[FFmpeg-user] Problem rewrapping DV in MOV

[Ganesh.Irelan at syda.org]

    Den 31.10.2024 14:22, skrev Bouke / Videotoolshed:
    >
    >> On 31 Oct 2024, at 14:07, Ganesh.Irelan--- via ffmpeg-user<ffmpeg-user at ffmpeg.org> wrote:
    >>
    >>> On 29 Oct 2024, at 15:16, Ganesh.Irelan--- via ffmpeg-user<ffmpeg-user at ffmpeg.org> wrote:
    >>>
    >>> Hello
    >>>
    >>> I have .dv files captured from DV videotapes with vrecord.  The .dv files play fine in Quicktime Player 10 but are not supported by Premier Pro or FCP.  I want to wrap the DV stream from the .dv files into Quicktime MOV (without transcoding) so they can be imported into Premier Pro.  FFMPEG rewraps the stream but when played in Quicktime, VLC, and Premier Pro there are narrow black vertical bars on the left and right edges of the frame.  It looks like the production aperture 720x480 is being displayed instead of the clean aperture 704x480 but that’s just a guess.  Can someone tell me an FFMPEG command that will result in MOV wrapped DV that displays without the vertical borders?
    >>>
    >>> This is what I tried.
    >>>
    >>> 3137-Mac-Pro-DAM:~ kirelan$ ffmpeg -i 36058.dv -map 0 -c copy https://linkprotect.cudasvc.com/url?a=https%3a%2f%2f36058_Rewrap.mov&c=E,1,MRkvkS39-zgTkJ-K5W4-UyKGIg2ThAghA0qSN2gma2vo3HBa4PNwZ2_dO8yIrVCim8Zw4OLBPuu2Haf0hdVK4LhqcreHbwIlvG0cgCXuCGyYlOEVpLhh&typo=1
    >>    _______________________________________________
    >>
    >>> On 10/29/24, 10:28 AM, "ffmpeg-user on behalf of Bouke / Videotoolshed"<ffmpeg-user-bounces at ffmpeg.org on behalf of bouke at videotoolshed.com> wrote:
    >>>   Try adding -aspect 4:3 (or 16:9 of course)
    >>>   Bouke
    >>    _______________________________________________
    >>
    >> Thanks for your reply.  A dv wrapped .mov file was created but it only contained the first 17 minutes of the 39 minute source.  The resulting file was viewable and did not have the unwanted vertical bars but, ultimately, the conversion failed.
    > No clue in your case, but a captured DV tape can contain glitches that might interfere.
    > Watch the DV stream around the part where the re-wrap stopped.
    >
    >
    > Bouke

_______________________________________________
>On 10/31/24, 11:24 AM, "ffmpeg-user on behalf of Terje J. Hanssen" <ffmpeg-user-bounces at ffmpeg.org on behalf of terjejhanssen at gmail.com> wrote:

>    Sometimes it may help to first reset the timestamps:

 >  fmpeg -i 36058.dv -reset_timestamps 1 -c copy 36058_reset.dv

 >   Terje J. H

    _______________________________________________

Apparently FFMPEG only writes a CLAP atom for certain codecs and DV is not one of them.  That explains why the production aperture is displayed when I play back a DV wrapped MOV file created by it.  Using JES Extensifier I manually entered a CLAP atom into one of the files created by FFMPEG and it displays correctly in playback.  Is there a way to manually specify that a CLAP atom be written during the conversion with FFMPEG?   

Thank you
Kevin