<div dir="auto"><div> <div class="gmail_quote"><div dir="ltr" class="gmail_attr">Le mer. 8 mai 2019 06 h 55, chakra <<a href="mailto:wire.chakri@gmail.com">wire.chakri@gmail.com</a>> a écrit : </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Yes even I am facing same issue. But for my use case the .mp4 file does not play out on Chrome browser via HTML5 <video> tag. If I ffprobe the mp4 file the output shows as below, *ffprobe -i 10__467118902.mp4 -v quiet -print_format json -show_format -show_streams -hide_banner* /{ "streams": [ { "index": 0, "codec_name": "h264", "codec_long_name": "H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10", "profile": "Baseline", "codec_type": "video", "codec_time_base": "1001/30000", "codec_tag_string": "avc1", "codec_tag": "0x31637661", "width": 3840, "height": 2160, "coded_width": 3840, "coded_height": 2160, "has_b_frames": 0, "sample_aspect_ratio": "1:1", "display_aspect_ratio": "16:9", "pix_fmt": "yuvj420p", "level": 51, "color_range": "pc", "color_space": "bt709", "color_transfer": "bt709", "color_primaries": "bt709", "chroma_location": "left", "refs": 1, "is_avc": "1", "nal_length_size": "4", "r_frame_rate": "30000/2002", "avg_frame_rate": "80802120/5392049", "time_base": "1/1498", *"start_pts": -226, "start_time": "-0.150868",* </blockquote></div></div><div dir="auto"> </div><div dir="auto">Just a guess, but have you considered adding an rtpjitterbuffer in your receiver. One of its roles is to fix the timestamps. That being said, RTP CTS (PTS / DTS delta) are not accurate, so I'd recommend not using b-frames.</div><div dir="auto"> </div><div dir="auto"> </div><div dir="auto"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> "duration_ts": 5392049, "duration": "3599.498665", "bit_rate": "3067876", "bits_per_raw_sample": "8", "nb_frames": "53940", "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 }, "tags": { "creation_time": "2019-05-06 15:02:06", "language": "und", "handler_name": "VideoHandler" } } ], "format": { "filename": "13162491-8246-4f51-a37a-32fd56a87b91__9a0ad778-f8d5-4ae8-b74d-735609784cb7__HD_CAM-10__467118902.mp4", "nb_streams": 1, "nb_programs": 0, "format_name": "mov,mp4,m4a,3gp,3g2,mj2", "format_long_name": "QuickTime / MOV", "start_time": "-0.150868", "duration": "3599.498665", "size": "1416353518", "bit_rate": "3147890", "probe_score": 100, "tags": { "major_brand": "mp42", "minor_version": "0", "compatible_brands": "mp42mp41isomiso2", "creation_time": "2019-05-06 15:02:06" } } }/ And I tried to fix the file by moving the start time with command as below, *ffmpeg -i 10__467118902.mp4 -vcodec copy -ss -0.08 10__467118902_fixed.mp4* And now the generated/fixed mp4 has ffprobe summary as, /{ "streams": [ { "index": 0, "codec_name": "h264", "codec_long_name": "H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10", "profile": "Baseline", "codec_type": "video", "codec_time_base": "1001/30000", "codec_tag_string": "avc1", "codec_tag": "0x31637661", "width": 3840, "height": 2160, "coded_width": 3840, "coded_height": 2160, "has_b_frames": 1, "sample_aspect_ratio": "1:1", "display_aspect_ratio": "16:9", "pix_fmt": "yuvj420p", "level": 51, "color_range": "pc", "color_space": "bt709", "color_transfer": "bt709", "color_primaries": "bt709", "chroma_location": "left", "refs": 1, "is_avc": "1", "nal_length_size": "4", "r_frame_rate": "15000/1001", "avg_frame_rate": "10100265/674006", "time_base": "1/11984", * "start_pts": 959, "start_time": "0.080023",* "duration_ts": 43136384, "duration": "3599.497997", "bit_rate": "3067876", "bits_per_raw_sample": "8", "nb_frames": "53940", "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 }, "tags": { "language": "und", "handler_name": "VideoHandler" } } ], "format": { "filename": "13162491-8246-4f51-a37a-32fd56a87b91__9a0ad778-f8d5-4ae8-b74d-735609784cb7__HD_CAM-10__467118902_fixed.mp4", "nb_streams": 1, "nb_programs": 0, "format_name": "mov,mp4,m4a,3gp,3g2,mj2", "format_long_name": "QuickTime / MOV", "start_time": "0.080023", "duration": "3599.498000", "size": "1381447545", "bit_rate": "3070311", "probe_score": 100, "tags": { "major_brand": "isom", "minor_version": "512", "compatible_brands": "isomiso2avc1mp41", "encoder": "Lavf56.40.101" } } } / And its perfectly playable now on Chrome browser. But I am looking for a stable fix by source at GStreamer muxer itself rather than employing another library/ffmpeg as post processing step to handle this I have seen an issue on Chrome in regard to this, <a href="https://bugs.chromium.org/p/chromium/issues/detail?id=715398" rel="noreferrer noreferrer" target="_blank">https://bugs.chromium.org/p/chromium/issues/detail?id=715398</a> But its commented that issue is with mp4mux and has to be fixed on source while recording by muxer itself. Chrome logs error as below, *[6448:20468:0408/123832.116:VERBOSE1:network_delegate.cc(32)] NetworkDelegate::NotifyBeforeURLRequest: <a href="http://127.0.0.1:8445/10__467118902.mp4" rel="noreferrer noreferrer" target="_blank">http://127.0.0.1:8445/10__467118902.mp4</a> [10356:8540:0408/123832.215:ERROR:render_media_log.cc(30)] MediaEvent: MEDIA_ERROR_LOG_ENTRY {"error":"FFmpegDemuxer: unfixable negative timestamp."} [10356:8540:0408/123832.215:ERROR:render_media_log.cc(30)] MediaEvent: MEDIA_ERROR_LOG_ENTRY {"error":"FFmpegDemuxer: demuxer error: 13"} [10356:5076:0408/123832.215:ERROR:render_media_log.cc(30)] MediaEvent: PIPELINE_ERROR DEMUXER_ERROR_COULD_NOT_PARSE* Any help/suggestions in highly appreciated Thanks -- Sent from: <a href="http://gstreamer-devel.966125.n4.nabble.com/" rel="noreferrer noreferrer" target="_blank">http://gstreamer-devel.966125.n4.nabble.com/</a> _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.freedesktop.org" target="_blank" rel="noreferrer">gstreamer-devel@lists.freedesktop.org</a> <a href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" rel="noreferrer noreferrer" target="_blank">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a></blockquote></div></div></div>