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Autres articles (96)
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MediaSPIP 0.1 Beta version
25 avril 2011, parMediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
The zip file provided here only contains the sources of MediaSPIP in its standalone version.
To get a working installation, you must manually install all-software dependencies on the server.
If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...) -
Multilang : améliorer l’interface pour les blocs multilingues
18 février 2011, parMultilang est un plugin supplémentaire qui n’est pas activé par défaut lors de l’initialisation de MediaSPIP.
Après son activation, une préconfiguration est mise en place automatiquement par MediaSPIP init permettant à la nouvelle fonctionnalité d’être automatiquement opérationnelle. Il n’est donc pas obligatoire de passer par une étape de configuration pour cela. -
HTML5 audio and video support
13 avril 2011, parMediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
For older browsers the Flowplayer flash fallback is used.
MediaSPIP allows for media playback on major mobile platforms with the above (...)
Sur d’autres sites (7411)
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"ffmpeg exited with code 1 : https://drive.google.com/uc?id=file_id Server returned 403 Forbidden (access denied)\n" [closed]
30 novembre 2023, par Shihab Ahmed Eftysometimes I can able to access sometime sometimes it is showing to me this error


"ffmpeg exited with code 1 : https://drive.google.com/uc?id=file_id Server returned 403 Forbidden (access denied)\n"


"ffmpeg exited with code 1 : https://drive.google.com/uc?id=file_id Server returned 403 Forbidden (access denied)\n"


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WinAPI multithreading access violation when writing in local variable
26 février 2016, par JustPingoI’m making a multithreaded program using Visual C++, Win32 API (using
_beginthread
) that also uses FFmpeg (it is claimed to be thread-safe, and I’m using it only with one single thread anyway).Here is the part of my thread’s code that causes problems (everything is inside of the thread function) :
Arena* arena = NULL;
switch (task) {
case TaskOne:
arena = (Arena*) malloc(sizeof(Arena));
for (uint i = 0; i < FIGHTSPERROUND; i++) {
generateArena(arena, ARENAWALLSAMOUNT, ARENAWIDTH, ARENAHEIGHT, ARENAMAXENTITIES, 255);
spawnPlayer(arena, playerOne, 3, 1, 0, 0, ARENAPLAYERLIFE);
spawnPlayer(arena, playerTwo, 2, 2, ARENAWIDTH-1, ARENAHEIGHT-1, ARENAPLAYERLIFE);
do {
tickArena(arena);
} while ((result = getResult(arena)) == 0);
switch (result) {
case 1: teamOneScore++; break;
case 2: teamTwoScore++; break;
default: break;
}
freeArena(arena);
clearMemory(playerOne);
clearMemory(playerTwo);
clearBrain(playerOne);
clearBrain(playerTwo);
}
threadTeamOneScore[threadID] = teamOneScore;
threadTeamTwoScore[threadID] = teamTwoScore;
break;
default: break;
}Here is how I generate my arena :
void generateArena(Arena* arena, uint wallsAmount, uint xSize, uint ySize, uint maxEntities, uint maxTurns) {
CasesTypes** map;
map = (CasesTypes**) malloc(xSize * sizeof(CasesTypes*));
memset(map, 0, xSize * sizeof(CasesTypes*));
for (uint i = 0; i < xSize; i++) {
map[i] = (CasesTypes*)malloc(ySize * sizeof(CasesTypes));
memset(map[i], 0, ySize * sizeof(CasesTypes));
}
arena->map = map;
arena->entities = (Entity*) malloc(maxEntities * sizeof(Entity));
memset(arena->entities, 0, maxEntities * sizeof(Entity));
arena->width = xSize;
arena->height = ySize;
arena->maxEntities = maxEntities;
arena->maxTurns = maxTurns;
arena->currentTurn = 0;
arena->entitiesAmount = 0;
for (uint i = 0; i < wallsAmount; i++)
arena->map[random2(1, xSize-1)][random2(1, ySize-1)] = Wall;
}This works as expected 4 times in 5.
But sometimes, for some reason,arena = (Arena*) malloc(sizeof(Arena));
throws an access violation exception.For example, Visual Studio 2015’s debugger once said :
Exception thrown at 0x77DBE389 (ntdll.dll) in MyProgram.exe: 0xC0000005: Access violation writing location 0x007C160F.
