[FFmpeg-user] Adding "loop" atom to the video header via FFMPEG

Vikram Parmar parmar.vikram at gmail.com
Fri Jan 12 13:27:12 EET 2018

I tried using some AtomicParslet commands

e.g AtomicParsley giphy9.mp4 --meta-uuid "beam" text "loop"

But it doesn't add stuff like its needed as shown in the stackoverflow

Some help please...

On Fri, Jan 12, 2018 at 8:18 AM, Vikram Parmar <parmar.vikram at gmail.com>

> You mentioned the presence of "LOOP" atom in apple docs,
> https://developer.apple.com/library/content/documentation/
> QuickTime/QTFF/QTFFChap2/qtff2.html
> Could this "loop" be the same thing? If so, how to add this apple movie
> atom via ffmpeg?
> But the "loop" atom I need would be needed at the start of the file before
> the moov atom, I wonder where the apple "LOOP" atom gets headed in the
> file...
> On 12 Jan 2018 08:15, "Vikram Parmar" <parmar.vikram at gmail.com> wrote:
>> Hey Moritz,
>> Thanks for the detailed reply...
>> Any other tools you are aware of which would allow adding of custom
>> atoms? Those instructions in stackoverflow answer were quite daunting.
>> Woukd mp4box help in any way? We are using php, would it be possible to
>> add/modify file headers in php?
>> Also, there is a "beam" atom too before the "loop" atom, is that too a
>> custom non standard atom?
>> Thanks....
>> On 12 Jan 2018 02:00, "Moritz Barsnick" <barsnick at gmx.net> wrote:
>>> On Thu, Jan 11, 2018 at 15:33:43 +0530, Vikram Parmar wrote:
>>> > Is it possible to add some custom atom in the header of a video file?
>>> No, ffmpeg can't add custom or arbitrary atoms.
>>> > I need to add the term "loop" in the header of MP4 files before the
>>> "moov"
>>> > atom.
>>> >
>>> > More information can be found here :
>>> >
>>> > https://stackoverflow.com/questions/44893316/whatsapp-video-
>>> as-gif-sharing-on-android-programatically
>>> That doesn't seem to be a standard atom. I do see mention of a "LOOP"
>>> atom here though:
>>> https://developer.apple.com/library/content/documentation/Qu
>>> ickTime/QTFF/QTFFChap2/qtff2.html
>>> > Note: Just opening the video file using any text editor shows the file
>>> > header and atoms.
>>> AtomicParsley is a nice tool for showing atoms and their hierarchies.
>>> > I do not want to edit the headers via too much calculations, as the
>>> answer
>>> > suggests. Is there a simple FFMPEG command to add the atom "loop" to
>>> any
>>> > MP4 files?
>>> If those instructions work, they're probably scriptable, and you're
>>> best off with that.
>>> AtomicParsley, while being able to edit atoms, unfortunately doesn't
>>> seem to be able to add arbitrary atoms.
>>> If the atom was some kind of standard, you could modify ffmpeg to add
>>> it (e.g. with an output option similar to the gif muxer's "-loop").
>>> > I wish to add some parameter to the above command (or maybe run a
>>> separate
>>> > command) so that the output mp4 file has that "loop" atom in the
>>> header.
>>> Someone who knows their way around this fishy atom business ("fishy"
>>> just because I'm too stupid to wrap my head around it) could probably
>>> implement this in ffmpeg in a breeze. Since, from what I found, it's
>>> not even "standard", I doubt it would be accepted for ffmpeg.
>>> Moritz
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