[mythtv-users] issue playing mp3 using Internal player
stephen_agent at jsw.gen.nz
Wed Mar 25 03:14:11 UTC 2020
On Tue, 24 Mar 2020 22:03:16 -0500 (CDT), you wrote:
>On Wed, 25 Mar 2020, Stephen Worthington wrote:
>> Yes, creating a playable video file that way has its problems. I did
>> that for my mother's opera recordings that I used to do from an FM
>> radio station. I did work out what settings to use to create a
>> playable file, but that was a very long time ago and the way I did it
>> back then does not work now with newer versions of MythTV. But the
>> settings to make ffmpeg create a file MythTV can play may still work.
>> I actually used avconv instead of ffmpeg and here is the command I
>> avconv -loglevel quiet -f image2 -loop 1 -r 25 -i:v:0
>> /usr/local/bin/audio_only.jpg -f s16le -channels 2 -ar 48000 -i:a:1
>> /dev/video24 -f mpegts -map 0:v -vcodec libx264 -map 1:a -acodec aac
>> -ab 512k -strict experimental -shortest $recording_file
>> What that is doing is recording audio from the /dev/video24 device (of
>> a Hauppauge PVR-150 card with FM) and adding a looping video image
>> from the /usr/local/bin/audio_only.jpg file. The output is an MPEG2
>> transport stream file (.ts) with AAC audio and H.264 video, similar to
>> the DVB-T broadcast programs we record here in New Zealand.
>> Of course, since it is a long time ago, I am not sure that such a file
>> will still play properly, but it is likely. The downside of your
>> using the above conversion is that it would convert the audio from MP3
>> format to AAC format. So, as with all lossy conversions, the quality
>> will be reduced a bit.
>Thanks for the interesting input. I tried a number of different ffmpeg
>incantations cribbed from various internet postings (I'm not proficient
>enough in ffmpeg to come up with my own possibilities), but none have so
>far resulted in a file that is playable. Just to be clear, I actually
>download the finished podcast as an mp3 as opposed to recording it myself,
>as you were doing. As to lossiness, that's not much of a concern to me
>since this is a talk podcast.
I can remember trying all sorts of settings to try to get a playable
file. Then I decided to try and make a file that was similar to the
DVB-T broadcasts, and eventually got the above settings. In case the
format of the .jpg file matters, I have put a copy of my
audio_only.jpg file on my web server:
I made that file from a text file using IrFanView which is able to
convert ASCII text to a .jpg. It says "Audio Only Recording".
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