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• Correct two errors in patch for Trac #1486 :

  18 juin 2014, par Monty

  Correct two errors in patch for Trac #1486 :
  1) vf->offset should not have been overridden in new front-of-stream case
  
  2) missing status output in seeking_example.c
  git-svn-id : http://svn.xiph.org/trunk/vorbis@19164 0101bb08-14d6-0310-b084-bc0e0c8e3800
  

  • [DH] examples/seeking_example.c
  • [DH] lib/vorbisfile.c

• Python subprocess will not run command [duplicate]

  15 février 2024, par confused

  For some reason I have a subprocess command line that is not running the subprocess command line underneath it and doing the processing it should be.

  


   import subprocess
 import os

 os.chdir('/home/linux/Trial/')
 a = open('Attempts.txt', 'r')
 b = a.readlines()
 a.close()
 for c in range(0, len(b)-1):
     words = list(b[c].split(" "))
     d = len(words)
     e = words[d-1]
     f = b[c].replace(e, 'Hiccup' + str(c) + '.mp4')
     words[d-1] = 'Hiccup' + str(c) + '.mp4'
     print(f)
     command = 'ffmpeg', '-i', words[2], '-ss', words[4], '-to', words[6], '-c:v copy -a copy', words[11]
     print(command)
     subprocess.run(['ffmpeg', '-i', words[2], '-ss', words[4], '-to', words[6], '-c:v copy -a copy', words[11]])   


  


  When I run the following code I get the following output :

  


   ffmpeg -i test.mp4 -ss 00:00:00 -to 00:02:34 -c:v copy -a copy Hiccup0.mp4
 ('ffmpeg', '-i', 'test.mp4', '-ss', '00:00:00', '-to', '00:02:34', '-c:v copy -a copy', 'Hiccup0.mp4')


  


  I get nothing else. When I check no new file has been created called Hiccup0. I have ffmpeg-python installed and updated(made sure of that this morning).

  


  What gives. I see this should work but it doesn't.

  


  Edit :

  


  I decided to try running the subprocess statement in interpretter instead of through the program only. When I run :

  


   subprocess.run('ffmpeg', '-i', 'SR0.mp4', '-ss', '0', '-to', '82', '-c:v', 'copy' ,'-a', 'copy', 'help.mp4')


  


  I get the error, bufsize must be an integer. I still ask the same question, what gives ? I tried changing everything over to seconds from minutes and hours to make it a digit, as can be seen from the above line, but it still won't work correctly. At least I'm getting an error now, much than just not having it run at all.

  


  I also just tried to put an f into front of 'ffmpeg ; and it still gave the same error.

  


• avformat/matroskaenc : Don't write \0 unnecessarily

  8 août 2023, par Andreas Rheinhardt

  avformat/matroskaenc : Don't write \0 unnecessarily
  Writing the duration SimpleTag is special : It's size is
  
  reserved in advance via an EBML Void element (if seekable)
  
  and this reserved space is overwritten when writing the trailer ;
  
  it does not use put_ebml_string().
  The string to write is created via snprintf on a buffer
  
  of size 20 ; this buffer is then written via put_ebml_binary()
  
  with a size of 20.
  EBML strings need not be zero-terminated ; if not, they
  
  are implicitly terminated by the element's length field.
  
  snprintf() always zero-terminates the buffer, i.e.
  
  the last byte can be discarded when using an EBML string.
  
  This patch does this.
  The FATE changes are as expected : One byte saved for every
  
  track ; the only exception is the matroska-qt-mode test :
  
  An additional byte is saved because an additional byte
  
  could be saved from the enclosing Tags length field.
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavformat/matroskaenc.c
  • [DH] tests/ref/fate/aac-autobsf-adtstoasc
  • [DH] tests/ref/fate/matroska-alac-remux
  • [DH] tests/ref/fate/matroska-avoid-negative-ts
  • [DH] tests/ref/fate/matroska-dovi-write-config7
  • [DH] tests/ref/fate/matroska-dovi-write-config8
  • [DH] tests/ref/fate/matroska-dvbsub-remux
  • [DH] tests/ref/fate/matroska-encoding-delay
  • [DH] tests/ref/fate/matroska-flac-extradata-update
  • [DH] tests/ref/fate/matroska-h264-remux
  • [DH] tests/ref/fate/matroska-hdr10-plus-remux
  • [DH] tests/ref/fate/matroska-mastering-display-metadata
  • [DH] tests/ref/fate/matroska-move-cues-to-front
  • [DH] tests/ref/fate/matroska-mpegts-remux
  • [DH] tests/ref/fate/matroska-ms-mode
  • [DH] tests/ref/fate/matroska-ogg-opus-remux
  • [DH] tests/ref/fate/matroska-opus-remux
  • [DH] tests/ref/fate/matroska-pgs-remux
  • [DH] tests/ref/fate/matroska-pgs-remux-durations
  • [DH] tests/ref/fate/matroska-qt-mode
  • [DH] tests/ref/fate/matroska-spherical-mono-remux
  • [DH] tests/ref/fate/matroska-vp8-alpha-remux
  • [DH] tests/ref/fate/matroska-zero-length-block
  • [DH] tests/ref/fate/rgb24-mkv
  • [DH] tests/ref/fate/shortest-sub
  • [DH] tests/ref/fate/webm-av1-extradata-update
  • [DH] tests/ref/fate/webm-dash-chapters
  • [DH] tests/ref/fate/webm-hdr10-plus-remux
  • [DH] tests/ref/fate/webm-webvtt-remux
  • [DH] tests/ref/lavf-fate/av1.mkv
  • [DH] tests/ref/lavf/mka
  • [DH] tests/ref/lavf/mkv
  • [DH] tests/ref/lavf/mkv_attachment
  • [DH] tests/ref/seek/lavf-mkv