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• How to re-multiplex Multiple Program Transport Stream (MPTS) files into a single TS ?

  30 novembre 2017, par rantsh

  I have multiple MPTS files recorded from satellite receivers, I need to cherry pick programs/services/PIDS from each file re-multiplex them into a single MPTS file. Optionally I might be able to get away with taking all the services from every file and adding them to the final MPTS (In case anyone knows about a multiplexer that wouldn’t allow me to cherry pick programs)

  Does anybody know how to do this with open source or free software (like VLC or ffmpeg for example) under either windows or linux ?

• ffmpeg - merge mp3 and mp4 (duration difference)

  8 décembre 2017, par dfionov

  I’m trying to merge mp4 and mp3 files with ffmpeg.
  mp4 duration - 9.800 sec, mp3 - 58.540 sec. So i using -shortest key.
  Code :

  ffmpeg -i video.mp4 -i audio.mp3 -c:v libx264 -c:a aac -strict experimental -shortest output.mp4

  After that i got output.mp4 with duration 9.846. Where is my error ? Why output video longer than source ? (9.846 sec and 9.800 sec).

  Source mp4 MediaInfo :

  General
  
  Complete name                  : F:\video test\video.mp4
  
  Format                         : MPEG-4
  
  Format profile                 : Base Media
  
  Codec ID                       : iso5 (iso5/dash)
  
  File size                      : 3.19 MiB
  
  Duration                       : 9 s 800 ms
  
  Overall bit rate               : 2 732 kb/s
  
  Encoded date                   : UTC 2017-11-24 20:53:53
  
  Tagged date                    : UTC 2017-11-24 20:53:53
  
  
  
  Video
  
  ID                             : 1
  
  Format                         : AVC
  
  Format/Info                    : Advanced Video Codec
  
  Format profile                 : High@L3.1
  
  Format settings                : CABAC / 4 Ref Frames
  
  Format settings, CABAC         : Yes
  
  Format settings, ReFrames      : 4 frames
  
  Codec ID                       : avc1
  
  Codec ID/Info                  : Advanced Video Coding
  
  Duration                       : 9 s 800 ms
  
  Bit rate                       : 2 729 kb/s
  
  Maximum bit rate               : 3 766 kb/s
  
  Width                          : 1 280 pixels
  
  Height                         : 720 pixels
  
  Display aspect ratio           : 16:9
  
  Frame rate mode                : Constant
  
  Frame rate                     : 25.000 FPS
  
  Color space                    : YUV
  
  Chroma subsampling             : 4:2:0
  
  Bit depth                      : 8 bits
  
  Scan type                      : Progressive
  
  Bits/(Pixel*Frame)             : 0.118
  
  Stream size                    : 3.19 MiB (100%)
  
  Writing library                : x264 core 146
  
  Encoding settings              : 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=12 / lookahead_threads=2 / 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
  
  Tagged date                    : UTC 2017-11-24 20:53:53

  Source mp3 Mediainfo :

  General
  
  Complete name                  : F:\video test\audio.mp3
  
  Format                         : MPEG Audio
  
  File size                      : 1.19 MiB
  
  Duration                       : 58 s 540 ms
  
  Overall bit rate mode          : Variable
  
  Overall bit rate               : 170 kb/s
  
  Writing library                : LAME3.99r
  
  
  
  Audio
  
  Format                         : MPEG Audio
  
  Format version                 : Version 1
  
  Format profile                 : Layer 3
  
  Format settings                : Joint stereo / MS Stereo
  
  Duration                       : 58 s 540 ms
  
  Bit rate mode                  : Variable
  
  Bit rate                       : 170 kb/s
  
  Minimum bit rate               : 32.0 kb/s
  
  Channel(s)                     : 2 channels
  
  Sampling rate                  : 44.1 kHz
  
  Frame rate                     : 38.281 FPS (1152 SPF)
  
  Compression mode               : Lossy
  
  Stream size                    : 1.19 MiB (100%)
  
