GPAC MP4Box Information, Feature Requests & Discussions [No bug reports]

[Selur]

Nope,... problem is I'm unsure what to look for :/
muxed with ffmpeg: http://pastebin.com/58i9PKeu
muxed with mp4box: http://pastebin.com/dZmjTNXE
-> any help is appreciated

[LoRd_MuldeR]

Well, there's a quite obvious difference right at the beginning, in the "ftyp" atom:

<FileTypeBox MajorBrand="isom" MinorVersion="512">
    <BoxInfo Size="28" Type="ftyp"/>
    <BrandEntry AlternateBrand="isom"/>
    <BrandEntry AlternateBrand="iso2"/>
    <BrandEntry AlternateBrand="mp41"/>
</FileTypeBox>

<FileTypeBox MajorBrand="M4V " MinorVersion="1">
    <BoxInfo Size="28" Type="ftyp"/>
    <BrandEntry AlternateBrand="isom"/>
    <BrandEntry AlternateBrand="M4V "/>
    <BrandEntry AlternateBrand="mp42"/>
</FileTypeBox>

[Selur]

there are so many differences,... that it's hard to know what's important, so I thought some one here probably would have used mp4box to remux Xvid content for iTunes&Co and could say something more.
-> will look further into it tomorrow. (need some sleep now )

[LoRd_MuldeR]

Well, I'd say a difference in the "ftyp" atom, which is an "file type" identifier for ISO Media (MP4) files, is a good candidate for compatibility issues.

Interestingly it seems to make a difference whether you let MP4Box save the output file with a .MP4 or .M4V extension


Also note the following related MP4Box options:

-brand ABCD[:v]
Sets the major brand of a file. Brands are used to identify the most common usage of a file (MPEG-4 presentation, 3GP movie, etc…). If ‘v’ is set, also sets the version of the brand (default version is 0).

-ab ABCD
adds an alternate brand to the file. Alternate Brands are used to identify the other possible usage of a file (whether the 3GP file compliant with MPEG-4, etc…)

[Selur]

Normally iTunes&Co files need the .m4v extension otherwise chapters&co are not identified properly,..

[Selur]

found the problem:

MP4Box -par 1=1 -add "xvidVideo.avi"#video:fps=23.976 -ipod -new "test.m4v"

needs to be:

MP4Box -par 1=1:1 -add "xvidVideo.avi"#video:fps=23.976 -ipod -new "test.m4v"

DOH,...

[Mattlb0619]

i cant believe ive not seen this thread before.... listening.

Matt Bodin

[RBO]

Hey guys,

I'm a GPAC maintainer. I came here by chance.

@Selur: the parsing now emits an error to avoid this non-obvious issue: http://sourceforge.net/apps/trac/gpac/changeset/4277/

Please post on our forums or tracker when you see errors.

Thanks,

Romain

[Jamaika]

How to enter commands globaltags in MP4Box 0.5.2-DEV-rev529?
I can't use itags because I can't use the Enter and write in UTF-8. Can it do somehow with DOS?
Why don't players and MediaInfo show the metadata attachment in MP4Box?

<MetaBox>
  <BoxInfo Size="166" Type="meta"/>
  <FullBoxInfo Version="0" Flags="0x0"/>
  <HandlerBox Type="mdir" Name="GPAC mdir Handler" reserved1="0" reserved2="data:application/octet-string,000000000000000000000000">
    <BoxInfo Size="50" Type="hdlr"/>
    <FullBoxInfo Version="0" Flags="0x0"/>
  </HandlerBox>
  <ItemLocationBox offset_size="0" length_size="4" base_offset_size="4">
    <BoxInfo Size="30" Type="iloc"/>
    <FullBoxInfo Version="0" Flags="0x0"/>
    <ItemLocationEntry item_ID="1" data_reference_index="0" base_offset="806422" />
    <ItemExtentEntry extent_offset="0" extent_length="446082" />
  </ItemLocationBox>
  <ItemInfoBox>
    <BoxInfo Size="74" Type="iinf"/>
    <FullBoxInfo Version="0" Flags="0x0"/>
    <ItemInfoEntryBox item_ID="1" item_protection_index="0" item_name="photo1.jpg" content_type="image/jpeg" content_encoding="">
      <BoxInfo Size="60" Type="infe"/>
      <FullBoxInfo Version="0" Flags="0x0"/>
    </ItemInfoEntryBox>
  </ItemInfoBox>
  <ItemInfoBox>
    <BoxInfo Size="74" Type="iinf"/>
    <FullBoxInfo Version="0" Flags="0x0"/>
    <ItemInfoEntryBox item_ID="2" item_protection_index="0" item_name="photo2.jpg" content_type="image/jpeg" content_encoding="">
      <BoxInfo Size="60" Type="infe"/>
      <FullBoxInfo Version="0" Flags="0x0"/>
    </ItemInfoEntryBox>
  </ItemInfoBox>
  <ItemInfoBox>
    <BoxInfo Size="74" Type="iinf"/>
    <FullBoxInfo Version="0" Flags="0x0"/>
    <ItemInfoEntryBox item_ID="3" item_protection_index="0" item_name="photo3.jpg" content_type="image/jpeg" content_encoding="">
      <BoxInfo Size="60" Type="infe"/>
      <FullBoxInfo Version="0" Flags="0x0"/>
    </ItemInfoEntryBox>
  </ItemInfoBox>
</MetaBox>

[SeeMoreDigital]

Originally Posted by Jamaika

Why don't players and MediaInfo show the metadata attachment in MP4Box?

