Crash when generating proxies in Kdenlive on iMac OSX Mavericks
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#207 Crash when generating proxies in Kdenlive on iMac OSX Mavericks
Posted the below on Kdenlive website and was advised to add it here as crash is MLT related.
bsauvage wrote:
Hello
New to Kdenlive, running it on iMac 2013 on OSX Mavericks. Installed without problem with the provided instruction - all seems well until I start creating some proxies from some GoPro videos that I took. It crashes (I think always at the same vid - it's not corrupted as far as I can see).
Note that this happens when I select a bunch of vids at the same time:
-if I select one by one and generate the proxies in this way there is no crash
-if I select 10 vids, it works
-if I select 20 vids it crashes
Log inside the dropbox link below.
https://www.dropbox.com/s/1z6jht7rc5yextx/Kdenlive%20crash%20log.rtf
Please help!
Many thanks in advance.
Reply from Steve Guilford:
The crash is within MLT...
Code: Select all
3 ??? 0000000000000000
00 0 + 0
4 libmlt.6.dylib 0x000000010704a6
99 mlt_properties_fetch +
25
5 libmlt.6.dylib 0x000000010704ab
57 mlt_properties_set_int +
55
6 libmltavformat.dylib 0x000000010f4d35
09 producer_open + 1273
7 libmltavformat.dylib 0x000000010f4d25
c8 producer_get_frame +
312
8 libmlt.6.dylib 0x000000010704fd
9b producer_get_frame +
955
9 libmlt.6.dylib 0x000000010704f0
23 mlt_service_get_frame +
147
10 libmlt.6.dylib 0x000000010704f0
23 mlt_service_get_frame +
You should cross-post on the MLT site.
You said that it loads 10 videos at a time w/out problem but crashes at 20.
Try loading 11, 12, 13, ... videos at a time and find the point where it crashes. Isolate the video that causes the problem. You need to generate more clues in order to help find the source of the problem.
bsauvage wrote:
Thanks, posting on MLT website now.
Difficult to pinpoint the video in question as doing them one by one works - rather it seems a bad interaction between certain videos (does what I say make sense? I'm not convinced myself....).
Please be clear about the steps to reproduce. Is it while creating proxies? Only by selecting? Or, after creating proxies, after selecting multiple, and then while adding them to the timeline?
It happens while creating proxies. If it helps I can also include in the
dropbox the first 20 videos that I select which generate the crash. Please
let me know.
On Tue, Mar 25, 2014 at 6:41 AM, Dan Dennedy ddennedy@users.sf.net wrote:
Related
Bugs: #207
The avformat producer in MLT has a configurable limit on the number of active concurrent instances that are running due to how caching and memory management works. And it defaults to a fairly low value. This is not confirmed yet, but it sounds like Kdenlive is exceeding that without informing MLT. Where is the kdenlive bug report or thread that led to here in case I need to route back to Kdenlive?
Is this what you're looking for ?
http://forum.kde.org/viewtopic.php?f=265&t=120261
On Tue, Mar 25, 2014 at 8:14 AM, Dan Dennedy ddennedy@users.sf.net wrote:
Related
Bugs: #207
As far as I can tell, Kdenlive is over-utilizing avformat producer concurrency by not calling mlt_service_cache_set_size(service, "producer_avformat", size) as-needed. It uses ffmpeg for the heavy-lifting of transcoding the proxy, but I believe it my be redrawing thumbnails or reloading clips to get some metadata; I am not entirely sure - Kdenlive has a lot of code, and I am not a kdenlive developer. I did not reproduce it on Linux with a version from February 15, 2014. I am not in a position to test this on OS X at the moment, and I doubt that makes a difference (although the older version might). One question, though: in Settings > Configure Kdenlive > Environment > Proxy Clips, what is Concurrent threads set to?
2
On Mon, Mar 31, 2014 at 3:25 AM, Dan Dennedy ddennedy@users.sf.net wrote:
Related
Bugs: #207