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  • FFMPEG NVENC HEVC to H264

    18 octobre 2022, par Sambir

    I try to transcode a HEVC 4k broadcast down to 1080p H264. HEVC 4K to HEVC 1080p works but when I try hevc to h264 i get "No NVENC capable devices found"

    



    Now I am wondering is it not possible to fully hw transcode HEVC to H264 ?

    



    Code used :

    



    ffmpeg -timeout 10000000 -reconnect 1 -reconnect_at_eof 1 -reconnect_streamed 1 -reconnect_delay_max 2 -hwaccel_device 0 -hwaccel cuvid -vcodec hevc_cuvid -resize 1920x1080 -i 'http://inputstream' -max_muxing_queue_size 1024 -map 0:0 -map 0:2 -acodec libfdk_aac -b:a 96k -c:v h264_nvenc -gpu 0 -preset llhq -profile high -rc:v vbr -qmin:v 26 -qmax:v 32 -b:v 4M -maxrate 4M -bufsize 8M -threads 0 -r 25 -g 100 -f mpegts 'udp://127.0.0.1:6472' 


    



    When I run the code :

    



    [h264_nvenc @ 0x3bf42c0] Provided device doesn't support required NVENC features
Error initializing output stream 0:0 — Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
Conversion failed !

    



    Is it not possible to convert HEVC back to H264 ?

    



    log :

    



    root@sambir-T5600:~# ffmpeg -timeout 10000000 -reconnect 1 -reconnect_at_eof 1 -reconnect_streamed 1 -reconnect_delay_max 2 -hwaccel_device 0 -hwaccel cuvid -vcodec hevc_cuvid -resize 1920x1080 -i 'http://192.168.1.12:8001/1:0:19:3FAC:7851:ABC:1A40000:0:0:0:' -max_muxing_queue_size 1024 -map 0:0 -map 0:2 -acodec libfdk_aac -b:a 96k -c:v h264_nvenc -gpu 0 -preset llhq -vprofile high -rc:v vbr -qmin:v 26 -qmax:v 35 -b:v 4M -maxrate 4M -bufsize 8M -threads 0 -r 25 -g 100 -f mpegts 'udp://127.0.0.1:6472'
ffmpeg version N-95090-g646799b Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.4)
  configuration: --prefix=/root/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/root/ffmpeg_build/include --extra-ldflags=-L/root/ffmpeg_build/lib --bindir=/root/bin --enable-cuda-nvcc --enable-cuvid --enable-libnpp --extra-cflags=-I/usr/local/cuda/include/ --extra-ldflags=-L/usr/local/cuda/lib64/ --enable-gpl --enable-libass --enable-libfdk-aac --enable-libx264 --enable-libx265 --enable-pic --extra-libs='-lpthread -lm -lz -ldl' --enable-nvenc --enable-nonfree
  libavutil      56. 35.100 / 56. 35.100
  libavcodec     58. 59.100 / 58. 59.100
  libavformat    58. 33.100 / 58. 33.100
  libavdevice    58.  9.100 / 58.  9.100
  libavfilter     7. 59.100 /  7. 59.100
  libswscale      5.  6.100 /  5.  6.100
  libswresample   3.  6.100 /  3.  6.100
  libpostproc    55.  6.100 / 55.  6.100
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
[hevc @ 0x44d8000] PPS id out of range: 0
    Last message repeated 1 times
[hevc @ 0x44d8000] Error parsing NAL unit #2.
Input #0, mpegts, from 'http://192.168.1.12:8001/1:0:19:3FAC:7851:ABC:1A40000:0:0:0:':
  Duration: N/A, start: 21829.677256, bitrate: N/A
  Program 16300
    Stream #0:0[0x12f7]: Video: hevc (Main 10) ([36][0][0][0] / 0x0024), yuv420p10le(tv), 3840x2160 [SAR 1:1 DAR 16:9], 50 fps, 50 tbr, 90k tbn, 50 tbc
    Stream #0:1[0x135b]: Audio: eac3 ([6][0][0][0] / 0x0006), 48000 Hz, 5.1(side), fltp, 256 kb/s
    Stream #0:2[0x13bf]: Audio: aac (HE-AAC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 80 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (hevc (hevc_cuvid) -> h264 (h264_nvenc))
  Stream #0:2 -> #0:1 (aac (native) -> aac (libfdk_aac))
Press [q] to stop, [?] for help
[h264_nvenc @ 0x44df300] Provided device doesn't support required NVENC features
Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
Conversion failed!


