- This topic has 18 replies, 8 voices, and was last updated 5 years, 10 months ago by
.
-
Posts
-
After recording a TV broadcast that I wish to keep, I ‘top and tail’ it using VideoRedo and move it to a NAS drive. After unexpectedly capturing radio broadcasts on the series record I would like to do the same thing with these MP3 files by removing the start and finish so that I’m left with the performance and a bit of applause.
When I import the file into Audacity it seems to play at the wrong speed. I tried slowing it by 50% but it still sounds very high-pitched. Am I doing this right?
RichardR – 22 hours ago »
After recording a TV broadcast that I wish to keep, I ‘top and tail’ it … I would like to do the same thing with these MP3 files
Although the file extensions of the exported radio recordings is “MP3”, the exported audio recordings are not MP3. Some devices and softwares will play them despite the misleading file extension of MP3.
If you have converted them to MP3 then they may have got corrupted during that process.
If you have not converted the exported files to MP3 then for the Audacity route see
https://forum.audacityteam.org/viewtopic.php?t=100345#p349296
Thanks Luke. I downloaded and installed FFmpeg and confirmed that Audacity found it by looking at Preferences. I imported one of the radio recordings to Audacity and exported it as audio MP3. I closed the original file and opened the exported one. It still sounds like gobbledegook.
If you copy the radio recording to your computer (without editing) does it play properly? If so, you might be able to use mp3DirectCut (https://mpesch3.de/index.html) which will work on mp2 files (what most radio broadcasts actually are) and doesn’t recode them.
RichardR – 1 day ago »
I imported one of the radio recordings to Audacity
Before you imported it into Audacity did you change the file extension from ‘MP3’ to ‘MP2’?
No, why would I do that?
RichardR – 16 hours ago »
No, why would I do that?
Because if you did it could resolve your issue.
The exported files are not MP3 files and leaving the extension as MP3 can cause issues with some software.
Renaming the extension to “MP2” could fix your issues, and if that doesn’t correct Audacity’s play back then try “TS”.
Thanks Luke. I’ll try that at the weekend.
I have tried to replicate this scenario by recording from Radio 3. My FVP5000t saves the usual 4 files, the main one being a .ts file (transport stream) which contains the audio data. The others are .hjm, .hjtsm, .nts as with video recordings There is no mp3 file. I tried to open the .ts with VLC and convert it but that fails. VLC can play SD video files that I have extracted. And of course will not play HD files as they are encrypted. I wonder if radio recording files are also encrypted to appear as HD. (I realise that all files on the FVP are encrypted but SD are decrypted on copy whereas HD are not). Anyone know any more?
Just a thought (I don’t have a pc at the moment to check) but I recall a couple of things.
First, I think that I remember there was an option for Windows to automatically convert some files types when you import them. Perhaps this is happening without you realising?
Second, have you got Windows set to display the FULL filename? I ask this because, if it’s hidden you may(?) after editing end up with a file that is called xxxxxx.ts.mp3, or something like that.
GrahamRHK – 1 hour ago »
I have tried to replicate this scenario by recording from Radio 3. My FVP5000t saves the usual 4 files, the main one being a .ts file (transport stream) which contains the audio data. The others are .hjm, .hjtsm, .nts as with video recordings There is no mp3 file. I tried to open the .ts with VLC and convert it but that fails. VLC can play SD video files that I have extracted. And of course will not play HD files as they are encrypted. I wonder if radio recording files are also encrypted to appear as HD. (I realise that all files on the FVP are encrypted but SD are decrypted on copy whereas HD are not). Anyone know any more?
I have just tried exporting an audio file to a USB stick, and putting that into my PC.
I also get the four files as above, but if I double click on the .ts file, it plays in Windows Media Player (at normal speed). I can also open the file in Audacity, and apart from a long silence at the beginning of the recording, it plays at normal speed.
My PC is running Windows 7 Pro.
I think I have solved it. It seems that using FTP or SMB to transfer files to PC does not decrypt – but copying to USB stick on the FVP5000T does decrypt (slow operation though!). The files on the stick, perversely, are hidden when connected to my mac but once revealed will play normally and VLC will convert the .ts file to mp3. What on earth are the FTP and SMB servers for?????
GrahamRHK – 2 hours ago »
I think I have solved it. It seems that using FTP or SMB to transfer files to PC does not decrypt – but copying to USB stick on the FVP5000T does decrypt (slow operation though!). The files on the stick, perversely, are hidden when connected to my mac but once revealed will play normally and VLC will convert the .ts file to mp3. What on earth are the FTP and SMB servers for?????
You are probably right. Although, I think the problem with radio recordings could be more complex. IF, as I suspect (I can’t check because I can’t get SAMBA to work for me) the Humax is displaying a radio recording as .mp3 when it really is .ts then that could be the cause of the problem. If I try and play a decrypted radio .ts file with vlc – it works. If I rename the .ts to .mp3, vlc doesn’t work. You can’t do anything about it if you try to play (on your pc) directly from the Humax drive. If you copy the “.mp3” radio file to your pc and rename it as .ts – it might play. Alternatively, ffmpeg is clever enough to convert a wrongly suffixed .ts file to an .mp2, so you could do something like:
ffmpeg -i “<humax disk>something.mp3” -acodec copy -vn “<pc disk>something.mp2” and it should work (the mp3 file really being a ts file). If that works, you can further edit or convert the mp2 file.
The ftp server is to allow you to put video/audio/photo files onto your Humax. If you know what you are doing the DLNA server can be used to download SD and radio much quicker than trying to use a USB drive. As I can’t use the SAMBA server, I can’t comment on what use it is!
GrahamRHK – 6 hours ago »
I think I have solved it. It seems that using FTP or SMB to transfer files to PC does not decrypt.
Correct; however if you have a Windows 8 or later PC and follow Barry’s FAQ posting https://myhumax.org/forum/topic/file-transfer and look for the FV-4000T Media Server then you will get decrypted SD recordings. I suspect it uses some mechanism that combines SAMBA and DLNA but I have nver gotten round to researching exactly what is going on. As I currently can’t download the image from the FAQ I have added an old copy to this post.
[attachment=75642,1309]
If I change a file’s mp3 extension to mp2 it plays in VLC but not in Audacity.
If I change to ts it plays in the Films and TV app and VLC but Audacity does not import or open it.
- You must be logged in to reply to this topic.