From: Kieran Kunhya <kierank@obe.tv>
To: Soft Works <softworkz@hotmail.com>
Cc: Kieran Kunhya <kierank@obe.tv>,
FFmpeg development discussions and patches
<ffmpeg-devel@ffmpeg.org>
Subject: Re: [FFmpeg-devel] [PATCH 0/6] Implement SEI parsing for QSV decoders
Date: Wed, 1 Jun 2022 21:25:40 +0100
Message-ID: <CAK+ULv5iZwkfVfSr=YMZA=JO=JQpRg_ZQWGfwTQx39cYk6xD1A@mail.gmail.com> (raw)
In-Reply-To: <DM8P223MB036563D5D65A381A4637C4B9BADF9@DM8P223MB0365.NAMP223.PROD.OUTLOOK.COM>
>
> Captions aren’t exactly “frame accurate” anyway as each frame has just a
> very small piece
>
> of information and only when a certain sequence is complete, it leads to
> some new letters
>
> or line being ready for display.
>
In many use-cases, you want them to be frame-accurate. Final rendition to
the viewer is only one use-case of FFmpeg (to be fair, the likely use-case
of QSV)
And you don't want errors accumulating across encode cycles.
> Do you have an idea where/how I could find such stream?
>
You would need to record them off various television services as they use a
wide range of encoder manufacturers.
Ideally, you could also inject them into various encoders and force them to
build complex reordering patterns and check they are frame accurate.
Regards,
Kieran
>
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next prev parent reply other threads:[~2022-06-01 20:26 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-26 8:08 ffmpegagent
2022-05-26 8:08 ` [FFmpeg-devel] [PATCH 1/6] avutil/frame: Add av_frame_copy_side_data() and av_frame_remove_all_side_data() softworkz
2022-05-27 14:35 ` Soft Works
2022-05-26 8:08 ` [FFmpeg-devel] [PATCH 2/6] avcodec/vpp_qsv: Copy side data from input to output frame softworkz
2022-05-31 9:19 ` Xiang, Haihao
2022-05-26 8:08 ` [FFmpeg-devel] [PATCH 3/6] avcodec/mpeg12dec: make mpeg_decode_user_data() accessible softworkz
2022-05-31 9:24 ` Xiang, Haihao
2022-05-26 8:08 ` [FFmpeg-devel] [PATCH 4/6] avcodec/hevcdec: make set_side_data() accessible softworkz
2022-05-31 9:38 ` Xiang, Haihao
2022-05-31 16:03 ` Soft Works
2022-05-31 9:40 ` Xiang, Haihao
2022-05-26 8:08 ` [FFmpeg-devel] [PATCH 5/6] avcodec/h264dec: make h264_export_frame_props() accessible softworkz
2022-05-26 8:08 ` [FFmpeg-devel] [PATCH 6/6] avcodec/qsvdec: Implement SEI parsing for QSV decoders softworkz
2022-06-01 5:15 ` Xiang, Haihao
2022-06-01 8:51 ` Soft Works
2022-06-01 9:06 ` [FFmpeg-devel] [PATCH v2 0/6] " ffmpegagent
2022-06-01 9:06 ` [FFmpeg-devel] [PATCH v2 1/6] avutil/frame: Add av_frame_copy_side_data() and av_frame_remove_all_side_data() softworkz
2022-06-01 9:06 ` [FFmpeg-devel] [PATCH v2 2/6] avcodec/vpp_qsv: Copy side data from input to output frame softworkz
2022-06-01 9:06 ` [FFmpeg-devel] [PATCH v2 3/6] avcodec/mpeg12dec: make mpeg_decode_user_data() accessible softworkz
2022-06-01 9:06 ` [FFmpeg-devel] [PATCH v2 4/6] avcodec/hevcdec: make set_side_data() accessible softworkz
2022-06-01 9:06 ` [FFmpeg-devel] [PATCH v2 5/6] avcodec/h264dec: make h264_export_frame_props() accessible softworkz
2022-06-01 9:06 ` [FFmpeg-devel] [PATCH v2 6/6] avcodec/qsvdec: Implement SEI parsing for QSV decoders softworkz
2022-06-01 17:20 ` Xiang, Haihao
2022-06-01 17:50 ` Soft Works
2022-06-01 18:01 ` [FFmpeg-devel] [PATCH v3 0/6] " ffmpegagent
