Page 1 of 1
.flv to .mp4, no sound
Posted: 09 Aug 2016 09:39
by Valex
I'm currently running Windows 10, 64 bit with 64 bit VLC (I was running the 32 bit but realised I needed to switch yesterday, which I thought may solve my problems). I am trying to convert some .flv footage to .mp4, but whenever I do, there is not sound. I've done nearly 12 different attempts of converting it but each time there is no sound on the new file. The .flv has sound and can be watched/ heard in vlc media player itself. The sound codec is 44100 hz stereo. I've tried converting it with the "keep original audio track" ticked and unticked, I've tried many different types of audio file too but each time it comes out with no sound. If there is any other information necessary that i've missed please let me know and I'll update the post.
I've searched for a resolution but there seem to many causes for similar cases over the years so I thought I'd ask regarding my specific predicament.
p.s. I no longer record to .flv, but there is some footage I don't want to lose currently saved as .flv xD
Re: .flv to .mp4, no sound
Posted: 09 Aug 2016 11:02
by Jean-Baptiste Kempf
Don't use VLC for that, sorry.
Re: .flv to .mp4, no sound
Posted: 09 Aug 2016 11:09
by Valex
Don't use VLC for that, sorry.
As in, I shouldn't use VLC for that, or you don't?
If I shouldn't, do you know of any alternatives?
Re: .flv to .mp4, no sound
Posted: 09 Aug 2016 11:12
by Jean-Baptiste Kempf
handbrake, maybe?
Re: .flv to .mp4, no sound
Posted: 09 Aug 2016 11:27
by Valex
handbrake, maybe?
Ah I've never heard of Handbrake, I'll take a look into that, thanks.
Re: FIXED-- .flv to .mp4, no sound
Posted: 23 Nov 2017 20:46
by baylife
THE FIX: This is a common problem that can be solved by ensuring that the conversion audio bitrates matches.
Open file you wish to convert. While file is playing, under Tools, select Codec information. For notice the audio bit rate.
When you make the conversion, under settings, make sure the audio bit rate you're converting to matches.
For whatever reasons, VLC doesn't automatically downgrade audio bit rate. So if your original audio bit rate is 48000 and your audio setting is set at 44100, VLC would generate a converted file without audio!
Good luck!
Re: FIXED-- .flv to .mp4, no sound
Posted: 23 Nov 2017 21:54
by InTheWings
For whatever reasons, VLC doesn't automatically downgrade audio bit rate. So if your original audio bit rate is 48000 and your audio setting is set at 44100, VLC would generate a converted file without audio!
Good luck!
That's strange because there's part of code that supposely should trigger resampling if that differs
Code: Select all
id->p_af_chain = aout_FiltersNew( p_stream, fmt_last,
&id->p_encoder->fmt_in.audio, NULL, NULL );