J'ai regardé un peu les logs et je pense que c'est un probleme de N° série :
2017-11-04T11:50:12+01:00 NAS synopkgctl: resource_api.cpp:163 Acquire webapi-desc for VideoStation when 0x0001 (done)
2017-11-04T11:50:12+01:00 NAS synopkgctl: resource_api.cpp:163 Acquire webapi-desc for VideoStation when 0x0001 (done)
2017-11-04T11:50:12+01:00 NAS synopkgctl: SYSTEM: Last message 'resource_api.cpp:163' repeated 1 times, suppressed by syslog-ng on NAS
2017-11-04T11:50:12+01:00 NAS synopkgctl: resource_api.cpp:163 Acquire data-share for VideoStation when 0x0001 (done)
2017-11-04T11:50:12+01:00 NAS synopkgctl: resource_api.cpp:163 Acquire web-config for VideoStation when 0x0001 (done)
2017-11-04T11:50:13+01:00 NAS synovideostation: synovideostation.cpp:26 Re-index triggered [synoindex -R /volume1/video/ -P VideoStation]
2017-11-04T11:50:52+01:00 NAS synoscgi_SYNO.VideoStation2.Streaming_1_open[29798]: video_format_profile.cpp:357 There is no such json member, value[bromolow_1] in [/v$
2017-11-04T11:50:56+01:00 NAS synocodectool: G1Licence.cpp:79 Licence not Success,error msg "SN format is wrong."
2017-11-04T11:50:56+01:00 NAS synocodectool: SYNOCodecPatentG1.cpp:186 ValidateG1Licence failed
2017-11-04T11:50:58+01:00 NAS synocodectool: G1Licence.cpp:79 Licence not Success,error msg "SN format is wrong."
2017-11-04T11:50:58+01:00 NAS synocodectool: SYNOCodecPatentG1.cpp:239 ValidateG1Licence failed
2017-11-04T11:53:56+01:00 NAS synoscgi_SYNO.Core.Package.Installation_1_install[31578]: resource_api.cpp:163 Acquire service-cfg for nano when 0x0001 (done)
2017-11-04T11:54:10+01:00 NAS synoscgi_SYNO.Core.Package.Installation_1_install[32037]: resource_api.cpp:163 Acquire service-cfg for darkstat when 0x0001 (done)
2017-11-04T11:56:26+01:00 NAS synoscgi_SYNO.VideoStation2.Streaming_1_open[877]: video_format_profile.cpp:357 There is no such json member, value[bromolow_1] in [/var$
2017-11-04T11:56:29+01:00 NAS synocodectool: G1Licence.cpp:79 Licence not Success,error msg "SN format is wrong."
2017-11-04T11:56:29+01:00 NAS synocodectool: SYNOCodecPatentG1.cpp:186 ValidateG1Licence failed
2017-11-04T11:56:31+01:00 NAS synocodectool: G1Licence.cpp:79 Licence not Success,error msg "SN format is wrong."
2017-11-04T11:56:31+01:00 NAS synocodectool: SYNOCodecPatentG1.cpp:239 ValidateG1Licence failed
Je vais modifier ça on verra bien ...