Changes between Initial Version and Version 1 of Ticket #3829


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Timestamp:
Aug 6, 2014, 5:05:47 PM (12 years ago)
Author:
Carl Eugen Hoyos
Comment:

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  • Ticket #3829

    • Property Keywords atempo added
    • Property Reproduced by developer set
    • Property Status new → open
    • Property Version unspecified → git-master

  • Ticket #3829 – Description

    initial v1  
    11The following command line with a file containein two click sounds (one in the beginning, the other right before the end) demonstrates the problem:
    2 
     2{{{
    33ffmpeg -i two-clicks.wav -af "atempo=0.5" -acodec pcm_s16le two-clicks-half-speed.wav
    44ffmpeg version N-65311-g6f3e15a Copyright (c) 2000-2014 the FFmpeg developers
    … …  
    2828size=     168kB time=00:00:01.95 bitrate= 705.9kbits/s   
    2929video:0kB audio:168kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.045340%
    30 
     30}}}
    3131Then checking the output shows the file is 0.05 seconds too short:
    32 
     32{{{
    3333ffmpeg -i two-clicks-half-speed.wav
    3434ffmpeg version N-65311-g6f3e15a Copyright (c) 2000-2014 the FFmpeg developers
    … …  
    5050    Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, 1 channels, s16, 705 kb/s
    5151At least one output file must be specified
    52 
     52}}}
    5353And looking at the file in a wave editor (and listening to it), you see/hear that the second click was cut off.