# FFmpeg to Wowza mp3 does not work

**URL:** <https://community.wowza.com/t/ffmpeg-to-wowza-mp3-does-not-work/41744>\
**Category:** Wowza Streaming Engine\
**Created:** [December 23, 2013, 8:54am UTC](https://community.wowza.com/t/ffmpeg-to-wowza-mp3-does-not-work/41744 "2013-12-23T08:54:44Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![Brian\_Simonson](https://avatars.discourse-cdn.com/v4/letter/b/13edae/32.png) [@Brian\_Simonson](https://community.wowza.com/u/Brian_Simonson)\
**Post date:** [December 23, 2013, 8:54am UTC](https://community.wowza.com/t/ffmpeg-to-wowza-mp3-does-not-work/41744/1 "2013-12-23T08:54:44Z")

</div>

I am taking in a live audio source, converting it to mp3 with ffmpeg, and pushing that stream to Wowza. I have followed all the examples with live streaming and used the recommended Application.xml configurations. However, I cannot play the stream from Wowza.

If I stream a video source such as the following:

```auto
ffmpeg -y -f video4linux2 -async 1 -i /dev/video0 -f alsa -ac 2 -ar 44100 -b:a 64k -i hw:0,0 -c:a aac -strict -2 -b:v 800k -g 15 -s 1280x720 -c:v libx264 -f flv rtmp://myip:1935/live/mp4:test

```

it works just fine.

But if I take out everything but the audio and switch to mp3 like so:

```auto
ffmpeg -y -f alsa -ac 2 -ar 44100 -b:a 64k -i hw:0,0 -c:a mp3 -strict -2 -f mp3 rtmp://myip:1935/live/mp3:test

```

I receive a “dead stream” or “no source” when trying to play it.

Any ideas?

---

<div class="post-metadata">

**Author:** ![Richard\_Lanham](https://avatars.discourse-cdn.com/v4/letter/r/c68b51/32.png) [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)\
**Post date:** [December 23, 2013, 5:20pm UTC](https://community.wowza.com/t/ffmpeg-to-wowza-mp3-does-not-work/41744/2 "2013-12-23T17:20:55Z")

</div>

Try it like this:

```auto
ffmpeg -re -i [source stream or file] -vn -acodec libmp3lame -ab 64000 -ar 44100 -ac 2 -strict experimental -f flv rtmp://localhost/live/ffmpeg

```

Or using [FFmpeg](https://www.wowza.com/docs/how-to-use-ffmpeg-with-wowza-media-server-mpeg-ts%28MPEG-TS%29) as [mpeg-ts encoder](https://www.wowza.com/docs/how-to-publish-and-play-a-live-stream-mpeg-ts-based-encoder%28MPEG-TS-based-encoder%29)

```auto
ffmpeg -re -i [source stream or file] -vn -acodec libmp3lame -ab 64000 -ar 44100 -ac 2 -strict experimental -f mpegts udp://127.0.0.1:10000?pkt_size=1316

```

The -vn flag excludes video.

Richard

---

<div class="post-metadata">

**Author:** ![Richard\_Lanham](https://avatars.discourse-cdn.com/v4/letter/r/c68b51/32.png) [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)\
**Post date:** [December 24, 2013, 7:38pm UTC](https://community.wowza.com/t/ffmpeg-to-wowza-mp3-does-not-work/41744/3 "2013-12-24T19:38:01Z")

</div>

Not sure what that issue is, perhaps the source. For reference these VLC command lines generate AAC and MP3 streams.

```auto
AAC:
vlc -vvv "%WMSAPP_HOME%/content/sample.mp4" --no-sout-video --sout "#transcode{acodec=mp4a,ab=96,channels=2,samplerate=48000}:rtp{dst=127.0.0.1,port=10000,mux=ts}"
MP3:
vlc -vvv "%WMSAPP_HOME%/content/sample.mp4" --no-sout-video --sout "#transcode{acodec=mp3,ab=64,channels=2,samplerate=44100}:rtp{dst=127.0.0.1,port=10000,mux=ts}"

```

You can re-stream using same mpeg-ts guide, and refer to [this VLC guide](https://www.wowza.com/docs/how-to-use-vlc-as-a-live-stream-encoder-with-wowza-media-server-mpeg-ts%28MPEG-TS%29).

Richard

---

<div class="post-metadata">

**Author:** ![Brian\_Simonson](https://avatars.discourse-cdn.com/v4/letter/b/13edae/32.png) [@Brian\_Simonson](https://community.wowza.com/u/Brian_Simonson)\
**Post date:** [December 23, 2013, 12:38pm UTC](https://community.wowza.com/t/ffmpeg-to-wowza-mp3-does-not-work/41744/4 "2013-12-23T12:38:40Z")

</div>

> Try it like this:
> 
> ```auto
> ffmpeg -re -i [source stream or file] -vn -acodec libmp3lame -ab 64000 -ar 44100 -ac 2 -strict experimental -f flv rtmp://localhost/live/ffmpeg
> 
> ```
> 
> The -vn flag excludes video.
> 
> Richard

Using this example the stream connects but using vlc and

```auto
rtmp://myip:1935/live/mp3:ffmpeg

```

and

```auto
rtmp://myip:1935/live/ffmpeg

```

I now get “VLC does not support the audio or video format “undf”. Unfortunately there is no way for you to fix this…”