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• Révision 17935 : classe liste sur le conteneur de la liste

  23 mai 2011, par cedric -

• Add logo on concatenated video

  5 septembre 2020, par ottpeter

  I'm trying to add a logo on top of a concatenated video. The video concatenation and the adding of the logo should be in the same filter complex. My filter complex currently looks like this (it is generated by Bash) :

  


  [0:v]scale=854:480:force_original_aspect_ratio=1,pad=width=854:height=480:x='if(lt(in_w,854),(854-in_w)/2,0)':0,setsar=1[v0];[1:v]scale=854:480:force_original_aspect_ratio=1,pad=width=854:height=480:x='if(lt(in_w,854),(854-in_w)/2,0)':0,setsar=1[v1];[2:v]scale=854:480:force_original_aspect_ratio=1,pad=width=854:height=480:x='if(lt(in_w,854),(854-in_w)/2,0)':0,setsar=1[v2];[3:v]scale=854:480:force_original_aspect_ratio=1,pad=width=854:height=480:x='if(lt(in_w,854),(854-in_w)/2,0)':0,setsar=1[v3];[4:v]scale=854:480:force_original_aspect_ratio=1,pad=width=854:height=480:x='if(lt(in_w,854),(854-in_w)/2,0)':0,setsar=1[v4];[5:v]scale=854:480:force_original_aspect_ratio=1,pad=width=854:height=480:x='if(lt(in_w,854),(854-in_w)/2,0)':0,setsar=1[v5];[6:v]scale=854:480:force_original_aspect_ratio=1,pad=width=854:height=480:x='if(lt(in_w,854),(854-in_w)/2,0)':0,setsar=1[v6];[7:v]scale=854:480:force_original_aspect_ratio=1,pad=width=854:height=480:x='if(lt(in_w,854),(854-in_w)/2,0)':0,setsar=1[v7];[8:v]scale=854:480:force_original_aspect_ratio=1,pad=width=854:height=480:x='if(lt(in_w,854),(854-in_w)/2,0)':0,setsar=1[v8];[9:v]scale=854:480:force_original_aspect_ratio=1,pad=width=854:height=480:x='if(lt(in_w,854),(854-in_w)/2,0)':0,setsar=1[v9];[10:v]scale=854:480:force_original_aspect_ratio=1,pad=width=854:height=480:x='if(lt(in_w,854),(854-in_w)/2,0)':0,setsar=1[v10];[11:v]scale=854:480:force_original_aspect_ratio=1,pad=width=854:height=480:x='if(lt(in_w,854),(854-in_w)/2,0)':0,setsar=1[v11];[12:v]scale=854:480:force_original_aspect_ratio=1,pad=width=854:height=480:x='if(lt(in_w,854),(854-in_w)/2,0)':0,setsar=1[v12];[13:v]scale=854:480:force_original_aspect_ratio=1,pad=width=854:height=480:x='if(lt(in_w,854),(854-in_w)/2,0)':0,setsar=1[v13];[14:v]scale=854:480:force_original_aspect_ratio=1,pad=width=854:height=480:x='if(lt(in_w,854),(854-in_w)/2,0)':0,setsar=1[v14];[15:v]scale=854:480:force_original_aspect_ratio=1,pad=width=854:height=480:x='if(lt(in_w,854),(854-in_w)/2,0)':0,setsar=1[v15];[16:v]scale=854:480:force_original_aspect_ratio=1,pad=width=854:height=480:x='if(lt(in_w,854),(854-in_w)/2,0)':0,setsar=1[v16];[17:v]scale=854:480:force_original_aspect_ratio=1,pad=width=854:height=480:x='if(lt(in_w,854),(854-in_w)/2,0)':0,setsar=1[v17];[18:v]scale=854:480:force_original_aspect_ratio=1,pad=width=854:height=480:x='if(lt(in_w,854),(854-in_w)/2,0)':0,setsar=1[v18];[19:v]scale=854:480:force_original_aspect_ratio=1,pad=width=854:height=480:x='if(lt(in_w,854),(854-in_w)/2,0)':0,setsar=1[v19];[20:v]scale=854:480:force_original_aspect_ratio=1,pad=width=854:height=480:x='if(lt(in_w,854),(854-in_w)/2,0)':0,setsar=1[v20];[21:v]scale=854:480:force_original_aspect_ratio=1,pad=width=854:height=480:x='if(lt(in_w,854),(854-in_w)/2,0)':0,setsar=1[v21];movie=/home/logo.png, scale=180:-1 [logo];
[v0][v1][v2][v3][v4][v5][v6][v7][v8][v9][v10][v11][v12][v13][v14][v15][v16][v17][v18][v19][v20][v21] concat=unsafe=1:n=22:v=1:a=0[conc]; [conc][logo] overlay=50:50 [outv];


