Maybe you should take a look at transcoding.c example. With it you will have a solid starting base which works. This will handle your input decoding and encoding. For the encoding part i think that you need to open jpg encoder and jpg muxer. For the muxer you should be able to just specify filename_%3d.jpg and probably it will work without any additional options. This should be a step in a right direction. -------- Original message --------From: Ali Osman ŞAHAN <[email protected]> Date: 15/10/2018 17:12 (GMT+01:00) To: [email protected], [email protected] Subject: [Libav-user] Libav* Video to JPG
Dear experts, I need to decode (and export as jpg) H.264 and MPEG-2 I-pictures from within the source code of an application I'm writing in C. I linked against libavcodec in the hope that avcodec_decode_video() could do it but it seems that it only works for .mpg and not for raw elementary streams. I basically used the code from libavcodec's old apiexample.c (no AVPacket). Using ffmpeg on the 2 samples provided, I can easily decode them: ffmpeg -f h264 -i sample.264 -s 600x400 sample_%d.jpg ffmpeg -f mpegvideo -i sample.mpeg2 -s 600x400 sample_%d.jpg Can you please point out the function that I should use to achieve this using libavcodec? Also same question in http://ffmpeg.org/pipermail/libav-user/2011-April/000053.html.But links missed.Can you help me?
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