The LML33 can be used for video I/O between Broadcast 2000 and analog devices.

DRIVER INSTALLATION

There are about half a dozen drivers for the LML33 each with different interfaces. Broadcast 2000 uses the "VideoStreams" driver. On a multiprocessor machine, compile the driver with make -j 1. The driver takes many options at load time for the I/O ports, bitrate, and standard. A sample installation using the S-Video ports, D1 resolution, and high quality JPEG compression is

insmod lml33 bitrate=400000 video_stream=1 video_input=2 video_output=2

You also have to create device nodes using mkvidnodes

In settings->preferences->video are the settings for video input and output. Set the paths to /dev/jvideo and set the drivers to LML33. You can optionally set just the playback or just the record to LML33.

Trying to play anything but bare MJPEG Quicktime movies to LML33 results in a blank screen.

All operations involving the LML33 must be in 720x480 resolution.

Recording from the LML33 is only possible when using Quicktime. The compressor automatically defaults to MJPG.

The record preview contains an extra button: swap fields. Since the field order on the LML33 is undefined the swap fields button allows you to define the field order manually. After recording, the field order can still be swapped by using the deinterlace plugin.

Because of the way the LML33 is designed, any glitch causes the driver to crash and reset, and usually changes the field order.

The record preview automatically previews in RGB luminance while saving data in 601 luminance. To make the video suitable for display on computers you'll need to apply the RGB <-> 601 plugin. For playing back to the LML33, leave it alone.

The LML driver buffers a certain number frames behind the audio, so after recording, you'll need to shift the video forward by several frames.

Playing video is a little more reliable. Only sections of the timeline consisting of bare Quicktime MJPA data are sent to the LML33. To get good results you must keep the output in 601 luminance. If you have a movie in RGB luminance you'll need to render it to an MJPA Quicktime movie using the RGB <-> 601 plugin. Applying any realtime plugins diverts the output from MJPA and causes a blank screen so everything must be rendered to Quicktime and loaded back in.

By default the LML33 can only play JPEG frames smaller than 128k. Any frame larger than 128k locks up the driver. You can either render all your movies in extremely low quality or increase the buffering capability of the LML driver. This can only be done when compiling the LML33 driver by enlarging lml33RamPerBoard in main.c to 0x10000 so the maximum frame size becomes 256k.