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  1. Hi everybody,
    when i use mp4box to mux H264 and AAC together, mp4box automatically adds "encoded date" and "tagged date" entries to every stream in the file.
    so the MediaInfo output of the resulted file looks like:

    General
    Complete name : G:\001.mp4
    Format : MPEG-4
    Format profile : Base Media
    Codec ID : isom
    File size : 52.5 MiB
    Duration : 22mn 52s
    Overall bit rate : 321 Kbps
    Encoded date : UTC 2011-06-08 19:30:07
    Tagged date : UTC 2011-06-08 19:30:07
    Video
    ID : 1
    Format : AVC
    Format/Info : Advanced Video Codec
    Format profile : High@L3.1
    Format settings, CABAC : Yes
    Format settings, ReFrames : 10 frames
    Codec ID : avc1
    Codec ID/Info : Advanced Video Coding
    Duration : 22mn 52s
    Bit rate mode : Variable
    Bit rate : 275 Kbps
    Maximum bit rate : 1 717 Kbps
    Width : 640 pixels
    Height : 480 pixels
    Display aspect ratio : 4:3
    Frame rate mode : Constant
    Frame rate : 25.000 fps
    Color space : YUV
    Chroma subsampling : 4:2:0
    Bit depth : 8 bits
    Scan type : Progressive
    Bits/(Pixel*Frame) : 0.036
    Stream size : 45.0 MiB (86%)
    Writing library : x264 core 106 r1732 b20059a
    Encoding settings : cabac=1 / ref=10 / deblock=1:1:2 / analyse=0x3:0x133 / me=esa / subme=9 / psy=1 / psy_rd=0.40:0.00 / mixed_ref=1 / me_range=24 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=0 / chroma_qp_offset=-2 / threads=12 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / constrained_intra=0 / bframes=8 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=60 / rc=2pass / mbtree=1 / bitrate=275 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / aq=1:0.60
    Tagged date : UTC 2011-06-08 19:30:09
    Audio
    ID : 2
    Format : AAC
    Format/Info : Advanced Audio Codec
    Format profile : HE-AAC / LC
    Codec ID : 40
    Duration : 22mn 52s
    Bit rate mode : Variable
    Bit rate : 42.8 Kbps
    Maximum bit rate : 46.5 Kbps
    Channel(s) : 2 channels
    Channel positions : Front: L R
    Sampling rate : 48.0 KHz / 24.0 KHz
    Compression mode : Lossy
    Stream size : 7.00 MiB (13%)
    Encoded date : UTC 2011-06-08 19:30:08
    Tagged date : UTC 2011-06-08 19:30:09

    Is there anyway to remove those date entries from the resulted file?
    any help appreciated!
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  2. Member bat999's Avatar
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    Feb 2008
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    United Kingdom
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    Originally Posted by jamesNN View Post
    Is there anyway to remove those date entries from the resulted file?
    Hi
    I don't think it's possible to prevent MP4Box from creating those date fields.

    AtomicParsley has a "--metaEnema" option....
    but it doesn't clear the "Encoded date" and "Tagged date" fields.

    But if you run the file through FFmpeg it will clear them.
    Use a command like this:-
    Code:
    ffmpeg -i 001.mp4 -vcodec copy -acodec copy new001.mp4
    Last edited by bat999; 8th Jun 2011 at 15:56.
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  3. Thanks dude, ffmpeg really works
    but are you sure there is no way to do that from within mp4box?
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  4. I created and ran a batch file to process all the .mp4 files i have in ffmpeg(they are about 1700 files), surprisingly the size of the resulted set is bigger than the source in about 410MB.
    Each file is about 0.25MB bigger than its source, and that is bugging me a little bit.
    So, are there any unneeded headers that ffmpeg adds to the file by default and is there any switch to stop adding these headers?, please help!
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  5. Please help me,I don't want to post my problem elsewhere.
    What is going on, how is the resulted file bigger than the source file?!
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