ffmpeg - How to convert audio/music to video with static image (commandline) -

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i have audio file convert video. if possible, use static image appearing @ video. have investigated couple possible solutions, non of them functional.

this solution in previous thread 

ffmpeg -loop_input -shortest -y -i image8.jpg -i sound11.mp3 -acodec copy -vcodec mjpeg result.avi

does not work more, not extend video duration of audio file. additionally, ffmpeg complains deprecated , suggests use avconv instead.

avconv -i sound11.mp3 -strict experimental -i 341410.jpg -map 0:a  out.mp4

but image not appear

finally have tried gstreamer 

gst-launch filesrc location=deltio.mp3 ! mp3parse ! mp4mux name=mux filesink location=output.mp4  filesrc location=341410.jpg ! jpegdec ! x264enc ! mux.

but error 

error: element /gstpipeline:pipeline0/gstx264enc:x264enc0: can not initialize x264 encoder.  additional debug info: gstx264enc.c(1269): gst_x264_enc_init_encoder (): /gstpipeline:pipeline0/gstx264enc:x264enc0  error: pipeline doesn't want preroll.

since want include conversion python script, latter solution seems best, there python wrapper gstreamer

them old commands there. have a script purpose, this

ffmpeg -loop 1 -r 1 -i img.png -i song.m4a -qp 0 -filter:v 'crop=trunc(iw/2)*2' \   -c:a aac -strict -2 -b:a 384k video.mp4

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