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• HEVC with alpha [closed]

  3 mai 2024, par foxhable

  I trying create HEVC with alpha video from png images through ffmpeg.

  


  When i try, it outputs a video that works, has a transparent background and opens in QuickTime, but does not open in Safari. Then i try creating in prores 4444 codec and convert from macOS Context Menu -> Encode Selected Video Files with HEVC 1080p and Preserve Transparency. It has work - video with transparent background, open in QuickTime and in Safari.

  


  So i tried understand what a difference in meta data and only what i find its working video has HVEC encoder, but not working has Lavc61.5.103 hevc_videotoolbox. Can i somehow programmatically or from utilities like ffmpeg create video with HEVC With alpha, which working like from macOS context menu ? macOS context menu doesnt fit because i cant compress or create many videos

  


  Detail info

  


  I have example of working video. Info from ffprobe

  


  ffprobe movie-hevc.mov
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '.\movie-hevc.mov':
  Metadata:
    major_brand     : qt
    minor_version   : 0
    compatible_brands: qt
    creation_time   : 2021-01-02T10:33:38.000000Z
  Duration: 00:00:09.02, start: 0.000000, bitrate: 4053 kb/s
  Stream #0:0[0x1](und): Video: hevc (Main) (hvc1 / 0x31637668), yuv420p(tv, progressive), 1280x720 [SAR 1:1 DAR 16:9], 4046 kb/s, 60 fps, 60 tbr, 600 tbn (default)
      Metadata:
        creation_time   : 2021-01-02T10:33:38.000000Z
        handler_name    : Core Media Video
        vendor_id       : [0][0][0][0]
        encoder         : HEVC


  


  Info about video which i create in prores by ffmpeg command, then convert through macOS context menu

  


  command :

  


  ffmpeg -i a%d.png -r 30 -c:v prores_ks -profile:v 4  -allow_sw 1 -alpha_quality 1 -vtag hvc1 prores.mov


  


  info after converting

  


  ffprobe .\native-hevc.mov
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '.\native-hevc.mov':
  Metadata:
    major_brand     : qt
    minor_version   : 0
    compatible_brands: qt
    creation_time   : 2024-05-03T07:04:26.000000Z
  Duration: 00:00:12.77, start: 0.000000, bitrate: 8796 kb/s
  Stream #0:0[0x1](und): Video: hevc (Main) (hvc1 / 0x31637668), yuv420p(tv, bt709), 1920x1920, 8792 kb/s, 30 fps, 30 tbr, 15360 tbn (default)
      Metadata:
        creation_time   : 2024-05-03T07:04:27.000000Z
        handler_name    : Core Media Video
        vendor_id       : [0][0][0][0]
        encoder         : HEVC


  


  Info about video which i`m create direct in hevc by ffmpeg command

  


  ffmpeg -i a%d.png -r 30 -c:v hevc_videotoolbox -allow_sw 1 -alpha_quality 1 -vtag hvc1 ffmpeg-hevc.mov


  


  Info :

  


  ffprobe .\ffmpeg-hevc.mov
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '.\ffmpeg-hevc.mov':
  Metadata:
    major_brand     : qt
    minor_version   : 512
    compatible_brands: qt
    encoder         : Lavf61.3.103
  Duration: 00:00:12.77, start: 0.000000, bitrate: 3437 kb/s
  Stream #0:0[0x1]: Video: hevc (Main) (hvc1 / 0x31637668), yuv420p(tv, bottom coded first (swapped)), 1920x1920, 3435 kb/s, 30 fps, 30 tbr, 15360 tbn (default)
      Metadata:
        handler_name    : VideoHandler
        vendor_id       : FFMP
        encoder         : Lavc61.5.103 hevc_videotoolbox


  


  also i tried :

  


  

  • props -allow_sw 0 - get error

  


  • -alpha-quality 0.75, -pix_fmt bgra - safari not open, QT yes, transparent bg

  


  • without -vtag hvc1 - QuickTime cannot open

  


  • Tried convert from webm to hevc_videotoolbox - safari not open, QT yes, transparent bg

  


  • tried convert webm into pngs and in hevc_videotoolbox - safari not open, QT yes, transparent bg

  


  


  Tried answers :

  


  

  • https://stackoverflow.com/a/61663438

  


  • https://stackoverflow.com/a/69262399/17330336

  


  


  mac info :

  


  

  • macOS Monterey 12.7.2

  


  • Mac mini (Late 2012)

  


  • Core i5 3210M

  


  • Graphics Intel HD 4000

  


  


• avutil : Fix linking x86 asm constants with Clang in MSVC mode

  12 juin, par Martin Storsjö

  avutil : Fix linking x86 asm constants with Clang in MSVC mode
  This fixes building with Clang in MSVC mode, for x86, which was
  
  broken in 6e49b8699657b808b7dc80033f2c3f2d0e029fa3 (in Nov 2024) ;
  
  previously it failed with undefined symbols for the constants
  
  defined with DECLARE_ASM_CONST, accessed via inline assembly.
  Before 57861911a34e1c33796be97f2b2f44e05fffd647, there was an
  
      #elif defined(__GNUC__) || defined(__clang__)
  
  case before the
  
      #elif defined(_MSC_VER)
  
  case for defining DECLARE_ASM_CONST, which included av_used.
  
