Code:
rtmpdump.exe -r "rtmp://flash.as34763.net/OD/mp4:guillemots/guillemots_hard_rock_cafe_may_2011_sd.mp4" -a "OD" -y "mp4:guillemots/guillemots_hard_rock_cafe_may_2011_hd.mp4" --start 0 -o Test.flv
Code:
RTMPDump v2.3 r569 (Compiled by KSV)
(c) 2010 Andrej Stepanchuk, Howard Chu, The Flvstreamer Team; license: GPL
Connecting ...
INFO: Connected...
Starting download at: 0.000 kB
INFO: Metadata:
INFO: trackinfo:
INFO: timescale 25000.00
INFO: length 56052000.00
INFO: language eng
INFO: sampledescription:
INFO: sampletype avc1
INFO: timescale 48000.00
INFO: length 107622400.00
INFO: language eng
INFO: sampledescription:
INFO: sampletype mp4a
INFO: audiochannels 2.00
INFO: audiosamplerate 48000.00
INFO: videoframerate 25.00
INFO: aacaot 2.00
INFO: avclevel 31.00
INFO: avcprofile 77.00
INFO: audiocodecid mp4a
INFO: videocodecid avc1
INFO: width 768.00
INFO: height 432.00
INFO: frameWidth 768.00
INFO: frameHeight 432.00
INFO: displayWidth 768.00
INFO: displayHeight 432.00
INFO: moovposition 32.00
INFO: duration 2242.13
4425.462 kB / 45.67 sec (2.0%)
I downloaded and watched few minutes of this video and didn't noticed any choppiness or jumping. you can also try
remuxing (not reencoding) your flv file.