  Writing library                : LAME3.99r
  
  Encoding settings              : -m j -V 2 -q 0 -lowpass 18.5 --vbr-new -b 32

  Console output :

  ffmpeg version 3.4 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with gcc 7.2.0 (GCC)
  
    configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-bzlib --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-cuda --enable-cuvid --enable-d3d11va --enable-nvenc --enable-dxva2 --enable-avisynth --enable-libmfx
  
    libavutil      55. 78.100 / 55. 78.100
  
    libavcodec     57.107.100 / 57.107.100
  
    libavformat    57. 83.100 / 57. 83.100
  
    libavdevice    57. 10.100 / 57. 10.100
  
    libavfilter     6.107.100 /  6.107.100
  
    libswscale      4.  8.100 /  4.  8.100
  
    libswresample   2.  9.100 /  2.  9.100
  
    libpostproc    54.  7.100 / 54.  7.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'video.mp4':
  
    Metadata:
  
      major_brand     : iso5
  
      minor_version   : 1
  
      compatible_brands: iso5dash
  
      creation_time   : 2017-11-24T20:53:53.000000Z
  
    Duration: 00:00:09.80, start: 0.000000, bitrate: 2732 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 2259 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
  Input #1, mp3, from 'audio.mp3':
  
    Duration: 00:00:58.54, start: 0.025057, bitrate: 170 kb/s
  
      Stream #1:0: Audio: mp3, 44100 Hz, stereo, s16p, 170 kb/s
  
      Metadata:
  
        encoder         : LAME3.99r
  
      Side data:
  
        replaygain: track gain - -2.200000, track peak - unknown, album gain - unknown, album peak - unknown, 
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  
    Stream #1:0 -> #0:1 (mp3 (native) -> aac (native))
  
  Press [q] to stop, [?] for help
  
  [libx264 @ 00000000005ab440] using SAR=1/1
  
  [libx264 @ 00000000005ab440] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
  
  [libx264 @ 00000000005ab440] profile High, level 3.1
  
  [libx264 @ 00000000005ab440] 264 - core 152 r2851 ba24899 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - 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=6 lookahead_threads=1 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
  
  Output #0, mp4, to 'output.mp4':
  
    Metadata:
  
      major_brand     : iso5
  
      minor_version   : 1
  
      compatible_brands: iso5dash
  
      encoder         : Lavf57.83.100
  
      Stream #0:0(und): Video: h264 (libx264) (avc1 / 0x31637661), yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
        encoder         : Lavc57.107.100 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
      Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s
  
      Metadata:
  
        encoder         : Lavc57.107.100 aac
  
      Side data:
  
        replaygain: track gain - -2.200000, track peak - unknown, album gain - unknown, album peak - unknown, 
  
  frame=   54 fps=0.0 q=28.0 size=       0kB time=00:00:00.04 bitrate=   8.3kbits/s speed=0.0927x    
  
  frame=   80 fps= 80 q=28.0 size=       0kB time=00:00:01.09 bitrate=   0.4kbits/s speed=1.09x    
  
  frame=   98 fps= 65 q=28.0 size=     256kB time=00:00:01.83 bitrate=1143.5kbits/s speed=1.21x    
  
  frame=  119 fps= 59 q=28.0 size=     512kB time=00:00:02.67 bitrate=1570.9kbits/s speed=1.32x    
  
  frame=  144 fps= 56 q=28.0 size=     768kB time=00:00:03.66 bitrate=1715.0kbits/s speed=1.42x    
  
  frame=  167 fps= 52 q=28.0 size=    1024kB time=00:00:04.57 bitrate=1833.9kbits/s speed=1.44x    
  
  frame=  190 fps= 51 q=28.0 size=    1280kB time=00:00:05.50 bitrate=1905.5kbits/s speed=1.47x    
  
  frame=  218 fps= 51 q=28.0 size=    1792kB time=00:00:06.64 bitrate=2210.6kbits/s speed=1.56x    
  
  frame=  242 fps= 50 q=28.0 size=    2048kB time=00:00:07.56 bitrate=2216.4kbits/s speed=1.58x    
  
  frame=  245 fps= 41 q=-1.0 Lsize=    3045kB time=00:00:09.82 bitrate=2539.6kbits/s speed=1.65x    
  
  video:2880kB audio:156kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.298058%
  
