FFmpeg Is Unable to See Audio Stream in Youtube's Latest Video Format

[marcus3v]

Consider the video below:

"Amazing! Bird sounds from the lyre bird - David Attenborough - BBC wildlife" -- ​http://www.youtube.com/watch?v=VjE0Kdfos4Y

Once downloaded, if FFmpeg is run upon it, the following is reported:

---

ffmpeg version N-55702-g920046a Copyright (c) 2000-2013 the FFmpeg developers

built on Aug 21 2013 18:01:31 with gcc 4.7.3 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av

isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
eex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-
amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --
enable-libxvid --enable-zlib

libavutil 52. 42.100 / 52. 42.100
libavcodec 55. 29.100 / 55. 29.100
libavformat 55. 14.101 / 55. 14.101
libavdevice 55. 3.100 / 55. 3.100
libavfilter 3. 82.100 / 3. 82.100
libswscale 2. 5.100 / 2. 5.100
libswresample 0. 17.103 / 0. 17.103
libpostproc 52. 3.100 / 52. 3.100

Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'youtubeAudioStrmMissing':

Metadata:

major_brand : dash
minor_version : 0
compatible_brands: iso6avc1mp41
creation_time : 2013-05-09 01:03:36

Duration: 00:02:54.08, start: 0.000000, bitrate: 269 kb/s

Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 320x240,

267 kb/s, 25 tbr, 90k tbn, 50 tbc

Metadata:

creation_time : 2013-05-09 01:03:36
handler_name : VideoHandler

At least one output file must be specified

---

So, it's not seeing the audio stream (...)

Thanks in advance, FFmpeg Team

[marcus3v]

I have the video file, but it's greater than 2,5MB ( 5,6MB )

[Carl Eugen Hoyos]

Please upload your file as explained on ​http://ffmpeg.org/bugreports.html (there is no hard size limit).

[marcus3v]

I tried to upload the file through the form at "​http://upload.ffmpeg.org/upload/upload.php".

The Server returned the following:

---

1
Warning: copy() [function.copy]: Filename cannot be empty in /Library/WebServer/Documents/upload/upload.php on line 48
Your upload has completed. You may close the window now.

---

Filenames "youtubeAudioStrmMissing" and "youtubeAudioStrmMissing.avc1" were tested.

[Carl Eugen Hoyos]

Replying to marcus3v:

I tried to upload the file through the form at "​http://upload.ffmpeg.org/upload/upload.php".

What's wrong with ftp?
As an alternative, you can use ​http://www.datafilehost.com/

[marcus3v]

File uploaded to Data File Host:

​http://www.datafilehost.com/d/cd6f0bca

[DonMoir]

I downloaded 3 flv, 1 mp4, 2 webm, and 2 3gp from the youtube site. They all played fine with audio and video.

The file you uploaded seems to only have video or that is the only stream reported by ffmpeg. Possibly whatever you used to download it is at fault. No player I tried played it with audio.

If none of the above how did you download that version you uploaded?

[Carl Eugen Hoyos]

The file you uploaded contains only one trak atom so there is no other stream beside the video stream.

[marcus3v]

Has someone downloaded the video in question directly from Youtube and tested it? If not, I would thank very much for such a kindness

[DonMoir]

I downloaded every video I could from youtube and then asked how or where you downloaded that version. You gave no response.

[marcus3v]

Excuse me, DonMoir. I misunderstood what you had said earlier.