[FFmpeg-user] Difference between i-frames and key frames

markfilipak.imdb at gmail.com markfilipak.imdb at gmail.com
Sun Oct 29 23:59:05 EET 2023

On 10/7/23 16:28, Ferdi Scholten wrote:
> On 07-10-2023 17:20, Ulf Zibis wrote:
>> Hi,
>> what is the difference between i-frames and key frames?
>> And how many other frames are between i-frames or key frames in mp4 files, created with ffmpeg and 
>> with default settings?
>> -Ulf
> In mp4 containers I-frames are key frames.>

That is not correct. Via ffprobe, I have seen I-frames that were not marked 'key_frame=1'.

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