When I used the debugger to find what
((void*) 0x007C160F)
was, it always happened to be something similar to :avformat-57.dll!0x007c160f (load symbols for additional information)
avformat is a part of FFmpeg. The address was different every times, but it always had something to do with FFmpeg.
I can’t figure out what is causing the problem.
If that can help, sometimes the arena also happens to get corrupted (some of its fields get extremely big while generating them withgenerateArena
although it is never changed and only set once to an integer, this leads to a crash later).Thank you in advance !
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Libavcodec : How to tell end of access unit when decoding H.264 stream
22 septembre 2011, par FlameI'm receiving H.264 video over RTP and decoding it with libavcodec. I'm unpackaging the NAL units from the RTP packets before feeding them to avcodec (including reassembling fragmentation units).
I'm trying to show effective decoding frame rate. I used to log the time after a successful decode video call where *got_picture_ptr is non-zero. So far this worked since I only ever got video where there was one slice per frame. But now I receive video where both I and P frames consist of 2 NAL units each, of types 5 and 1 respectively. Now when I feed the either slice of a frame, decode_video return that it got a picture, and the pAVFrame->coded_picture_number is increased from every slice.
How do I go about reliably finding the beginning or end of a video frame/picture/access unit ?
I've dumped out a few NAL units from the stream and run them through h264_analyze from h264bitstream.
Output from h264_analyze on 4 NAL Units
!! Found NAL at offset 695262 (0xA9BDE), size 25 (0x0019) ==================== NAL ==================== forbidden_zero_bit : 0 nal_ref_idc : 1 nal_unit_type : 7 ( Sequence parameter set ) ======= SPS ======= profile_idc : 66 constraint_set0_flag : 1 constraint_set1_flag : 1 constraint_set2_flag : 1 constraint_set3_flag : 0 reserved_zero_4bits : 0 level_idc : 32 seq_parameter_set_id : 0 chroma_format_idc : 0 residual_colour_transform_flag : 0 bit_depth_luma_minus8 : 0 bit_depth_chroma_minus8 : 0 qpprime_y_zero_transform_bypass_flag : 0 seq_scaling_matrix_present_flag : 0 log2_max_frame_num_minus4 : 12 pic_order_cnt_type : 2 log2_max_pic_order_cnt_lsb_minus4 : 0 delta_pic_order_always_zero_flag : 0 offset_for_non_ref_pic : 0 offset_for_top_to_bottom_field : 0 num_ref_frames_in_pic_order_cnt_cycle : 0 num_ref_frames : 1 gaps_in_frame_num_value_allowed_flag : 0 pic_width_in_mbs_minus1 : 79 pic_height_in_map_units_minus1 : 44 frame_mbs_only_flag : 1 mb_adaptive_frame_field_flag : 0 direct_8x8_inference_flag : 1 frame_cropping_flag : 0 frame_crop_left_offset : 0 frame_crop_right_offset : 0 frame_crop_top_offset : 0 frame_crop_bottom_offset : 0 vui_parameters_present_flag : 1 === VUI === aspect_ratio_info_present_flag : 1 aspect_ratio_idc : 1 sar_width : 0 sar_height : 0 overscan_info_present_flag : 0 overscan_appropriate_flag : 0 video_signal_type_present_flag : 1 video_format : 5 video_full_range_flag : 1 colour_description_present_flag : 0 colour_primaries : 0 transfer_characteristics : 0 matrix_coefficients : 0 chroma_loc_info_present_flag : 0 chroma_sample_loc_type_top_field : 0 chroma_sample_loc_type_bottom_field : 0 timing_info_present_flag : 1 num_units_in_tick : 1 time_scale : 25 fixed_frame_rate_flag : 0 nal_hrd_parameters_present_flag : 0 vcl_hrd_parameters_present_flag : 0 low_delay_hrd_flag : 0 pic_struct_present_flag : 0 bitstream_restriction_flag : 1 motion_vectors_over_pic_boundaries_flag : 1 