  


  On 0bin, it is easier to read. So, there is a really long video concatenation part, and on the end, I would try to add the logo like this :

  


  


  [conc][logo] overlay=50:50 [outv] ;

  


  


  This is the error I'm getting :

  


  [AVFilterGraph @ 0x5640862fc520] No such filter: '' 
Error initializing complex filters.
Invalid argument


  


  How to do this correctly ?

  


  EDIT :
This is the Bash script :

  


      echo "Creating the video list..."
    # Number of videos
    VID_NUMBER=$(find $VIDS_PATH -maxdepth 1 -type f -printf . | wc -c)
    # File names can not contain spaces. INPUT_LIST will contain the list of input files, all files in VIDS folder.
    INPUT_LIST=""
    for file in $VIDS_PATH*
    do
        if [ ${file: -4} == ".jpg" ]
        then
            INPUT_LIST="${INPUT_LIST} -loop 1 -t $IMAGE_DURATION -i $file"
        else
            INPUT_LIST="${INPUT_LIST} -i $file"
        fi
    done

    echo "Creating filter complex..."
    # This is the beginning of the filter that is used for concatenation. Has to be an entry for all videos.
    FILTER_COMPLEX_LIST=""
    for ((i=0; i<$VID_NUMBER; i++))
    do
        FILTER_COMPLEX_LIST="${FILTER_COMPLEX_LIST}[$i:v]scale=$RES_X:$RES_Y:force_original_aspect_ratio=1,pad=width=$RES_X:height=$RES_Y:x='if(lt(in_w,$RES_X),($RES_X-in_w)/2,0)':0,setsar=1[v$i];"
    done

    # Insert logo
    FILTER_COMPLEX_LIST="${FILTER_COMPLEX_LIST}movie=$LOGO, scale=180:-1, setpts=PTS-STARTPTS [logo];"

    # Filter final line. This is also generated in a loop. Tells ffmpeg which videos to concat and specifies output [outv]. No sound.
    FILTER_FINAL_LINE=""
    for ((i=0; i<$VID_NUMBER; i++))
    do
        FILTER_FINAL_LINE="${FILTER_FINAL_LINE}[v$i]"
    done
    FILTER_FINAL_LINE="${FILTER_FINAL_LINE} concat=unsafe=1:n=22:v=1:a=0[conc]; [conc][logo] overlay=50:50 [outv];"

    # Run ffmpeg
    date +"%Y %b %d %H:%M:%S Starting ffmpeg to stream videos ..." >> /home/streamer.log
    ffmpeg \
        -y \
        -fflags +genpts \
        $INPUT_LIST \
        -filter_complex "\
        $FILTER_COMPLEX_LIST \
        $FILTER_FINAL_LINE" \
        -map "[outv]" \
        $OUTPUT_SETTINGS \
        $OUTPUT

        sleep 1
done


  


• Evolution #2487 : Pas d’alternative textuelle sur le logo d’un article ou d’une rubrique

  12 janvier 2012, par Maïeul Rouquette

  Un logo normalement est purement décoratif, donc l’alternative textuelle standard de SPIP est vide. Après tu peux éventuellement forcer au niveau du squelette l’alternative textuelle avec |inserer_attributalt,’’, mais il ne me semble pas pertinent que cela soit en standard dans (...)