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| ALbino |
| Posted: Mar 8 2015, 02:11 AM |
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Advanced Member
Group: Members
Posts: 101
Member No.: 26983
Joined: 9-February 10
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| QUOTE (raffriff42 @ Mar 8 2015, 01:35 AM) | Are you capturing uncompressed? It is possible you have used too much free space on the hard drive or created disk fragmentation; either way your disk will write more slowly than it did before.
When capturing with VirtualDub, you can choose any supported compression codec, but x264 is for the final product; it's too slow for real time capture.
For capture, I suggest one of the following 'lossless' codecs. They are all very fast and make your capture file 3-6 times smaller. Listed from newest to oldest, they are:
MagicYUV - possibly still experimental.
UT Video
Lagarith
Huffyuv - reliable & fast but single threaded. 32 bit only. |
Never saw MagicYUV before. Just played around with it, and it's pretty cool. In my test Lagarith compressed an extra 7%, but MagicYUV did it 20% faster. I'll have to play with it some more. Thanks for posting that. |
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| TinyTurtles |
| Posted: Mar 8 2015, 05:49 AM |
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Member
Group: Members
Posts: 10
Member No.: 38696
Joined: 5-March 15
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| QUOTE (raffriff42 @ Mar 8 2015, 01:35 AM) | Are you capturing uncompressed? It is possible you have used too much free space on the hard drive or created disk fragmentation; either way your disk will write more slowly than it did before.
When capturing with VirtualDub, you can choose any supported compression codec, but x264 is for the final product; it's too slow for real time capture.
For capture, I suggest one of the following 'lossless' codecs. They are all very fast and make your capture file 3-6 times smaller. Listed from newest to oldest, they are:
MagicYUV - possibly still experimental.
UT Video
Lagarith
Huffyuv - reliable & fast but single threaded. 32 bit only. |
I am using x264 to capture. I don't think the HDD is the issue. It's a modern 6Gb/s drive with over 600GB of space and recently defragmented. I thought that might be a problem so I switched my capture file to record on a Samsung 840 SSD and there was no change. I can see that I am not understanding how this software works. How come the codecs that are included with the AIO installer are useless for capture? I thought that was the point of using compression? Also, how come I can record in real time with no compression and not without compression? I would be glad to capture to an uncompressed file but, even with my hardware, it results in file sizes that are just too large. |
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| ALbino |
| Posted: Mar 8 2015, 06:05 AM |
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Advanced Member
Group: Members
Posts: 101
Member No.: 26983
Joined: 9-February 10
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x264 requires a lot of processing power to do the compression, that's why you're dropping frames. He's saying use something like Lagarith as an intermediate so that you can capture a clean lossless signal while still keeping the filesize manageable, and then use x264 to compress your final product after you've edited it with your cuts and adjustments. Even if you did capture with x264, once you edited it and re-rendered it out you would be compressing something that's already been compressed and you'd lose a lot of quality that way. Better to start with a raw uncompressed file, or a lossless one, and then only compress it for your final output. |
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| ale5000 |
| Posted: Mar 8 2015, 08:06 AM |
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Advanced Member
Group: Members
Posts: 1114
Member No.: 22180
Joined: 30-September 07
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I have updated VirtualDub AIO, now it include all needed dll files.
PS: Later I will add other lossless codecs.
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New VirtualDub forum
VirtualDub AIO (All-in-One installer for VirtualDub and plugins)
Codec Toolbox RS (A tool to read/change merit of codecs and many other things)
Input plugins for VirtualDub / ACM codecs / VFW codecs |
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| TinyTurtles |
| Posted: Mar 12 2015, 04:40 AM |
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Member
Group: Members
Posts: 10
Member No.: 38696
Joined: 5-March 15
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| QUOTE (ALbino @ Mar 8 2015, 06:05 AM) | | x264 requires a lot of processing power to do the compression, that's why you're dropping frames. He's saying use something like Lagarith as an intermediate so that you can capture a clean lossless signal while still keeping the filesize manageable, and then use x264 to compress your final product after you've edited it with your cuts and adjustments. Even if you did capture with x264, once you edited it and re-rendered it out you would be compressing something that's already been compressed and you'd lose a lot of quality that way. Better to start with a raw uncompressed file, or a lossless one, and then only compress it for your final output. |
Ohhh so I need to just use a lossless codec to capture. Basically I just need to do less on the fly compression encoding to get rid of the dropped frames and funny audio? |
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| TinyTurtles |
| Posted: Mar 12 2015, 04:42 AM |
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Member
Group: Members
Posts: 10
Member No.: 38696
Joined: 5-March 15
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| QUOTE (ale5000 @ Mar 8 2015, 08:06 AM) | I have updated VirtualDub AIO, now it include all needed dll files.
PS: Later I will add other lossless codecs. |
I see these forums are closing in a few days for good. Will your AIO installer with all of the necessary codecs still be in the same place? If so, I can bookmark it now and check back in a while since I won't be able to get the notification here. |
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| ale5000 |
| Posted: Mar 12 2015, 05:23 AM |
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Advanced Member
Group: Members
Posts: 1114
Member No.: 22180
Joined: 30-September 07
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Now it is inside here: http://ale5000.altervista.org/wicked-gift.htm
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New VirtualDub forum
VirtualDub AIO (All-in-One installer for VirtualDub and plugins)
Codec Toolbox RS (A tool to read/change merit of codecs and many other things)
Input plugins for VirtualDub / ACM codecs / VFW codecs |
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