Any preset for Theora format on ffmpeg ?

[richter03]

I'm try to convert my video from H264 to Theora but size is very large (4 - 8 times of H264 : High10 10bit).
Could it be someway to make it's size nearly H264 without quality drop ?

[jman98]

Why on earth would you want to convert to Theora from H.264? You do understand that doing so will only lessen the quality, right? Support for Theora outside of PCs borders on non-existent.

[bat999]

Could it be someway to make it's size nearly H264 without quality drop ?

No, higher bitrates are needed for theora than x264.
So, for same quality, theora will make bigger files.

[richter03]

Thanks bat999, seem like Theora has been left be hide

@jman98, Html5 video on web for Opera and Firefox without flash or Youtube

[jman98]

@jman98, Html5 video on web for Opera and Firefox without flash or Youtube

Fair enough. Just wanted to be sure you weren't operating under some delusion that doing this kind of encoding was somehow going to make your videos better.

[bat999]

I'm try to convert my video from H264 to Theora but size is very large (4 - 8 times of H264 : High10 10bit).

What command are you using with FFmpeg?

[richter03]

Thanks for suggestion, jman98

What command are you using with FFmpeg?

ffmpeg.exe  -i "movie.h264" -vcodec libtheora -b:v 200000k  -an -sn -y movie.ogv

Since I know nothing about manual setting so I leave it to program but I set bitrate a little bit high(but I feel like I set maxrate insert force bitrate to it) to make sure output video's not going to drop their quality.

[bat999]

Since I know nothing about manual setting so I leave it to program but I set bitrate a little bit high...

Hi
You might get better sized files with "quality" instead of "bitrate".
Something like this:-

ffmpeg.exe -i "movie.h264" -c:v libtheora -q:v 5 -an -sn -y movie.ogv

(-q:v 10 is "best" quality with theora)

[richter03]

Thank you, bat99
Theora size still huge no matter what I try so I'm move to Vp8 but still have to sacrifice some video's quality

ffmpeg -i <INPUT_FILE.mvk> -threads 4 -vcodec libvpx -quality best -g 120 -level 216 -profile 0 -qmax 42 -qmin 10 -rc_buf_aggressivity 0.95 -vb 200M -acodec libvorbis -y<OUTPUT_FILE.webm>

[zoobie]

See how far you get with VLC

[Baldrick]

Maybe try ffmpeg2theora

[richter03]

Maybe try ffmpeg2theora

I love to try but isn't it 16bit program ?
And most make me shock when I try to download it at http://v2v.cc/~j/ffmpeg2theora/download.html window defender warn me it's might be some of virus !?

See how far you get with VLC

Thanks for suggestion, I will try it late (but personally I don't think it can surpass ffmpeg)

[Selur]

window defender warn me it's might be some of virus !?

Microsoft Security Essentials on Win7 doesn't (http://v2v.cc/~j/ffmpeg2theora/download.html)

I love to try but isn't it 16bit program ?

should be a 32bit application, why do you think it's a 16bit application?

[richter03]

@Selur
I use Windows 8 CP and it's said this program is 16bit when I run it(the one I download from this site)

[Selur]

strange, thought it was a 32bit application, but even if it's a 16bit application there's no real reason to avoid it based on that,... the warning of windows defender concerns me more,.. to be sure you can upload the version you used to: https://www.virustotal.com/

[bat999]

Hi
I don't see how ffmpeg2theora will be able to produce smaller files than FFmpeg.

These two commands are equivalent:-

ffmpeg2theora -v 7 -a 3 filename -o filename1.ogv

is the same as

ffmpeg -i filename -c:v libtheora -q:v 7 -c:a libvorbis -q:a 3 filename2.ogv

[richter03]

@Selur
Window defender stop me to download ffmpeg2theora(it's cancel my download task immediately) even if I try to download program seem not complete.
I use Opera 12.02 and last time I try to download from https://www.videohelp.com/download/ffmpeg2theora-0.29.exe

@bat999
Thanks for your test's result

[poisondeathray]

<EDIT: sorry I see you've already suggested VP8>

But theora is garbage. It's about as good as xvid