8 Replies Latest reply on Oct 7, 2010 10:51 AM by Jim_Simon

    Missing Fields

    Jim_Simon Level 8

      I've run into an anomaly that I can't explain.  I'm looking to find out if anyone can duplicate this.

       

      Whatever you start with, choose the H.264 export option, NTSC DV High Quality preset.  You will notice that Field Order is properly set to Lower.  Export.

       

      The resultant file is progressive, not LFF as it should be with those settings.

        • 1. Re: Missing Fields
          Ann Bens Adobe Community Professional & MVP

          If you put the mp4 back into Premiere it will interprete it as LFF.

          Which program are you using to interprete the footage?

          • 2. Re: Missing Fields
            Colin Brougham Level 6

            I can't confirm this, unfortunately. Just did an export of a DV sequence to that particular preset, and spot-checked the file visually and with MediaInfo. The player window shows telltale interlace lines, and here's the MediaInfo report:

             

            General
            Complete name                    : D:\_OUTPUT_\file.mp4
            Format                           : MPEG-4
            Format profile                   : Base Media / Version 2
            Codec ID                         : mp42
            File size                        : 12.9 MiB
            Duration                         : 36s 74ms
            Overall bit rate                 : 3 007 Kbps
            Encoded date                     : UTC 2010-10-06 19:28:46
            Tagged date                      : UTC 2010-10-06 19:28:46
            ©TIM                             : 00;00;00;00
            ©TSC                             : 30000
            ©TSZ                             : 1001

            Video
            ID                               : 1
            Format                           : AVC
            Format/Info                      : Advanced Video Codec
            Format profile                   : Main@L3.1
            Format settings, CABAC           : Yes
            Format settings, ReFrames        : 3 frames
            Codec ID                         : avc1
            Codec ID/Info                    : Advanced Video Coding
            Duration                         : 36s 36ms
            Bit rate mode                    : Variable
            Bit rate                         : 2 716 Kbps
            Width                            : 720 pixels
            Height                           : 480 pixels
            Display aspect ratio             : 4:3
            Frame rate mode                  : Constant
            Frame rate                       : 29.970 fps
            Standard                         : NTSC
            Color space                      : YUV
            Chroma subsampling               : 4:2:0
            Bit depth                        : 8 bits
            Scan type                        : Interlaced
            Scan order                       : Bottom Field First
            Bits/(Pixel*Frame)               : 0.262
            Stream size                      : 11.7 MiB (90%)
            Language                         : English
            Encoded date                     : UTC 2010-10-06 19:28:46
            Tagged date                      : UTC 2010-10-06 19:28:46

            Audio
            ID                               : 2
            Format                           : AAC
            Format/Info                      : Advanced Audio Codec
            Format version                   : Version 4
            Format profile                   : LC
            Format settings, SBR             : No
            Codec ID                         : 40
            Duration                         : 36s 74ms
            Bit rate mode                    : Variable
            Bit rate                         : 192 Kbps
            Maximum bit rate                 : 278 Kbps
            Channel(s)                       : 2 channels
            Channel positions                : Front: L R
            Sampling rate                    : 48.0 KHz
            Stream size                      : 834 KiB (6%)
            Language                         : English
            Encoded date                     : UTC 2010-10-06 19:28:46
            Tagged date                      : UTC 2010-10-06 19:28:46

             

            What player/program is reporting the file as progressive?

            • 3. Re: Missing Fields
              Ann Bens Adobe Community Professional & MVP

              If you play the file in VLC or QT it looks interlaced.

              • 4. Re: Missing Fields
                Jim_Simon Level 8

                Which program are you using to interprete the footage?

                 

                I noticed something amiss when I tried to play the file on a CRT set and used G-Spot to confirm the existence of frames instead of fields.

                 

                I am still using CS4.  It seems like the issue was corrected for CS5.  However, if anyone reading still has CS4, I'd appreciate a little test to verify the issue.

                • 5. Re: Missing Fields
                  Colin Brougham Level 6

                  I am still using CS4.  It seems like the issue was corrected for CS5.

                   

                  Tsk, tsk... you're posting in the wrong forum, mister!

                   

                  Actually, I think you're correct, because I seem to remember running into the same issue with CS4. The local broadcasters seem to be happy with H.264 files, and that works for me because they can be compressed to smaller file sizes than other formats and still look decent. However, when needing an interlaced export, I recall the CS4 would deinterlace the file, regardless of the field setting--this made it completely useless when the upload requirements (and the source material) are interlaced.

                   

                  I remember that I started using MPEG StreamClip to export QuickTime MOVs with the H.264 codec, and the quality was (and is) excellent. I have had great results using it for broadcast spots; I know you're anti-everything-QT, and I'm not sure if this is the kind of deliverable you're making, but it's definitely worth checking out if that's what you have to do.

                  • 6. Re: Missing Fields
                    Jim_Simon Level 8

                    I did post here specifically to find out if CS5 had the issue.  Nice to know it doesn't.

                     

                    These aren't deliverables, precisely.  My new Blu-ray can play files off a thumb drive.  I thought I might try using it for review purposes.  The final deliverable is still DVD.

                     

                    The Blu-ray can also play MPEG-2 files, but they don't fit on my modest 2GB USB drive.  Guess I'm off to get a bigger one...

                    • 7. Re: Missing Fields
                      Colin Brougham Level 6

                      Got it. For giggles, try sending your sequence to After Effects (or spit out an uncompressed version from Premiere and load that into AE so you don't have to deal with missing effects, etc.) and add that comp to the render queue; see if you can generate an LFF H.264 from there. I don't have CS4 installed or I'd try this.

                      • 8. Re: Missing Fields
                        Jim_Simon Level 8

                        Were this something I actually needed, I might give it a go.  But the double export kind of eats up the time I'd save by transferring to USB instead of burning.