Which 'meta-data' tags do you want to see?

[Jamaika]

Format                                   : MPEG-4
Format profile                           : Base Media
Codec ID                                 : iso4
File size                                : 556 MiB
Duration                                 : 16mn 31s
Overall bit rate mode                    : Variable
Overall bit rate                         : 4 703 Kbps
Movie name                               : Sunflowers field
Performer                                : Jamaika
Attachements                             : photo1.jpg / photo2.jpg /photo3.jpg / font.otf
Encoded date                             : UTC 2015-08-06 05:15:12
Tagged date                              : UTC 2015-08-06 05:15:12
Cover                                    : Yes
Comment                                  : Bike trail

Photo of the Matroska container

[Kurtnoise]

Originally Posted by Jamaika

I can't use itags because I can't use the Enter and write in UTF-8. Can it do somehow with DOS?

did you try to switch to Lucida Console font first and then chcp 65001 in the command prompt ?

[Jamaika]

It doesn't help command @chcp 65001. The file *.bat is saved in ANSI.

Active code page: 65001
...
iTunes Info:
        Comment: Krajobraz w?woz?w i zach?d s?o?ca
1 UDTA types: meta (1)

When we want to obtain information about the MP4 container with the proper save itunes texts UTF-8 then function DOS chcp 65001 as the most useful.

iTunes Info:
        Comment: Krajobraz wąwozów i zachód słońca
1 UDTA types: meta (1)

My ideas on the use of covers.
The registers to display the cover icons JPEG, PNG in File Explorer Windows 10. The cover don't open by Windows Photo.

HKCR\.mp4,"Content Type",,"video/mp4"
HKCR\.mp4,"PerceivedType",,"video"
HKCR\.mp4\ShellEX\{BB2E617C-0920-11D1-9A0B-00C04FC2D6C1},,,{9DBD2C50-62AD-11D0-B806-00C04FD706EC}
HKCR\.mp4\ShellEX\{e357fccd-a995-4576-b01f-234630154e96},,,{9DBD2C50-62AD-11D0-B806-00C04FD706EC}
HKCR\MIME\Database\Content Type\video/mp4,"AutoplayContentTypeHandler",,"PicturesContentHandler"
HKCR\MIME\Database\Content Type\video/mp4,"CLSID",,"{cd3afa99-b84f-48f0-9393-7edc34128127}"

Reboot Windows

[SeeMoreDigital]

Have you considered creating 'named' chapters for each image?

[Jamaika]

Description chapters was before.
http://forum.doom9.org/showthread.php?t=94874&page=22

Originally Posted by Atak_Snajpera

I need command for mp4box which extracts chapters. I haven't found nothing interesting under -h extract

This is a hidden function.

mp4box.exe -dump-chap-ogg input.mp4 -out chapter.txt

[RBO]

I have added the missing doc to the option: https://github.com/gpac/gpac/commit/...90725a99cf3ecd
Thanks, Romain

[Jamaika]

I miss still a function to copy metadata. It has already been repeatedly reported and probably not achievable in MP4Box.
MP4Box.exe -new -info -add "(video+audio).mp4:????(copy itunes)" -add "subtitle.ttxt/srt" "output.mp4"

I wonder also why any cover (webp, bpg, jpeg2000, others) and the name cover we can't use attachment(add-item) in the function itunes. For me it is an unnecessary duplication of functions "cover" and "set-meta/add-item".

Edit:
How to transfer metadata information to the newly created MP4 file? :idea: As we know, no such function "copy UDTA types: meta (1) chpl (1)" and could be a problem because the metadata information using -add functions are cleared.
Use a trick if you want to enter additional subtitles, chapter or cover.
mp4box.exe -add "subtitle.srt" -add "chapter.txt" -itags cover = "*. jpg,*. png" output{metadata}.mp4
Note:!: output{metadata}.mp4 file metadata is overwritten by newly added function. If muxer something wrong to do it the original file isn't recoverable.

[Kurtnoise]

- Use m4v or m4a as output extension in order to activate Apple devices support.
- only jpg and png are supported as well for Apple devices. See MP4Box -tag-list switch...

[Jamaika]

Originally Posted by Kurtnoise

- Use m4v or m4a as output extension in order to activate Apple devices support.

Theoretically, yes. Unfortunately, everyone knows that Apple fought with MP4 and Apple implemented container MOV for all video codecs. So the struggle the worlds with Microsoft continues today.
MP4Box doesn't support MOV.

Originally Posted by Kurtnoise

- only jpg and png are supported as well for Apple devices. See MP4Box -tag-list switch...

It is known for years with documentation help. Only apparently we have a world of new codecs photo HEVC/VPX. Hence my whining.

[filler56789]

http://sourceforge.net/p/gpac/discus...read/43881fa9/

Very interesting, there was no "lack of time" for adding HEVC support to MP4Box...