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Sur d’autres sites (7745)

  • How to detect the real orientation of a video recorded by mobile with "auto rotate" disabled

    28 octobre 2022, par FlamingMoe

    When you record a video, the rotation metadata has 4 possible values (0, 90, 180 and 270) and it stores how the device was held when starting the recording.

    


    But mobile phones has also a feature to enable or disable "auto rotation" of screen.

    


    It's very typical, nowadays, to have that feature disable, and many people record videos with the phone horizontally, but since the "auto rotation" is disable, the metadata stores like the video was recorded as vertically.

    


    How to handle this ?

    


  • Image overlay on video between two time using mobile-ffmpeg android

    8 mars 2021, par Saeid Honardan

    I am trying to add image overlay on video using "mobile-ffmpeg-full-gpl:4.4" library but faced following error :

    


    Error when evaluating the expression 'between(t' for enable' error.


    


    I have a class that create overlay filter for adding image :

    


    class ImageFilter {&#xA;&#xA;static String getFilter(String input, String output, ArrayList<extratl> listImage, int order){&#xA;    String filter="";&#xA;    for (int i=0; icode></extratl>

    &#xA;

    FFMPEG Command used :

    &#xA;

    -loop 1 -i /storage/emulated/0/OP_Video_Editor/.temp/background.png -ss 0.0 -t 21.18 -i /storage/emulated/0/OP_Video_Editor/.temp/1614097633623.mp4 -i /storage/emulated/0/OP_Video_Editor/.resource/sticker_i02.png -filter_complex [1:v]crop=640:360:0:0[crop];[crop]scale=1280:720[v_scale];color=black:1280x720,fps=30[bgr0];[bgr0][0:v]overlay[bgr];[bgr][v_scale]overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/2:shortest=1[v1];[1:a]aformat=sample_fmts=fltp:sample_rates=44100:channel_layouts=stereo,volume=1.0[a1];[v1][a1]concat=n=1:v=1:a=1[v][a];[a]aformat=sample_fmts=fltp:sample_rates=44100:channel_layouts=stereo,volume=1.0[a0];[a0]amix=inputs=1:duration=longest:dropout_transition=1[outAudio];[2:v]scale=333:333,rotate=-0.0:c=none:ow=rotw(-0.0):oh=roth(-0.0)[ov2];[v][ov2]overlay=333.33334:333.33334:enable=&#x27;between(t,0.0,10.0)&#x27;[inText] -map [inText] -map [outAudio] -format yuva420p -preset ultrafast -video_track_timescale 90k -b:v 2000k -c:v libx264 -bufsize 64k -c:a aac -bsf aac_adtstoasc -strict -2 -y /storage/emulated/0/videoExport/videoplayback_22_21_28_18_44_10.mp4 &#xA;

    &#xA;

    Also my log when I run program is :

    &#xA;

    &#x27;2021-03-03 17:26:32.165 11664-11830/com.hecorat.azplugin2 E/mobile-ffmpeg: [overlay @ 0xdc5f3b80] [Eval @ 0xc5bd6b70] Missing ")" or too many args in "between(t"&#xA;&#xA;2021-03-03 17:26:32.167 11664-11830/com.hecorat.azplugin2 E/mobile-ffmpeg: [overlay @ 0xdc5f3b80] Error when evaluating the expression "between(t" for enable&#x27;&#xA;

    &#xA;

    How can I resolve this error ?

    &#xA;

  • FFMPEG - Use Orientation metadata for mobile recordings

    21 mai 2012, par Kim Egede Jakobsen

    When I convert a .mov file recorded on a iPhone 4S, the video is rotated 180 degrees.
    If I playing the video on my computer, it looks correct.

    I got the same issue with .3gp files from Android and .mov from iPhone 4 (They are rotated 90 degrees)

    I have tried looking in the documentation for FFMPEG, but it seems that I will need to scan the metadata and then add it to my convertion script ?

    Command tried : ffmpeg -i VID_20120510_104204.mov -y -f flv -ar 44100 VID_20120510_104204.flv
    Also looked on -vf %ROTATE%

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