Measure YouTube player's FPS performance
I would like to measure the performance of a YouTube video, for example the frame rate. There is an option on YouTube called "Stats for nerds", which displays the connection speed as well as buffer health and dropped frames besides some other interesting stuff – but not the current frames per second.
Is there any way to measure the current frames per second? By fps I don't mean the fps of the video itself, but the fps which the video player manages to display.
Also the measurement of the latency would be nice to know.
windows-10 performance youtube video-playback
asked Jan 11 at 7:57
solidsolid
31
add a comment |
I would like to measure the performance of a YouTube video, for example the frame rate. There is an option on YouTube called "Stats for nerds", which displays the connection speed as well as buffer health and dropped frames besides some other interesting stuff – but not the current frames per second.
Is there any way to measure the current frames per second? By fps I don't mean the fps of the video itself, but the fps which the video player manages to display.
Also the measurement of the latency would be nice to know.
windows-10 performance youtube video-playback
asked Jan 11 at 7:57
solidsolid
31
Isn't that just video FPS minus "dropped frames"?
– grawity
Jan 11 at 8:08
@grawity You don't even have to know the video FPS, since both decoded and dropped frames are exposed by WebKit.
– slhck
Jan 11 at 8:18
@slhck: I was referring to the counter already shown in "Stats for nerds".
– grawity
Jan 11 at 8:22
add a comment |
I would like to measure the performance of a YouTube video, for example the frame rate. There is an option on YouTube called "Stats for nerds", which displays the connection speed as well as buffer health and dropped frames besides some other interesting stuff – but not the current frames per second.
Is there any way to measure the current frames per second? By fps I don't mean the fps of the video itself, but the fps which the video player manages to display.
Also the measurement of the latency would be nice to know.
windows-10 performance youtube video-playback
asked Jan 11 at 7:57
solidsolid
31
I would like to measure the performance of a YouTube video, for example the frame rate. There is an option on YouTube called "Stats for nerds", which displays the connection speed as well as buffer health and dropped frames besides some other interesting stuff – but not the current frames per second.
Is there any way to measure the current frames per second? By fps I don't mean the fps of the video itself, but the fps which the video player manages to display.
Also the measurement of the latency would be nice to know.
windows-10 performance youtube video-playback
windows-10 performance youtube video-playback
asked Jan 11 at 7:57
solidsolid
31
asked Jan 11 at 7:57
solidsolid
31
edited Jan 11 at 8:14
solid
asked Jan 11 at 7:57
solidsolid
31
asked Jan 11 at 7:57
solidsolid
31
asked Jan 11 at 7:57
solidsolid
31
31
Isn't that just video FPS minus "dropped frames"?
– grawity
Jan 11 at 8:08
@grawity You don't even have to know the video FPS, since both decoded and dropped frames are exposed by WebKit.
– slhck
Jan 11 at 8:18
@slhck: I was referring to the counter already shown in "Stats for nerds".
– grawity
Jan 11 at 8:22
add a comment |
Isn't that just video FPS minus "dropped frames"?
– grawity
Jan 11 at 8:08
@grawity You don't even have to know the video FPS, since both decoded and dropped frames are exposed by WebKit.
– slhck
Jan 11 at 8:18
@slhck: I was referring to the counter already shown in "Stats for nerds".
– grawity
Jan 11 at 8:22
Isn't that just video FPS minus "dropped frames"?
– grawity
Jan 11 at 8:08
Isn't that just video FPS minus "dropped frames"?
– grawity
Jan 11 at 8:08
@grawity You don't even have to know the video FPS, since both decoded and dropped frames are exposed by WebKit.
– slhck
Jan 11 at 8:18
@grawity You don't even have to know the video FPS, since both decoded and dropped frames are exposed by WebKit.
– slhck
Jan 11 at 8:18
@slhck: I was referring to the counter already shown in "Stats for nerds".
– grawity
Jan 11 at 8:22
@slhck: I was referring to the counter already shown in "Stats for nerds".
– grawity
Jan 11 at 8:22
add a comment |
1 Answer
1
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oldest
votes
For WebKit, there are two video element attributes that you can query regularly:
webkitDecodedFrameswebkitDroppedFrames
More explanation here.
Using these, you can, for example, run a timer every second to get the values and calculate the real framerate. The two values should sum up to the total frames available in the video per played out second. Bear in mind that:
- You have to pause counting if the video is not playing
- Javascript timers are not very accurate
- These attributes are vendor-specific and may be removed at some point
You could have a look at some example code that implements these metrics and calculates a mean played FPS — all you'd have to do is slightly rewrite that for pasting into the Chrome devtools console on YouTube.
answered Jan 11 at 8:17
slhckslhck
161k47447470
Hi slhck,thanks for your answer. Unfortunately the example code doesn't work for me. The video won't start playing.
– solid
Jan 11 at 11:01
The video doesn't exist anymore at this URL. It's just an example which has to be adapted to run on YouTube itself.
