I have been searching but I can’t find if anyone knows a good ballpark for handling relatively mid bitrate (4-6mbps) 1080p x265 videos?
Depends a bit if you are also scaling the resolution downwards and if you are burning subtitles in.
If you go from 1080p to 1080p there were reports in the forums of ~6000-8000 passmark points required. Maybe lower, maybe higher sometimes.
Is there a way I can measure using my existing computer?
No. You can only look up the passmark score of your CPU here http://www.cpubenchmark.net/mid_range_cpus.html
X265 or hevc does need more than x264, I would say 6k plus. But if your cpu has native hevc decoding support your good at 4k
@Night said:
But if your cpu has native hevc decoding support your good at 4k
This doesn’t apply to the server.
Which CPUs have native x265 decoding? Can Plex take advantage of those CPUs?
@Dragooon said:
Which CPUs have native x265 decoding? Can Plex take advantage of those CPUs?
Plex Server can’t.
Plex clients like PHT or PMP may be able to.
@Dragooon said:
I have been searching but I can’t find if anyone knows a good ballpark for handling relatively mid bitrate (4-6mbps) 1080p x265 videos?
@OttoKerner said:
Depends a bit if you are also scaling the resolution downwards and if you are burning subtitles in.If you go from 1080p to 1080p there were reports in the forums of ~6000-8000 passmark points required. Maybe lower, maybe higher sometimes.
I can confirm the requirement for 8000 passmark in the case of 10 Mbps x265 being transcoded to x264 in 1080p.
@starbetrayer All right, say I was limited to 2-3mbps (because at higher bitrates I just go for x264), can I get by in under 5-6k? Is that something you have tried? Thank you!
@Dragooon said:
@starbetrayer All right, say I was limited to 2-3mbps (because at higher bitrates I just go for x264), can I get by in under 5-6k? Is that something you have tried? Thank you!
Could you confirm that your scenario would be x265 2-3 Mbps being transcoded to x264 ?
The reason for my question is that I want to make sure that you are looking at the cpu ressources in case of transcoding, which means your client is not compatible with x265.
I really think it would be benificial to understand why you want to use HVEC. In many cases x264 may be a better option unless you can direct play most of the time. If you have 4k video and are trying to keep it 4k that is probably the best option I can think of to keep it that way. You have to remember that x264 is very highly optimized now so your use case really needs to almost call for 4k for it to be a better option.
With all that being said I took a movie and converted it to 1080p HVEC. I believe the bitrate was less the 5mbps. It would play almost continuosly with occasional hickups on my i5 2400 CPU. So i would certainly say don’t go below 6k as that is around where the i5 2400 is.
It is primarily because I need to conserve bandwidth (I am capped at 200GB a month), so I, ehem, obtain them in x265 which preserves my quality while saving a ton of bandwidth. Worst case, I can expand my storage and use Plex’s optimise feature.
@starbetrayer said:
@Dragooon said:
@starbetrayer All right, say I was limited to 2-3mbps (because at higher bitrates I just go for x264), can I get by in under 5-6k? Is that something you have tried? Thank you!Could you confirm that your scenario would be x265 2-3 Mbps being transcoded to x264 ?
The reason for my question is that I want to make sure that you are looking at the cpu ressources in case of transcoding, which means your client is not compatible with x265.
Yes, some of them are even less than 2mbps. I am transcoding to x264 to be able to play on my TV via Chromecast. I am looking at software based transcoding, definitely.
@Dragooon said:
It is primarily because I need to conserve bandwidth (I am capped at 200GB a month), so I, ehem, obtain them in x265 which preserves my quality while saving a ton of bandwidth. Worst case, I can expand my storage and use Plex’s optimise feature.
Why don’t use you use sync to your devices then ? If possible of course.
@Dragooon said:
@starbetrayer said:
@Dragooon said:
@starbetrayer All right, say I was limited to 2-3mbps (because at higher bitrates I just go for x264), can I get by in under 5-6k? Is that something you have tried? Thank you!Could you confirm that your scenario would be x265 2-3 Mbps being transcoded to x264 ?
The reason for my question is that I want to make sure that you are looking at the cpu ressources in case of transcoding, which means your client is not compatible with x265.Yes, some of them are even less than 2mbps. I am transcoding to x264 to be able to play on my TV via Chromecast. I am looking at software based transcoding, definitely.
My guess would be that a 4 Mbps x265 transcoded is going to be in the neighborhood of 6000 passmark.
For 2-3 Mbps, you are looking at 4000-5000 I would guess (the passmark versus the stream is not linear, closer to a logarithmic curve.
@starbetrayer said:
@Dragooon said:
It is primarily because I need to conserve bandwidth (I am capped at 200GB a month), so I, ehem, obtain them in x265 which preserves my quality while saving a ton of bandwidth. Worst case, I can expand my storage and use Plex’s optimise feature.Why don’t use you use sync to your devices then ? If possible of course.
I can’t sync to Chromecast.
