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• Output filename extension in fswatch and ffmpeg

  30 juin 2020, par rr09

  I'm having issue with the file-naming extension output. My input is JPG files that needs to convert to MP4 using FFMPEG. However, when I run the code below it output as img1.jpg.mp4 including the input file extension instead of just img1.mp4.

  


  fswatch -e ".*" -i "\\.jpg$" . |xargs -n1 basename|xargs -n1 -t -I {} sh -c 'pwd;[[ -f {} ]] && ffmpeg -y -loop 1 -i "{}" -vf "fade=t=in:st=0:d=1,fade=t=out:st=2:d=1" -preset "ultrafast" -c:v libx264 -t 3 -pix_fmt yuv420p "{}.mp4"'


  


  Any help is much appreciated.

  


  Running on MAC, SH/BASH

  


  EDITED :

  


  BTW I also tried a loop to do the trick like the code below, but I'm looking to more neat solution to fix it in the same line of code above or call function after FSWATCH successful operation.

  


   for file in
     *.jpg.mp4; do
        mv "$file" "$(basename "$file" .jpg.mp4).mp4"
    done


  


• ffmpeg ios : Getting frame to UIImage, failing at YUV420 to RGB conversion

  17 octobre 2015, par awfulcode

  I’m trying to extract a thumbnail from a movie file using ffmpeg. I found iFrameExtractor and tried using its code as the base for what I’m doing. There seems to be an option at compiling FFMPEG that I’m missing, because this part of the code is generating...

  img_convert_ctx = sws_getContext(pCodecCtx->width, 
  
                                       pCodecCtx->height,
  
                                       pCodecCtx->pix_fmt,
  
                                       outputWidth, 
  
                                       outputHeight,
  
                                       PIX_FMT_RGB24,
  
                                       sws_flags, NULL, NULL, NULL);

  This error :

  [swscaler @ 0x7ffb6a06d600] No accelerated colorspace conversion found from yuv420p to rgb24.

  If you look at libswscale/yuv2rgb.c, on line 612, it says that operation is only supported on PPC and x86.

  I’m at a loss now. Is there an option when compiling it that includes support for this ? Is there any way to convert it some other way ?

  Thank you so much.

• ffmpeg -stream_loop doesnt work on hls file

  7 décembre 2022, par Enrique Corpus

  Can someone pls help me figure out my problem with ffmpeg. When I try to add -stream_loop option on the command, I got an error

  


  [AVIOContext @ 0x7f8c42705080] Statistics: 362088 bytes read, 0 seeks296.7kbits/s speed=1.01x Seek to start failed. playlist_main2.m3u8: Operation not permitted

  


  And here is my ffmpeg command
ffmpeg -stream_loop -1 -i playlist_main2.m3u8 -bsf:a aac_adtstoasc -vcodec copy -c copy -crf 50 file.mp4

  


  Im thinking the problem might be on the .ts file, since I dont encounter this error when testing differet hls files, but I want to have a proof that the source is the proble. Pls help me. Attached is the m3u8 file and the .ts file.
HLS FILE

  


  Tried different hls file and the command works. Now im suspecting the problem is on the video (.ts) file itself but i cant prove it.