Posted: 4/12/2017 1:00 AM
Post subject: CamStudio GZIP problem
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Sonia
She/Her
Joined: 12/6/2013
Posts: 435
Location: Brazil
I have a problem while trying to encode using the CamStudio codec's GZIP option. Basically, I can dump .avi with GZIP, but when I try to encode it with VirtualDub, GZIP fails and I'm forced to use LZO. Here are my steps: 1) Dump a movie with CamStudio codec on GZIP. 2) Drag and drop the created .avi on VirtualDub. 3) Go "Video > Filters > Resize" and pick nearest neighbor to resize the video into 8x. 4) Go "Video > Compression" and pick the CamStudio codec again as GZIP. 5) Go "File > Save as AVI" 6) Get an error. This is the error (with a not so helpful description) I get: I repeat the same steps except for "4)" where I pick LZO instead of GZIP. The new .avi is saved without problems. Here's a short video showing all my steps and the error being reproduced: https://www.youtube.com/watch?v=8_YDtdsOe5Y I've searched for a solution online and this is the only relevant result I found: http://camstudio.org/forum/discussion/831/gzip-problem That person has exactly the same problem as me. But unfortunately, nobody replied to that. Can someone help me with this? I've had this problem for years and never solved it. I'd like to encode with GZIP because the files are better compressed and become much smaller with said mode.
Posted: 4/12/2017 12:17 PM
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creaothceann
He/Him
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Joined: 4/7/2005
Posts: 1874
Location: Germany
You could try encoding with Lagarith instead. Or x264vfw in lossless RGB mode, though I haven't tested that (don't even know if it's really lossless).
Posted: 4/12/2017 2:45 PM
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feos
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I don't think you can export avi from virtualdub using CS gzip. Lagarith works well for that.
Warning: When making decisions, I try to collect as much data as possible before actually deciding. I try to abstract away and see the principles behind real world events and people's opinions. I try to generalize them and turn into something clear and reusable. I hate depending on unpredictable and having to make lottery guesses. Any problem can be solved by systems thinking and acting.
Posted: 4/21/2017 10:31 PM
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Sonia
She/Her
Joined: 12/6/2013
Posts: 435
Location: Brazil
Sorry about the late answer. Well, I did some dumping/encoding tests here, and my conclusion is that it's actually better to encode with LZO through Virtualdub than Lagarith. Here is what I did: 1) Dumped a 03:19 long movie with GZIP (Level 5) > Exported .avi with Virtualdub using Lagarith (null frames enabled) > muxed into .mkv (zlib) with mkvtoolnix. Final file size is 388MB. 2) Dumped the same movie with the same codec > Exported .avi with Virtualdub using Camstudio LZO > muxed into .mkv (zlib) with mkvtoolnix. Final file size is 129MB. So yeah, I got a smaller filesize with the second method. As I don't see an advantage in using Lagarith, I will stick to LZO since it works better for my needs.
Posted: 4/22/2017 8:01 AM
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feos
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What about their speeds?
Warning: When making decisions, I try to collect as much data as possible before actually deciding. I try to abstract away and see the principles behind real world events and people's opinions. I try to generalize them and turn into something clear and reusable. I hate depending on unpredictable and having to make lottery guesses. Any problem can be solved by systems thinking and acting.
Posted: 4/22/2017 9:45 PM
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Sonia
She/Her
Joined: 12/6/2013
Posts: 435
Location: Brazil
feos wrote:
What about their speeds?
Lagarith: Total time = 2:38 (around 65~90 fps for the most part) LZO: Total time = 4:41 (around 40~43 fps for the most part) The movie was the beginning of FFIV (Super Famicom), btw.
Posted: 4/22/2017 9:48 PM
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Aktan
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Joined: 4/23/2009
Posts: 1283
Another advantage of Lagarith, is the null frames. On some captures, there are a lot of null frames which would save a lot of space.