When I run FFMpeg from the command line, like this
ffmpeg.exe -hwaccel auto -re -i "C:\Users\Public\Videos\Sample Videos\Wildlife.wmv" -an -sn -c:v bmp -pix_fmt bgr24 -f rawvideo - > junk.bin
It works great. However, when I create the same (minus > junk.bin ), I get this nasty "bad header" error after a few seconds of playback. What causes this? I have problems with the fact that my process blocks the channel longer than the file system, but it should be able to block the pipe endlessly without breaking the decoding. A truncated stderr is below. My code for creating things is here .
ffmpeg version N-60761-g916a792 Copyright (c) 2000-2014 the FFmpeg developers built on Feb 19 2014 21:57:22 with gcc 4.8.2 (GCC) configuration: --target-os=mingw32 --enable-shared --enable-runtime-cpudetect libavutil 52. 65.100 / 52. 65.100 libavcodec 55. 52.102 / 55. 52.102 libavformat 55. 33.100 / 55. 33.100 libavdevice 55. 10.100 / 55. 10.100 libavfilter 4. 1.103 / 4. 1.103 libswscale 2. 5.101 / 2. 5.101 libswresample 0. 17.104 / 0. 17.104 cygwin warning: MS-DOS style path detected: C:\Users\Public\Videos\Sample Videos\Wildlife.wmv Preferred POSIX equivalent is: /cygdrive/c/Users/Public/Videos/Sample Videos/Wildlife.wmv CYGWIN environment variable option "nodosfilewarning" turns off this warning. Consult the user guide for more details about POSIX paths: http://cygwin.com/cygwin-ug-net/using.html#using-pathnames [asf @ 0x600059480] Stream #0: not enough frames to estimate rate; consider increasing probesize Guessed Channel Layout for Input Stream #0.0 : stereo Input #0, asf, from 'C:\Users\Public\Videos\Sample Videos\Wildlife.wmv': Metadata: SfOriginalFPS : 299700 WMFSDKVersion : 11.0.6001.7000 WMFSDKNeeded : 0.0.0.0000 comment : Footage: Small World Productions, Inc; Tourism New Zealand | Producer: Gary F. Spradling | Music: Steve Ball title : Wildlife in HD copyright : © 2008 Microsoft Corporation IsVBR : 0 DeviceConformanceTemplate: AP@L3 Duration: 00:00:30.09, start: 0.000000, bitrate: 6977 kb/s Stream #0:0(eng): Audio: wmav2 (a[1][0][0] / 0x0161), 44100 Hz, stereo, fltp, 192 kb/s Stream #0:1(eng): Video: vc1 (Advanced) (WVC1 / 0x31435657), yuv420p, 1280x720, 5942 kb/s, 29.97 tbr, 1k tbn, 1k tbc Output #0, rawvideo, to 'pipe:': Metadata: SfOriginalFPS : 299700 WMFSDKVersion : 11.0.6001.7000 WMFSDKNeeded : 0.0.0.0000 comment : Footage: Small World Productions, Inc; Tourism New Zealand | Producer: Gary F. Spradling | Music: Steve Ball title : Wildlife in HD copyright : © 2008 Microsoft Corporation IsVBR : 0 DeviceConformanceTemplate: AP@L3 encoder : Lavf55.33.100 Stream #0:0(eng): Video: bmp, bgr24, 1280x720, q=2-31, 200 kb/s, 90k tbn, 29.97 tbc Stream mapping: Stream #0:1 -> #0:0 (vc1 -> bmp) Press [q] to stop, [?] for help frame= 3 fps=0.0 q=0.0 size= 8100kB time=00:00:00.10 bitrate=662902.1kbits/s frame= 29 fps= 26 q=0.0 size= 78302kB time=00:00:00.96 bitrate=662902.3kbits/s frame= 50 fps= 30 q=0.0 size= 135003kB time=00:00:01.66 bitrate=662902.2kbits/s frame= 65 fps= 30 q=0.0 size= 175503kB time=00:00:02.16 bitrate=662902.2kbits/s frame= 80 fps= 30 q=0.0 size= 216004kB time=00:00:02.66 bitrate=662902.1kbits/s frame= 95 fps= 30 q=0.0 size= 256505kB time=00:00:03.16 bitrate=662902.1kbits/s [asf @ 0x600059480] ff asf bad header 74 at:5053733 [asf @ 0x600059480] invalid packet_length -1908511255 at:5053740 [asf @ 0x600059480] ff asf bad header d4 at:5053759 [asf @ 0x600059480] ff asf skip 55629 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5181733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5189733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5197733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5205733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5213733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5221733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5229733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5237733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5245733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5357733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5365733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5373733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5381733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5493733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5501733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5509733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5517733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5629733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5637733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5645733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5653733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5701733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5709733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5717733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5725733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5805733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5813733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5821733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5829733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5877733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5885733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5893733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5901733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5949733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5957733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5965733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] ff asf bad header 0 at:5973733 [asf @ 0x600059480] ff asf skip 7991 (unknown stream) [asf @ 0x600059480] packet_obj_size invalid Last message repeated 15 times [asf @ 0x600059480] unexpected packet_replic_size of 2 [asf @ 0x600059480] packet_obj_size invalid Last message repeated 7 times [asf @ 0x600059480] ff asf skip 2562 (unknown stream) [asf @ 0x600059480] packet_obj_size invalid Last message repeated 3 times [asf @ 0x600059480] ff asf skip 448 (unknown stream) [asf @ 0x600059480] packet_obj_size invalid Last message repeated 9 times [asf @ 0x600059480] unexpected packet_replic_size of 6 [asf @ 0x600059480] packet_obj_size invalid Last message repeated 7 times [asf @ 0x600059480] packet_frag_size is invalid (1749-9) [asf @ 0x600059480] packet_obj_size invalid Last message repeated 13 times [asf @ 0x600059480] packet_frag_size is invalid (1749-9) [asf @ 0x600059480] packet_obj_size invalid Last message repeated 24 times [asf @ 0x600059480] unexpected packet_replic_size of 6 [asf @ 0x600059480] packet_obj_size invalid Last message repeated 6 times [asf @ 0x600059480] unexpected packet_replic_size of 5 [asf @ 0x600059480] packet_obj_size invalid Last message repeated 6 times [asf @ 0x600059480] packet_frag_size is invalid (1749-9) [asf @ 0x600059480] packet_obj_size invalid [asf @ 0x600059480] packet_frag_size is invalid (1749-9) [asf @ 0x600059480] packet_obj_size invalid Last message repeated 2 times [asf @ 0x600059480] unexpected packet_replic_size of 5 [asf @ 0x600059480] packet_obj_size invalid Last message repeated 8 times [asf @ 0x600059480] unexpected packet_replic_size of 5 [asf @ 0x600059480] packet_obj_size invalid Last message repeated 39 times [asf @ 0x600059480] packet_frag_size is invalid (1749-40)
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