> On 2 Mar 2023, at 12:55, Robert Krüger <[email protected]> wrote: > > On Wed, Mar 1, 2023 at 4:07 PM Ferdi Scholten <[email protected]> wrote: > >> Hi, >>> if I invoke ffmpeg on an M2V MPEG-2 elementary stream, I get "N/A" for >> the >>> duration. I guess this is because this file doesn't contain a header that >>> contains the duration. Is it possible to force ffmpeg to parse the entire >>> file to obtain the duration? >>> >>> Full command line and output: >>> >>> ffmpeg -i >>> >> /Users/krueger/lesspain/samples/software/compressor/compressor_dvd_mpeg2_480_24p.m2v >>> >>> ffmpeg version N-109938-g67fd1b79e7 Copyright (c) 2000-2023 the FFmpeg >>> developers >>> built with Apple clang version 11.0.0 (clang-1100.0.33.17) >>> configuration: >>> libavutil 58. 3.100 / 58. 3.100 >>> libavcodec 60. 5.100 / 60. 5.100 >>> libavformat 60. 4.100 / 60. 4.100 >>> libavdevice 60. 2.100 / 60. 2.100 >>> libavfilter 9. 4.100 / 9. 4.100 >>> libswscale 7. 2.100 / 7. 2.100 >>> libswresample 4. 11.100 / 4. 11.100 >>> Input #0, mpegvideo, from >>> >> '/Users/krueger/lesspain/samples/software/compressor/compressor_dvd_mpeg2_480_24p.m2v': >>> Duration: N/A, bitrate: N/A >>> Stream #0:0: Video: mpeg2video (Main), yuv420p(tv, smpte170m, >>> progressive), 720x480 [SAR 32:27 DAR 16:9], 30 fps, 59.94 tbr, 1200k tbn >>> Side data: >>> cpb: bitrate max/min/avg: 7700000/0/0 buffer size: 1835008 >> vbv_delay: >>> N/A >>> At least one output file must be specified >>> >>> Thanks, >>> Robert >>> >> You can use -analyzeduration 10000000M -probesize 10000000M for example >> to scan more of the input file. like this: >> >> ffmpeg -i -analyzeduration 10000000M -probesize 10000000M >> /Users/krueger/lesspain/samples/software/compressor/compressor_dvd_mpeg2_480_24p.m2v >> >> > Thanks. I tried that and used values that were way beyond the actual file > duration and size and that didn't change the result, i.e. I still get "N/A" > for the duration. It looks a bit as if getting exact duration by iterating > through the packets isn't supported at all. Can someone confirm this? > > Thanks, > Robert >
Try this: mediainfo —parsespeed=1 <filename> — Sent from my Wang Office iPhone 🤔 Peter VDH _______________________________________________ ffmpeg-user mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
