QTCONV(1)

NAME
qtconv - A collection of programs for manipulating QuickTime videos.

SYNOPSIS
22 July 2001

qtconv [option]...

DESCRIPTION

 Qtconv is a program which will change the codecs used by a QuickTime file. The codecs supported are those used by the QuickTime for Linux: http://www.heroinewarrior.com/quicktime.php3 library. Files can easily be re-encoded by qtconv from the command line.

ima4
    The ima4 compressor reduces 16 bit audio data to ¼ size, with very good quality. This is the preferred codec for low bandwidth audio.

raw Unsigned 8 bit encoding.

twos
    Twos is the preferred encoding for audio. It stores 8, 16, and 24 bit audio, interleaved for multiple channels. The 8 bit mode is signed. The 16 and 24 bit modes are big endian signed.

raw RGB packed frames.

jpeg
    JPEG is preferred for low bandwidth video. This format writes a seperate JPEG photo for every frame.

mjpa
    MJPA stores each frame as two JPEGs, interlaced. The real advantage is that it can split compression and decompression across 2 processors, doubling the frame rate.

png This consists of one PNG image for every frame. Like ram this codec supports 32 bit depths.

yuv2
    The human eye percieves brightness much more accurately than colors. YUV2 downsamples the color components by 50% for a total compression of 33% with virtually no image degredation. This is preferred for intermediate storage. YUV2 is sometimes called Component video.

yuv4
    YUV4 is planar YUV, identical to MPEG. It downsamples the color components by 75% for a total 50% compression. This is the preferred intermediate format for working with MPEG.

OPTIONS

-h, --help
    Print a list of options

-a, --audio=codec
    Set target audio codec

-v, --video=codec
    Set target video codec

-i, --input=path
    Set the input QuickTime file

-o, --output=path
    Set the output QuickTime file

-q, --quality=int
    Set the quality used for JPEG or MJPA encoding

-c, --cpus=int
    Set the number of CPUs to use for MJPA encoding

AUTHORS

E-Mail
    <qtutils@flyn.org>

HTTP
    Flyn Computing: http://www.flyn.org