Chinese random code error

[3400442579]

var saveThumbnailTask = new MediaToolkit.Tasks.FfTaskGetThumbnail(@“C:\Users\jxw\Desktop\新建 文件夹\SampleVideo_1280x720_1mb.mp4”, new MediaToolkit.Tasks.GetThumbnailOptions
{
FrameSize = new MediaToolkit.Tasks.FrameSize(80, 80),
OutputFormat = idata.BgImg ,
PixelFormat = "png",
SeekSpan = TimeSpan.FromSeconds(1)
});
try
{
await imts.ExecuteAsync(saveThumbnailTask);
}
catch(Exception e) {

                        }

{"Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'C:\Users\jxw\Desktop\鏂板缓 鏂囦欢澶筡SampleVideo_1280x720_1mb.mp4':\r\n Metadata:\r\n major_brand : isom\r\n minor_version : 512\r\n compatible_brands: isomiso2avc1mp41\r\n creation_time : 1970-01-01T00:00:00.000000Z\r\n encoder : Lavf53.24.2\r\n Duration: 00:00:05.31, start: 0.000000, bitrate: 1589 kb/s\r\n Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 1205 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)\r\n Metadata:\r\n creation_time : 1970-01-01T00:00:00.000000Z\r\n handler_name : VideoHandler\r\n Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 384 kb/s (default)\r\n Metadata:\r\n creation_time : 1970-01-01T00:00:00.000000Z\r\n handler_name : SoundHandler\r\n[NULL @ 04620080] Requested output format 'E:\lq\watermark\RemoveWatermark\bin\x86\Debug\net462\temp\b66a3ac62d7c49cf822ac27c5387d41a\shot.png' is not a suitable output format\r\npipe:: Invalid argument\r\n"}