This is old news for most HDV users out there I am sure but I thought it might be of some intrest to some. This is just info from Cineform / Adobe on HDV
so it may, or may not, apply to Cineform / Sony. ..however since they more or less use the same thing I suspect it would be the same.
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Please be aware of the following HDV Device specific issues when exporting to tape:
• Current JVC HDV devices will not start recording until they physically detect MPEG2 data coming thru FireWire. So it is recommended for the user to insert 5-10 seconds of black in the beginning of their timeline to ensure that all of their desired video is recorded to tape.
• Current Sony HDV devices will go into Record Standby for approximately 2 seconds before starting to Record. During these 2 seconds, the timeline will already have started to stream the MPEG2 transport stream to tape resulting in the first 2 seconds of video not being recorded to tape. To correct for this, the user should insert 2-4 seconds of black in the beginning of their timeline and increase the Delay movie start time by 200-250 quarter frames
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Now next I am not sure if it is just an HDV / Cineform thing or an HDV only thing that would happen even without Cinefrom - but again - it might be of intrest:
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• At times, the first fifteen frames of a captured file may contain a few green lines running thru the video.
• At times, captured clips may contain artifacts from errors in either the MPEG2 data on tape or errors in transmission of the MPEG2 data thru FireWire. This is not correctable by Adobe Premiere Pro and may require the clip be captured again. Errors on tape will show consistent errors in the stream, though.
• The timecode in a captured clip may not be accurate. Currently it can be off by up to two frames.
• For Batch and In/Out Capture - Due to the nature of MPEG2, capture will always be initiated on the first I-frame before the requested in point. This will result in extra frames being captured and saved before the desired in point.
• When capturing video from tape that is not pre-striped the last scene may not end the capture properly. This is due to the loss of time code tracking. The capture can be manually ended and the file will be usable. Pre-striping your tapes will prevent this from occurring.
• Capture from JVC devices can exhibit timecode drift of up to fifteen frames due to MPEG-2 GOP decode errors. The drift on subsequent captures of the same material can be more accurate so recapturing is the suggested workaround.
• It is recommend to only record a single format to tape in the HDV devices. During capture of HDV if the material being captured changes from HDV to either DV or DVCAM (Sony HDR-Z1) the capture will fail.
• Please make the audio and video scratch disks the same. If they are separate there can be an error in creating the Digital Intermediate CineForm file for editing.
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so it may, or may not, apply to Cineform / Sony. ..however since they more or less use the same thing I suspect it would be the same.
=============
Please be aware of the following HDV Device specific issues when exporting to tape:
• Current JVC HDV devices will not start recording until they physically detect MPEG2 data coming thru FireWire. So it is recommended for the user to insert 5-10 seconds of black in the beginning of their timeline to ensure that all of their desired video is recorded to tape.
• Current Sony HDV devices will go into Record Standby for approximately 2 seconds before starting to Record. During these 2 seconds, the timeline will already have started to stream the MPEG2 transport stream to tape resulting in the first 2 seconds of video not being recorded to tape. To correct for this, the user should insert 2-4 seconds of black in the beginning of their timeline and increase the Delay movie start time by 200-250 quarter frames
============
Now next I am not sure if it is just an HDV / Cineform thing or an HDV only thing that would happen even without Cinefrom - but again - it might be of intrest:
===========
• At times, the first fifteen frames of a captured file may contain a few green lines running thru the video.
• At times, captured clips may contain artifacts from errors in either the MPEG2 data on tape or errors in transmission of the MPEG2 data thru FireWire. This is not correctable by Adobe Premiere Pro and may require the clip be captured again. Errors on tape will show consistent errors in the stream, though.
• The timecode in a captured clip may not be accurate. Currently it can be off by up to two frames.
• For Batch and In/Out Capture - Due to the nature of MPEG2, capture will always be initiated on the first I-frame before the requested in point. This will result in extra frames being captured and saved before the desired in point.
• When capturing video from tape that is not pre-striped the last scene may not end the capture properly. This is due to the loss of time code tracking. The capture can be manually ended and the file will be usable. Pre-striping your tapes will prevent this from occurring.
• Capture from JVC devices can exhibit timecode drift of up to fifteen frames due to MPEG-2 GOP decode errors. The drift on subsequent captures of the same material can be more accurate so recapturing is the suggested workaround.
• It is recommend to only record a single format to tape in the HDV devices. During capture of HDV if the material being captured changes from HDV to either DV or DVCAM (Sony HDR-Z1) the capture will fail.
• Please make the audio and video scratch disks the same. If they are separate there can be an error in creating the Digital Intermediate CineForm file for editing.
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