Help with ffmpeg conversion, flv player not functioning.

Gune · 01-27-2009, 07:44 AM

Hey everyone, My first post here

Well anyway, i got a school project in what i use ffmpeg to convert a media file such as .avi, .mpg, .wmv and so on to .flv. The command i give ffmpeg for this is:

./ffmpeg -i file.avi -acodec libmp3lame -ab 32 -f flv file.flv

Now this works fine, Only a buffer error but thats expected with the Lame library, Works well in Vlc and so on, Both soundwize and video.
But when its inserted into the online flv player on the website it starts, but the "Progress bar" or whatever its called, The thing showing you how far into the movie you are, Does not work.
It freezes completely at the end and just don't work, Though the demo-video.flv provided with the flv player upon download works fine.

So i was wonderuing if anyone else have had this problem and got a solution? And if not, Whould you say this is a error made becouse of a faulty ffmpeg or the flv media player?
Any help appreciated.

- Gune

amani · 01-27-2009, 06:23 PM

Welcome to LQ!

#man ffmpeg

See the articles section -->Newbie at www.ilug-cal.info for a long article on ripping

H_TeXMeX_H · 01-28-2009, 01:05 PM

I know which tutorial you got that from, but they are wrong. The bitrate is in bps not kbps, so it should be 32k for 32000 and 32 for 32 (way too low).

Anyway, make sure to read:
http://ffmpeg.mplayerhq.hu/ffmpeg-doc.html

Here's a short-hand format I wrote to summarize the main options:

Code:

FFMPEG

NOTE: Start by playing the video with mplayer and get the info needed.

Global: <option, list>, (units), [default], =description, #see description

Command:
ffmpeg <infile options> -i infile <outfile options> outfile

NOTE: Try to use as few options as possible, only those that are needed, usually
just bitrate, size, codecs.

General:
	-formats
	-f <format>	=force format
	-y 			=overwrite output files
	-t <hh:mm:ss.xxx>	=duration of transcoded video sequence
	-fs #			=file size
	-ss <hh:mm:ss.xxx>	=seek
	
	-target <vcd, svcd, dvd, dv, pal-vcd, ntsc-svcd>
	-dframes # 		=number of frames to record
	-scodec <codec> 	=subtitle force
	-threads #	=number of threads

Video:
	1)	-b <bitrate> (bps) [200k]
	2)	-sameq 		=variable bitrate
	3) -qscale <q> =fixed quantizer q = 1 (best) - 31 (worst)
		-maxrate <bitrate> (bps)
		-minrate <bitrate> (bps)
	-vcodec <codec>
	-r <fps> [25]
	-s <wxh> [same as source]
	-aspect <4:3, 16:9>
	
	-crop<top, bottom, left, right> <size> (pixel)
	-pad<top, bottom, left, right> <size> (pixel)
	-pass <1, 2> =two pass encoding, for more accurate bitrates, high quality (use with '-an -f rawvideo -y /dev/null')
	-passlogfile <file>
	-padcolor (hex) [000000]
	-vframes # =number of video frames to record
	-vn =video null, disable video
	-bufsize <size> (bits) =video buffer size
	
Audio:
	-ab <bitrate> (bps) [64k]
	-ar <freq> (Hz) [44100]
	-acodec <codec>
	-async <freq> (Hz)
	-ac <# channels> [1]
	
	-aframes # =number of audio frames to record
	-an =audio null, disable audio

Gune · 01-28-2009, 04:01 PM

I tried it but with no luck, Works fine in converting though the "progress bar" thingy still gets stuck at the end not moving=(

Time for some more google'ing.

- Gune