[Libav-user] How can we extract frames from a video stream in MPEG-4 AVC format

[Grzegorz Szpetkowski]

I am not FFmpeg API expert, but you can find working example
(avcodec_sample.0.5.0.c) at
http://web.me.com/dhoerl/Home/Tech_Blog/Entries/2009/1/22_Revised_avcodec_sample.c.html

There are also two guides that I know:
http://www.inb.uni-luebeck.de/~boehme/using_libavcodec.html (very outdated)
http://dranger.com/ffmpeg/tutorial01.html (little outdated)

To convert AVFrame from YUV to RGB you need to use sws_scale.

Regards
Grzegorz Sz.

2011/4/7 Amir Rouhi-Rmit <amir.rouhi at rmit.edu.au>:
> Hi
>
> I would be pleased if somebody guide me how can I extract frames in I-Frame
> format from a MPEG-4 AVC (H.264) video stream. The I-Frame can be:
>
> A- Any selected frame which can be extracted in form of a 1 frame video
> file. In this case the only frame of video should be in I-Frame.
>
> B- Extracting real I-Frames that exist in a video stream in form of  1 frame
> video files.
>
>
>
> I found a method myself for type A, which is based on converting video to
> RAW format by YUVTOOLS software(If somebody help me that how can I convert
> the video to YUV or RGB by ffmpeg or any free software I would be pleased) ,
> and then I select any frame by its number and extract it as a 1 frame video
> which is in I-Frame format by JM software. As you have noticed , this method
> is very costy and take a long time. I hope by help of you I find a method in
> ffmpeg filters to do that.
>
> Regards
>
> Amir
>
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