Today I recorded several files, and discovered later that only 3 to 4 seconds were recorded each time. Here's the log file; I appreciate any suggestions. Also, video is jerky and freezes, though that isn't apparent at the time I'm recording.
16:21:34.037: OBS 0.11.2 (mac)
16:21:34.037: ---------------------------------
16:21:34.246: CPU Name: Intel(R) Core(TM) i3 CPU 550 @ 3.20GHz
16:21:34.246: CPU Speed: 3200MHz
16:21:34.246: Physical Cores: 2, Logical Cores: 4
16:21:34.246: Physical Memory: 12288MB Total
16:21:34.246: OS Name: Mac OS X (NSMACHOperatingSystem)
16:21:34.247: OS Version: Version 10.10.4 (Build 14E46)
16:21:34.247: Kernel Version: 14.4.0
16:21:34.249: hotkeys-cocoa: Using layout 'com.apple.keylayout.US'
16:21:34.283: ---------------------------------
16:21:34.283: audio settings reset:
16:21:34.283: samples per sec: 44100
16:21:34.283: speakers: 2
16:21:34.283: buffering (ms): 1000
16:21:34.368: ---------------------------------
16:21:34.368: video settings reset:
16:21:34.368: base resolution: 2560x1440
16:21:34.368: output resolution: 1280x720
16:21:34.368: fps: 48/1
16:21:34.368: format: NV12
16:21:34.371: ---------------------------------
16:21:34.371: Loading module: coreaudio-encoder.so
16:21:34.373: ---------------------------------
16:21:34.373: Loading module: image-source.so
16:21:34.375: ---------------------------------
16:21:34.375: Loading module: mac-avcapture.so
16:21:34.377: ---------------------------------
16:21:34.377: Loading module: mac-capture.so
16:21:34.380: ---------------------------------
16:21:34.380: Loading module: mac-decklink.so
16:21:34.380: No blackmagic support
16:21:34.380: Failed to start search for DeckLink devices
16:21:34.384: ---------------------------------
16:21:34.384: Loading module: mac-syphon.so
16:21:34.386: ---------------------------------
16:21:34.386: Loading module: obs-ffmpeg.so
16:21:34.388: ---------------------------------
16:21:34.388: Loading module: obs-filters.so
16:21:34.390: ---------------------------------
16:21:34.390: Loading module: obs-outputs.so
16:21:34.392: ---------------------------------
16:21:34.392: Loading module: obs-x264.so
16:21:34.394: ---------------------------------
16:21:34.394: Loading module: rtmp-services.so
16:21:34.396: ---------------------------------
16:21:34.396: Loading module: text-freetype2.so
16:21:35.163: =====================================================================
16:21:35.230: output 'adv_stream' (rtmp_output) created
16:21:35.230: output 'adv_file_output' (ffmpeg_muxer) created
16:21:35.230: encoder 'recording_h264' (obs_x264) created
16:21:35.230: encoder 'streaming_h264' (obs_x264) created
16:21:35.293: AAC encoder bitrate mapping:
16:21:35.293: 20 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 24 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 28 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 32 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 40 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 48 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 56 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 64 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 72 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 80 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 96 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 112 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 128 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 144 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 160 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 192 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 224 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 256 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 288 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 320 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.294: encoder 'adv_aac0' (CoreAudio_AAC) created
16:21:35.295: encoder 'adv_aac1' (CoreAudio_AAC) created
16:21:35.295: encoder 'adv_aac2' (CoreAudio_AAC) created
