Encoding images to video with ffmpeg

Question

I am trying to encode series of images to one video file. I am using code from api-example.c, its works, but it gives me weird green colors in video. I know, I need to conve

Answer 1

You can see article http://unick-soft.ru/Articles.cgi?id=20. But it is article on Russian, but it includes code samples and VS Example.

Answer 2

I think the problem is most likely that you are using PIX_FMT_RGB8 as your input pixel format. This does not mean 8 bits per channel like the commonly used 24-bit RGB or 32-bit ARGB. It means 8 bits per pixel, meaning that all three color channels are housed in a single byte. I am guessing that this is not the format of your image since it is quite uncommon, so you need to use PIX_FMT_RGB24 or PIX_FMT_RGB32 depending on whether or not your input image has an alpha channel. See this documentation page for info on the pixel formats.

Answer 3

Has anyone found a fix for this? I am seeing the green video problem on the decode side. That is, when I decode incoming PIX_FMT_YUV420 packets and then swsscale them to PIX_FMT_RGBA.

Thanks!

EDIT: The green images are probably due to an arm optimization backfiring. I used this to fix the problem in my case: http://ffmpeg-users.933282.n4.nabble.com/green-distorded-output-image-on-iPhone-td2231805.html

I guess the idea is to not specify any architecture (the config will you a warning about the architecture being unknown but you can continue to 'make' anyway). That way, the arm optimizations are not used. There maybe a slight performance hit (if any), but atleast it works! :)