>Hi All
>
>When using the JPEG decoder (CODEC_ID_MJPEG) sometimes I find that decoded
>frames are inverted/upside down/back to front. Having read into the problem I
>believe the issue is to do with the fact that bitmap is sometimes stored
>bottom-up in JPEG files.
>
>Does the decoder not realign the frame correctly or is this something that I
>would have to take care of after the decoding? If anyone can suggest the best
>way to deal with this I would appreciate it.
>
>Thanks,
>Mark.
You'll have to read metadata (Exif most of the time) to know what is the
orientation of the stored bitmap and then process it to get the right rendering.
I don't think ffmpeg has any facility to read Exif metadata but you can use
filters to do the rotation/flipping job.
Regards,
Cyril APAN.
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