16:21:35.295: encoder 'adv_aac3' (CoreAudio_AAC) created
16:21:35.308: service 'default_service' (rtmp_common) created
16:21:35.360: All scene data cleared
16:21:35.360: ------------------------------------------------
16:21:35.429: coreaudio: device 'Built-in Input' initialized
16:21:35.429: source 'Mic/Aux' (coreaudio_input_capture) created
16:21:35.443: source 'logo' (image_source) created
16:21:35.443: source 'Camera 2' (scene) created
16:21:35.443: source 'Camera 1' (scene) created
16:21:35.444: source 'Open' (scene) created
16:21:35.444: source 'Open card' (image_source) created
16:21:35.444: source 'Close' (scene) created
16:21:35.444: source 'close card' (image_source) created
16:21:35.626: Video Capture Device 1: Selected device 'HD Pro Webcam C920'
16:21:35.663: Video Capture Device 1: Using preset 960x540
16:21:36.053: source 'Video Capture Device 1' (av_capture_input) created
16:21:36.053: Video Capture Device 2: Selected device 'HD Pro Webcam C920 #2'
16:21:36.053: Video Capture Device 2: Using preset 1280x720
16:21:36.214: source 'Video Capture Device 2' (av_capture_input) created
16:21:36.214: source 'browser' (scene) created
16:21:36.216: source 'Window Capture' (window_capture) created
16:21:36.253: source 'Crop' (crop_filter) created
16:21:44.300: ---------------------------------
16:21:44.300: [x264 encoder: 'recording_h264'] preset: placebo
16:21:44.320: [x264 encoder: 'recording_h264'] settings:
16:21:44.320: bitrate: 2500
16:21:44.320: buffer size: 2500
16:21:44.320: fps_num: 48
16:21:44.320: fps_den: 1
16:21:44.320: width: 1280
16:21:44.320: height: 720
16:21:44.320: keyint: 250
16:21:44.320: vfr: off
16:21:44.320: cbr: on
16:21:44.348: [CoreAudio AAC: 'Track1']: Trying format kAudioFormatMPEG4AAC_HE_V2 (0x61616370)
16:21:44.349: [CoreAudio AAC: 'Track1']: Encoder does not support bitrate 160000 for format kAudioFormatMPEG4AAC_HE_V2 (0x61616370)
16:21:44.349: [CoreAudio AAC: 'Track1']: Trying format kAudioFormatMPEG4AAC_HE (0x61616368)
16:21:44.350: [CoreAudio AAC: 'Track1']: Encoder does not support bitrate 160000 for format kAudioFormatMPEG4AAC_HE (0x61616368)
16:21:44.350: [CoreAudio AAC: 'Track1']: Trying format kAudioFormatMPEG4AAC (0x61616320)
16:21:44.352: [CoreAudio AAC: 'Track1']: settings:
16:21:44.352: mode: AAC
16:21:44.352: bitrate: 160
16:21:44.352: sample rate: 44100
16:21:44.352: cbr: on
16:21:44.352: output buffer: 1536
16:21:44.353: ==== Recording Start ===============================================
16:21:44.353: [ffmpeg muxer: 'adv_file_output'] Writing file '/Users/davidetler/Movies/2015-08-13 16-21-44.mp4'...
16:22:32.805: [ffmpeg muxer: 'adv_file_output'] Output of file '/Users/davidetler/Movies/2015-08-13 16-21-44.mp4' stopped
16:22:32.805: ==== Recording Stop ================================================
16:22:32.805: Output 'adv_file_output': stopping
16:22:32.805: Output 'adv_file_output': Total frames: 2325
16:22:32.805: Output 'adv_file_output': Number of skipped frames: 1372 (59.0108%)
16:23:35.258: source 'Mic/Aux' destroyed
16:23:35.306: source 'Camera 2' destroyed
16:23:35.306: source 'Camera 1' destroyed
16:23:35.306: source 'logo' destroyed
16:23:35.306: source 'Open' destroyed
16:23:35.306: source 'Open card' destroyed
16:23:35.306: source 'Close' destroyed
16:23:35.306: source 'close card' destroyed
16:23:35.306: source 'Video Capture Device 1' destroyed
16:23:35.681: source 'Video Capture Device 2' destroyed
16:23:36.139: source 'browser' destroyed
16:23:36.139: source 'Crop' destroyed
16:23:36.140: source 'Window Capture' destroyed
16:23:36.140: All scene data cleared
16:23:36.140: ------------------------------------------------
16:23:36.148: service 'default_service' destroyed
16:23:36.148: encoder 'recording_h264' destroyed
16:23:36.285: encoder 'streaming_h264' destroyed
16:23:36.285: encoder 'Track4' destroyed
16:23:36.285: encoder 'Track3' destroyed
16:23:36.285: encoder 'Track2' destroyed
16:23:36.285: encoder 'Track1' destroyed
16:23:36.285: output 'adv_stream' destroyed
