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  • Changing video resolution is changing the duration of the output video the input video

    4 septembre 2017, par Sean

    I am trying to change the video resolution on a few videos as well as the frame rate using FFMPEG. I am attempting to copy the original video/audio and change the output video to have a constant frame rate and different resolution.

    Here is the command line I execute :

    `ffmpeg -i "input_video_here" -s 854x480 -c:v libx264 -preset slow -crf 18 -r 30 -refs 3 -movflags +faststart -c:a copy "#{output_video_here}"`

    When I compare the input video with the output video, my output videos are getting cut. The duration of my output video is 51 seconds and my input is 5 minutes. Is something in my ffmpeg command causing my output video to clip ?

  • How does CMP pass comparison value to the next line in a bash script ?

    22 août 2015, par Tandy Freeman

    I want to compare the output of two framemd5 (decoded md5 of every video frame) digests.
    http://stackoverflow.com/a/12736416/2188572

    The cmp script works perfectly for me.
    I know next to nothing about coding, so I want to educate myself on what’s happening, and I can’t figure out from SO or googling.

    It seems like the script should require more input from me, like I should have to stipulate(apologies for awful pseudo code)

    cmp file1 file 2
    
if cmp produces a difference;then
    
else

    It seems that just entering "if cmp file1 file 2" automatically produced the equivalent of a YES or NO and stores that info for the then, else etc ?

  • Revision fcb4253c9c : update libyuv to r1456 picks up build warning fixes for visual studio 2015 Cha

    25 juillet 2015, par James Zern

    Changed Paths :
     Modify /examples.mk


     Modify /third_party/libyuv/README.libvpx


     Modify /third_party/libyuv/include/libyuv/convert.h


     Modify /third_party/libyuv/include/libyuv/convert_argb.h


     Modify /third_party/libyuv/include/libyuv/convert_from.h


     Modify /third_party/libyuv/include/libyuv/convert_from_argb.h


     Modify /third_party/libyuv/include/libyuv/planar_functions.h


     Add /third_party/libyuv/include/libyuv/rotate_row.h


     Modify /third_party/libyuv/include/libyuv/row.h


     Modify /third_party/libyuv/include/libyuv/scale_row.h


     Modify /third_party/libyuv/include/libyuv/version.h


     Modify /third_party/libyuv/source/compare.cc


     Add /third_party/libyuv/source/compare_gcc.cc
    (from /third_party/libyuv/source/compare_posix.cc
    :f42012e526f218f4607e5d678c5bd44bb5978bff)
     Modify /third_party/libyuv/source/compare_neon64.cc


     Delete /third_party/libyuv/source/compare_posix.cc


     Modify /third_party/libyuv/source/compare_win.cc


     Modify /third_party/libyuv/source/convert.cc


     Modify /third_party/libyuv/source/convert_argb.cc


     Modify /third_party/libyuv/source/convert_from.cc


     Modify /third_party/libyuv/source/convert_from_argb.cc


     Modify /third_party/libyuv/source/cpu_id.cc


     Modify /third_party/libyuv/source/mjpeg_decoder.cc


     Modify /third_party/libyuv/source/mjpeg_validate.cc


     Modify /third_party/libyuv/source/planar_functions.cc


     Modify /third_party/libyuv/source/rotate.cc


     Add /third_party/libyuv/source/rotate_any.cc


     Modify /third_party/libyuv/source/rotate_argb.cc


     Add /third_party/libyuv/source/rotate_common.cc


     Add /third_party/libyuv/source/rotate_gcc.cc


     Modify /third_party/libyuv/source/rotate_mips.cc


     Modify /third_party/libyuv/source/rotate_neon.cc


     Modify /third_party/libyuv/source/rotate_neon64.cc


     Add /third_party/libyuv/source/rotate_win.cc


     Modify /third_party/libyuv/source/row_any.cc


     Modify /third_party/libyuv/source/row_common.cc


     Add /third_party/libyuv/source/row_gcc.cc
    (from /third_party/libyuv/source/row_posix.cc
    :f42012e526f218f4607e5d678c5bd44bb5978bff)
     Modify /third_party/libyuv/source/row_neon.cc


     Modify /third_party/libyuv/source/row_neon64.cc


     Delete /third_party/libyuv/source/row_posix.cc


     Modify /third_party/libyuv/source/row_win.cc


     Modify /third_party/libyuv/source/scale.cc


     Add /third_party/libyuv/source/scale_any.cc


     Modify /third_party/libyuv/source/scale_argb.cc


     Modify /third_party/libyuv/source/scale_common.cc


     Add /third_party/libyuv/source/scale_gcc.cc
    (from /third_party/libyuv/source/scale_posix.cc
    :f42012e526f218f4607e5d678c5bd44bb5978bff)
     Modify /third_party/libyuv/source/scale_neon.cc


     Modify /third_party/libyuv/source/scale_neon64.cc


     Delete /third_party/libyuv/source/scale_posix.cc


     Modify /third_party/libyuv/source/scale_win.cc



    update libyuv to r1456

    picks up build warning fixes for visual studio 2015

    Change-Id : Idea85fa70d1aeb2a46ea355b87fe41ec5b2b9520

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