To determine the technical video stream quality, Filmhub uses the term Compression Rate. It is calculated by dividing the pixels per second (pixel rate) by the bits per second (bit rate):
Filmhub specifies one maximum accepted Compression Rate per video codec. Videos with a higher Compression Rate will fail listing review.
As a simple reference, the SD, HD and 4K columns show the rule-of-thumb minimum bitrate or codec variant requirements.
Example Calculations
💡 Resolution refers to the stored pixel width and height, not displayed, for anamorphic (non-square) pixel aspect ratios.
1080p, 20 Mbps
720p, 10 Mbps
SD (NTSC), 5 Mbps
SD (PAL), 5 Mbps
|
Codec |
Max Comp Rate |
4k |
HD |
SD |
Notes |
Support Level |
|
Avid DNxHR |
3.9 |
SQ/HQ/HQX/444 |
SQ/HQ/444 |
SQ/HQ/444 |
Bitrate is inherent to variant |
Recommend |
|
Avid DNxHD |
0.43 |
|
DNxHD min. 145 |
DNxHD min. 60 |
Min. variant required depends on resolution and fps |
Recommend |
|
ProRes |
0.61 |
422/HQ |
422/HQ |
422/HQ |
Bitrate is inherent to variant - all pass except LT and Proxy |
Recommend |
|
DV25/50 |
0.36 |
≥ 50 Mbps |
≥ 50 Mbps |
≥ 25 Mbps |
25 Mbps (50 Mbps for DVCPRO) is inherent standard for codec |
Accept |
|
H.264 (AVC) |
5.2 |
≥ 50 Mbps |
≥ 15 Mbps |
≥ 2 Mbps |
|
Accept |
|
H.265 (HEVC) |
5.2 |
≥ 50 Mbps |
≥ 15 Mbps |
≥ 2 Mbps |
|
Accept |
|
MPEG-2 |
1.24 |
|
≥ 50 Mbps |
≥ 8.5 Mbps |
|
Accept |
Inherent Compression Rates of Common Codecs
Apple ProRes
Apple ProRes has inherent, non-adjustable bitrates, depending on the ProRes variant, resolution, and frame rate. There are various variants including ProRes 422, ProRes 422 HQ, ProRes 4444, and ProRes XQ (see also About Apple ProRes on Apple Support).
🛑 Please note: Apple ProRes 422 LT and Proxy are not accepted. ProRes 4444, 4444 XQ, and RAW – while high quality – are not ideal because of unnecessarily high storage needs.
Notes to below:
-
Real-world bitrate is based on empirical, local encoding tests with Apple Compressor. Our results showed 80 - 89% of the Target Bitrate of the Apple White Paper.
-
Compression Rate uses the Real-World bitrate with a 15% tolerance
Target Bitrates and Compression Ratios
|
Name |
x |
y |
fps |
Mbps |
Real-world Mbps |
Comp Ratio |
Listing Review |
|
ProRes 422 HQ |
1920 |
1080 |
29.97 |
220 |
180.4 |
0.405 |
Recommend |
|
ProRes 422 |
1920 |
1080 |
29.97 |
147 |
120.54 |
0.607 |
Accept |
|
ProRes 422 |
1920 |
1080 |
24 |
117 |
95.94 |
0.61 |
Accept |
|
ProRes RAW |
|
|
|
|
0 |
0 |
Fail |
|
ProRes 4444 XQ |
1920 |
1080 |
29.97 |
500 |
410 |
0.178 |
Fail |
|
ProRes 4444 |
1920 |
1080 |
29.97 |
330 |
270.6 |
0.27 |
Accept |
|
ProRes 422 LT |
1920 |
1080 |
29.97 |
102 |
83.64 |
0.874 |
Fail |
|
ProRes 422 Proxy |
1920 |
1080 |
29.97 |
45 |
36.9 |
1.981 |
Fail |
Avid DNxHR
Avid DNxHR bitrate depends on resolution. Therefore, SQ & up is accepted in all resolutions.
DNxHR Codec Bandwidth Specifications
Avid DNxHD
Avid DNxHD bitrates are independent of resolution. Therefore, each resolution has different DNxHD variant requirements.
Min. requirements for:
-
1080p: DNxHD 145
-
720p: DNxHD 80
-
SD: DNxHD 60
Compression Ratios
|
Name |
x |
y |
fps |
Mbps |
Comp Ratio |
QC |
|
DNxHD 220 1080p |
1920 |
1080 |
29.97 |
220 |
0.282 |
Recommend |
|
DNxHD 185 1080p |
1920 |
1080 |
29.97 |
185 |
0.336 |
Recommend |
|
DNxHD 145 1080p |
1920 |
1080 |
29.97 |
145 |
0.429 |
Accept |
|
DNxHD 120 1080p |
1920 |
1080 |
29.97 |
120 |
0.518 |
Fail |
|
DNxHD 90 1080p |
1920 |
1080 |
29.97 |
90 |
0.691 |
Fail |
|
DNxHD 90 720p |
1280 |
720 |
29.97 |
90 |
0.307 |
Accept |
|
DNxHD 80 720p |
1280 |
720 |
29.97 |
80 |
0.345 |
Accept |
|
DNxHD 60 720p |
1280 |
720 |
29.97 |
60 |
0.46 |
Fail |
|
DNxHD 60 SD |
720 |
480 |
29.97 |
60 |
0.173 |
Accept |
|
DNxHD 36 SD |
720 |
480 |
29.97 |
36 |
0.288 |
Accept |