16:23:36.285: output 'adv_file_output' destroyed
16:23:36.288: Freeing OBS context data
16:23:36.437: Number of memory leaks: 0
16:21:34.037: OBS 0.11.2 (mac)
16:21:34.037: ---------------------------------
16:21:34.246: CPU Name: Intel(R) Core(TM) i3 CPU 550 @ 3.20GHz
16:21:34.246: CPU Speed: 3200MHz
16:21:34.246: Physical Cores: 2, Logical Cores: 4
16:21:34.246: Physical Memory: 12288MB Total
16:21:34.246: OS Name: Mac OS X (NSMACHOperatingSystem)
16:21:34.247: OS Version: Version 10.10.4 (Build 14E46)
16:21:34.247: Kernel Version: 14.4.0
16:21:34.249: hotkeys-cocoa: Using layout 'com.apple.keylayout.US'
16:21:34.283: ---------------------------------
16:21:34.283: audio settings reset:
16:21:34.283: samples per sec: 44100
16:21:34.283: speakers: 2
16:21:34.283: buffering (ms): 1000
16:21:34.368: ---------------------------------
16:21:34.368: video settings reset:
16:21:34.368: base resolution: 2560x1440
16:21:34.368: output resolution: 1280x720
16:21:34.368: fps: 48/1
16:21:34.368: format: NV12
16:21:34.371: ---------------------------------
16:21:34.371: Loading module: coreaudio-encoder.so
16:21:34.373: ---------------------------------
16:21:34.373: Loading module: image-source.so
16:21:34.375: ---------------------------------
16:21:34.375: Loading module: mac-avcapture.so
16:21:34.377: ---------------------------------
16:21:34.377: Loading module: mac-capture.so
16:21:34.380: ---------------------------------
16:21:34.380: Loading module: mac-decklink.so
16:21:34.380: No blackmagic support
16:21:34.380: Failed to start search for DeckLink devices
16:21:34.384: ---------------------------------
16:21:34.384: Loading module: mac-syphon.so
16:21:34.386: ---------------------------------
16:21:34.386: Loading module: obs-ffmpeg.so
16:21:34.388: ---------------------------------
16:21:34.388: Loading module: obs-filters.so
16:21:34.390: ---------------------------------
16:21:34.390: Loading module: obs-outputs.so
16:21:34.392: ---------------------------------
16:21:34.392: Loading module: obs-x264.so
16:21:34.394: ---------------------------------
16:21:34.394: Loading module: rtmp-services.so
16:21:34.396: ---------------------------------
16:21:34.396: Loading module: text-freetype2.so
16:21:35.163: =====================================================================
16:21:35.230: output 'adv_stream' (rtmp_output) created
16:21:35.230: output 'adv_file_output' (ffmpeg_muxer) created
16:21:35.230: encoder 'recording_h264' (obs_x264) created
16:21:35.230: encoder 'streaming_h264' (obs_x264) created
16:21:35.293: AAC encoder bitrate mapping:
16:21:35.293: 20 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 24 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 28 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 32 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 40 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 48 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 56 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 64 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 72 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 80 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 96 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 112 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 128 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 144 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 160 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 192 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 224 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 256 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 288 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.293: 320 kbit/s: 'CoreAudio AAC encoder' (CoreAudio_AAC)
16:21:35.294: encoder 'adv_aac0' (CoreAudio_AAC) created
16:21:35.295: encoder 'adv_aac1' (CoreAudio_AAC) created
16:21:35.295: encoder 'adv_aac2' (CoreAudio_AAC) created
16:21:35.295: encoder 'adv_aac3' (CoreAudio_AAC) created
16:21:35.308: service 'default_service' (rtmp_common) created