  [libx264 @ 00000000005ab440] frame I:14    Avg QP:20.01  size: 39750
  
  [libx264 @ 00000000005ab440] frame P:106   Avg QP:23.85  size: 14578
  
  [libx264 @ 00000000005ab440] frame B:125   Avg QP:24.63  size:  6770
  
  [libx264 @ 00000000005ab440] consecutive B-frames: 22.9% 22.0% 15.9% 39.2%
  
  [libx264 @ 00000000005ab440] mb I  I16..4: 16.7% 80.3%  3.0%
  
  [libx264 @ 00000000005ab440] mb P  I16..4: 10.2% 36.2%  1.1%  P16..4: 25.0%  7.9%  2.5%  0.0%  0.0%    skip:17.1%
  
  [libx264 @ 00000000005ab440] mb B  I16..4:  2.3%  5.8%  0.2%  B16..8: 31.4%  6.5%  0.9%  direct: 3.7%  skip:49.2%  L0:51.8% L1:44.5% BI: 3.7%
  
  [libx264 @ 00000000005ab440] 8x8 transform intra:76.1% inter:86.3%
  
  [libx264 @ 00000000005ab440] coded y,uvDC,uvAC intra: 38.3% 52.1% 9.0% inter: 12.3% 20.1% 0.2%
  
  [libx264 @ 00000000005ab440] i16 v,h,dc,p: 30% 28%  9% 33%
  
  [libx264 @ 00000000005ab440] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 36% 23% 19%  3%  3%  4%  4%  4%  4%
  
  [libx264 @ 00000000005ab440] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 33% 21% 14%  5%  7%  7%  6%  5%  3%
  
  [libx264 @ 00000000005ab440] i8c dc,h,v,p: 45% 24% 25%  6%
  
  [libx264 @ 00000000005ab440] Weighted P-Frames: Y:13.2% UV:6.6%
  
  [libx264 @ 00000000005ab440] ref P L0: 71.7% 12.5% 12.9%  2.7%  0.2%
  
  [libx264 @ 00000000005ab440] ref B L0: 92.8%  6.3%  0.9%
  
  [libx264 @ 00000000005ab440] ref B L1: 98.3%  1.7%
  
  [libx264 @ 00000000005ab440] kb/s:2406.56
  
  [aac @ 00000000005adde0] Qavg: 511.420

  ffprobe -show_packets output too big, so I loaded to pastebin
  https://pastebin.com/TYSMdceS

• How do I properly enable ffmpeg for matplotlib.animation ?

  7 mars 2017, par spanishgum

  I have covered a lot of ground on stack so far trying to get ffmpeg going so I can make a timelapse video.

  I am on a CentOS 7 machine, running python3.7.0a0.

  python3
  
  >>> import numpy as np
  
  >>> np.__version__
  
  '1.12.0'
  
  >>> import matplotlib as mpl
  
  >>> mpl.__version__
  
  '2.0.0'
  
  >>> import mpl_toolkits.basemap as base
  
  >>> base.__version__
  
  '1.0.7'

  I found this github gist on installing ffmpeg. I used the chromium source, and installed without a prefix option (using the default).

  I have confirmed that ffmpeg is installed, although I don’t know anything about testing whether it works.

  which ffmpeg
  
  /usr/local/bin/ffmpeg
  
  
  
  ffmpeg -version
  
  ffmpeg version N-83533-gada281d Copyright (c) 2000-2017 the FFmpeg dev elopers
  
  built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-11
  
  configuration:
  
  libavutil      55. 47.100 / 55. 47.100
  
  libavcodec     57. 80.100 / 57. 80.100
  
  libavformat    57. 66.102 / 57. 66.102
  
  libavdevice    57.  2.100 / 57.  2.100
  
  libavfilter     6. 73.100 /  6. 73.100
  
  libswscale      4.  3.101 /  4.  3.101
  
  libswresample   2.  4.100 /  2.  4.100

  I tried to run a few sample examples I found online :

  [1] http://matplotlib.org/examples/animation/basic_example_writer.html

  [2] http://stackoverflow.com/a/23098090/3454650

  Everything works fine up until I try to save the animation file.

