Two lessons from chasing one stubborn file. A 60 s stream copy (-ss X -c copy) of an H.264 source
with B-frames lost 230 of its 1500 frames and shifted the content, so every encode of that cut
looked broken (SSIM minimum 0.25) - harnesses must sample with byte copies, never stream copies,
and must prove themselves against a file compared with itself. And when a single file resists
diagnosis, park it and report it instead of stalling a library run on one item.
hoelee
1fd975fbb4