– slhck
Jan 11 at 11:26
add a comment |
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1 Answer
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active
oldest
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1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
For WebKit, there are two video element attributes that you can query regularly:
webkitDecodedFrameswebkitDroppedFrames
More explanation here.
Using these, you can, for example, run a timer every second to get the values and calculate the real framerate. The two values should sum up to the total frames available in the video per played out second. Bear in mind that:
- You have to pause counting if the video is not playing
- Javascript timers are not very accurate
- These attributes are vendor-specific and may be removed at some point
You could have a look at some example code that implements these metrics and calculates a mean played FPS — all you'd have to do is slightly rewrite that for pasting into the Chrome devtools console on YouTube.
answered Jan 11 at 8:17
slhckslhck
161k47447470
Hi slhck,thanks for your answer. Unfortunately the example code doesn't work for me. The video won't start playing.
– solid
Jan 11 at 11:01
The video doesn't exist anymore at this URL. It's just an example which has to be adapted to run on YouTube itself.
– slhck
Jan 11 at 11:26
add a comment |
For WebKit, there are two video element attributes that you can query regularly:
webkitDecodedFrameswebkitDroppedFrames
More explanation here.
Using these, you can, for example, run a timer every second to get the values and calculate the real framerate. The two values should sum up to the total frames available in the video per played out second. Bear in mind that:
- You have to pause counting if the video is not playing
- Javascript timers are not very accurate
- These attributes are vendor-specific and may be removed at some point
You could have a look at some example code that implements these metrics and calculates a mean played FPS — all you'd have to do is slightly rewrite that for pasting into the Chrome devtools console on YouTube.
answered Jan 11 at 8:17
slhckslhck
161k47447470
Hi slhck,thanks for your answer. Unfortunately the example code doesn't work for me. The video won't start playing.
– solid
Jan 11 at 11:01
The video doesn't exist anymore at this URL. It's just an example which has to be adapted to run on YouTube itself.
– slhck
Jan 11 at 11:26
add a comment |
For WebKit, there are two video element attributes that you can query regularly:
webkitDecodedFrameswebkitDroppedFrames
More explanation here.
Using these, you can, for example, run a timer every second to get the values and calculate the real framerate. The two values should sum up to the total frames available in the video per played out second. Bear in mind that:
- You have to pause counting if the video is not playing
- Javascript timers are not very accurate
- These attributes are vendor-specific and may be removed at some point
You could have a look at some example code that implements these metrics and calculates a mean played FPS — all you'd have to do is slightly rewrite that for pasting into the Chrome devtools console on YouTube.
answered Jan 11 at 8:17
slhckslhck
161k47447470
For WebKit, there are two video element attributes that you can query regularly:
webkitDecodedFrameswebkitDroppedFrames
More explanation here.
Using these, you can, for example, run a timer every second to get the values and calculate the real framerate. The two values should sum up to the total frames available in the video per played out second. Bear in mind that:
- You have to pause counting if the video is not playing
- Javascript timers are not very accurate
- These attributes are vendor-specific and may be removed at some point
You could have a look at some example code that implements these metrics and calculates a mean played FPS — all you'd have to do is slightly rewrite that for pasting into the Chrome devtools console on YouTube.
answered Jan 11 at 8:17
slhckslhck
161k47447470
answered Jan 11 at 8:17
slhckslhck
161k47447470
answered Jan 11 at 8:17
slhckslhck
161k47447470
answered Jan 11 at 8:17
slhckslhck
161k47447470
161k47447470
Hi slhck,thanks for your answer. Unfortunately the example code doesn't work for me. The video won't start playing.
– solid
Jan 11 at 11:01
The video doesn't exist anymore at this URL. It's just an example which has to be adapted to run on YouTube itself.
– slhck
Jan 11 at 11:26
add a comment |
Hi slhck,thanks for your answer. Unfortunately the example code doesn't work for me. The video won't start playing.
– solid
Jan 11 at 11:01
The video doesn't exist anymore at this URL. It's just an example which has to be adapted to run on YouTube itself.
– slhck
Jan 11 at 11:26
Hi slhck,thanks for your answer. Unfortunately the example code doesn't work for me. The video won't start playing.
– solid
Jan 11 at 11:01
Hi slhck,thanks for your answer. Unfortunately the example code doesn't work for me. The video won't start playing.
– solid
Jan 11 at 11:01
The video doesn't exist anymore at this URL. It's just an example which has to be adapted to run on YouTube itself.
– slhck
Jan 11 at 11:26
The video doesn't exist anymore at this URL. It's just an example which has to be adapted to run on YouTube itself.
– slhck
Jan 11 at 11:26
add a comment |
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Isn't that just video FPS minus "dropped frames"?
– grawity
Jan 11 at 8:08
@grawity You don't even have to know the video FPS, since both decoded and dropped frames are exposed by WebKit.
– slhck
Jan 11 at 8:18
@slhck: I was referring to the counter already shown in "Stats for nerds".
– grawity
Jan 11 at 8:22