这是我的代码使用ffmpeg我想有视频缩略图但我不熟悉ffmpeg可以有人知道我得到的错误.
[swscaler @ 0x7ff8da028c00] deprecated pixel format used,make sure you did set range correctly Output #0,mjpeg,to 'image.jpg': Metadata: major_brand : mp42 minor_version : 0 compatible_brands: isommp42 encoder : Lavf56.36.100 Stream #0:0(und): Video: mjpeg,yuvj420p(pc),320x240 [SAR 4:3 DAR 16:9],q=2-31,200 kb/s,1 fps,1 tbn,1 tbc (default) Metadata: creation_time : 2016-11-06 09:40:22 handler_name : ISO Media file produced by Google Inc. encoder : Lavc56.41.100 mjpeg Stream mapping: Stream #0:0 -> #0:0 (h264 (native) -> mjpeg (native)) Press [q] to stop,[?] for help frame= 1 fps=0.0 q=4.8 Lsize= 16kB time=00:00:01.00 bitrate= 129.5kbits/s video:16kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000000%
这也是我的代码：
$video_url ='https://URL/upload/4b8acab123563649f19e07450d810df6.mp4'; $ffmpeg = '/opt/local/bin/ffmpeg'; $image = 'image.jpg'; $interval = 5; $size = '320x240'; shell_exec($tmp = "$ffmpeg -i $video_url -deinterlace -an -ss $interval -f mjpeg -t 1 -r 1 -y -s $size $image 2>&1");
根据ffmpeg论坛,从命令行调用时可以忽略它,我总是忽略它.您可以尝试的一件事(使用虚拟文件PLEASE测试)是将-pix_fmt yuvj422p添加到您的最后一行,所以它看起来像这样：
shell_exec($tmp = "$ffmpeg -i $video_url -pix_fmt yuvj422p -deinterlace -an -ss $interval -f mjpeg -t 1 -r 1 -y -s $size $image 2>&1");
正如我所说,请测试它,因为我不能保证结果,但就我而言,我使用了ffmpeg数千次,即使有警告,一切看起来都很好.
https://lists.ffmpeg.org/pipermail/ffmpeg-user/2014-February/020151.html
Afaict,the warning is primarily meant for library users,
ffmpeg users should not be affected.好的,那么就会忽略它.
