- This topic has 32 replies, 3 voices, and was last updated 4 years, 9 months ago by
.
-
Posts
-
Over the last week I have downloaded several episodes of The Chase, Tipping Point and Countdown.
Since the Aura updatde I have downloaded at 5fps and each file is about 1Gb+ when downloaded; today the same programmes downloaded at over 2GB each. They are all transcoded HD. It can’t be incorrect file size reporting as all the files took much longer to download.
What is going on?
If you look at the file details using Media Info the file is frame doubled. So you get a 50fps file.
If you do not need the subtitles and the audio description tracks you can make the file a lot smaller by removing the unwanted tracks using TSmuxer GUI.
You can then cut out the extra frames and upscale to 720p HD quality using Vidcoder with the shown settings,
All the above are free software
[attachment=86399,1781] [attachment=86399,1782]
If you want to cut out the ads. The best and fastest mpeg editor out there is this one. It’s not free though. It only recodes at cuts so it’s lightning fast. It also has a streamfix option that can fix faulty mpeg streams,
I’m just setting a couple of programmes to transcode, one from last night and a similar episode from a couple of weeks ago – will report back if there is any size difference. In the absence of any firmware updates over the last few days, I can’t think of a good reason why a file should be bigger today than it would have been a few days ago unless you’ve turned on something or changed a setting on the Aura.
What did you mean by the 5fps Gordy? Did you mean 50fps?
No differences noted here – transcoded a couple of HD broadcasts of about 30mins length and both reduced from the HD encrypted file size of 1gb down to just over 500Mb after transcoding.
Not sure you’re helping to answer Gordy’s question, Graham.
His point was that he is getting a difference between the transcoded file sizes a few days ago vs the transcoded file sizes today.
larkim – 6 hours ago »
Not sure you’re helping to answer Gordy’s question, Graham.
His point was that he is getting a difference between the transcoded file sizes a few days ago vs the transcoded file sizes today.
I have being getting files that size from the last two software updates. Nothing has changed for me.
I have provided file details for HD recordings downloaded from both. In both cases the video content is twice as big simply because every frame is duplicated so there are twice as many frames as required for the original 25 fps content
I went to the trouble to download an untouched HD recording from scratch just in case anything has changed. It has not.
I can’t understand why the OP can’t post the same information. Without this how can anyone comment further ???
Perhaps you would like to choose a HD recording and do the same and help by posting the results you actually get.
Otherwise you are not helping in any way are you ?????
It’s very simple in windows to find this info. Guess it’s the same using a Apple Mac.
I might be teaching you to suck eggs.
You do realise that ignoring the complexities of mpeg compression your TV is showing you a series of still images slightly different. For 25 fps each one is shown for 1/25 second. For 50 fps each one is shown for for half as long for 1/50th second.
It works because of the human eyes persistance of vision. You cannot see the joins.
If the same image is shown twice from a 50fps stream you get a 1/25 second single frame. You cannot see the difference. The file though is twice as large.
This goes back to a long time to the first days of moving picture technology. Way ack to monochrome silent movies.
If gordyboy would provide details from the two recordings in question.
In windows explorer right click on a file. Choose properties and select the details tab it would save a lot of effort trying to explain the difference.
Perhaps he had software updates between the two downloads.
Yep, I know the tech details. But as you say my experience of download file sizes from the Aura is that nothing has changed recently so it would be helpful if the OP posted his details.
Here you go. The properties of “The Chase” recorded and downloaded today at 2.25GB and “The Chase” from the 5th of this month at 0.98GB also recorded and downloaded on the date it was broadcast both from ITV HD channel transcoded by Aura and downloaded via WebControlIF. The only setting adjusted is on the Aura where I changed something from 2 to 5 I think it said fps but I changed this more than 5 days ago.
Could it be that the Aura didn’t update the changes I made after the over the air update until I unplugged the Aura and plugged it in again after it froze a couple of days ago?
I don’t have a complaint about the file size.The larger file looks superb on my Galaxy S7+ 5G Tablet and Galaxy S21 Ultra 5G phone
[attachment=86501,1789] [attachment=86501,1790]
Aha, you’ve changed the bitrate. That explains everything!!
That’s effectively the quality of the file, in theory a 5Mbps bitrate file should be visible higher quality than 2Mbps but it will be broadly 2.5 times bigger as a file.
I’d change it back to 2 if the quality was acceptable at 2. If not, then increased file size is the inevitable consequence; there simply more data in there.
GordyBoy – 11 hours ago »
Here you go. The properties of “The Chase” recorded and downloaded today at 2.25GB and “The Chase” from the 5th of this month at 0.98GB also recorded and downloaded on the date it was broadcast both from ITV HD channel transcoded by Aura and downloaded via WebControlIF. The only setting adjusted is on the Aura where I changed something from 2 to 5 I think it said fps but I changed this more than 5 days ago.
Could it be that the Aura didn’t update the changes I made after the over the air update until I unplugged the Aura and plugged it in again after it froze a couple of days ago?
I don’t have a complaint about the file size.The larger file looks superb on my Galaxy S7+ 5G Tablet and Galaxy S21 Ultra 5G phone
[attachment=86501,1789] [attachment=86501,1790]
You have the same as me. Double the number of frames it should have for 25fps.
Stripping out the duplicated frames will not make it look on worse on you Galaxy tablet.
- You must be logged in to reply to this topic.