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FFMPEG Concat DNxHD-Files : wrong duration of output-file
4 mai 2020, par ThomasI have AVID-DNxHD-files created by Ikegami EditCamHD and FFMPEG-coded DNxHD-Files.



Ikegami-Files are 1080/25psF at 185MBit/sec (10Bit). FFMPEG-Files are crated with this command :



ffmpeg -loop 1 -i c:\pics\VideoNichtVorhanden.jpg -s 1920x1080 -r 25 -t 92.8 -c:v dnxhd -b:v 185M -pix_fmt yuv422p10le d:\MissingFiles\missing_0001.mov




ffprobe from Ikegami-file :



{
 "streams": [
 {
 "index": 0,
 "codec_name": "dnxhd",
 "codec_long_name": "VC3\/DNxHD",
 "profile": "DNXHD",
 "codec_type": "video",
 "codec_time_base": "1\/25",
 "codec_tag_string": "[0][0][0][0]",
 "codec_tag": "0x0000",
 "width": 1920,
 "height": 1080,
 "coded_width": 1920,
 "coded_height": 1088,
 "has_b_frames": 0,
 "sample_aspect_ratio": "1:1",
 "display_aspect_ratio": "16:9",
 "pix_fmt": "yuv422p10le",
 "level": -99,
 "color_space": "bt709",
 "field_order": "tt",
 "refs": 1,
 "r_frame_rate": "25\/1",
 "avg_frame_rate": "25\/1",
 "time_base": "1\/25",
 "start_pts": 0,
 "start_time": "0.000000",
 "duration_ts": 827,
 "duration": "33.080000",
 "bits_per_raw_sample": "10",
 "disposition": {
 "default": 0,
 "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": {
 "file_package_umid": "0x060A2B340101010101010F0013000000D6F21F070302074C060E2B347F7F2A80",
 "file_package_name": "File Package",
 "track_name": "V1"
 }
 },
 {
 "index": 1,
 "codec_type": "data",
 "codec_tag_string": "[0][0][0][0]",
 "codec_tag": "0x0000",
 "r_frame_rate": "0\/0",
 "avg_frame_rate": "0\/0",
 "time_base": "1\/90000",
 "start_pts": 0,
 "start_time": "0.000000",
 "duration_ts": 2977200,
 "duration": "33.080000",
 "disposition": {
 "default": 0,
 "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": {
 "file_package_umid": "0x060A2B34010101010101080013000000D6F21F070276074C060E2B347F7F2A80",
 "track_name": "A1",
 "data_type": "audio"
 }
 },
 {
 "index": 2,
 "codec_type": "data",
 "codec_tag_string": "[0][0][0][0]",
 "codec_tag": "0x0000",
 "r_frame_rate": "0\/0",
 "avg_frame_rate": "0\/0",
 "time_base": "1\/90000",
 "start_pts": 0,
 "start_time": "0.000000",
 "duration_ts": 2977200,
 "duration": "33.080000",
 "disposition": {
 "default": 0,
 "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": {
 "file_package_umid": "0x060A2B34010101010101080013000000D6F21F07028A074C060E2B347F7F2A80",
 "track_name": "A2",
 "data_type": "audio"
 }
 }
 ],
 "format": {
 "filename": "G:\\MXF-sortiert\\Ikegami\\2018-04-10\\V\\MULTI_NN17GN0V\\NN17GN0V.0001.MXF",
 "nb_streams": 3,
 "nb_programs": 0,
 "format_name": "mxf",
 "format_long_name": "MXF (Material eXchange Format)",
 "start_time": "0.000000",
 "duration": "33.080000",
 "size": "761004264",
 "bit_rate": "184039725",
 "probe_score": 100,
 "tags": {
 "operational_pattern_ul": "060e2b34.04010102.0d010201.10030000",
 "uid": "caf0bf8e-ff07-b34d-9616-bc3e7bd32d54",
 "generation_uid": "fb90769f-a46d-d546-983d-dda63339a8fd",
 "company_name": "Ikegami",
 "product_name": "HDN-X10",
 "product_version": "1.30d",
 "product_uid": "3e2189d7-294b-4612-8243-1b1990e14055",
 "modification_date": "2018-04-10T05:57:59.788000Z",
 "material_package_umid": "0x060A2B340101010101010F0013000000D6F21F070262074C060E2B347F7F2A80",
 "material_package_name": "01047",
 "timecode": "01:23:17:03"
 }
 }
}




ffprobe from ffmpeg-coded-file :



