[FFmpeg-trac] #7357(ffmpeg:new): ffmpeg produces “is_avc” = false with h264_nvenc & tee muxer

[FFmpeg]

#7357: ffmpeg produces “is_avc” = false with h264_nvenc & tee muxer
-------------------------------------+-------------------------------------
             Reporter:  areeb111     |                     Type:  defect
               Status:  new          |                 Priority:  important
            Component:  ffmpeg       |                  Version:
             Keywords:  h264_nvenc,  |  unspecified
  tee muxer                          |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug: I have a  really strange problem when using "-c:v
 h264_nvenc" and "tee muxer" both then the produced output file is having
 "is_avc=false" even i have checked the same input matroska file with
 another server running with Intel QuickSync "-c:v h264_qsv" with the same
 command then the produced output file is "is_avc=true".

 The main reason that i want the "is_avc=true" is because the files must be
 played using "nginx-vod-module" which requires the AVC video format to be
 streamed.

 How to reproduce:
 {{{
 % /root/ffmpeg  -y -t 00:00:50 -i "testinput.mkv" -filter_complex
 "[0:v]split=2[s0][s1];[s0]scale=-2:720[v0];[s1]scale=-2:360[v1]" -map
 "[v0]" -map "[v1]" -map 0:a -c:v h264_nvenc -b:v:0 1100k -b:v:1 600k
 -profile:v:0 main -profile:v:1 baseline -level:v:0 4 -level:v:1 3.1 -ac 2
 -c:a aac -b:a 128k -af "aresample=async=1000:first_pts=0"  -f tee
 "[select=\'v:0,a\']testoutput.mp4|[select=\'v:1,a\']testoutput-360.mp4"

 }}}

 {{{
 ffmpeg version: N-91182-gbdf1bbd Copyright (c) 2000-2018 the FFmpeg
 developers   built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-28)
 }}}

 {{{
 built on CentOS 7.3.1611 + NVIDIA Driver (NVIDIA-Linux-x86_64-390.77.run)
 + CUDA (cuda-repo-rhel7-9-2-local-9.2.88-1.x86_64.rpm) + NVIDIA K2000 GPU
 Card Installed
 }}}


 ----
 Running ffprobe for the output file to check "is_avc":

 {{{ ffprobe -v quiet -print_format json -show_format -show_streams
 testoutput.mp4 }}}
 ----
 {{{
  {
     "streams": [
         {
             "index": 0,
             "codec_name": "h264",
             "codec_long_name": "H.264 / AVC / MPEG-4 AVC / MPEG-4 part
 10",
             "profile": "Main",
             "codec_type": "video",
             "codec_time_base": "1001/48000",
             "codec_tag_string": "avc1",
             "codec_tag": "0x31637661",
             "width": 1280,
             "height": 720,
             "coded_width": 1280,
             "coded_height": 720,
             "has_b_frames": 0,
             "sample_aspect_ratio": "1:1",
             "display_aspect_ratio": "16:9",
             "pix_fmt": "yuv420p",
             "level": 40,
             "chroma_location": "left",
             "refs": 1,
             "is_avc": "false",
             "nal_length_size": "0",
             "r_frame_rate": "24000/1001",
             "avg_frame_rate": "24000/1001",
             "time_base": "1/24000",
             "start_pts": 984,
             "start_time": "0.041000",
             "duration_ts": 1201200,
             "duration": "50.050000",
             "bit_rate": "845035",
             "bits_per_raw_sample": "8",
             "nb_frames": "1199",
             "disposition": {
                 "default": 1,
                 "dub": 0,
                 "original": 0,
                 "comment": 0,
                 "lyrics": 0,
                 "karaoke": 0,
                 "forced": 0,
                 "hearing_impaired": 0,
                 "visual_impaired": 0,
                 "clean_effects": 0,
                 "attached_pic": 0,
                 "timed_thumbnails": 0
             },
             "tags": {
                 "language": "und",
                 "handler_name": "VideoHandler"
             }
         },
         {
             "index": 1,
             "codec_name": "aac",
             "codec_long_name": "AAC (Advanced Audio Coding)",
             "profile": "LC",
             "codec_type": "audio",
             "codec_time_base": "1/48000",
             "codec_tag_string": "mp4a",
             "codec_tag": "0x6134706d",
             "sample_fmt": "fltp",
             "sample_rate": "48000",
             "channels": 2,
             "channel_layout": "stereo",
             "bits_per_sample": 0,
             "r_frame_rate": "0/0",
             "avg_frame_rate": "0/0",
             "time_base": "1/48000",
             "start_pts": 0,
             "start_time": "0.000000",
             "duration_ts": 2401488,
             "duration": "50.031000",
             "bit_rate": "129153",
             "max_bit_rate": "129153",
             "nb_frames": "2346",
             "disposition": {
                 "default": 1,
                 "dub": 0,
                 "original": 0,
                 "comment": 0,
                 "lyrics": 0,
                 "karaoke": 0,
                 "forced": 0,
                 "hearing_impaired": 0,
                 "visual_impaired": 0,
                 "clean_effects": 0,
                 "attached_pic": 0,
                 "timed_thumbnails": 0
             },
             "tags": {
                 "language": "ger",
                 "handler_name": "SoundHandler"
             }
         }
     ],
     "format": {
         "filename": "testoutput.mp4",
         "nb_streams": 2,
         "nb_programs": 0,
         "format_name": "mov,mp4,m4a,3gp,3g2,mj2",
         "format_long_name": "QuickTime / MOV",
         "start_time": "0.000000",
         "duration": "50.031000",
         "size": "6116472",
         "bit_rate": "978029",
         "probe_score": 100,
         "tags": {
             "major_brand": "isom",
             "minor_version": "512",
             "compatible_brands": "isomiso2avc1mp41",
             "encoder": "Lavf58.17.100"
         }
     }
 }
 }}}



 Please anyone can help me why is the output video file is getting
 "is_avc=false" ?

 Is there any option to force it ?

 Thank you

--
Ticket URL: <https://trac.ffmpeg.org/ticket/7357>
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