max_bytes_per_pic_denom : 0 max_bits_per_mb_denom : 0 log2_max_mv_length_horizontal : 6 log2_max_mv_length_vertical : 6 num_reorder_frames : 0 max_dec_frame_buffering : 1 === HRD === cpb_cnt_minus1 : 0 bit_rate_scale : 0 cpb_size_scale : 0 initial_cpb_removal_delay_length_minus1 : 0 cpb_removal_delay_length_minus1 : 0 dpb_output_delay_length_minus1 : 0 time_offset_length : 0 !! Found NAL at offset 695290 (0xA9BFA), size 4 (0x0004) ==================== NAL ==================== forbidden_zero_bit : 0 nal_ref_idc : 1 nal_unit_type : 8 ( Picture parameter set ) ======= PPS ======= pic_parameter_set_id : 0 seq_parameter_set_id : 0 entropy_coding_mode_flag : 0 pic_order_present_flag : 0 num_slice_groups_minus1 : 0 slice_group_map_type : 0 num_ref_idx_l0_active_minus1 : 0 num_ref_idx_l1_active_minus1 : 0 weighted_pred_flag : 0 weighted_bipred_idc : 0 pic_init_qp_minus26 : 3 pic_init_qs_minus26 : 0 chroma_qp_index_offset : 0 deblocking_filter_control_present_flag : 1 constrained_intra_pred_flag : 0 redundant_pic_cnt_present_flag : 0 transform_8x8_mode_flag : 1 pic_scaling_matrix_present_flag : 0 second_chroma_qp_index_offset : 1 !! Found NAL at offset 695297 (0xA9C01), size 50725 (0xC625) ==================== NAL ==================== forbidden_zero_bit : 0 nal_ref_idc : 1 nal_unit_type : 5 ( Coded slice of an IDR picture ) ======= Slice Header ======= first_mb_in_slice : 0 slice_type : 2 ( I slice ) pic_parameter_set_id : 0 frame_num : 0 field_pic_flag : 0 bottom_field_flag : 0 idr_pic_id : 0 pic_order_cnt_lsb : 0 delta_pic_order_cnt_bottom : 0 redundant_pic_cnt : 0 direct_spatial_mv_pred_flag : 0 num_ref_idx_active_override_flag : 0 num_ref_idx_l0_active_minus1 : 0 num_ref_idx_l1_active_minus1 : 0 cabac_init_idc : 0 slice_qp_delta : 5 sp_for_switch_flag : 0 slice_qs_delta : 0 disable_deblocking_filter_idc : 0 slice_alpha_c0_offset_div2 : 0 slice_beta_offset_div2 : 0 slice_group_change_cycle : 0 === Prediction Weight Table === luma_log2_weight_denom : 0 chroma_log2_weight_denom : 0 luma_weight_l0_flag : 0 chroma_weight_l0_flag : 0 luma_weight_l1_flag : 0 chroma_weight_l1_flag : 0 === Ref Pic List Reordering === ref_pic_list_reordering_flag_l0 : 0 ref_pic_list_reordering_flag_l1 : 0 === Decoded Ref Pic Marking === no_output_of_prior_pics_flag : 0 long_term_reference_flag : 0 adaptive_ref_pic_marking_mode_flag : 0 !! Found NAL at offset 746025 (0xB6229), size 38612 (0x96D4) ==================== NAL ==================== forbidden_zero_bit : 0 nal_ref_idc : 1 nal_unit_type : 5 ( Coded slice of an IDR picture ) ======= Slice Header ======= first_mb_in_slice : 1840 slice_type : 2 ( I slice ) pic_parameter_set_id : 0 frame_num : 0 field_pic_flag : 0 bottom_field_flag : 0 idr_pic_id : 0 pic_order_cnt_lsb : 0 delta_pic_order_cnt_bottom : 0 redundant_pic_cnt : 0 direct_spatial_mv_pred_flag : 0 num_ref_idx_active_override_flag : 0 num_ref_idx_l0_active_minus1 : 0 num_ref_idx_l1_active_minus1 : 0 cabac_init_idc : 0 slice_qp_delta : 5 sp_for_switch_flag : 0 slice_qs_delta : 0 disable_deblocking_filter_idc : 0 slice_alpha_c0_offset_div2 : 0 slice_beta_offset_div2 : 0 slice_group_change_cycle : 0 === Prediction Weight Table === luma_log2_weight_denom : 0 chroma_log2_weight_denom : 0 luma_weight_l0_flag : 0 chroma_weight_l0_flag : 0 luma_weight_l1_flag : 0 chroma_weight_l1_flag : 0 === Ref Pic List Reordering === ref_pic_list_reordering_flag_l0 : 0 ref_pic_list_reordering_flag_l1 : 0 === Decoded Ref Pic Marking === no_output_of_prior_pics_flag : 0 long_term_reference_flag : 0 adaptive_ref_pic_marking_mode_flag : 0
Both I slices show the frame_num = 0. The next 2 (not shown) have frame_num = 1.