{
 "streams": [
 {
 "index": 0,
 "codec_name": "dnxhd",
 "codec_long_name": "VC3\/DNxHD",
 "profile": "DNXHD",
 "codec_type": "video",
 "codec_time_base": "1\/25",
 "codec_tag_string": "AVdn",
 "codec_tag": "0x6e645641",
 "width": 1920,
 "height": 1080,
 "coded_width": 1920,
 "coded_height": 1088,
 "has_b_frames": 0,
 "sample_aspect_ratio": "1:1",
 "display_aspect_ratio": "16:9",
 "pix_fmt": "yuv422p10le",
 "level": -99,
 "color_range": "tv",
 "color_space": "bt709",
 "refs": 1,
 "r_frame_rate": "25\/1",
 "avg_frame_rate": "25\/1",
 "time_base": "1\/12800",
 "start_pts": 0,
 "start_time": "0.000000",
 "duration_ts": 1187840,
 "duration": "92.800000",
 "bit_rate": "183500800",
 "bits_per_raw_sample": "10",
 "nb_frames": "2320",
 "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": {
 "handler_name": "VideoHandler",
 "encoder": "Lavc58.54.100 dnxhd"
 }
 }
 ],
 "format": {
 "filename": "G:\\MXF-sortiert\\Ikegami\\2018-04-10\\V\\MULTI_NN1EUS0V\\MXF\\NN1EUS0V.0001.mov",
 "nb_streams": 1,
 "nb_programs": 0,
 "format_name": "mov,mp4,m4a,3gp,3g2,mj2",
 "format_long_name": "QuickTime \/ MOV",
 "start_time": "0.000000",
 "duration": "92.800000",
 "size": "2128619444",
 "bit_rate": "183501676",
 "probe_score": 100,
 "tags": {
 "major_brand": "qt ",
 "minor_version": "512",
 "compatible_brands": "qt ",
 "encoder": "Lavf58.29.100"
 }
 }
}




When I concat for example one .mxf with one .mov and another .mxf at the end, the duration is frong (about 26 Miuntes when it should be some 4 Minutes or so) and VLC-Player gives a Framerate of a very slow framerate and the video does not play the ffmpeg coded part.



ffprobe from concat-output :



{
 "streams": [
 {
 "index": 0,
 "codec_name": "dnxhd",
 "codec_long_name": "VC3\/DNxHD",
 "profile": "DNXHD",
 "codec_type": "video",
 "codec_time_base": "20268137\/1351040",
 "codec_tag_string": "AVdn",
 "codec_tag": "0x6e645641",
 "width": 1920,
 "height": 1080,
 "coded_width": 1920,
 "coded_height": 1088,
 "has_b_frames": 0,
 "sample_aspect_ratio": "1:1",
 "display_aspect_ratio": "16:9",
 "pix_fmt": "yuv422p10le",
 "level": -99,
 "color_range": "tv",
 "color_space": "bt709",
 "refs": 1,
 "r_frame_rate": "25\/1",
 "avg_frame_rate": "1351040\/20268137",
 "time_base": "1\/12800",
 "start_pts": 0,
 "start_time": "0.000000",
 "duration_ts": 1216088220,
 "duration": "95006.892188",
 "bit_rate": "489252",
 "bits_per_raw_sample": "10",
 "nb_frames": "6333",
 "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": {
 "handler_name": "VideoHandler"
 }
 }
 ],
 "format": {
 "filename": "G:\\MXF-sortiert\\Ikegami\\2018-04-10\\V\\NN1EUS0V_MIES.mov",
 "nb_streams": 1,
 "nb_programs": 0,
 "format_name": "mov,mp4,m4a,3gp,3g2,mj2",
 "format_long_name": "QuickTime \/ MOV",
 "start_time": "0.000000",
 "duration": "95006.893000",
 "size": "5810367616",
 "bit_rate": "489258",
 "probe_score": 100,
 "tags": {
 "major_brand": "qt ",
 "minor_version": "512",
 "compatible_brands": "qt ",
 "encoder": "Lavf58.29.100"
 }
 }
}




The Ikegami and ffmpeg-coded files for themselves are playing great and do show the correct fps in VLC.



I can see in the probe-logs the



"codec_time_base": "20268137\/1351040"




and



"avg_frame_rate": "1351040\/20268137"




What is going wrong here ? How can I improve the coding-part and / or the concat to get a good result ? Is it only possible with re-encode instead of c:v copy ?



Any help welcome, thanks in advance,



tom