how to stop mp4box from adding the date to the muxed file?

[jamesNN]

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!

[bat999]

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:-

ffmpeg -i 001.mp4 -vcodec copy -acodec copy new001.mp4

[jamesNN]

Thanks dude, ffmpeg really works
but are you sure there is no way to do that from within mp4box?

[jamesNN]

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!

[jamesNN]

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?!