  (This case included the explicit "defined(__clang__)" since
  
  f637046d3134a331e4b5a7243ac3dfb92735b8a5.)
  After 57861911a34e1c33796be97f2b2f44e05fffd647, it used the
  
  generic definition of DECLARE_ASM_CONST that also included
  
  av_used - which also worked for Clang in MSVC mode. But after
  
  6e49b8699657b808b7dc80033f2c3f2d0e029fa3, Clang in MSVC mode
  
  ended up using the MSVC specific variant which lacked the
  
  av_used declaration, causing linker errors due to undefined
  
  symbols.
  Signed-off-by : Martin Storsjö <martin@martin.st>
  

  • [DH] libavutil/mem_internal.h

• FFmpeg wrong codecstring for DASH manifest [closed]

  21 novembre 2024, par Suxsem

  I'm trying to create a DASH stream with ffmpeg with the following command :

  


  ffmpeg -i rtsp://admin:***@camera-retro.lan/ch0_0 ^
       -map 0 ^
       -codec:v copy ^
       -codec:a copy ^
       -f dash ^
       -use_template 1 ^
       -use_timeline 1 ^
       -window_size 50 ^
       -extra_window_size 5 ^
       -seg_duration 5 ^
       tmp/output.mpd


  


  The problem is the generated manifest doesn't contain a valid codecstring for the video part (note the codecs="hev1" part) and thus is not playable by the browser :

  


  &lt;?xml version="1.0" encoding="utf-8"?>&#xA;<mpd xmlns="urn:mpeg:dash:schema:mpd:2011" profiles="urn:mpeg:dash:profile:isoff-live:2011" type="dynamic" minimumupdateperiod="PT6S" suggestedpresentationdelay="PT6S" availabilitystarttime="2024-11-21T12:05:52.604Z" publishtime="2024-11-21T12:05:57.559Z" timeshiftbufferdepth="PT5M1.9S" maxsegmentduration="PT5.0S" minbuffertime="PT12.0S">&#xA;    <programinformation>&#xA;        &#xA;    </programinformation>&#xA;    <servicedescription>&#xA;    </servicedescription>&#xA;    <period start="PT0.0S">&#xA;        <adaptationset contenttype="video" startwithsap="1" segmentalignment="true" bitstreamswitching="true" maxwidth="2304" maxheight="1296" par="16:9">&#xA;            <representation mimetype="video/mp4" codecs="hev1" bandwidth="822093" width="2304" height="1296" scantype="unknown" sar="1:1">&#xA;                <segmenttemplate timescale="90000" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startnumber="1">&#xA;                    <segmenttimeline>&#xA;                        <s t="0" d="542990"></s>&#xA;                    </segmenttimeline>&#xA;                </segmenttemplate>&#xA;            </representation>&#xA;        </adaptationset>&#xA;        <adaptationset contenttype="audio" startwithsap="1" segmentalignment="true" bitstreamswitching="true">&#xA;            <representation mimetype="audio/mp4" codecs="mp4a.40.2" bandwidth="34143" audiosamplingrate="16000">&#xA;                <audiochannelconfiguration schemeiduri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="1"></audiochannelconfiguration>&#xA;                <segmenttemplate timescale="16000" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startnumber="1">&#xA;                    <segmenttimeline>&#xA;                        <s t="0" d="81001"></s>&#xA;                    </segmenttimeline>&#xA;                </segmenttemplate>&#xA;            </representation>&#xA;        </adaptationset>&#xA;    </period>&#xA;</mpd>&#xA;

  


  This is the output of ffprobe :

  


  SDP:
v=0
o=- 1732188474342789 1 IN IP4 192.168.12.162
s=Session streamed by "rRTSPServer"
i=ch0_0.h264
t=0 0
a=tool:LIVE555 Streaming Media v2023.01.19
a=type:broadcast
a=control:*
a=range:npt=now-
a=x-qt-text-nam:Session streamed by "rRTSPServer"
a=x-qt-text-inf:ch0_0.h264
m=video 0 RTP/AVP 96
c=IN IP4 0.0.0.0
b=AS:700
a=rtpmap:96 H265/90000
a=fmtp:96 profile-space=0;profile-id=1;tier-flag=0;level-id=186;interop-constraints=000000000000;sprop-vps=QAEMAf//AWAAAAMAAAMAAAMAAAMAuqwJ;sprop-sps=QgEBAWAAAAMAAAMAAAMAAAMAuqABICAFEf5a7kSIi/Lc1AQEBAI=;sprop-pps=RAHA8oSJAzJA
a=control:track1
m=audio 0 RTP/AVP 97
c=IN IP4 0.0.0.0
b=AS:32
a=rtpmap:97 MPEG4-GENERIC/16000
a=fmtp:97 streamtype=5;profile-level-id=1;mode=AAC-hbr;sizelength=13;indexlength=3;indexdeltalength=3;config=1408
a=control:track2


  


  it seems to me that all codec informations are present :

  


  a=fmtp:96 profile-space=0;profile-id=1;tier-flag=0;level-id=186;interop-constraints=000000000000;


  


  why ffmpeg is putting only codecs="hev1" instead of the full codecstring (containing the profile, the level and the constraints) ?

  


  Thank you