Error while opening encoder for output stream #0.0 - maybe incorrect parameters such as bit_rate, rate, width or height

Question

I am using this command to convert an avi,mov,m4v video files to flv format via FFMPEG

/usr/local/bin/ffmpeg -i \'/home/public_html/files/video_1355440448.m4v\'          


        

Answer 1

I have got the same issue

- requested bitrate is too low

and just resolved this issue by lowering down the bit rate

by adding -b:a 32k

Answer 2

I had a similar problem due to size constraints. The original image size was strange (width=1343), meaning that when I tried to specify a new size with -s, any rounding error caused problems. Make sure that the new image size can have the exact same aspect ratio!

Answer 3

You are given an error message

[flv @ 0x68b1a80] requested bitrate is too low

You need to change bitrate to a valid. It is better if you use a different codec

-acodec libmp3lame

And remove the option -sameq. This option does NOT mean 'same quality'. Actually means 'same quantizers'!

Answer 4

1. This is because you have two streams and output will be encoding then resizing, see your output messages:

   Stream #0.0 -> #0.0
   Stream #0.1 -> #0.1
   

   ... you use adpcm_swf audio and yuv420p video

   The answer is very simple, you need to put copy as your audio codec ...

   See my example with video mpeg4,yuv420p and audio ac3 ...

   ffmpeg -i input.mkv -vf scale=720:-1 -acodec copy -threads 12 output.mkv
   

   this will change first size = 720 with aspect ratio = -1 (unknown). Also you need to use:

   -acodec copy -threads 12
   

   If don't use this you will have one error. For example: When I used it, the output encoding messages show me this and it works well:

   [h624 @ 0x874e4a0] missing picture in access unit93 bitrate=1034.4kbits/s    
   Last message repeated 1163 times5974kB time=53.47 bitrate= 915.3kbits/s 
   

2. You need to use for flv format file, something like this:

   ffmpeg -i input.mp4 -c:v libx264 -crf 19 output.flv