    


  • ffmpeg hwmap SW decoded frame to OpenCL and hwmap back to h264 for SW encode

    3 novembre 2019, par Oleksandr Kyrpa

    I trying speed up process and avoid copy frames between GPU and CPU. But got error : "Segmentation fault : 11", so may be I’m doing something wrong ?

    My full ffmpeg command and log here :

    ./ffmpeg -i ../720.mp4 -init_hw_device opencl=ocl:0.1 -filter_hw_device ocl  -filter_complex "hwmap,avgblur_opencl=30,hwmap"  -c:v h264 -an -t 10 -y ../out_blur.mp4 -loglevel debug

    Output :

    ./ffmpeg -i ../720.mp4 -init_hw_device opencl=ocl:0.1 -filter_hw_device ocl  -filter_complex "hwmap,avgblur_opencl=30,hwmap"  -c:v h264 -an -t 10 -y ../out_blur.mp4 -loglevel debug
    
ffmpeg version N-95621-g53c21c2d6b Copyright (c) 2000-2019 the FFmpeg developers
    
  built with Apple LLVM version 10.0.0 (clang-1000.10.44.4)
    
  configuration: --enable-fontconfig --enable-gpl --enable-libaom --enable-libass --enable-libbluray --enable-libfreetype --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --disable-ffplay --enable-nonfree --enable-opencl
    
  libavutil      56. 35.101 / 56. 35.101
    
  libavcodec     58. 60.100 / 58. 60.100
    
  libavformat    58. 33.100 / 58. 33.100
    
  libavdevice    58.  9.100 / 58.  9.100
    
  libavfilter     7. 66.100 /  7. 66.100
    
  libswscale      5.  6.100 /  5.  6.100
    
  libswresample   3.  6.100 /  3.  6.100
    
  libpostproc    55.  6.100 / 55.  6.100
    
Splitting the commandline.
    
Reading option '-i' ... matched as input url with argument '../720.mp4'.
    
Reading option '-init_hw_device' ... matched as option 'init_hw_device' (initialise hardware device) with argument 'opencl=ocl:0.1'.
    
Reading option '-filter_hw_device' ... matched as option 'filter_hw_device' (set hardware device used when filtering) with argument 'ocl'.
    
Reading option '-filter_complex' ... matched as option 'filter_complex' (create a complex filtergraph) with argument 'hwmap,unsharp_opencl=lx=17:ly=17:la=5,hwmap'.
    
Reading option '-c:v' ... matched as option 'c' (codec name) with argument 'h264'.
    
Reading option '-an' ... matched as option 'an' (disable audio) with argument '1'.
    
Reading option '-t' ... matched as option 't' (record or transcode "duration" seconds of audio/video) with argument '10'.
    
Reading option '-y' ... matched as option 'y' (overwrite output files) with argument '1'.
    
Reading option '../out_blur.mp4' ... matched as output url.
    
Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'debug'.
    
Finished splitting the commandline.
    
Parsing a group of options: global .
    
Applying option init_hw_device (initialise hardware device) with argument opencl=ocl:0.1.
    
[AVHWDeviceContext @ 0x7fbb1ec08480] 1 OpenCL platforms found.
    
[AVHWDeviceContext @ 0x7fbb1ec08480] 3 OpenCL devices found on platform "Apple".
    
