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• ffmpeg is not able to parse DASH-IF manifest

  9 décembre 2020, par Abhi Bhalgami

  I tried manifest from local tv channel provider. It's live stream but somehow ffmpeg is not able to parse the manifest.

  


  Command :

  


  ffmpeg -i "https://delta9tatasky.akamaized.net/out/i/2057298.mpd" -c copy -f mp4 /tmp/out.mp4


  


  It's encrypted with widevine DRM. But that's not important. ffmpeg is complaining about input data.

  


  Error :

  


  [dash @ 0x55d605e25100] Unable to read to manifest 'https://delta9tatasky.akamaized.net/out/i/2057298.mpd'
https://delta9tatasky.akamaized.net/out/i/2057298.mpd: Invalid data found when processing input


  


• avcodec/hevc_sei : replace en dash character with a hyphen

  6 décembre 2020, par James Almer

  avcodec/hevc_sei : replace en dash character with a hyphen
  Signed-off-by : James Almer <jamrial@gmail.com>
  

  • [DH] libavcodec/hevc_sei.c

• MP4 to DASH using ffmpeg linux too slow

  16 mai 2022, par darox

  Currently, I'm working at a project that contains 2000 video mp4 files, and I need convert all of them in mpeg dash files.

  



  I have this script :

  



  MYDIR=$(dirname $(readlink -f ${BASH_SOURCE[0]}))
SAVEDIR=$(pwd)

# Check programs
if [ -z "$(which ffmpeg)" ]; then
    echo "Error: ffmpeg is not installed"
    exit 1
fi

if [ -z "$(which MP4Box)" ]; then
    echo "Error: MP4Box is not installed"
    exit 1
fi

cd "$MYDIR"

TARGET_FILES=$(find ./ -maxdepth 1 -type f \( -name "*.mov" -or -name "*.mp4" \))
for f in $TARGET_FILES
do
  fe=$(basename "$f") # fullname of the file
  f="${fe%.*}" # name without extension

  if [ ! -d "${f}" ]; then #if directory does not exist, convert
    echo "Converting \"$f\" to multi-bitrate video in MPEG-DASH"

    mkdir "${f}"

    ffmpeg -y -i "${fe}" -c:a aac -b:a 192k -vn "${f}_audio.m4a"


    ffmpeg -y -i "${fe}" -preset slow -tune film -vsync passthrough -write_tmcd 0 -an -c:v libx264 -x264opts 'keyint=25:min-keyint=25:no-scenecut' -crf 23 -maxrate 800k -bufsize 2000k -pix_fmt yuv420p -vf "scale=-2:720" -f mp4  "${f}_800.mp4"
    # static file for ios and old browsers and mobile safari
    ffmpeg -y -i "${fe}" -preset slow -tune film -movflags +faststart -vsync passthrough -write_tmcd 0 -c:a aac -b:a 160k -c:v libx264  -crf 23 -maxrate 1400 -bufsize 3000k -pix_fmt yuv420p -f mp4 "${f}/${f}.mp4"


    rm -f ffmpeg*log*
    # if audio stream does not exist, ignore it
    if [ -e "${f}_audio.m4a" ]; then
        MP4Box -dash-strict 2000 -rap -frag-rap  -bs-switching no -profile "dashavc264:live" "${f}_5000.mp4" "${f}_3000.mp4" "${f}_1500.mp4" "${f}_800.mp4" "${f}_400.mp4" "${f}_audio.m4a" -out "${f}/${f}.mpd"
        rm "${f}_5000.mp4" "${f}_3000.mp4" "${f}_1500.mp4" "${f}_800.mp4" "${f}_400.mp4" "${f}_audio.m4a"
    else
        MP4Box -dash-strict 2000 -rap -frag-rap  -bs-switching no -profile "dashavc264:live" "${f}_5000.mp4" "${f}_3000.mp4" "${f}_1500.mp4" "${f}_800.mp4" "${f}_400.mp4" -out "${f}/${f}.mpd"
        rm "${f}_5000.mp4" "${f}_3000.mp4" "${f}_1500.mp4" "${f}_800.mp4" "${f}_400.mp4" 
    fi
    # create a jpg for poster. Use imagemagick or just save the frame directly from ffmpeg is you don't have cjpeg installed.
    ffmpeg -i "${fe}" -ss 00:00:00 -vframes 1  -qscale:v 10 -n -f image2 - | cjpeg -progressive -quality 75 -outfile "${f}"/"${f}".jpg

    fi

done

cd "$SAVEDIR"


  



  This is working fine, but, taking a long time to convert only single file, I have intel 7 and a simple mp4 file take 30 min to be converted. How can I accelerate this process ? Must I change something in this script ?

  



  Thank you.