Recherche avancée

Sur d’autres sites (11573)

• Anomalie #4430 : image_reduire gère mal les arrondis

  4 février 2020, par jluc -

  L’image initiale fait 640 × 427 pixels.
  |image_proportions1,1,focus produit correctement une image de 427x427. Il est donc probable qu’on reproduit le pb directement à partir d’une image de 427x427

  En tout cas le résultat final fait réellement 200x201.

• Optimize ffmpeg overlay and loop filters

  5 novembre 2020, par Miro Barsocchi

  I have a video, video.mp4, of 30 seconds, and I have an audio that can change in length, audio.mp3.

  


  My final idea is to have an output video of a loop of video.mp4 for the total length of the audio.mp3, and an overlay of the waveform of the audio.mp3. What I've done is this, in a bash script :

  


  # calculate length of the audio and of the video
tot=$(ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 audio.mp3)
vid=$(ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 video.mp4)
# how many base video we need to loop into the waveform video?
repeattime=`echo "scale=0; ($tot+$vid-1)/$vid" | bc`

# ffmpeg final command
ffmpeg -stream_loop $repeattime -i video.mp4 -i audio.mp3 -filter_complex "[1:a]showwaves=s=1280x100:colors=Red:mode=cline:rate=25:scale=sqrt[outputwave]; [0:v][outputwave] overlay=0:main_h-overlay_h [out]" -map '[out]' -map '1:a' -c:a copy -y output.mp4


  


  Is there a better way to do it in a single ffmpeg command ? I know it exists the loop filter in ffmpeg, but it loops frames and I don't know the number of frames of the video.mp4. Also, using $repeattime can result in a number of loop longer then needed (because math calculation is done round up)

  


• ffmpeg kit flutter IOS No such filter : 'drawtext' Error

  6 août 2023, par Patel Milan

  I am using ffmpeg_kit_flutter and apply drawtext filter on video but i am getting errors No such filter: 'drawtext'

  


  input video link is input.mp4

  


  This command it working

  


  ffmpeg -y -i input.mp4 -filter_complex '[0]scale=540:-1[s];[s]drawtext=text='your_text_here':fontsize=24:fontcolor=white:x=(w-text_w)/2:y=(h-text_h)/2' output.mp4


  


  code sample is bellow

  


  /// Create Video With Text&#xA;Future<void> createVideoWithText() async {&#xA;  final file = File(&#x27;${(await getTemporaryDirectory()).path}/output.mp4&#x27;);&#xA;  String outPut = file.path;&#xA;&#xA;  String command = "-y -i $inputFilePath -filter_complex &#x27;[0]scale=540:-1[s];[s]drawtext=text=&#x27;MY_TEXT&#x27;:fontsize=24:fontcolor=white:x=(w-text_w)/2:y=(h-text_h)/2&#x27; $outPut";&#xA;&#xA;  FFmpegKit.executeAsync(&#xA;    command,&#xA;    (session) async {&#xA;      final returnCode = await session.getReturnCode();&#xA;&#xA;      if (ReturnCode.isSuccess(returnCode)) {&#xA;print(&#x27;Success full add text on video&#x27;);&#xA;      }else{print(&#x27;Error to adding text on video&#x27;);}&#xA;    },&#xA;  );&#xA;}&#xA;</void>