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  1. Member
    Join Date: Feb 2006
    Location: Japan
    I have troubles encoding a PAL dvvideo stream.

    The progress bar allways stops at around 15%. The resulting video (I tried both .MP4 mpeg-4 and .MOV mpeg-4) contains the full audio stream, but a "fast-forward" version of the video stream that reaches the end after around 15% of the time.

    The conversion obviously drops frames, but I have no clue why. I made sure I added the .mov extension to the original file, and I'm using the "Decode with Quicktime" option.

    Here's the output in the terminal:

    ffmpeg version 0.4.9-pre1, build 4736, Copyright (c) 2000-2004 Fabrice Bellard
    configuration: --enable-mp3lame --enable-gpl --disable-vhook --enable-ffplay --disable-ffserver --enable-a52 --enable-xvid --enable-faac --enable-faad --enable-amr_nb --enable-amr_wb --enable-pthreads
    built on Jan 7 2005 02:34:06, gcc: 3.3 20030304 (Apple Computer, Inc. build 1666)
    Input #0, mov,mp4,m4a,3gp, from '/XYZ/Test.mov':
    Duration: 00:00:10.9, start: 0.000000, bitrate: 30477 kb/s
    Stream #0.0: Video: dvvideo, 720x576, 25.00 fps
    Stream #0.1: Audio: pcm_s16be, 48000 Hz, stereo, 1536 kb/s
    Output #0, mov, to '/XYZ/Test.mov.ff.mov':
    Stream #0.0: Video: mpeg4, 640x480, 25.00 fps, q=2-15, 2077 kb/s
    Stream #0.1: Audio: aac, 48000 Hz, stereo, 96 kb/s
    Stream mapping:
    Stream #0.0 -> #0.0
    Stream #0.1 -> #0.1
    Press [q] to stop encoding
    frame= 1 q=0.0 PSNR=Y:43.99 U:54.53 V:53.24 *:45.53 size= 18kB time=0.0 frame= 2 q=0.0 PSNR=Y:46.68 U:55.02 V:54.33 *:48.11 size= 44kB time=0.1 frame= 5 q=0.0 PSNR=Y:48.63 U:55.53 V:55.frame= 6 q=0.0 PSNR=Y:48.55 U:55.49 V:54.83 *:49.86 size= 187kB time=0.2 bitrate=6391.7kbits/s frframe= 44 q=0.0 LPSNR=Y:39.03 U:50.97 V:49.90 *:40.63 size= 912kB time=1.8 bitrate=4243.2kbits/s
    video:651kB audio:255kB global headers:0kB muxing overhead 0.635498%
    bench: utime=3.140s

    I have tried many things so far and also searched the forum, but only found the following post, which does not solve my issue: http://forum.videohelp.com/viewtopic.php?t=262704

    Any hints are very welcome.
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  2. Member
    Join Date: Feb 2006
    Location: Japan
    I have a bit more information about this now. If I export my test movie from Quicktime to a DV Stream, everything works fine. The strange thing is that the quicktime says the original movie is already a DV Stream (DV - PAL). But the converted movie (with extension .dv instead of .mov) is slightly smaller, uses a different audio format (DV instead of 16 Bit Integer, Big Endian), and does not have the problem of the dropped frames. I have tried to remove the sound track from the original movie and then convert, with the same result...
    With removed sound tracks, the two movies (dv and mov) differ only by a few bytes in size. Another difference is that for the mov, I can get the info window displaying something in ffmpegX, for the dv, the window does not show up. Here is the content for the mov:

    Fourcc: pcvd Codec: 'DV - PAL'
    [V] filefmt:7 fourcc:0x7063776 size 720x576 fps:25.00 ftime:=0.0400

    I cannot get more details about the nature of the movie that causes the problem in Quicktime. They seem to be in the same format. The movie was produced with iMovie, setting quality to maximum.

    What I really do not understand is why "Decode with QT" does not solve this issue. It seems to behave exactly the same, wether I use it or not.

    I wonder if there is a solution to this problem?

    Any help with this is be greatly appreciated.
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