How can I identify GIF files that were written by FFMPEG?

0

I have lot of gif files, several thousand.

Some of them was created by me, and I nearly always used ffmpeg when encoding the gif.

Now I would like to select those animations from the large collection, which was created by me.

Maybe I could narrow the number of gif files which need an examination by viewing, if I would be able to select those somehow, which were created by ffmpeg.

Konstantin

Posted 2020-01-02T06:20:28.647

Reputation: 515

Answers

3

The GIF format does not have any metadata fields that could help you identify the writer. The binary format starts with a GIF89a header; the rest is image data.

So I'm afraid there's no way to automatically detect ffmpeg as a writer.

slhck

Posted 2020-01-02T06:20:28.647

Reputation: 182 472

I agree. Meanwhile I tried to use the "strings" linux utility, to find some common strings in the GIFs, which are known was written by ffmpeg, but no success. – Konstantin – 2020-01-02T22:20:03.107

1ffmpeg does not write any particular strings to GIF files. (Other formats like MP4 or MKV will have “writing application” tags like Lavf58.29.100 which stands for libavformat, the FFmpeg library for writing containers.) – slhck – 2020-01-02T22:53:24.210

Asked: 2020-01-02T06:20:28.647

Viewed: 48 times

Active: 2020-01-02T09:58:17.057