Hi
A bit earlier today, I have recorded a live band playing in a cafe bar, using my dvx100B on default program mode 5 (24p). 48khz audio. I was using an M-Audio Microtrack II digital audio recorder to record sound (set to 44,1khz - 16bit) separately of the 100b's captured sound by the on-camera mics, None of the 2 devices had a feature to sync / share TC between each other, as they were independent of each other. The plan was to edit , enhance and master the audio footage recorded by the M-audio digital recorder , then import it to Final Cut Pro and sync it on the timeline, manually with the video footage. When i have downloaded all the .wav files from the MAudio recorder, i have edited them in Cubase4 using various audio filters (EQ, Compressors / limiters etc) then exported all files as 48khz - 16bit *.wav to match FCP's video project settings, i have preserved the exact timeline and original duration of the recorded audio, in fact there were only 2 huge .wav files of about 50min each corresponding as continuous audio recording to the 2 DV tapes i have been continuously shooting with the 100b.
When i got everything set up in FCP and all the video footage of two DV tapes captured in one single clip for each, i started building up my rough footage on the timilne importing inside my FCP's video project the separately recorded wav audio files i have previously edited as additional 2 audio tracks and started manually adjusting the sync to match the videos gestures , speech, singing still with the aid of the original audio tracks captured by the 100b's on the timline. When i have managed to sync manually the separately recorded audio with the video, everything seemed to be playing "ok" untill i have advanced much further in my video clip to realize a complete desync of audio and video, the audio track has reached an important delay.. beyond 20ms, or even more! and that has just surprised me! I have now to cut and adjsut audio manually at the beginning of each song in order to have the separately edited audio properly synched with the video.
does anyone have an idea why this desync would happen? the dvx100b as well as the digital audio recorder were recording the same sound ; separately of each other but continuously , with only one interuption (when the band took a break and when i changed tape)
what could cause this anomaly ?
as more as i write about it , i can advance some possible theories:
1) the M-Audio Microtrack II might have technical issues / unsufficient technical performance at recording audio properly. some "jittering" may have occured.
2) the audio frequency setting should have been set at 48khz on the M-Audio recorder in order to match audio recorded by the 100b's
3) Steinberg Cubase 4 software did a bad job at converting / rendering the .wav audio files while exporting from 44,1khz 16bit to 48khz 16bit which altered the original's audio footage frame-length.
4) there is something unknown to me which could be something like a framerate mismatch / setting. Does audio have "FPS" as well???
but thats still impossible.. logically, the recorded sound and video footages are supposed to have the same lenght and match with each other!
uhh doh.. i still got such a lot of manual syncing job ahead :crybaby:
and why i was using the M-Audio recorder? because the M-audio does a great sound quality recording job for small live performance, and i have used it previously to record many bands playing live, i used it first time with the video.
anyone can recommend a correct way with minimum of equipment to record small live band performance ?
A bit earlier today, I have recorded a live band playing in a cafe bar, using my dvx100B on default program mode 5 (24p). 48khz audio. I was using an M-Audio Microtrack II digital audio recorder to record sound (set to 44,1khz - 16bit) separately of the 100b's captured sound by the on-camera mics, None of the 2 devices had a feature to sync / share TC between each other, as they were independent of each other. The plan was to edit , enhance and master the audio footage recorded by the M-audio digital recorder , then import it to Final Cut Pro and sync it on the timeline, manually with the video footage. When i have downloaded all the .wav files from the MAudio recorder, i have edited them in Cubase4 using various audio filters (EQ, Compressors / limiters etc) then exported all files as 48khz - 16bit *.wav to match FCP's video project settings, i have preserved the exact timeline and original duration of the recorded audio, in fact there were only 2 huge .wav files of about 50min each corresponding as continuous audio recording to the 2 DV tapes i have been continuously shooting with the 100b.
When i got everything set up in FCP and all the video footage of two DV tapes captured in one single clip for each, i started building up my rough footage on the timilne importing inside my FCP's video project the separately recorded wav audio files i have previously edited as additional 2 audio tracks and started manually adjusting the sync to match the videos gestures , speech, singing still with the aid of the original audio tracks captured by the 100b's on the timline. When i have managed to sync manually the separately recorded audio with the video, everything seemed to be playing "ok" untill i have advanced much further in my video clip to realize a complete desync of audio and video, the audio track has reached an important delay.. beyond 20ms, or even more! and that has just surprised me! I have now to cut and adjsut audio manually at the beginning of each song in order to have the separately edited audio properly synched with the video.
does anyone have an idea why this desync would happen? the dvx100b as well as the digital audio recorder were recording the same sound ; separately of each other but continuously , with only one interuption (when the band took a break and when i changed tape)
what could cause this anomaly ?
as more as i write about it , i can advance some possible theories:
1) the M-Audio Microtrack II might have technical issues / unsufficient technical performance at recording audio properly. some "jittering" may have occured.
2) the audio frequency setting should have been set at 48khz on the M-Audio recorder in order to match audio recorded by the 100b's
3) Steinberg Cubase 4 software did a bad job at converting / rendering the .wav audio files while exporting from 44,1khz 16bit to 48khz 16bit which altered the original's audio footage frame-length.
4) there is something unknown to me which could be something like a framerate mismatch / setting. Does audio have "FPS" as well???
but thats still impossible.. logically, the recorded sound and video footages are supposed to have the same lenght and match with each other!
uhh doh.. i still got such a lot of manual syncing job ahead :crybaby:
and why i was using the M-Audio recorder? because the M-audio does a great sound quality recording job for small live performance, and i have used it previously to record many bands playing live, i used it first time with the video.
anyone can recommend a correct way with minimum of equipment to record small live band performance ?
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