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压缩后出现黑屏，只有声音 #29

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HobaoKing opened this issue Jul 14, 2020 · 4 comments

HobaoKing commented Jul 14, 2020

使用手机录制，压缩后黑屏

lihaojie commented Jul 31, 2020

我也遇到了、

breezewind-yang commented Jan 21, 2021

有解决方案吗

xiaogehenjimo commented Jan 28, 2022

有解决方法吗 @breezewind-yang @lihaojie @HobaoKing

sheodon commented Mar 29, 2022

(CGAffineTransform)transformFromDegress:(float)degress natureSize:(CGSize)natureSize{
/** 矩阵校正 */
// x = ax1 + cy1 + tx,y = bx1 + dy2 + ty
if (degress == 90) {
return CGAffineTransformMake(0, 1, -1, 0, natureSize.height, 0);
}else if (degress == 180){
return CGAffineTransformMake(-1, 0, 0, -1, natureSize.width , natureSize .height);
}else if (degress == 270){
return CGAffineTransformMake(0, -1, 1, 0, 0, natureSize.width); //视频压缩/合成出现黑屏现象
// return CGAffineTransformMake(0, -1, 1, 0, -natureSize.height, 2 * natureSize.width);
}else{
return CGAffineTransformIdentity;
}
}

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