Issue with capture stage
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For a show I need to capture an incoming spout feed and after capturing, I will play the loop.
So the captured loop will come in the media library and directly play in the movie player.
I made it all work, but from time to time Isadora won’t put the captured loop in the library, although, when I capture, I can see he is capturing in the right bottom corner, but after I stop, no loop will be in the library.
I doesn’t occur always, so difficult to say what the problem is. Can anyone help me out?
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Do you notice anything about the times you are doing this that is similar? E.g., does it happen more often when you are recording short vs long clips, when you stop and start recording very rapidly, when you try to record more than one stage at the same time, etc?
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no, it’s a random thing. It happen on short or long loops. When I push record on the actor, I see him recording, but when I stop, sometimes he doesn’t take the recording in the library, although it has recorded in the folder.
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I just noticed that it works perfect on my macbook, so the problem has something to do with windows. Can it be the codec? Which codec works best? I tried mp4, which works well, but the loops are played in palindrome and mp4 has problems with that. When I switch to avi format, the problem of not taking every loop randomly comes back…
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MP4 is the preferred codec since it uses a newer Windows system, but you are correct Palindrome isn't a useable playback option with this codec.
Here are some codec specs I recorded sometime ago:
Known Bad Codecs:
- Decklink MJPEG Compressor
- Microsoft RLE
- Microsoft YUV
- Toshiba YUV
Known Working Codecs:
- DV video encoder (DS)
- Hap (vfw)
- HapA (vfw)
- HapQ (vfw)
- Intel IYUV (vfw)
- MJPEG Compressor (DS)
- MSScreen 9 Encoder (DMO)
- MS Video 1 (vfw)
- WMVideo8 encoder (DMO)
- WMVideo9 encoder (DMO)
- Black Magic HD 8 bit 4:2:2
- Black Magic 8 bit MJPEG
- Black Magic 10 bit 4:4:4
- Black Magic 10 bit 4:2:2
Performance Grid: (cpu usage comparison during record of 30 sec clip at 1280x720, 30fps, 75% quality)
Average cpu usage at runtime of test patch is 14-18% and gpu usage also 10-14% Note: all recorded values are +- 2-3% and at start of record generally have a spike in usage not included in these usage stats.
CODEC
CPU usage
GPU usage
DV video encoder (DS)
34%
13%
Hap (vfw)
52%
13%
HapA (vfw)
53%
13%
HapQ (vfw)
53%
13%
Intel IYUV (vfw) *
28%
13%
MJPEG Compressor (DS)
46%
13%
MSScreen 9 Encoder (DMO)
46%
13%
MS Video 1 (vfw)
31%
13%
WMVideo8 encoder (DMO)
47%
13%
WMVideo9 encoder (DMO)
47%
13%
Black Magic HD 8 bit 4:2:2
27%
13%
Black Magic 8 bit MJPEG
30%
13%
Black Magic 10 bit 4:4:4
30%
13%
Black Magic 10 bit 4:2:2
28%
13%
- * This video format does not playback in the correct color in Isadora since YUV support is dropped in Isadora 3
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So based on these results, I lean towards using the 8-bit BlackMagic codecs myself. (installed with free blackmagic software)
