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image compression ffmpeg

LukeProducts (65)
Hey folks,

I’m trying to use FFmpeg in C++ to compress image buffers, but I keep running into a fundamental issue. I’m seeing this error:
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[libx264 @ 00000000006d6100] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 00000000006d6100] profile High, level 5.0, 4:2:0, 8-bit
Error receiving packet!
[libx264 @ 00000000006d6100] final ratefactor: 42.29
Failed to compress screenshot!


Code: https://pastebin.com/isjxx0TF

Has anyone faced a similar issue or knows how to handle this? Any help would be much appreciated!

Thanks.

Luke
salem c (3700)
Read the manual page and understand how the functions are supposed to be used.

https://ffmpeg.org/doxygen/4.0/group__lavc__decoding.html#ga5b8eff59cf259747cf0b31563e38ded6

Returns
0 on success, otherwise negative error code: AVERROR(EAGAIN): output is not available in the current state - user must try to send input AVERROR_EOF: the encoder has been fully flushed, and there will be no more output packets AVERROR(EINVAL): codec not opened, or it is an encoder other errors: legitimate decoding errors

EAGAIN isn't a fatal error, yet you treat it as one.

On a more general point, maximise the information in your error messages. Like always printing the result of whatever comparison failed.


Examples:
encode_audio.c, encode_video.c, transcode_aac.c, vaapi_encode.c, and vaapi_transcode.c.


Go and study all those example codes.
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