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To guarantee a stable broadcast in case of losing the access to the media storage, the media content can be cached locally using the Proxy function in the Cinegy Playout engine. The media files are re-compressed according to the defined preset.
Video, audio and VANC are cached into separate files and divided into chunks. The size of the video chunks depends on the source file and proxy settings.
Daniel2 codec is used for video proxying. Proxy size and image quality are not affected by the GPU / CPU accelerator.
The size of video chunks can be calculated on the basis of bitrates given in the following table:
| Size |
FPS |
Uncompressed 8bit(b/s) |
Uncompressed 10bit(b/s) |
High Quality (b/s) |
Medium Quality(b/s) |
Best Performance (b/s) |
| 720х480 |
29.97 |
165,722,112 |
331,444,224 |
78,641,280 |
52,507,440 |
36,203,760 |
| 720х576 |
25 |
165,888,000 |
331,776,000 |
76,200,000 |
51,200,000 |
35,000,000 |
|
1280х720
files 1280x720 25/29.97fps (non-standard framerate for this format) are processed as 50/59.94
|
50 |
737,280,000 |
1,474,560,000 |
229,200,000 |
153,200,000 |
105,200,000 |
| |
59.94 |
883,853,914 |
1,767,707,828 |
274,765,784 |
183,656,711 |
126,114,138 |
| 1920х1080 |
25 |
829,440,000 |
1,658,880,000 |
229,200,000 |
152,600,000 |
106,200,000 |
| |
29.97 |
994,332,673 |
1,988,665,346 |
274,764,960 |
182,936,880 |
127,312,560 |
| |
50 |
1,658,880,000 |
3,317,760,000 |
458,400,000 |
305,200,000 |
212,400,000 |
| |
59.94 |
1,988,671,306 |
3,977,342,612 |
549,531,567 |
365,874,857 |
254,625,883 |
| 3840х2160 |
25 |
3,317,760,000 |
6,635,520,000 |
920,800,000 |
613,600,000 |
427,600,000 |
| |
29.97 |
3,977,330,692 |
7,954,661,384 |
1,103,855,041 |
735,583,681 |
512,606,881 |
| |
50 |
6,635,520,000 |
13,271,040,000 |
1,841,600,000 |
1,227,200,000 |
855,200,000 |
| |
59.94 |
7,954,685,224 |
15,909,370,448 |
2,207,716,699 |
1,471,171,771 |
1,025,216,834 |
| 7680х4320 |
25 |
13,271,040,000 |
26,542,080,000 |
3,771,000,000 |
2,514,000,000 |
1,750,000,000 |
| |
29.97 |
15,909,322,768 |
31,818,645,536 |
4,520,674,805 |
3,013,783,203 |
2,097,900,002 |
| |
50 |
26,542,080,000 |
53,084,160,000 |
7,542,000,000 |
5,028,000,000 |
3,500,000,000 |
| |
59.94 |
31,818,740,897 |
63,637,481,793 |
9,041,376,706 |
6,027,584,471 |
4,195,812,579 |
| Wrapped Frames In Chunk |
| Frame |
fps |
Uncompressed 8, KByte |
Uncompressed 10, KByte |
High Quality,
KByte
|
Medium Quality,
KByte
|
Best Performance
KByte
|
| 720х480 |
29.97 |
691,200 |
1,382,400 |
328,192 |
219,136 |
151,040 |
| 720х576 |
25 |
829,440 |
1,658,880 |
381,440 |
256,512 |
175,104 |
| 1280х720 |
25-29.97/50-59.94 |
3,686,400 |
7,372,800 |
1,146,368 |
766,464 |
526,336 |
| 1920х1080 |
25-29.97 |
4,147,200 |
8,294,400 |
1,146,368 |
763,392 |
531,456 |
| |
50-59.94 |
8,294,400 |
16,588,800 |
2,292,224 |
1,526,272 |
1,062,400 |
| 3840х2160 |
25-29.97 |
16,588,800 |
33,177,600 |
4,604,416 |
3,068,416 |
2,138,112 |
| |
50-59.94 |
33,177,600 |
66,355,200 |
9,208,320 |
6,136,320 |
4,276,224 |
| 7680х4320 |
25-29.97 |
66,355,200 |
132,710,400 |
18,855,424 |
12,570,112 |
8,750,080 |
| |
50-59.94 |
132,710,400 |
265,420,800 |
37,710,336 |
25,140,224 |
17,500,160 |
| * files of non-standard format (differ in framerate, frame size) are proxied in the format of the channel |
You will also need extra disk space for audio tracks and VANC data. This is about 0.66 GB for 1-hour audio (one audio track) and 0.5 Gb for 1-hour VANC.
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