure occurred when ending segment 'ipaddress_day_3_2_0.mp4' Error writing trailer of ipaddress_day_3_2_0%d.mp4: Immediate exit requested

  


  One thing to note is pressing [q] did work once, when I first started working on this but has not since.

  


  Thank You.

  


  I have tried kill -2 pid, kill -15 pid and [q], which I expected to "gracefully" terminate it.
kill -9 pid and ctrl+c will forcefully terminate it but corrupt the file.

  


• FFmpeg inaccurate outputs [duplicate]

  20 mai 2020, par Shlomi

  


  Possible Duplicate :
  
 ffmpeg : videos before and after conversion aren’t the same length

  


  





  Recently, I've been trying to use FFmpeg for an application which requires a VERY accurate manipulation when it comes to the time parameter (milliseconds resolution). Unfortunately, I was surprised to find out that FFmpeg's manipulation functionalities return some inaccurate results.

  



  Here is the output of 'ffmpeg' :

  



  ffmpeg version 0.11.1 Copyright (c) 2000-2012 the FFmpeg developers
  built on Jul 25 2012 19:55:05 with gcc 4.2.1 (Apple Inc. build 5664)
  configuration: --enable-gpl --enable-shared --enable-pthreads --enable-libx264 --enable-libmp3lame
  libavutil      51. 54.100 / 51. 54.100
  libavcodec     54. 23.100 / 54. 23.100
  libavformat    54.  6.100 / 54.  6.100
  libavdevice    54.  0.100 / 54.  0.100
  libavfilter     2. 77.100 /  2. 77.100
  libswscale      2.  1.100 /  2.  1.100
  libswresample   0. 15.100 /  0. 15.100
  libpostproc    52.  0.100 / 52.  0.100


  



  Now, let's assume I want to rip the audio track of 'foo.mov'. Here is the relevant output of 'ffmpeg -i foo.mov' :

  



  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'foo.mov':
  Metadata:
    major_brand     : qt  
    minor_version   : 0
    compatible_brands: qt  
    creation_time   : 2012-07-24 23:16:08
  Duration: 00:00:40.38, start: 0.000000, bitrate: 805 kb/s
    Stream #0:0(und): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p, 480x360, 733 kb/s, 24.46 fps, 29.97 tbr, 600 tbn, 1200 tbc
    Metadata:
      rotate          : 90
      creation_time   : 2012-07-24 23:16:08
      handler_name    : Core Media Data Handler
    Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, s16, 63 kb/s
    Metadata:
      creation_time   : 2012-07-24 23:16:08
      handler_name    : Core Media Data Handler


  



  As you probably noticed, the video file duration is 00:00:40.38. Using the following command, I ripped it's audio track :

  



  'ffmpeg -i foo.mov foo.wav'

  



  Output :

  



  Output #0, wav, to 'foo.wav':
  Metadata:
    major_brand     : qt  
    minor_version   : 0
    compatible_brands: qt  
    creation_time   : 2012-07-24 23:16:08
    encoder         : Lavf54.6.100
    Stream #0:0(und): Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, mono, s16, 705 kb/s
    Metadata:
      creation_time   : 2012-07-24 23:16:08
      handler_name    : Core Media Data Handler
Stream mapping:
  Stream #0:1 -> #0:0 (aac -> pcm_s16le)
Press [q] to stop, [?] for help
size=3482kB time=00:00:40.42 bitrate= 705.6kbits/s    
video:0kB audio:3482kB global headers:0kB muxing overhead 0.001290%


  



  As you can see, the output file is longer than the file in the input.

  



  Another example is audio (and video) file trimming :
Let's assume I would like to use ffmpeg for audio file trimming. I used the next command :

  



  'ffmpeg -t 00:00:10.000 -i foo.wav trimmed_foo.wav -ss 00:00:25.000'

  



  Output :

  



  [wav @ 0x10180e800] max_analyze_duration 5000000 reached at 5015510
Guessed Channel Layout for  Input Stream #0.0 : mono
Input #0, wav, from 'foo.wav':
  Duration: 00:00:40.42, bitrate: 705 kb/s
    Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, mono, s16, 705 kb/s
Output #0, wav, to 'trimmed_foo.wav':
  Metadata:
    encoder         : Lavf54.6.100
    Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, mono, s16, 705 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (pcm_s16le -> pcm_s16le)
    Press [q] to stop, [?] for help
size=864kB time=00:00:10.03 bitrate= 705.6kbits/s    
video:0kB audio:864kB global headers:0kB muxing overhead 0.005199%


  



  Again, the output file is 30 milliseconds longer than I expected.

  



  I tried, for a long time, to research the issue without any success. When I use audacity for the same functionality, it does it very accurately !

  



  Does anyone have any idea how to solve this problem ?

  


• FFmpeg - filter_complex error,Too many inputs specified for the "scale" filter

  20 septembre 2018, par wensefu

  I’m trying to concat some video into one single video using ffmpeg. here’s my ffmpeg cmd :

  ffmpeg -i input1.avi -i input2.mkv -filter_complex [0:v]scale=1920:1080:force_original_aspect_ratio=decrease,pad=1920:1080:(ow-iw)/2:(oh-ih)/2[v0];[v0][0:a][1:v]scale=1920:1080:force_original_aspect_ratio=decrease,pad=1920:1080:(ow-iw)/2:(oh-ih)/2[v1];[v1][1:a]concat=n=2:v=1:a=1[outv][outa] -map [outv] -map [outa] -vcodec libx264 -crf 27 -preset ultrafast out.mp4 

  but got error :

  [AVFilterGraph @ 0xd177f500] Too many inputs specified for the "scale" filter.
  
  E AVLOG   : Error initializing complex filters.
  
  E AVLOG   : Invalid argument
  
  E AVLOG   : At least one output file must be specified
  
  I AVLOG   : Stream mapping:
  
  I AVLOG   : Press [q] to stop, [?] for help
  
  I AVLOG   : No more output streams to write to, finishing.
  
  E AVLOG   : 
  
  F libc    : Fatal signal 11 (SIGSEGV), code 1, fault addr 0x0 in tid 17256 (IntentService[v)

  Any ideas anyone ?

  Many thanks in advance.