  [1]

   anim.save('basic_animation.mp4', writer = FFwriter, fps=30, extra_args=['-vcodec', 'libx264'])

  [2]

  im_ani.save('im.mp4', writer=writer)

  I found here that explictly setting the path to ffmpeg might be necessary so I added this to the top of the test scripts :

  plt.rcParams['animation.ffmpeg_path'] = '/usr/local/bin/ffmpeg'

  I tried a few more tweaks in the code but always get the same response, which I do not know how to begin deciphering :

  Traceback (most recent call last):
  
    File "testanim.py", line 27, in <module>
  
      writer.grab_frame()
  
    File "/usr/local/lib/python3.7/contextlib.py", line 100, in __exit__
  
      self.gen.throw(type, value, traceback)
  
    File "/usr/local/lib/python3.7/site-packages/matplotlib/animation.py", line 256, in saving
  
      self.finish()
  
    File "/usr/local/lib/python3.7/site-packages/matplotlib/animation.py", line 276, in finish
  
      self.cleanup()
  
    File "/usr/local/lib/python3.7/site-packages/matplotlib/animation.py", line 311, in cleanup
  
      out, err = self._proc.communicate()
  
    File "/usr/local/lib/python3.7/subprocess.py", line 836, in communicate
  
      stdout, stderr = self._communicate(input, endtime, timeout)
  
    File "/usr/local/lib/python3.7/subprocess.py", line 1474, in _communicate
  
      selector.register(self.stdout, selectors.EVENT_READ)
  
    File "/usr/local/lib/python3.7/selectors.py", line 351, in register
  
      key = super().register(fileobj, events, data)
  
    File "/usr/local/lib/python3.7/selectors.py", line 237, in register
  
      key = SelectorKey(fileobj, self._fileobj_lookup(fileobj), events, data)
  
    File "/usr/local/lib/python3.7/selectors.py", line 224, in _fileobj_lookup
  
      return _fileobj_to_fd(fileobj)
  
    File "/usr/local/lib/python3.7/selectors.py", line 39, in _fileobj_to_fd
  
      "{!r}".format(fileobj)) from None
  
  ValueError: Invalid file object: &lt;_io.BufferedReader name=6>
  
  </module>

  Is there something with my configuration that is malformed ? I searched google for this error for some time but never found anything relevant to animations / ffmpeg. Any help would be greatly appreciated.

  ---

  UPDATE :

  @LordNeckBeard pointed me here : https://trac.ffmpeg.org/wiki/CompilationGuide/Centos

  I ran into problems with installing the x264 encoding dependency. Some files in libavcodec/*.c (in the make output) were reporting undefined references to several functions. After a wild goose chase found this : https://mailman.videolan.org/pipermail/x264-devel/2015-February/010971.html

  To fix the x264 installation, I simply added some configure flags :

  ./configure --enable-static --enable-shared --extra-ldflags="-lswresample -llzma"

  ---

  UPDATE :

  So everything installed fine after fixing the libx264 problems. I went ahead and copied the ffmpeg binary from the ffmpeg_build folder into /usr/local/bin/ffmpeg.

  After running the script I was getting problems where ffmpeg could not find the libx264 shared object. I think I will have to recompile everything using different prefixes. My intuition tells me there are old files laying around after I have messed with everything, using some configuration that is broken.

  So I decided maybe I should just try to use NUX : http://linoxide.com/linux-how-to/install-ffmpeg-centos-7/
  I installed ffmpeg using the new rpm, but to no avail. I still was not able to run ffmpeg because of a missing shared object.

  Finally, instead of usiong files copied into my /usr/local/bin folder, I ran ffmpeg directly from the build bin directory. Turns out that this does work properly !

  So in essence, if I want to install ffmpeg system wide, I need to manually compile from sources again but using a nonlocal prefix.