4 Replies Latest reply on Jan 19, 2011 10:08 AM by Jim_Simon

    Interlaced H.264 Errors

    Jim_Simon Level 8

      I've been trying to create an interlaced H.264 output from my DV media for a while now.  CS4 would annoyingly turn my interlaced DV into a progressive H.264 upon export, no matter what settings I used.  I was told that got fixed in CS5, but it still seems to be doing it.

       

      I'm looking to confirm if this works for others.

       

      Start with 30i DV media in a matching sequence.

       

      Queue it up in AME using the "H.264" format and "NTSC DV High Quality" preset.

       

      Start queue.

       

      For me, it still comes out progressive, despite the Fields setting being on Lower.  This happens with hardware acceleration on or off.

       

      Can anyone confirm?

        • 1. Re: Interlaced H.264 Errors
          Colin Brougham Level 6

          Works as expected here, regardless of sequence settings or export method--I end up with a 720x480 LFF MP4. Here's a MediaInfo report on one I just ran:

           

          General
          Complete name                    : C:\_OUTPUT_\test.mp4
          Format                           : MPEG-4
          Format profile                   : Base Media / Version 2
          Codec ID                         : mp42
          File size                        : 11.4 MiB
          Duration                         : 30s 80ms
          Overall bit rate                 : 3 177 Kbps
          Encoded date                     : UTC 2011-01-19 04:01:48
          Tagged date                      : UTC 2011-01-19 04:01:48
          ©TIM                             : 00;00;00;00
          
          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                         : 30s 30ms
          Bit rate mode                    : Variable
          Bit rate                         : 2 987 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)               : 0.288
          Stream size                      : 10.7 MiB (94%)
          Language                         : English
          Encoded date                     : UTC 2011-01-19 04:01:48
          Tagged date                      : UTC 2011-01-19 04:01:48
          
          Audio
          ID                               : 2
          Format                           : AAC
          Format/Info                      : Advanced Audio Codec
          Format profile                   : LC
          Codec ID                         : 40
          Duration                         : 30s 80ms
          Bit rate mode                    : Variable
          Bit rate                         : 192 Kbps
          Maximum bit rate                 : 281 Kbps
          Channel(s)                       : 2 channels
          Channel positions                : Front: L R
          Sampling rate                    : 48.0 KHz
          Compression mode                 : Lossy
          Stream size                      : 695 KiB (6%)
          Language                         : English
          Encoded date                     : UTC 2011-01-19 04:01:48
          Tagged date                      : UTC 2011-01-19 04:01:48
          

           

          Be sure that Profile isn't being set to Baseline; you need Main or higher for MBAFF/PAFF encoding.

          • 2. Re: Interlaced H.264 Errors
            Jim_Simon Level 8

            Damn, this is frustrating.  This is now two versions of Premiere Pro (CS4 and CS5) on two separate installs of Win 7 64 bit.  I just cannot get H.264 to stop turning my interlaced DV into progressive.

             

            Can anyone else confirm proper behavior on their system?

             

            (Just for kicks, Colin, what does Gspot say about the export?)

            • 3. Re: Interlaced H.264 Errors
              Colin Brougham Level 6

              Not much...

               

              gspot.png

               

              This is why I don't really rely on GSpot any more. The file is most definitely interlaced; Premiere even interprets it as LFF if I import it back in. If you want, I can send a test clip.

              • 4. Re: Interlaced H.264 Errors
                Jim_Simon Level 8

                Please do (original DV plus export, if possible).

                 

                Your Gspot output shows the same as mine - progressive.  VLC also shows my export as progressive.  And when I watch my export on a CRT (which can show interlaced material properly) it definitely is progressive.

                 

                I'd like to throw yours on the tube also and see what's what.