Fmp4 overhead vs ADTS/AAC

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Fmp4 overhead vs ADTS/AAC

Ronak Patel
Hi all,

I was curious about the best way to calculate the overhead of an fmp4 file vs ADTS. The fmp4 will just contain audio.

I tried calculating the size of the ftyp, moov and subsequent moof and sidx boxes but that seems like it’s not enough.

Is a portion of mdat overhead as well? If so, what would be the best way to calculate this?

Thanks

Ronak

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Re: Fmp4 overhead vs ADTS/AAC

Carl Eugen Hoyos-2
2018-06-12 2:14 GMT+02:00, Ronak Patel <[hidden email]>:

> I was curious about the best way to calculate the overhead of an
> fmp4 file vs ADTS.

(Assuming the difference between adts and "mov/mp4")

This sounds very difficult to calculate, it will be easier to just
test with ffmpeg (or MP4Box).
The difference will be systematical iirc, not only a static overhead.

Carl Eugen
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Re: Fmp4 overhead vs ADTS/AAC

Ronak Patel
Hi Carl,

What do you mean by "just test with ffmpeg?"

What option prints this information out? Or what code would I have to write?

Ronak

> On Jun 12, 2018, at 4:14 AM, Carl Eugen Hoyos <[hidden email]> wrote:
>
> 2018-06-12 2:14 GMT+02:00, Ronak Patel <[hidden email]>:
>
>> I was curious about the best way to calculate the overhead of an
>> fmp4 file vs ADTS.
>
> (Assuming the difference between adts and "mov/mp4")
>
> This sounds very difficult to calculate, it will be easier to just
> test with ffmpeg (or MP4Box).
> The difference will be systematical iirc, not only a static overhead.
>
> Carl Eugen
> _______________________________________________
> ffmpeg-user mailing list
> [hidden email]
> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>
> To unsubscribe, visit link above, or email
> [hidden email] with subject "unsubscribe".

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Re: Fmp4 overhead vs ADTS/AAC

Carl Eugen Hoyos-2
2018-06-12 16:01 GMT+02:00, Ronak <[hidden email]>:

> What do you mean by "just test with ffmpeg?"

Run commands and compare the output file size (that is also written
on the last status line iirc).

Please do not top-post here, Carl Eugen
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