Quote:
Originally Posted by eathasa
Ah, well, that would explain it
Next question: Why is it necessary to set both the sample aspect ratio and the display aspect ratio -- if either one is honored, the other is a given. Is there a reason that both values are stored and can be inconsistent with each other?
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Because sar is not always honored by players. Some players (e.g. QuickTime) requires a valid DAR value in MP4.
IMO DAR should not be set unless there is no place to put sar in the bitstream(e.g. WMV3). So ffmpeg build from my fork does not write DAR for mkv since no player requires DAR in MKV.