[FFmpeg-user] Hidden audio in H264 - wrapped_avframe

[Hans Schuell (GiraOne)]

I am struggling with the camera output of a HQCAM camera from AliExpress,
when the video is written to the SD card.

 

The output video files on the SD card contain video (H264) and audio (G726).
With the Windows based CONVERTER.EXE provided by HQCAM, I can convert them
to AVI with video and audio present. The problem is: the CONVERTER.EXE is a
UI based tool, where I have to select each single file, but I have to
automate it. I would like to use ffmpeg for this. When I use 

 

ffmpeg -hide_banner -i file.h264 -t 0 -f null -

 

I get:

 

Input #0, h264, from 'file.264':

  Duration: N/A, bitrate: N/A

  Stream #0:0: Video: h264 (High), yuvj420p(pc, bt709, progressive),
1920x1080, 25 fps, 1200k tbr, 1200k tbn

Stream mapping:

  Stream #0:0 -> #0:0 (h264 (native) -> wrapped_avframe (native))

Press [q] to stop, [?] for help

Output #0, null, to 'pipe:':

  Metadata:

    encoder         : Lavf61.9.108

  Stream #0:0: Video: wrapped_avframe, yuvj420p(pc, bt709, progressive),
1920x1080, q=2-31, 200 kb/s, 25 fps, 25 tbn

    Metadata:

      encoder         : Lavc61.33.102 wrapped_avframe

[h264 @ 00000260240298c0] Invalid NAL unit 0, skipping.

[h264 @ 00000260240298c0] no frame!

[out#0/null @ 000002602402df00] video:0KiB audio:0KiB subtitle:0KiB other
streams:0KiB global headers:0KiB muxing overhead: unknown

[out#0/null @ 000002602402df00] Output file is empty, nothing was
encoded(check -ss / -t / -frames parameters if used)

frame=    0 fps=0.0 q=0.0 Lsize=N/A time=N/A bitrate=N/A speed=N/A

 

 

For me this output is difficult read. Using the ffmpeg command, that works
using the RTSP port of the camera:

 

ffmpeg -i file.h264 -hide_banner -loglevel warning -err_detect ignore_err
-dn -sn -map 0:0 -codec:v copy -map 0:1 -filter:a
aresample=osr=8000:ochl=mono -codec:a aac -b:a 64k -shortest file.mp4

 

it doesn't work. It leads to

 

Stream map '' matches no streams.

To ignore this, add a trailing '?' to the map.

Failed to set value '0:1' for option 'map': Invalid argument

 

Unfortunately, I found no information what "wrapped_avframe" means and how I
can convert such content to MP4/H264/AAC with ffmpeg.

 

Can anybody help on this?