[Libav-user] JPEG decoder

Mark Kenna mark.kenna at sureviewsystems.com
Thu Jun 13 10:53:17 CEST 2013

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.

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