PNG + MP3 = FLV?? how...

[frifox]

I have 480x360 PNG image and a 128Kbps MP3 file as sources. I need to make FLV (Sorenson h263) video with PNG image as a static video (1fps, keyframes every 5 frames), and with mp3 as a soundtrack. how can i do such in ffmpeg/mencoder/or maybe other cli tool? i'm writing a php script that would take user's png/mp3 and output flv for download. file size doesnt matter, max quality is the key here.

here are the source file just in case:
http://golosmira.com/sources.rar

Thanks in advance!


PS: directly muxing mp3 audio into flv without re-encoding would be a definite plus

[45tripp]

couldn't do it in a single step nicely with ffmpeg.
could be my version

ffmpeg -loop_input -i video.png -r 1 -i audio.mp3 -acodec copy -vcodec flv -qscale 2 -ab 128k -g 5 -cmp 3 -subcmp 3 -mbd 2 -flags trell frifox.avi -shortest

ffmpeg -i frifox.avi -vcodec copy -acodec copy frifox1.flv

del frifox.avi

and mencoder

mencoder mf://video.png -mf fps=1/45:type=png -audiofile audio.mp3 -ovc lavc -oac copy -vf harddup -lavcopts vcodec=flv:vqscale=2:keyint=5 -ofps 1 -of lavf -o Fri.flv

gl

[frifox]

woah, it works perfect!! thanks a lot!

during my experiments i found that ffmpeg (didnt play much with mencoder since i heard it uses ffmpeg's libraries) produces better quality vids than Sorenson Squeeze, a $500 program!!!!

[frifox]

btw here's resulting video produced by ffmpeg script above. imho its as perfect as anyone can get it...

Lossless upload:
http://www.youtube.com/watch?v=ZhCwOyvMcSw

and

Lossless 320Kbps VBR MP3 + 480x360 hifi pic:
http://www.youtube.com/watch?v=i7DM3wMViMA

[frifox]

couldn't do it in a single step nicely with ffmpeg.
could be my version

ffmpeg -loop_input -i video.png -r 1 -i audio.mp3 -acodec copy -vcodec flv -qscale 2 -ab 128k -g 5 -cmp 3 -subcmp 3 -mbd 2 -flags trell frifox.avi -shortest

ffmpeg -i frifox.avi -vcodec copy -acodec copy frifox1.flv

del frifox.avi

i noticed there is "-ab 128k" in the command, but doesnt -ab switch specifies Audio Bitrate, which is not necessary when copying the audio from mp3 without re-encoding?

[45tripp]

true,
it got left over from a previous commandline.

[frifox]

so far ffmpeg is doing a very good job, here is the command that i was using:

ffmpeg -loop_input -f image2 -i pic.png -r 1 -vcodec flv -i audio.mp3 -acodec copy -qscale 2 -g 5 -cmp 3 -subcmp 3 -mbd 2 -flags trell temp.avi -shortest

ffmpeg -i temp.avi -vcodec copy -acodec copy video.flv

lately i've been having some issues with some mp3 files.. there were couple of mp3 files which ffmpeg couldnt handle, it would simply crash with no warning. so i tried mencoder, and it processed all those mp3's without any hiccups!

so my question is, how to accomplish the above with MENCODER (aka, mux 1 PNG file with an MP3 file)?


here's what i've been trying with mencoder. my goal is to loop png file along the duration of the mp3 file., but currently mencoder just cuts everything off @ 1 second

mencoder mf://video.png -mf type=png:fps=1 -ovc lavc -lavcopts vcodec=flv:vqscale=2:keyint=5 -oac copy -audiofile audio.mp3 -vf harddup -ofps 1 -o video.flv

Thanks for the help!

[45tripp]

I already showed it to you in mencoder:

and mencoder

mencoder mf://video.png -mf fps=1/45:type=png -audiofile audio.mp3 -ovc lavc -oac copy -vf harddup -lavcopts vcodec=flv:vqscale=2:keyint=5 -ofps 1 -of lavf -o Fri.flv

you need to know the clip duration though,
you don't have ffmpeg looping,
so 45 sec was the duration of the first audio clip you provided.

change that number to the duration of each clip in seconds.

there were couple of mp3 files which ffmpeg couldnt handle, it would simply crash with no warning.

sample please.


tripp

[frifox]

there were couple of mp3 files which ffmpeg couldnt handle, it would simply crash with no warning.

sample please.

wow, i updated my ffmpeg to SVN-r12572 and the crashing problem is gone! i guess they fixed the bug :P

I already showed it to you in mencoder:

and mencoder

mencoder mf://video.png -mf fps=1/45:type=png -audiofile audio.mp3 -ovc lavc -oac copy -vf harddup -lavcopts vcodec=flv:vqscale=2:keyint=5 -ofps 1 -of lavf -o Fri.flv

you need to know the clip duration though,
you don't have ffmpeg looping,
so 45 sec was the duration of the first audio clip you provided.

ffmpeg just loops the input image until audio ends ("-shortest" argument), and as you say, mencoder cant do that... if thats true, then i guess mencoder doesnt fit my needs...

[45tripp]

you can use mencoder if you want.
just got to be a bit inventive.

@echo off

mp3info -p "%%S" v.mp3 > t.txt

set /p d= <t.txt

mencoder mf://video.png -mf fps=1/%d%:type=png -audiofile v.mp3 -ovc lavc -oac 
copy -vf harddup -lavcopts vcodec=flv:vqscale=2:keyint=5 -ofps 1 -of lavf -o Fri.flv

mp3info
http://www.ibiblio.org/mp3info/

not gonna look for the other thread,
but you can do autoscaling with ffmpeg if you plan the calc externally and use an aiding program or two
probably better to use some other language than dos batch
but there's the basic stucture of something like that here:
https://forum.videohelp.com/topic349222.html#1836387


tripp