Hi, I noticed the different outputs of ffprobe for file input and binary data input.
ffprobe -v error -show_streams -print_format xml Y001BAQ9k3SU-140.mp4 Output: <?xml version="1.0" encoding="UTF-8"?> <ffprobe> <streams> <stream index="0" codec_name="h264" codec_long_name="H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10" profile="Main" codec_type="video" codec_time_base="1001/60000" codec_tag_string="avc1" codec_tag="0x31637661" width="1280" height="720" coded_width="1280" coded_height="720" has_b_frames="1" sample_aspect_ratio="1:1" display_aspect_ratio="16:9" pix_fmt="yuv420p" level="31" color_range="tv" color_space="bt709" color_transfer="bt709" color_primaries="bt709" chroma_location="left" refs="1" is_avc="true" nal_length_size="4" r_frame_rate="30000/1001" avg_frame_rate="30000/1001" time_base="1/90000" start_pts="3780" start_time="0.042000" duration_ts="1015830" duration="11.287000" bit_rate="1041887" bits_per_raw_sample="8" nb_frames="337"> <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"/> <tag key="language" value="und"/> <tag key="handler_name" value="ISO Media file produced by Google Inc. Created on: 12/09/2017."/> </stream> <stream index="1" codec_name="aac" codec_long_name="AAC (Advanced Audio Coding)" profile="LC" codec_type="audio" codec_time_base="1/44100" codec_tag_string="mp4a" codec_tag="0x6134706d" sample_fmt="fltp" sample_rate="44100" channels="2" channel_layout="stereo" bits_per_sample="0" r_frame_rate="0/0" avg_frame_rate="0/0" time_base="1/44100" start_pts="0" start_time="0.000000" duration_ts="495640" duration="11.239002" bit_rate="125667" max_bit_rate="125667" nb_frames="484"> <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"/> <tag key="language" value="und"/> <tag key="handler_name" value="ISO Media file produced by Google Inc. Created on: 12/09/2017."/> </stream> </streams> </ffprobe> cat Y001BAQ9k3SU-140.mp4 | ffprobe -v error -show_streams -i pipe: -print_format xml <?xml version="1.0" encoding="UTF-8"?> <ffprobe> [mov,mp4,m4a,3gp,3g2,mj2 @ 0x55d1d5959ae0] stream 1, offset 0x30: partial file <streams> <stream index="0" codec_name="h264" codec_long_name="H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10" codec_type="video" codec_time_base="1001/60000" codec_tag_string="avc1" codec_tag="0x31637661" width="1280" height="720" coded_width="1280" coded_height="720" has_b_frames="0" sample_aspect_ratio="1:1" display_aspect_ratio="16:9" level="-99" chroma_location="left" refs="1" is_avc="true" nal_length_size="4" r_frame_rate="30000/1001" avg_frame_rate="30000/1001" time_base="1/90000" duration_ts="1012050" duration="11.245000" bit_rate="1041887" nb_frames="337"> <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"/> <tag key="language" value="und"/> <tag key="handler_name" value="ISO Media file produced by Google Inc. Created on: 12/09/2017."/> </stream> <stream index="1" codec_name="aac" codec_long_name="AAC (Advanced Audio Coding)" codec_type="audio" codec_time_base="1/44100" codec_tag_string="mp4a" codec_tag="0x6134706d" sample_fmt="fltp" sample_rate="44100" channels="2" channel_layout="stereo" bits_per_sample="0" r_frame_rate="0/0" avg_frame_rate="0/0" time_base="1/44100" duration_ts="495905" duration="11.245011" bit_rate="125667" max_bit_rate="125667" nb_frames="484"> <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"/> <tag key="language" value="und"/> <tag key="handler_name" value="ISO Media file produced by Google Inc. Created on: 12/09/2017."/> </stream> </streams> </ffprobe> You can see there are some differences. The pix_fmt="yuv420p" is lost. And because of this, if I send the same pipe input to ffmpeg, it gives me errors: cat Y001BAQ9k3SU-140.mp4 | ffmpeg -nostats -probesize 100M -analyzeduration 100M -i pipe: -s 456x256 -r 5 -f image2pipe -pix_fmt rgb24 -vcodec rawvideo pipe: And the error is ffmpeg version 3.2.14-1~deb9u1 Copyright (c) 2000-2019 the FFmpeg developers built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516 configuration: --prefix=/usr --extra-version='1~deb9u1' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libebur128 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared libavutil 55. 34.101 / 55. 34.101 libavcodec 57. 64.101 / 57. 64.101 libavformat 57. 56.101 / 57. 56.101 libavdevice 57. 1.100 / 57. 1.100 libavfilter 6. 65.100 / 6. 65.100 libavresample 3. 1. 0 / 3. 1. 0 libswscale 4. 2.100 / 4. 2.100 libswresample 2. 3.100 / 2. 3.100 libpostproc 54. 1.100 / 54. 1.100 [mov,mp4,m4a,3gp,3g2,mj2 @ 0x56129aff3f80] stream 1, offset 0x30: partial file [mov,mp4,m4a,3gp,3g2,mj2 @ 0x56129aff3f80] Could not find codec parameters for stream 0 (Video: h264 (avc1 / 0x31637661), none, 1280x720, 1041 kb/s): unspecified pixel format Consider increasing the value for the 'analyzeduration' and 'probesize' options Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'pipe:': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 encoder : Lavf58.29.100 Duration: 00:00:11.25, bitrate: N/A Stream #0:0(und): Video: h264 (avc1 / 0x31637661), none, 1280x720, 1041 kb/s, SAR 1:1 DAR 16:9, 29.97 fps, 29.97 tbr, 90k tbn, 180k tbc (default) Metadata: handler_name : ISO Media file produced by Google Inc. Created on: 12/09/2017. Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s (default) Metadata: handler_name : ISO Media file produced by Google Inc. Created on: 12/09/2017. [buffer @ 0x56129b00d060] Unable to parse option value "-1" as pixel format Last message repeated 1 times [buffer @ 0x56129b00d060] Error setting option pix_fmt to value -1. [graph 0 input from stream 0:0 @ 0x56129b00cf60] Error applying options to the filter. Error opening filters! Please check! Thanks, Ming _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".