[AVHWDeviceContext @ 0x7fbb1ec08480] 0.1: Apple / HD Graphics 4000
    
Applying option filter_hw_device (set hardware device used when filtering) with argument ocl.
    
Applying option filter_complex (create a complex filtergraph) with argument hwmap,unsharp_opencl=lx=17:ly=17:la=5,hwmap.
    
Applying option y (overwrite output files) with argument 1.
    
Applying option loglevel (set logging level) with argument debug.
    
Successfully parsed a group of options.
    
Parsing a group of options: input url ../720.mp4.
    
Successfully parsed a group of options.
    
Opening an input file: ../720.mp4.
    
[NULL @ 0x7fbb1f818c00] Opening '../720.mp4' for reading
    
[file @ 0x7fbb1ec3d600] Setting default whitelist 'file,crypto'
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fbb1f818c00] Format mov,mp4,m4a,3gp,3g2,mj2 probed with size=2048 and score=100
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fbb1f818c00] ISO: File Type Major Brand: isom
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fbb1f818c00] Unknown dref type 0x206c7275 size 12
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fbb1f818c00] Processing st: 0, edit list 0 - media time: 0, duration: 300300
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fbb1f818c00] Before avformat_find_stream_info() pos: 4123312 bytes read:34929 seeks:1 nb_streams:1
    
[h264 @ 0x7fbb1f9ae800] nal_unit_type: 7(SPS), nal_ref_idc: 1
    
[h264 @ 0x7fbb1f9ae800] nal_unit_type: 8(PPS), nal_ref_idc: 1
    
[h264 @ 0x7fbb1f9ae800] nal_unit_type: 6(SEI), nal_ref_idc: 0
    
[h264 @ 0x7fbb1f9ae800] nal_unit_type: 5(IDR), nal_ref_idc: 1
    
[h264 @ 0x7fbb1f9ae800] Format yuv420p chosen by get_format().
    
[h264 @ 0x7fbb1f9ae800] Reinit context to 1280x720, pix_fmt: yuv420p
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fbb1f818c00] All info found
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fbb1f818c00] After avformat_find_stream_info() pos: 38244 bytes read:73125 seeks:2 frames:1
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '../720.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf58.33.100
    
  Duration: 00:00:10.01, start: 0.000000, bitrate: 3295 kb/s
    
    Stream #0:0(und), 1, 1/30000: Video: h264 (High), 1 reference frame (avc1 / 0x31637661), yuv420p(left), 1280x720 [SAR 1:1 DAR 16:9], 0/1, 3293 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 60k tbc (default)
    
    Metadata:
    
      handler_name    : ISO Media file produced by Google Inc. Created on: 10/24/2018.
    
Successfully opened the file.
    
[Parsed_unsharp_opencl_1 @ 0x7fbb1ec45640] Setting 'lx' to value '17'
    
[Parsed_unsharp_opencl_1 @ 0x7fbb1ec45640] Setting 'ly' to value '17'
    
[Parsed_unsharp_opencl_1 @ 0x7fbb1ec45640] Setting 'la' to value '5'
    
Parsing a group of options: output url ../out_blur.mp4.
    
Applying option c:v (codec name) with argument h264.
    
Applying option an (disable audio) with argument 1.
    
Applying option t (record or transcode "duration" seconds of audio/video) with argument 10.
    
Successfully parsed a group of options.
    
Opening an output file: ../out_blur.mp4.
    
Matched encoder 'libx264' for codec 'h264'.
    
