New here. I can read German but prefer writing English. Hope that's ok!
I have a VU Uno 4K SE.
I noticed the transcoded proxy files are as big as the hires files. With my test recording of 10 minutes: 1 GB.
The bitrate of the proxy is less than 50% of the hires.
- hires is MPEG TS with H.264 high profile 1920x1080 @ 25 fps, bitrate 14474 kb/s
- proxy is MPEG TS with H.264 baseline 720x480 @ 30 fps, bitrate 6927 kb/s
Duration of my test file is 00:10:00.52, the expected filesizes are:
- hires: (10*60*14474) / 1024 / 1024 / 8 = 1.03 GB --> as expected
- proxy: (10*60*6927) / 1024 / 8 = 507 MB --> actual file is also 1.03GB
What is strange: the reported duration of the proxy file is not 10 but 20 minutes (and the start differs).
With that reported duration the filesize is correct: ((20*60 + 44) *6927) / 1024 / 1024 / 8 = 1.03GB
So, why is the duration twice as long?
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Related, when using wget, the transfer speed is max 900 KB/s (scp of the hires file is in my case 17 MB/s). Is that a limit of the transcoder?
And I get many connection drops - especially near the end (that wget can deal with just fine), even though both STB and server are connected by ethernet.
I have a VU Uno 4K SE.
I noticed the transcoded proxy files are as big as the hires files. With my test recording of 10 minutes: 1 GB.
The bitrate of the proxy is less than 50% of the hires.
- hires is MPEG TS with H.264 high profile 1920x1080 @ 25 fps, bitrate 14474 kb/s
- proxy is MPEG TS with H.264 baseline 720x480 @ 30 fps, bitrate 6927 kb/s
Duration of my test file is 00:10:00.52, the expected filesizes are:
- hires: (10*60*14474) / 1024 / 1024 / 8 = 1.03 GB --> as expected
- proxy: (10*60*6927) / 1024 / 8 = 507 MB --> actual file is also 1.03GB
What is strange: the reported duration of the proxy file is not 10 but 20 minutes (and the start differs).
With that reported duration the filesize is correct: ((20*60 + 44) *6927) / 1024 / 1024 / 8 = 1.03GB
So, why is the duration twice as long?
Quellcode
- Input #0, mpegts, from 'hires.ts':
- Duration: 00:10:00.52, start: 115.187867, bitrate: 14474 kb/s
- Program 19401
- Stream #0:0[0x7d1]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(tv, bt709, top first), 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 50 tbr, 90k tbn, 50 tbc
- [...]
- Input #0, mpegts, from 'proxy.ts':
- Duration: 00:20:43.71, start: 72624.739922, bitrate: 6927 kb/s
- Program 1
- Stream #0:0[0x11]: Video: h264 (Baseline) ([27][0][0][0] / 0x001B), yuv420p(progressive), 720x480 [SAR 8:9 DAR 4:3], 29.97 fps, 30 tbr, 90k tbn, 59.94 tbc
- Stream #0:1[0x12]: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 130 kb/s
- wget "http://vuuno4kse:8002/file?file=${file}" -O proxy.ts
- [...]
- Length: 1086537728 (1.0G) [video/mpeg]
- [...]
- du -sm *.ts
- 1041 hires.ts
- 1028 proxy.ts
Related, when using wget, the transfer speed is max 900 KB/s (scp of the hires file is in my case 17 MB/s). Is that a limit of the transcoder?
And I get many connection drops - especially near the end (that wget can deal with just fine), even though both STB and server are connected by ethernet.