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• FFmpeg : H.265/HEVC - does not work on Sony Smart-TV if you change encoder

  25 juillet 2019, par oigen90

  We have such Sony Bravia Smart-TV devices :

  • Sony KD-49XD7005 (2016) - Android
  • Sony KD-49XE7096 (2017) - Linux

  Those devices does have HEVC support, as well as 4K support.

  Also, we have a one minute Apple ProRes 4K video file. I need to transcode it into HEVC with some simple params, create DASH manifest and stream it into HTML5-player.
  The problem is that if I use the regular ’libx265’ codec passing it after "-c:v" - the video does not play on Sony Bravia (just freezes on ’loadstart’ player’s event). But if I use ’hevc_nvenc’ - it works ! What’s the reason of such behavior ? Both of codecs should work identically, hevc_nvenc just should be faster and was made to work on nvidia graphic cards (that’s all I know about those codecs’ difference so far). But in fact we have working stream encoded into hevc_nvenc and invalid stream encoded into libx265.

  See my FFmpeg command below.

  Which thoughts do you have ? If you want me to provide some more info - feel free to ask.

  ffmpeg -i input.mov -c:v hevc_nvenc -pix_fmt yuv420p -b:v 12000k -maxrate 14000k -bufsize 6000k -c:a copy -f mp4 output.mp4

• Cut detection with ffprobe

  8 juillet 2019, par Roman Volodin

  I’m trying to detect cuts between shots with ffprobe. I use the following command :

  ffprobe -show_frames -of compact=p=0 -f lavfi "movie=test_clip.avi,select=gt(scene\,.4)" > test_clip_cuts.txt

  It works just fine, there’s no question. But now I want to detect the cuts in certain range only. Let’s say from 3 to 8 seconds. How I could do that ?

  I tried to use -read_intervals 3%8 but it gave me an error :

  Could not seek to position 3000000: Invalid argument
  
  Could not read packets in interval id:0 start:3 end:8

  Command -read_intervals %+3 (read from the very begining to 3rd second) works, but in weird way - it detects cuts up to 4th second (and over, I guess).

  So I’m confused. What are those "intervals" and how to use them ? Is it possible to set the range in regular seconds ?

  Just in case here is my test clip https://yadi.sk/i/nd-c12mYeQ2nb

• GLtransition not working properly with 480p

  13 juin 2019, par Yukesh Aravind

  I have a problem with GL Transition while rendering video at 480p, GL EFFECT applies but not as it was but it works fine for 1080P and 720P, here is my command :

  ffmpeg -y -loop 1 -t 5 -i /srv/sample/text_images/textimage_bRq4E_1560330312.png -loop 1 -t 8 -i /srv/sample/text_images/textimage_mZPFr_1560330318.png -loop 1 -t 16 -i 'https://pixabay.com/get/52e3d14a4b5ab114a6df8c7ece2a3e7f083edbe35352704f742779.jpg' -loop 1 -t 18 -i 'https://pixabay.com/get/55e6d7424f52b114a6df8c7ece2a3e7f083edbe35352704f742779.jpg' -t 8 -i '/srv/sample/img/image.png' -filter_complex "[2:v]scale=w=2556:h=1440,zoompan=z='zoom+0.001':x='if(gte(zoom,1.5),x,x-1)':y='y':s=852x480:d=180,setsar=1,drawbox=color=black@0:width=iw:height=ih:t=fill[v2];[v2][0:v]overlay=x=(main_w-overlay_w)/2:y=(main_h-overlay_h)/2[v2];[4:v]fps=25,scale=25:25,setsar=1:1[v4];[v2][v4]overlay=x=10:y=(main_h-overlay_h)-10[v2];[3:v]scale=w=2556:h=1440,zoompan=z='zoom+0.001':x='if(gte(zoom,1.5),x,x-1)':y='y':s=852x480:d=240,setsar=1,drawsamplev/sample/fonts/Catamaran/Catamaran-Regular.ttf:text=pixabay.com:fontcolor=white:fontsize=20:x=60:y=(h-text_h)-10,drawbox=color=black@0:width=iw:height=ih:t=fill[v3];[v3][1:v]overlay=x=(main_w-overlay_w)/2:y=(main_h-overlay_h)/2[v3];[4:v]fps=25,scale=25:25,setsar=1:1[v4];[v3][v4]overlay=x=10:y=(main_h-overlay_h)-10[v3];[v2]split[s12][s22];[s12]trim=0:5:start=0:duration=5[s12];[s12]setpts=PTS-STARTPTS[s12];[s22]trim=5:6[s22];[s22]setpts=PTS-STARTPTS[s22];[v3]split[s13][s23];[s13]trim=0:7:start=0:duration=7[s13];[s13]setpts=PTS-STARTPTS[s13];[s23]trim=7:8[s23];[s23]setpts=PTS-STARTPTS[s23];[s22][s13]gltransition=duration=1:source=/filters/CircleCrop.glsl[vt0];[s12][vt0][s23]concat=n=3:v=1:a=0[tmp]" -map '[tmp]' -pix_fmt yuvj444p /srv/sample/rendered/video_h5DjO_1560330312.mp4

  what makes to fail, please let me to understand.

  I also attach the image, please give me some suggestions