Error : this file format does not support pipe write.
Haz3lnut opened this issue · 3 comments
Per the Usage specs:
-W filename Write audio data to RF64/WAV S16_LE file
use filename '-' to write to stdout
However, I try to pipe to ffmpeg with the following:
airspy-fmradion -t airspyhf -q -c freq=105300000,srate=384000 -b 1.0 -W - | ffmpeg -f s16le -ar 48000 -ac 2 -i - -c:a libfdk_aac -b:a 192k -ar 48000 -af "volume=5dB" -y out.aac
It returns the following error:
airspy-fmradion 20211209-0
Software FM/AM radio for Airspy R2, Airspy HF+, and RTL-SDR
output buffer length: 1 [s]
writing RF64/WAV int16 audio samples to '-'
ERROR: AudioOutput: can not open '-' (Error : this file format does not support pipe write.)
Am I missing something?
Please use the -R option for RAW binary audio output to the pipe.
The WAV file output driver rewrites the file header periodically, so it does not work with a pipe.
Thank you for such a quick reply. Yes, -R option worked just fine for the pipe.
Suggest remove the stdout pipe option from -W to prevent further confusion.
Added the explanations to the help message and README explicitly stating pipe is not supported by the -W and -G options, made the new release 20220203-0, including the documentation fixes. Issue closed.