16:21:35.360: All scene data cleared
16:21:35.360: ------------------------------------------------
16:21:35.429: coreaudio: device 'Built-in Input' initialized
16:21:35.429: source 'Mic/Aux' (coreaudio_input_capture) created
16:21:35.443: source 'logo' (image_source) created
16:21:35.443: source 'Camera 2' (scene) created
16:21:35.443: source 'Camera 1' (scene) created
16:21:35.444: source 'Open' (scene) created
16:21:35.444: source 'Open card' (image_source) created
16:21:35.444: source 'Close' (scene) created
16:21:35.444: source 'close card' (image_source) created
16:21:35.626: Video Capture Device 1: Selected device 'HD Pro Webcam C920'
16:21:35.663: Video Capture Device 1: Using preset 960x540
16:21:36.053: source 'Video Capture Device 1' (av_capture_input) created
16:21:36.053: Video Capture Device 2: Selected device 'HD Pro Webcam C920 #2'
16:21:36.053: Video Capture Device 2: Using preset 1280x720
16:21:36.214: source 'Video Capture Device 2' (av_capture_input) created
16:21:36.214: source 'browser' (scene) created
16:21:36.216: source 'Window Capture' (window_capture) created
16:21:36.253: source 'Crop' (crop_filter) created
16:21:44.300: ---------------------------------
16:21:44.300: [x264 encoder: 'recording_h264'] preset: placebo
16:21:44.320: [x264 encoder: 'recording_h264'] settings:
16:21:44.320: bitrate: 2500
16:21:44.320: buffer size: 2500
16:21:44.320: fps_num: 48
16:21:44.320: fps_den: 1
16:21:44.320: width: 1280
16:21:44.320: height: 720
16:21:44.320: keyint: 250
16:21:44.320: vfr: off
16:21:44.320: cbr: on
16:21:44.348: [CoreAudio AAC: 'Track1']: Trying format kAudioFormatMPEG4AAC_HE_V2 (0x61616370)
16:21:44.349: [CoreAudio AAC: 'Track1']: Encoder does not support bitrate 160000 for format kAudioFormatMPEG4AAC_HE_V2 (0x61616370)
16:21:44.349: [CoreAudio AAC: 'Track1']: Trying format kAudioFormatMPEG4AAC_HE (0x61616368)
16:21:44.350: [CoreAudio AAC: 'Track1']: Encoder does not support bitrate 160000 for format kAudioFormatMPEG4AAC_HE (0x61616368)
16:21:44.350: [CoreAudio AAC: 'Track1']: Trying format kAudioFormatMPEG4AAC (0x61616320)
16:21:44.352: [CoreAudio AAC: 'Track1']: settings:
16:21:44.352: mode: AAC
16:21:44.352: bitrate: 160
16:21:44.352: sample rate: 44100
16:21:44.352: cbr: on
16:21:44.352: output buffer: 1536
16:21:44.353: ==== Recording Start ===============================================
16:21:44.353: [ffmpeg muxer: 'adv_file_output'] Writing file '/Users/davidetler/Movies/2015-08-13 16-21-44.mp4'...
16:22:32.805: [ffmpeg muxer: 'adv_file_output'] Output of file '/Users/davidetler/Movies/2015-08-13 16-21-44.mp4' stopped
16:22:32.805: ==== Recording Stop ================================================
16:22:32.805: Output 'adv_file_output': stopping
16:22:32.805: Output 'adv_file_output': Total frames: 2325
16:22:32.805: Output 'adv_file_output': Number of skipped frames: 1372 (59.0108%)
16:23:35.258: source 'Mic/Aux' destroyed
16:23:35.306: source 'Camera 2' destroyed
16:23:35.306: source 'Camera 1' destroyed
16:23:35.306: source 'logo' destroyed
16:23:35.306: source 'Open' destroyed
16:23:35.306: source 'Open card' destroyed
16:23:35.306: source 'Close' destroyed
16:23:35.306: source 'close card' destroyed
16:23:35.306: source 'Video Capture Device 1' destroyed
16:23:35.681: source 'Video Capture Device 2' destroyed
16:23:36.139: source 'browser' destroyed
16:23:36.139: source 'Crop' destroyed
16:23:36.140: source 'Window Capture' destroyed
16:23:36.140: All scene data cleared
16:23:36.140: ------------------------------------------------
16:23:36.148: service 'default_service' destroyed
16:23:36.148: encoder 'recording_h264' destroyed
16:23:36.285: encoder 'streaming_h264' destroyed
16:23:36.285: encoder 'Track4' destroyed
16:23:36.285: encoder 'Track3' destroyed
16:23:36.285: encoder 'Track2' destroyed
16:23:36.285: encoder 'Track1' destroyed
16:23:36.285: output 'adv_stream' destroyed
16:23:36.285: output 'adv_file_output' destroyed
16:23:36.288: Freeing OBS context data
16:23:36.437: Number of memory leaks: 0