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• Not able to change the program number for the video

  17 mai 2018, par C.B. Akshay Kumar

  I have been trying to change the program number of a particular .ts file using FFmpeg without any success. I saw the documentation and it mentions to use the -program option. But, I am not able to add the streams as I desire. Here’s the program information for the stream that I possess currently :

  Input #0, mpegts, from 'output_2_without_pgm_num.ts':
  
    Duration: 00:01:49.92, start: 1.400000, bitrate: 1816 kb/s
  
    Program 1
  
      Metadata:
  
    service_name    : Service01
  
    service_provider: FFmpeg
  
  Stream #0:0[0x100]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, progressive), 720x576 [SAR 64:45 DAR 16:9], 25 fps, 25 tbr, 90k tbn, 50 tbc
  
  Stream #0:1[0x101](ger): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, fltp, 384 kb/s (clean effects)
  
  Stream #0:2[0x102](eng): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, fltp, 384 kb/s (clean effects)
  
  Stream #0:3[0x103](ger): Subtitle: dvb_teletext ([6][0][0][0] / 0x0006)

  Now, I want to change the program number from 1 to 22. Any idea how I could do that ? I have tried using -program option, but I can’t add streams 2 and 3 to the newly created .ts file.

  Thanks in advance !

• I need to use SOX or similar To SPIT AUDIO with a specific given duration

  28 mai 2019, par PierDEVIT

  I need to use SOX or similar To SPIT AUDIO given a specific duration

  Duration : 1 minute, this is the limit : I need this for transcribing the audio with Google Speech-To-Text

  this is the main code that I had seen in the StackOverflow’s platform. It isn’t the final code but the house code :

  https://unix.stackexchange.com/questions/99182/sox-splitting-audio-on-silence-but-leaving-tails

  Code :

  sox STE-000.wav  out.wav silence 1 0.5 1% 1 1.0 1% : newfile : restart

  Sentence-Recognition It’s a dream ! I but I can be satisfied with this method !

  Thank in advice

• lavf : deprecate av_stream_get_end_pts()

  17 août 2022, par Anton Khirnov

  lavf : deprecate av_stream_get_end_pts()
  According to its documentation it returns "pts of the last muxed packet
  
  + its duration", but the value it actually returns right now is
  
  (possibly guessed) dts after muxer-internal bitstream filtering (if
  
  any).
  This function was added for ffmpeg.c, but it is not used there anymore.
  
  Since the value it returns is ill-defined and so inappropriate for any
  
  serious use, deprecate it.
  

  • [DH] doc/APIchanges
  • [DH] libavformat/avformat.h
  • [DH] libavformat/mux_utils.c
  • [DH] libavformat/version_major.h