FFMPEG in emby poorly support Thumbnail Extraction for some WMV files

[Mark4551124015]

It will be trapped into a infinite loop shown below:

Skip-Option - Write output: pkt_pts_time:36.8034 pkt_dts_time:36.8034 input_pts_time:7820.7
[asf @ 0000023f65ba5900] asf_read_pts failed
    Last message repeated 8 times
Skip-Option - Write output: pkt_pts_time:36.8368 pkt_dts_time:36.8368 input_pts_time:7820.7
[asf @ 0000023f65ba5900] asf_read_pts failed
    Last message repeated 8 times
Skip-Option - Write output: pkt_pts_time:36.8702 pkt_dts_time:36.8702 input_pts_time:7820.7
[asf @ 0000023f65ba5900] asf_read_pts failed
    Last message repeated 8 times
Skip-Option - Write output: pkt_pts_time:36.9035 pkt_dts_time:36.9035 input_pts_time:7820.7e=off speed=0.18x
[asf @ 0000023f65ba5900] asf_read_pts failed
    Last message repeated 8 times
Skip-Option - Write output: pkt_pts_time:36.9369 pkt_dts_time:36.9369 input_pts_time:7820.7
[asf @ 0000023f65ba5900] asf_read_pts failed
    Last message repeated 8 times
Skip-Option - Write output: pkt_pts_time:36.9703 pkt_dts_time:36.9703 input_pts_time:7820.7
[asf @ 0000023f65ba5900] asf_read_pts failed
    Last message repeated 8 times
Skip-Option - Write output: pkt_pts_time:37.0036 pkt_dts_time:37.0036 input_pts_time:7820.7
[asf @ 0000023f65ba5900] asf_read_pts failed
    Last message repeated 8 times
Skip-Option - Write output: pkt_pts_time:37.037 pkt_dts_time:37.037 input_pts_time:7820.7
[asf @ 0000023f65ba5900] asf_read_pts failed
    Last message repeated 8 times
Skip-Option - Write output: pkt_pts_time:37.0704 pkt_dts_time:37.0704 input_pts_time:7820.7e=off speed=0.18x
[asf @ 0000023f65ba5900] asf_read_pts failed
    Last message repeated 8 times
elapsed=00:03:25.95 frame= 1112 fps=5.4 q=0.0 Lsize=N/A time=00:00:37.10 bitrate=N/A throttle=off speed=0.18x
video:11733kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
Exiting normally, received signal 2.