php 我收到错误“使用了已弃用的像素格式，请确保您使用 ffmpeg 正确设置了范围”..有人可以检查我下面的代码吗？
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Im getting error "deprecated pixel format used, make sure you did set range correctly using ffmpeg".. can someone check my code below?
提问by Mavs Mavs
This is my code using ffmpeg i want to have video thumbnail but im not familiar in ffmpeg can someone know the error i got.
这是我使用 ffmpeg 的代码，我想要视频缩略图，但我对 ffmpeg 不熟悉，有人知道我遇到的错误吗？
[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%
Also This is my code:
另外这是我的代码：
$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 $image 2>&1");
回答by Louis Loudog Trottier
According to ffmpeg forum this can be ignored when called from the command line and i always ignored it. One thing you can try (test with a dummy file PLEASE) is to add -pix_fmt yuvj422pto your last line so it look like this:
根据 ffmpeg 论坛，从命令行调用时可以忽略它，我总是忽略它。您可以尝试的一件事（请使用虚拟文件进行测试）是添加-pix_fmt yuvj422p到您的最后一行，使其看起来像这样：
shell_exec($tmp = "$ffmpeg -i $video_url -pix_fmt yuvj422p -deinterlace -an -ss $interval -f mjpeg -t 1 -r 1 -y -s $size $image 2>&1");
As i said, test it please as i cannot guaratee the results but as far as i'm concerned i'Ve used ffmpeg thousand of times and everything looks just fine even with the warning.
正如我所说，请测试它，因为我无法保证结果，但就我而言，我已经使用了 ffmpeg 数千次，即使有警告，一切看起来也很好。
https://lists.ffmpeg.org/pipermail/ffmpeg-user/2014-February/020151.html
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.
OK, will just ignore it then.
Afaict，警告主要针对图书馆用户，ffmpeg 用户不应该受到影响。
好吧，那就忽略它吧。
回答by Mavs Mavs
I just change the path of the destination of the image:
我只是更改图像目的地的路径：
# path of image on the server
$image = '/users/xx/xxxx/sample/upload/image.jpg';
Then used the following:
然后使用了以下内容：
# $ffmpeg - path of ffmpeg on the server
# $video_url - path of the video file on the server
shell_exec($tmp = "$ffmpeg -i $video_url -pix_fmt yuvj422p -deinterlace -an -ss $interval -f mjpeg -t 1 -r 1 -y -s $size $image 2>&1");