[file @ 0x7fbb1ec44680] Setting default whitelist 'file,crypto'
    
Successfully opened the file.
    
detected 8 logical cores
    
[h264 @ 0x7fbb1f9a9800] nal_unit_type: 7(SPS), nal_ref_idc: 1
    
[h264 @ 0x7fbb1f9a9800] nal_unit_type: 8(PPS), nal_ref_idc: 1
    
Stream mapping:
    
  Stream #0:0 (h264) -> hwmap
    
  hwmap -> Stream #0:0 (libx264)
    
Press [q] to stop, [?] for help
    
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
    
    Last message repeated 1 times
    
[h264 @ 0x7fbb1f9a9800] nal_unit_type: 6(SEI), nal_ref_idc: 0
    
[h264 @ 0x7fbb1f9a9800] nal_unit_type: 5(IDR), nal_ref_idc: 1
    
[h264 @ 0x7fbb1f9a9800] Format yuv420p chosen by get_format().
    
[h264 @ 0x7fbb1f9a9800] Reinit context to 1280x720, pix_fmt: yuv420p
    
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
    
[h264 @ 0x7fbb1f9b7e00] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
    
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
    
[h264 @ 0x7fbb1f9cf200] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
    
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
    
[h264 @ 0x7fbb1fa04c00] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
    
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
    
[h264 @ 0x7fbb1fa1b000] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
    
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
    
[h264 @ 0x7fbb1fa24800] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
    
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
    
[h264 @ 0x7fbb1fa24e00] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
    
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
    
[h264 @ 0x7fbb1fa25400] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
    
[h264 @ 0x7fbb22809200] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
    
[Parsed_unsharp_opencl_1 @ 0x7fbb1ed04e80] Setting 'lx' to value '17'
    
[Parsed_unsharp_opencl_1 @ 0x7fbb1ed04e80] Setting 'ly' to value '17'
    
[Parsed_unsharp_opencl_1 @ 0x7fbb1ed04e80] Setting 'la' to value '5'
    
[graph 0 input from stream 0:0 @ 0x7fbb1ee09040] Setting 'video_size' to value '1280x720'
    
[graph 0 input from stream 0:0 @ 0x7fbb1ee09040] Setting 'pix_fmt' to value '0'
    
[graph 0 input from stream 0:0 @ 0x7fbb1ee09040] Setting 'time_base' to value '1/30000'
    
[graph 0 input from stream 0:0 @ 0x7fbb1ee09040] Setting 'pixel_aspect' to value '1/1'
    
[graph 0 input from stream 0:0 @ 0x7fbb1ee09040] Setting 'sws_param' to value 'flags=2'
    
[graph 0 input from stream 0:0 @ 0x7fbb1ee09040] Setting 'frame_rate' to value '30000/1001'
    
[graph 0 input from stream 0:0 @ 0x7fbb1ee09040] w:1280 h:720 pixfmt:yuv420p tb:1/30000 fr:30000/1001 sar:1/1 sws_param:flags=2
    
[format @ 0x7fbb1ed0a080] Setting 'pix_fmts' to value 'yuv420p|yuvj420p|yuv422p|yuvj422p|yuv444p|yuvj444p|nv12|nv16|nv21|yuv420p10le|yuv422p10le|yuv444p10le|nv20le'
    
[AVFilterGraph @ 0x7fbb21004240] query_formats: 7 queried, 6 merged, 0 already done, 0 delayed
    
[Parsed_hwmap_2 @ 0x7fbb1ed03e00] picking yuv420p out of 13 ref:opencl alpha:1
    
[Parsed_hwmap_0 @ 0x7fbb1ed09940] Configure hwmap yuv420p -> opencl.
    
[Parsed_hwmap_2 @ 0x7fbb1ed03e00] Configure hwmap opencl -> yuv420p.
    
[hwmap @ 0x7fbb1ed03940] Filter input: yuv420p, 1280x720 (0).
    
Segmentation fault: 11

  • Does ffmpeg support 7.x channels encoding in Dolby Digital format (.ac3) ?

    4 novembre 2019, par CC2023

    Using ffmpeg, I was able to encode 5.x channels from .wav to .ac3. But 7.x channels did not work. The encoded .ac3 missed channel 6th and 7th.

    Does ffmpeg support 7.x channel encoding for .ac3 ?

    My ffmpeg version git-2019-10-28-68f623d. Thanks.

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