Compression - mpeg-4 encoder decoder - # macroblocks per slice

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mpeg-4 encoder decoder - # macroblocks per slice

oayran

2006-12-17, 6:55 pm

Hi, I need an mpeg-4 encoder/decoder tool that provides number of
macroblocks per slice option. I need this to increase error resilience
while streaming the media with UDP:
When streaming the media, a frame is composed of several packets
(according to MTU size), and when a packet is lost while streaming the
frame, it causes a big decrease in received frame PSNR. I want to
change number of macroblocks per slice (i.e. each slice is a
self-decodable unit) while encoding the media to increase the frame
PSNR even when some packets are lost. Currently I use ffmpeg to
encode/decode mpeg-4 and MP4Box to add streaming info on it, but since
ffmpeg does not provide #macroblocks per slice option, the received
frame PSNR is very bad even only one packet is lost.
Does anyone know such an encoder/decoder tool that works on Linux ?

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