2022-06-01 18:01 ` [FFmpeg-devel] [PATCH v3 1/6] avutil/frame: Add av_frame_copy_side_data() and av_frame_remove_all_side_data() softworkz
2022-06-24 7:01 ` Xiang, Haihao
2022-06-26 23:35 ` Soft Works
2022-06-01 18:01 ` [FFmpeg-devel] [PATCH v3 2/6] avcodec/vpp_qsv: Copy side data from input to output frame softworkz
2022-06-01 18:01 ` [FFmpeg-devel] [PATCH v3 3/6] avcodec/mpeg12dec: make mpeg_decode_user_data() accessible softworkz
2022-06-01 18:01 ` [FFmpeg-devel] [PATCH v3 4/6] avcodec/hevcdec: make set_side_data() accessible softworkz
2022-06-01 18:01 ` [FFmpeg-devel] [PATCH v3 5/6] avcodec/h264dec: make h264_export_frame_props() accessible softworkz
2022-06-01 18:01 ` [FFmpeg-devel] [PATCH v3 6/6] avcodec/qsvdec: Implement SEI parsing for QSV decoders softworkz
2022-06-26 23:41 ` [FFmpeg-devel] [PATCH v4 0/6] " ffmpegagent
2022-06-26 23:41 ` [FFmpeg-devel] [PATCH v4 1/6] avutil/frame: Add av_frame_copy_side_data() and av_frame_remove_all_side_data() softworkz
2022-06-26 23:41 ` [FFmpeg-devel] [PATCH v4 2/6] avcodec/vpp_qsv: Copy side data from input to output frame softworkz
2022-06-26 23:41 ` [FFmpeg-devel] [PATCH v4 3/6] avcodec/mpeg12dec: make mpeg_decode_user_data() accessible softworkz
2022-06-26 23:41 ` [FFmpeg-devel] [PATCH v4 4/6] avcodec/hevcdec: make set_side_data() accessible softworkz
2022-06-26 23:41 ` [FFmpeg-devel] [PATCH v4 5/6] avcodec/h264dec: make h264_export_frame_props() accessible softworkz
2022-06-26 23:41 ` [FFmpeg-devel] [PATCH v4 6/6] avcodec/qsvdec: Implement SEI parsing for QSV decoders softworkz
2022-06-28 4:16 ` Andreas Rheinhardt
2022-06-28 5:25 ` Soft Works
2022-06-27 4:18 ` [FFmpeg-devel] [PATCH v4 0/6] " Xiang, Haihao
2022-07-01 20:48 ` [FFmpeg-devel] [PATCH v5 " ffmpegagent
2022-07-01 20:48 ` [FFmpeg-devel] [PATCH v5 1/6] avutil/frame: Add av_frame_copy_side_data() and av_frame_remove_all_side_data() softworkz
2022-07-01 20:48 ` [FFmpeg-devel] [PATCH v5 2/6] avcodec/vpp_qsv: Copy side data from input to output frame softworkz
2022-07-01 20:48 ` [FFmpeg-devel] [PATCH v5 3/6] avcodec/mpeg12dec: make mpeg_decode_user_data() accessible softworkz
2022-07-01 20:48 ` [FFmpeg-devel] [PATCH v5 4/6] avcodec/hevcdec: make set_side_data() accessible softworkz
2022-07-01 20:48 ` [FFmpeg-devel] [PATCH v5 5/6] avcodec/h264dec: make h264_export_frame_props() accessible softworkz
2022-07-01 20:48 ` [FFmpeg-devel] [PATCH v5 6/6] avcodec/qsvdec: Implement SEI parsing for QSV decoders softworkz
2022-07-19 6:55 ` [FFmpeg-devel] [PATCH v5 0/6] " Xiang, Haihao
2022-07-21 21:06 ` Soft Works
2022-07-21 21:56 ` Andreas Rheinhardt
2022-10-21 7:42 ` Soft Works
2022-10-25 4:03 ` [FFmpeg-devel] [PATCH v6 0/3] " ffmpegagent
2022-10-25 4:03 ` [FFmpeg-devel] [PATCH v6 1/3] avcodec/hevcdec: factor out ff_hevc_set_set_to_frame softworkz
2022-10-25 4:03 ` [FFmpeg-devel] [PATCH v6 2/3] avcodec/h264dec: make h264_export_frame_props() accessible softworkz
2022-10-25 4:03 ` [FFmpeg-devel] [PATCH v6 3/3] avcodec/qsvdec: Implement SEI parsing for QSV decoders softworkz
2022-11-21 2:44 ` Xiang, Haihao
2022-11-21 15:58 ` Soft Works
2022-11-22 5:41 ` Xiang, Haihao
2022-06-01 19:15 ` [FFmpeg-devel] [PATCH 0/6] " Kieran Kunhya
2022-06-01 19:46 ` Soft Works
2022-06-01 20:25 ` Kieran Kunhya [this message]
2022-06-01 21:24 ` Soft Works
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